electrical engineering

Photovoltaic reliability, using micro inverter

<div style="text-align: justify;">In my previous article I presented the principle for avoiding production losses  when photovoltaic systems are located in such cases where there is shadow of  trees, dust, chimneys, antenna, other buildings … We speak of photovoltaic shading.<br />
Then I presented a good solution to avoid these which is distributed MPP Tracking: one micro inverter per photovoltaic module to track individual Maximum Power Point. I also detailed 2 design approaches with pro’s & con’s arguments.<br />
In this article, I will give some concerns and questions about photovoltaic reliability.</div><div style="text-align: justify;"><br />
</div><div style="text-align: center;"><img alt="http://engineering.electrical-equipment.org/wp-content/uploads/2010/02/photovoltaic-shading1.jpg" src="http://engineering.electrical-equipment.org/wp-content/uploads/2010/02/photovoltaic-shading1.jpg" /></div><div style="text-align: justify;"><br />
<div style="background-color: orange; color: red; text-align: center;">photovoltaic shading</div><br />
It’s a main point and certainly the success key factor of this disruptive innovation.<br />
A manufacturer writes “no failure point”: that‘s great! But when a micro converter is embedded on the photovoltaic module and fixed on a roof, it’s not acceptable to have failure. This is not thinking to have a field engineer or installer which climb on the roof, uninstall a photovoltaic module and break water tightness (in case of BIPV)  for a US50$ micro-converter part only !<br />
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The design must integrate the unfavourable constraints for the component choice (very low temperature the winter (- 20°C), very high temperature the summer (+70°C)). To be serious, a manufacturer should describe which working profile conditions are using for the design…<br />
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This is the most critical point and a lot of manufacturers are not talkative on this topic.<br />
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One indicates: “specific components are chosen for reliability design (HALT). Also those tests have run for the equivalent of over 50 years”. It’s great, but it’s not serious: the life time indicate nothing about photovoltaic reliability!<br />
(for example : I can keep a car during 20 years (20 Years life time) and every week the car mechanic repair it (7 days MTBF))<br />
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What is the Photovoltaic reliability of distributed system? What is the true MTBF or the true “lambda” ?<br />
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How many chances have a customer to have a failure on his roof? How will customer ROI be impacted if we have to repair it during the life-time. That is the true and one question I have to request myself before suggests it on his roof! <br />
To summarize<br />
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In my point of view this distributed technology applied to photovoltaic sytem is a very interesting new approach of solar energy harvest with a lot of benefices under specific condition. But today this technology is developed by very small companies witch take not enough in count the photovoltaic reliability aspect. It’s a shame because this innovation could be nip in the bud.<br />
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Yves Jeanjean</div>

Photovoltaic reliability, using micro inverter

In my previous article I presented the principle for avoiding production losses when photovoltaic systems are located in such cases where there is shadow of trees, dust, chimneys, antenna, other bui…

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26 Dec 2010

PRACTICAL AND IDEAL TRANSFORMER

<div style="background-color: yellow; color: red; text-align: center;"><span style="font-size: large;">Ideal Transformer On Load.</span></div><div style="background-color: white; color: red; text-align: justify;"><span style="font-size: large;"> </span></div><div style="text-align: justify;">As the transformer is loaded, current I2 flows in the secondary. When this current I2 flows through N2 it produces a flux <span style="color: black;">φ</span>2 . The polarity of <span style="color: black;">φ</span>2 is such that it opposes the main flux <span style="color: black;">φ</span>M. The instantaneous effect of this opposition is that <span style="color: black;">φ</span>M is reduced and instantaneously the induced voltage E1 in the primary is less than V1. <br />
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Because of this voltage difference, the primary current I1 increases, and as it passes through the primary turns N1, it produces an magneto motive force (mmf) to counter the instantaneous reduction in <span style="color: black;">φ</span>M . The effect of this increased primary mmf is to bring the flux in the core back to the original value of <span style="color: black;">φ</span>M.<br />
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Therefore when the supply voltage V1 is constant, despite changes in load current, the flux in a transformer remains at a constant value causing a voltage E1  to be induced in the primary windings and a voltage E2 to be induced in the secondary windings. This relationship neglects the magnetizing current demanded by the imperfections of the core.</div><div style="text-align: justify;"></div><div style="text-align: justify;"></div><br />
<div style="background-color: yellow; color: red; text-align: center;"><span style="font-size: large;">PRACTICAL OR NON IDEAL TRANSFORMER</span></div><br />
Transformation of energy is not perfect. Not all the flux produced by the primary winding links with the secondary, for example transformer has a leakage reactance. Establishing a flux involves the drawing of a magnetizing current. Pulsation’s of the flux  in the core produce a core loss due to HYSTERESIS and EDDY CURRENTS.<br />
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The continuing loss of energy to the core produces heat which must be removed from the transformer.<br />
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PRACTICAL AND IDEAL TRANSFORMER

Ideal Transformer On Load. As the transformer is loaded, current I2 flows in the secondary. When this current I2 flows through N2 it produces a flux φ2 . The polarity of φ2 is such that it opposes the…

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26 Dec 2010

BASIC THEORY OF TRANSFORMERS

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<span style="background-color: red; font-size: large;">INTRODUCTION </span></div>
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The invention of the power transformer in the latter part of the nineteenth century made possible the development of the modern constant voltage AC supply system, with power stations often located many miles from the centers of electrical load. Before that, in the early days, the supplies were DC systems with generation, of necessity close to the point of loading.<br />
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The amount of auxiliary plant needing electrical supply in a large power station requires five or possibly six different voltage levels, requiring 60 or more transformers to provide the interconnections.<br />
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The transformer interconnects and transfers power between systems at different voltages. It does this at very high efficiency, at 99% or higher.<br />
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Transformers in power stations are generally three phase and double wound, i.e. they have electrically separate primary and secondary windings<br />
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<span style="font-size: large;"><span style="background-color: yellow; color: red;">BASIC THEORY OF TRANSFORMERS</span></span></div>
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<span style="color: black; font-size: large;"><span style="font-size: small;"><span style="background-color: white;"> In figure 1, an ac generator connected to circuit 1 , referred to as PRIMARY, transfers energy to the magnetic circuit, which in turn transfers this energy to circuit 2, referred to as SECONDARY. The flux in the core  </span></span></span><span style="color: black;"> φ</span><span style="font-size: large;"><span style="color: black; font-size: small;"><span style="background-color: white;">M  is common to both circuits, and is responsible for this transfer of energy.</span></span></span><br />
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<img alt="http://www7.0zz0.com/2010/12/25/13/455207520.png" src="http://www7.0zz0.com/2010/12/25/13/455207520.png" /><span style="font-size: large;"><span style="color: black; font-size: small;"><span style="background-color: white;"> </span></span></span></div>
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<span style="background-color: orange; color: red;">Fig. 1.1. Ideal transformer</span></div>
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In an ideal transformer, there are no losses in the core and the windings have no resistance or leakage reactance.<br />
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Consequently, the voltage V1 applied at the primary terminals will be used to circulate the primary current I1 against the opposing emf induced by the main flux. This INDUCED EMF e1 can be calculated by the following equation:<br />
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e1 = N1 x change in flux <br />
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or e1  =  N1  x change in flux  /  change in t    ( 1 )<br />
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where N1 is the number of primary turns.<br />
Similarly, the secondary winding is linked by the same flux as the primary winding and will have an emf e2 induced in it, <br />
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e2 = N2 x change in flux   ( 2 )<br />
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where N2 is the number of secondary turns.<br />
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In the above e1 and e2 are instantaneous values of induced voltage. However it is usual and more convenient to use rms ( root mean square) values. It can be shown that, as a general formula <br />
E  =  4.44 N <span style="color: black;">φ</span>M f     ( 3 )<br />
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where    </div>
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E = rms induced voltage<br />
N = number of turns<br />
<span style="color: black;">φ</span>M = rms value of flux<br />
f = system frequency ( 60 cps)<br />
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In an ideal transformers, the losses which are normally small are ignored, and then<br />
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V1 / V2  =  N1 / N2 = I2 / I1      ( 4 )<br />
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This important relationship must be clearly understood and memorized.<br />
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<span style="background-color: yellow; color: red; font-size: small;">The operation of the transformer can be summarized as follows:</span></div>
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1.    When an alternating voltage V1 is applied to a primary coil of N1 turns linking a suitable iron core as shown in figure 1. A magnetizing reactive current flows in the coil, establishing flux <span style="color: black;">φ</span>M in the core (and small additional fluxes elsewhere, neglected for a first consideration).<br />
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2.    The flux <span style="color: black;">φ</span>M, is such that it induces in the primary coil an emf E1, by self induction to counter the applied voltage V1 and establish electrical balance. If a secondary coil of N2 turns is linked by the same flux, then by mutual induction, an emf E2, is developed in this coil. If a load is connected to the secondary coil, a current I2 will flow in the secondary circuit under the influence of induced voltage E2. This induced voltage E2 appears across the secondary terminals as V2.<br />
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<span class="post-date updated">السبت، 25 ديسمبر، 2010 </span>
     <span class="author vcard">  <span class="fn">justaneng</span></span>

BASIC THEORY OF TRANSFORMERS

INTRODUCTION The invention of the power transformer in the latter part of the nineteenth century made possible the development of the modern constant voltage AC supply system, with power stations of…

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25 Dec 2010

TROUBLESHOOTING OF TRANSFORMER

<div style="text-align: center;"><span style="color: white;">TROUBLE SHOOTING OF TRANSFORMER</span></div><table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr style="height: 29.3pt; page-break-inside: avoid;">   <td colspan="4" style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext; border-style: double double solid; border-width: 4.5pt 4.5pt 1pt; height: 29.3pt; padding: 0cm; width: 392.2pt;" width="523"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 15.15pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">TROUBLE   SHOOTING OF TRANSFORMER</span></b></div></td>  </tr>
<tr style="height: 22.1pt; page-break-inside: avoid;">   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 3pt 4.5pt; height: 22.1pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 8.15pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">NO.</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 3pt medium; height: 22.1pt; padding: 0cm; width: 89.85pt;" width="120"><h5>TROUBLES</h5></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 3pt medium; height: 22.1pt; padding: 0cm; width: 110pt;" width="147"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 6.35pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">CAUSE</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 3pt medium; height: 22.1pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin-right: 14pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">ACTION</span></b></div></td>  </tr>
<tr style="height: 160.05pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext; border-style: none solid none double; border-width: medium 1pt medium 4.5pt; height: 160.05pt; padding: 0cm; width: 33.55pt;" width="45"><div class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">1</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 160.05pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Stop of transformer</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">(Except OLTC)</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 160.05pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin-left: 7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Internal fault of</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">main tank</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none double none none; border-width: medium 4.5pt medium medium; height: 160.05pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin: 0cm 14pt 0.0001pt 18.75pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Check on relay  </span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 14pt 0.0001pt 18.75pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">     </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">operation.</span></div><div class="MsoNormal" style="direction: ltr; line-height: 150%; margin: 0cm 14pt 0.0001pt 18.75pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;">(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;"> Electrical tests</span></div><div class="MsoBodyTextIndent3" style="margin: 0cm 36.75pt 0.0001pt; text-indent: -30pt;"><b>-1</b>    Measurement of insulation resistance</div><div class="MsoBodyTextIndent3" style="margin: 0cm 36.75pt 0.0001pt; text-indent: -30pt;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 36.75pt; text-align: left; text-indent: -30pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">-2</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Measurement of winding resistance</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 36.75pt; text-align: left; text-indent: -30pt; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 36pt; text-align: left; text-indent: -29.25pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">-3</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Measurement of voltage ratio.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 36pt; text-align: left; text-indent: -29.25pt; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 36.75pt; text-align: left; text-indent: -30pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">-4</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Measurement of exciting current</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 4.15pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Gas analysis of    </span></div><div class="MsoNormal" style="direction: ltr; margin-left: 4.15pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">     </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">transformer</span></div></td>  </tr>
<tr style="height: 154.65pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 154.65pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -19.25pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">1-1</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 154.65pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Operation of differntial   relay and buchholz relay or pressure relief device operate simultaneously</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 154.65pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Internal fault</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 154.65pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Action shall be same as   internal</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">fault procedures.</span></div></td>  </tr>
</tbody></table><br />
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<div></div><table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr style="height: 50.25pt; page-break-inside: avoid;">   <td style="border-color: windowtext windowtext -moz-use-text-color; border-style: double solid none double; border-width: 4.5pt 1pt medium 4.5pt; height: 50.25pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -17.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">1-2</span></b></div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double solid none none; border-width: 4.5pt 1pt medium medium; height: 50.25pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Operation of buchholz relay   and pressure relief device</span></div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double solid none none; border-width: 4.5pt 1pt medium medium; height: 50.25pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> <b>(2)</b> Internal fault</span></div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double double none none; border-width: 4.5pt 4.5pt medium medium; height: 50.25pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Action shall be same as   internal</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">fault procedures.</span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext; border-style: none solid none double; border-width: medium 1pt medium 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -17.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1-3</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">simultaneously</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Operation of</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">differential</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">relay only</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Internal fault</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> (2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Inrush current        </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">      at time of       </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">      energyization</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none double none none; border-width: medium 4.5pt medium medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoBodyTextIndent3" style="margin-left: 6.75pt; text-indent: 0cm;"><b>(1)</b>   Action shall be same  </div><div class="MsoBodyTextIndent3" style="margin-left: 6.75pt; text-indent: 0cm;"><b>     </b>as internal fault </div><div class="MsoBodyTextIndent3" style="margin-left: 6.75pt; text-indent: 0cm;">     procedures.</div><div class="MsoBodyTextIndent3"><br />
</div><div class="MsoNormal" style="direction: ltr; line-height: 150%; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;">(2)-1</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;"> Setting   values of </span></div><div class="MsoNormal" style="direction: ltr; line-height: 150%; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;">        </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;">relays.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">  <b>(2)-2</b> Value of inrush   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">          current.</span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -17.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1-4</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">Operation of buchholz relay (trip) only</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Internal fault</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> (2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Faulty   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">      operation</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoBodyTextIndent3"><b>(1)</b> Action shall be same as internal fault   procedures.</div><div class="MsoBodyTextIndent3"><br />
</div><div class="MsoNormal" style="direction: ltr; line-height: 150%; margin-left: 7.55pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;">(2)-1</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt; line-height: 150%;"> Check   wiring.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;">(2)-2</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"> Check contacts.</span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -17.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">1-5</span></b><b><span style="font-family: Arial; font-size: 11pt;"></span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Operation of pressure device </span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.3pt;">Only</span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Interal fault</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.3pt;"> (2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.3pt;"> </span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Faulty Operation</span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.9pt;"></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin-left: 21.85pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt;"> Action   shall be same as internal fault procedures.</span></div><div align="left" class="MsoBodyText2" style="margin: 0cm 4.05pt 0.0001pt 7pt; text-align: left;"><b>(2)-1</b>   Check wiring.</div><div class="MsoBodyTextIndent3"><b><span style="letter-spacing: 0.4pt;">(2)-2</span></b><span style="letter-spacing: 0.4pt;"> Check contacts.</span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 17.1pt; text-align: center; text-indent: -17.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">1-6</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Winding temp.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">indicator or</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">oil temp. indicator</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Internal fault</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Faulty operation</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Stop of cooling   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">      fan.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin-left: 21.85pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Action shall be same as internal fault procedures.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: left; text-indent: -7.35pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> <b>(2)-1</b> Check wiring</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 33.85pt; text-align: left; text-indent: -30pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (2)-2</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Sudden   variation of oil  temperature.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 21.85pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">    Check cooling fan.</span><span style="font-family: Arial; font-size: 11pt;"></span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">2</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Operation of</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">buchholz: relay</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(alarm) only</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Internal fault</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Trapped air or   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">      evoluation of   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">      dissolved gases</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> <b>(1)</b> Action shall be same   as    </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">      internal fault procedures.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 27.6pt; text-align: left; text-indent: -27pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">  <b>(2) -1</b> Analysis of gas   </span></div><div class="MsoNormal" style="direction: ltr; margin-left: 27.6pt; text-align: left; text-indent: -27pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">           </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">accumulated</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 48.25pt; text-align: left; text-indent: -14.4pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">  in Buchholz Relay.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 21.85pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> <b>(2)-2</b> Sudden variation of oil    </span></div><div class="MsoNormal" style="direction: ltr; margin-left: 21.85pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">          </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">temperature.</span></div></td>  </tr>
<tr style="height: 67pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 67pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">3</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 67pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Operation of relays such as   overcurrent relay, ground relay, arrestor etc.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 67pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin-left: 9pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Internal fault</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 9pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> External faults such as short- circuit</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">In the system</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 67pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Action shall be same as   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">       internal fault   procedures.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(2) -1</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Check any sign of </span></div><div class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">         </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Heavy   current</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">            circulation in the</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">            windings.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(2) -2</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Check any sign of</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 43pt; text-align: left; text-indent: -34.4pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">          on-load tap changer interrupting heavy   short-circuit current.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 45.6pt; text-align: left; text-indent: -34.4pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(2) -3</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Short-circuit current value, its duration time.</span></div></td>  </tr>
</tbody></table><br />
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<br />
<div style="text-align: center;"></div><table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr style="height: 32.55pt; page-break-inside: avoid;">   <td style="border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1pt 1pt 4.5pt; height: 32.55pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">4</span></b></div></td>   <td style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 1pt medium; height: 32.55pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 8.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Abnormality is found in   recording devices</span></div></td>   <td style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 1pt medium; height: 32.55pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin-left: 27pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- ditto -</span></div></td>   <td style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 1pt medium; height: 32.55pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 11.2pt; text-align: center; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- ditto -</span></div></td>  </tr>
<tr style="height: 44.15pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext; border-style: none solid none double; border-width: medium 1pt medium 4.5pt; height: 44.15pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 44.15pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">         High   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"> temperature</span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">   rise</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 44.15pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 14.4pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Period   required to Reach the maximum temperature and ambient temperature</span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">, Load </span><span style="font-family: Arial; font-size: 11pt;">factor or type of   load. Connection diagram of bank and internal connection tap voltage.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 8.75pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none double none none; border-width: medium 4.5pt medium medium; height: 44.15pt; padding: 0cm; width: 158.8pt;" width="212"><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; text-indent: -9pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">    If the oil temperature is about 80`C   over, the<sub> </sub>transformer must not be operated continuously.</span></div></td>  </tr>
<tr style="height: 269.4pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext; border-style: none solid none double; border-width: medium 1pt medium 4.5pt; height: 269.4pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 269.4pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-left: 5.35pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Burned coil</span></div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none solid none none; border-width: medium 1pt medium medium; height: 269.4pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Date and   time of burning.       Installation   site. Perod of use(immediately after operation period). Cause of failure:</span></div><div class="MsoNormal" style="direction: ltr; margin-top: 10.8pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">   Overload</span></div><div class="MsoNormal" style="direction: ltr; margin-top: 10.8pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">    Lighting</span></div><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Short   circuiting</span></div><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">(internal or   external)</span></div><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Others</span></div><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; text-indent: -9pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Existence   or absense of copper powder. Operation of protective devices (primary and   secondary)</span></div><div class="MsoNormal" style="direction: ltr; margin-top: 10.8pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext -moz-use-text-color -moz-use-text-color; border-style: none double none none; border-width: medium 4.5pt medium medium; height: 269.4pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: center; text-indent: -9pt; unicode-bidi: embed;"><br />
</div></td>  </tr>
<tr style="height: 44.15pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 44.15pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-top: 7.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">  Local heating</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.35pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; margin-left: 9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Heated point. Load   factor or type of load. Smoke.     Discoloration</span><span style="font-family: Arial; font-size: 11pt;">.</span></div><div class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: center; text-indent: -9pt; unicode-bidi: embed;"><br />
</div></td>  </tr>
</tbody></table><br />
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<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr style="height: 44.15pt; page-break-inside: avoid;">   <td style="border-color: windowtext windowtext -moz-use-text-color; border-style: double solid none double; border-width: 4.5pt 1pt medium 4.5pt; height: 44.15pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double solid none none; border-width: 4.5pt 1pt medium medium; height: 44.15pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-top: 7.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Insulation   resistance</span></div><div class="MsoNormal" style="direction: ltr; margin-top: 7.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">failure</span></div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double solid none none; border-width: 4.5pt 1pt medium medium; height: 44.15pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: justify; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Insulation   resistance:     </span></div><div class="MsoNormal" style="direction: ltr; text-align: justify; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">High voltage winding to low voltage   winding and tank. Low voltage winding to high voltage winding and tank.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">High voltage winding to low voltage   winding. Temperature and humidity at which mea surement is made.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Installation site (indoors or   outdoors). History of the transformer.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Dielectric strangth of the insulation   oil.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: windowtext windowtext -moz-use-text-color -moz-use-text-color; border-style: double double none none; border-width: 4.5pt 4.5pt medium medium; height: 44.15pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: center; text-indent: -9pt; unicode-bidi: embed;"><br />
</div></td>  </tr>
<tr style="height: 44.15pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 44.15pt; padding: 0cm; width: 33.55pt;" width="45"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 89.85pt;" width="120"><div class="MsoNormal" style="direction: ltr; margin-top: 7.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Noise</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 110pt;" width="147"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Operating conditions</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">(overload, normal)</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 44.15pt; padding: 0cm; width: 158.8pt;" width="212"><div align="center" class="MsoNormal" style="direction: ltr; margin: 10.8pt 0cm 0.0001pt 9pt; text-align: center; text-indent: -9pt; unicode-bidi: embed;"><br />
</div></td></tr>
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TROUBLESHOOTING OF TRANSFORMER

TROUBLE SHOOTING OF TRANSFORMER TROUBLE SHOOTING OF TRANSFORMER NO. TROUBLES CAUSE ACTION 1 Stop of transformer(Except OLTC) Internal fault ofmain tank (1) Check on relay …

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25 Dec 2010

TROUBLESHOOTING OF O.L.T.C

<div style="text-align: center;"><span style="color: white;">TROUBLE SHOOTING OF O.L.T.C</span></div><div></div><table border="1" cellpadding="0" cellspacing="0" class="MsoTableGrid" style="border-collapse: collapse; border: medium none; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr>   <td rowspan="4" style="border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1pt 1pt 4.5pt; padding: 0cm 5.4pt; width: 27.85pt;" valign="top" width="37"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
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</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">       <b>5</b></span></div></td>   <td rowspan="4" style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 1pt medium; padding: 0cm 5.4pt; width: 101.15pt;" valign="top" width="135"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
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</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Malfunction in transformer ( in   case of OLTC)</span></div></td>   <td rowspan="4" style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 1pt medium; padding: 0cm 5.4pt; width: 117.15pt;" valign="top" width="156"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Driverter switch fault</span></div></td>   <td style="border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">                 </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Electrical tests.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">a.<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">               </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Measurement of insulation resistance.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">b.<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">              </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Measurement of voltage rat.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">c.<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">               </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Measurement of exciting current.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><br />
</div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt;"> Gas analysis of OLTC oil.</span></div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt;"> Check any operation of relay</span></div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(4)</span></b><span style="font-family: Arial; font-size: 11pt;"> Check any external short      circuit.</span></div></td>  </tr>
<tr style="height: 28.4pt;">   <td rowspan="2" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 28.4pt; padding: 0cm 5.4pt; width: 27.85pt;" valign="top" width="37"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><br />
</div><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">5-1</span></b></div></td>   <td rowspan="2" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 28.4pt; padding: 0cm 5.4pt; width: 101.15pt;" valign="top" width="135"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Operation of Buchholz relay   simulationeously.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 28.4pt; padding: 0cm 5.4pt; width: 117.15pt;" valign="top" width="156"><div class="MsoNormal" style="direction: ltr; margin-left: 21.6pt; text-align: left; text-indent: -21.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt;"> Diverter switch fult.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 28.4pt; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt;"> Action shall be same as diverter switch fault.</span></div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 117.15pt;" valign="top" width="156"><div class="MsoNormal" style="direction: ltr; margin-left: 21.6pt; text-align: left; text-indent: -21.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt;"> Faulty operation of relay</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)-1</span></b><span style="font-family: Arial; font-size: 11pt;"> Check wiring.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)-2</span></b><span style="font-family: Arial; font-size: 11pt;"> Check contacts.</span></div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; padding: 0cm 5.4pt; width: 27.85pt;" valign="top" width="37"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">5-2</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 101.15pt;" valign="top" width="135"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Relay (No. 48) actuation for   incomplete tap changing.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 117.15pt;" valign="top" width="156"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">     Diverter switch.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; margin-left: 1.1pt; text-align: left; text-indent: -1.1pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt;"> Action shall be same as diverter switch fault.</span></div></td>  </tr>
<tr>   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; padding: 0cm 5.4pt; width: 27.85pt;" valign="top" width="37"><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">6</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; padding: 0cm 5.4pt; width: 101.15pt;" valign="top" width="135"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Improper stopping positions due to   incomplete tap changing or out-of stop in tap position</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; padding: 0cm 5.4pt; width: 117.15pt;" valign="top" width="156"><div class="MsoNormal" style="direction: ltr; margin-left: 17.3pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">   </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Driving motor    </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: -0.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">      does not operate</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 17.3pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">   </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Driving motor  </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: -0.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">      operare but  </span></div><div class="MsoNormal" style="direction: ltr; margin-left: -0.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">      incomplete tap-changing take place.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 21.6pt; text-align: left; text-indent: -21.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">      </span></span></b><span dir="LTR"><span style="font-family: Arial; font-size: 11pt;">Excessive operating   torque</span></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; padding: 0cm 5.4pt; width: 171pt;" valign="top" width="228"><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)-1</span></b><span style="font-family: Arial; font-size: 11pt;"> Check any operation of  </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">         circuit breaker, any   </span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">         improper voltage.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 28.3pt; text-align: left; text-indent: -30.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;"> (1)-2</span></b><span style="font-family: Arial; font-size: 11pt;"> Check motor, magnet brake pilot   switches relays (No. 4866).</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(1)-3</span></b><span style="font-family: Arial; font-size: 11pt;"> Check control circuit.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 30.6pt; text-align: left; text-indent: -30.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)-1</span></b><span style="font-family: Arial; font-size: 11pt;"> Check any slipping of magnetic brake.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 30.6pt; text-align: left; text-indent: -29.3pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)-2</span></b><span style="font-family: Arial; font-size: 11pt;"> Check contact positions close and open.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 30.6pt; text-align: left; text-indent: -30.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(2)-3</span></b><span style="font-family: Arial; font-size: 11pt;"> Check time setting value of relay No. 48T.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 30.6pt; text-align: left; text-indent: -30.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(3)-1</span></b><span style="font-family: Arial; font-size: 11pt;"> Tap position where excessive torque ocurrs.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 30.6pt; text-align: left; text-indent: -30.6pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">(3)-2</span></b><span style="font-family: Arial; font-size: 11pt;"> Check torque value by manual operation at driving mechanism and its   number manual operation.</span></div></td></tr>
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TROUBLESHOOTING OF O.L.T.C

TROUBLE SHOOTING OF O.L.T.C 5 Malfunction in transformer ( in case of OLTC) Driverter switch fault (1) Electrical tests.a. Measurement of insulation …

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25 Dec 2010

HIGH VOLTAGE CIRCUIT BREAKER PART 2

<h3 class="post-title entry-title"> <a href="http://hayatei.blogspot.com/2010/12/high-voltage-circuit-breaker.html">HIGH VOLTAGE CIRCUIT BREAKER PART 1</a></h3><h3 class="post-title entry-title"> </h3><div style="background-color: yellow; color: red; text-align: center;"><span style="font-size: medium;"><span>PNEUMATIC OPERATING DEVICE (KC – 1043) </span></span></div><div style="background-color: white; color: red; text-align: center;"><span style="font-size: small;"><br />
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</span></div><div align="center">  <table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: -5.25pt;"><tbody>
<tr style="height: 34.65pt;">   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(204, 204, 204) none repeat scroll 0% 0%; border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1.1pt 3pt 4.5pt; height: 34.65pt; padding: 0cm; width: 27.35pt;" width="36">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 14.4pt; text-align: center; text-indent: -17.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">No.</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(204, 204, 204) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1.1pt 3pt medium; height: 34.65pt; padding: 0cm; width: 97.95pt;" width="131">   <h5 align="center" style="margin: 0cm 4.9pt 0.0001pt; text-align: center;">Symptoms</h5></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(204, 204, 204) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 3pt medium; height: 34.65pt; padding: 0cm; width: 133pt;" width="177">   <h6>Cause</h6></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 3pt medium; height: 34.65pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoHeading7">Remedy</div></td>  </tr>
<tr style="height: 34.35pt; page-break-inside: avoid;">   <td rowspan="3" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1.1pt 1pt 4.5pt; height: 34.35pt; padding: 0cm; width: 27.35pt;" width="36">   <div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">1.</span></b></div></td>   <td rowspan="3" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 34.35pt; padding: 0cm; width: 97.95pt;" width="131">   <div class="MsoNormal" style="direction: ltr; margin-left: 11.65pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Magnetic valve fails to   operate</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 34.35pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 27pt; text-align: left; text-indent: -23pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Valve locked at low-pressure<span>       </span>position.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 34.35pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Raise pressure.</span></div></td>  </tr>
<tr style="height: 34.35pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 34.35pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 4pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Coil burnt and open circuit</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 34.35pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Replace coil</span></div></td>  </tr>
<tr style="height: 34.35pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 34.35pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 25.1pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Limit switch malfunctioning, </span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.5pt;"></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 34.35pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Adjust pressure on limit   switch or replace it.</span></div></td>  </tr>
<tr style="height: 35.55pt; page-break-inside: avoid;">   <td rowspan="3" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1.1pt 1pt 4.5pt; height: 35.55pt; padding: 0cm; width: 27.35pt;" width="36">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 8.65pt; text-align: center; text-indent: -8.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">2.</span></b></div></td>   <td rowspan="3" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 35.55pt; padding: 0cm; width: 97.95pt;" width="131">   <div class="MsoNormal" style="direction: ltr; margin-left: 11.65pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Magnetic valve stops halfway</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 35.55pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 4pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Drop in control pressure.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 35.55pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Raise pressure.</span></div></td>  </tr>
<tr style="height: 40.7pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 40.7pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 20.55pt; text-align: left; text-indent: -20.55pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span> </span>(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Circuit   closing and <span>      </span>circuit opening   magnetic </span></div><div align="center" class="MsoNormal" style="direction: ltr; margin-left: -9.45pt; text-align: center; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">valves operate <span>      </span></span></div><div align="center" class="MsoNormal" style="direction: ltr; margin-left: -9.45pt; text-align: center; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span> </span>simultaneously.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 40.7pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Temporarily turn off control   power source</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">and operate valve again.</span></div></td>  </tr>
<tr style="height: 64.4pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 64.4pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 27pt; text-align: justify; text-indent: -23pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Magnetic valve will not   self-hold.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 64.4pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Terminal P not supplied with <b>(+)</b>   power (Turn on <b>(+)</b> power). Limit switches out of order (refer to   descriptions on limit switch).</span></div></td>  </tr>
<tr style="height: 51.4pt; page-break-inside: avoid;">   <td rowspan="2" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1.1pt 4.5pt 4.5pt; height: 51.4pt; padding: 0cm; width: 27.35pt;" width="36">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 7.9pt; text-align: center; text-indent: -11.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.5pt;">3.</span></b></div></td>   <td rowspan="2" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1.1pt 4.5pt medium; height: 51.4pt; padding: 0cm; width: 97.95pt;" width="131">   <div class="MsoNormal" style="direction: ltr; margin-left: 10.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Magnetic   valve fails to stop automatically (electric circuit</span> <span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">is kept energized)</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 51.4pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; margin-left: 27pt; text-align: justify; text-indent: -23pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Improper pressure on limit   switches</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 51.4pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Adjust pressure on limit   switches.</span></div></td>  </tr>
<tr style="height: 65.65pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 65.65pt; padding: 0cm; width: 133pt;" width="177">   <div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span> </span>(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> Limit switches <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 20.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">malfunctioning (contact metal   dposited).</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 65.65pt; padding: 0cm; width: 148.7pt;" width="198">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Replace limit switches.</span></div></td>  </tr>
</tbody></table></div><h3 class="post-title entry-title" style="font-weight: normal;"><br />
</h3><h3 class="post-title entry-title" style="font-weight: normal; text-align: center;"><span style="font-size: medium;"><span style="background-color: yellow; color: red;">OTHERS</span></span></h3><div align="center">  <table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: 1.6pt;"><tbody>
<tr style="height: 33.1pt;">   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1pt 3pt 4.5pt; height: 33.1pt; padding: 0cm; width: 24.3pt;" width="32">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 18.5pt; text-align: center; text-indent: -18.4pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">No.</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 3pt medium; height: 33.1pt; padding: 0cm; width: 72.9pt;" width="97">   <div class="MsoHeading9">Symatoms</div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1.1pt 3pt medium; height: 33.1pt; padding: 0cm; width: 187.15pt;" width="250">   <div align="center" class="MsoHeading8" style="text-align: center; text-indent: -142.1pt;">Cause</div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 3pt medium; height: 33.1pt; padding: 0cm; width: 138pt;" width="184">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 114.75pt; text-align: center; text-indent: -4cm; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Remedy</span></b></div></td>  </tr>
<tr style="height: 44.5pt; page-break-inside: avoid;">   <td rowspan="4" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 44.5pt; padding: 0cm; width: 24.3pt;" width="32">   <div align="center" class="MsoNormal" style="direction: ltr; text-align: center; text-indent: -5.9pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span> </span><b>1.</b></span></div></td>   <td rowspan="4" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 44.5pt; padding: 0cm; width: 72.9pt;" width="97">   <div class="MsoNormal" style="direction: ltr; margin-left: 14.35pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Gas leak</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 44.5pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 31.35pt; text-align: left; text-indent: -21.85pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Packing for sealed part incompletely fitted into groove, and packing   is ruptured.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 44.5pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Replace packing for sealed   part.</span></div></td>  </tr>
<tr style="height: 36.8pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 36.8pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Welded part is defective, and welding material is defective.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 36.8pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Reweld and replace parts.</span></div></td>  </tr>
<tr style="height: 24.55pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 24.55pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Tightening of welded part<span>      </span>insufficient.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 24.55pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Check on tightners.</span></div></td>  </tr>
<tr style="height: 36.6pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 36.6pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: left; text-indent: -20.85pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(4)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Gas density detector malfunctioning.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 36.6pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Readjust or replace gas   density detector.</span></div></td>  </tr>
<tr style="height: 121.85pt; page-break-inside: avoid;">   <td rowspan="5" style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 121.85pt; padding: 0cm; width: 24.3pt;" width="32">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 14.2pt; text-align: center; text-indent: -18.4pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">2.</span></b></div></td>   <td rowspan="5" style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 121.85pt; padding: 0cm; width: 72.9pt;" width="97">   <div class="MsoNormal" style="direction: ltr; margin-left: 14.35pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Air leak</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 121.85pt; padding: 0cm; width: 187.15pt;" width="250">   <div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(1)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Air leak of magnetic valve.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 32.35pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(a)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Valve packing damaged by foreign matter that has infiltrated valve.</span></div><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 75.5pt; text-align: center; text-indent: -24pt; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 32.35pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(b)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Valve seat damaged by foreign matter that has infiltrated valve.</span></div><div align="center" class="MsoNormal" style="direction: ltr; margin-left: 75.5pt; text-align: center; text-indent: -24pt; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 32.35pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(c)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Magnet valve lever broken.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 121.85pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span> </span>(a)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Replace valve <span>   </span></span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span>      </span>packing.Remove <span> </span></span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span>      </span>foreign matter.</span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span> </span>(b) </span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Replace valve <span> </span></span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span>      </span>body.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><br />
</div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span> </span><b>(c)</b> Replace lever.</span></div></td>  </tr>
<tr style="height: 26.75pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 26.75pt; padding: 0cm; width: 187.15pt;" width="250">   <div align="center" class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: center; text-indent: -20.85pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(2)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Air leak from Same as (a)   and (b) above.main valve.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 26.75pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Same as <b>(a)</b> and <b>(b)</b>   above.</span></div></td>  </tr>
<tr style="height: 18.25pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 18.25pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.3pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"><span> </span>(3)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Air leak   from piping system.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 18.25pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Check on tightness.</span></div></td>  </tr>
<tr style="height: 46.6pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1.1pt 1pt medium; height: 46.6pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 28.15pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">(4)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"> Increased amount of air leakage fromairin valve.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 46.6pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;">Measure discharge of airing   valve. If </span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.6pt;">not specified valve, replace airing valve.</span><span style="font-family: Arial; font-size: 11pt; letter-spacing: 1.1pt;"></span></div></td>  </tr>
<tr style="height: 45.55pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1.1pt 4.5pt medium; height: 45.55pt; padding: 0cm; width: 187.15pt;" width="250">   <div class="MsoNormal" style="direction: ltr; margin-left: 26.4pt; text-align: left; text-indent: -16.9pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.6pt;">(5)</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.6pt;"> Others.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 45.55pt; padding: 0cm; width: 138pt;" width="184">   <div class="MsoNormal" style="direction: ltr; margin-left: 7.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Check packing and check on connections. <i><span style="letter-spacing: 0.7pt;"></span></i></span></div></td>  </tr>
</tbody></table></div><br />
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<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; margin-left: auto; margin-right: auto; text-align: left;"><tbody>
<tr style="height: 30.35pt; page-break-inside: avoid;">   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1pt 1pt 4.5pt; height: 30.35pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 54.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.1pt;">Trouble</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 1pt medium; height: 30.35pt; padding: 0cm; width: 150pt;" width="200">   <div align="right" class="MsoNormal" style="direction: ltr; margin-right: 29.9pt; text-align: right; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.1pt;">Possible Causes</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 1pt medium; height: 30.35pt; padding: 0cm; width: 150pt;" width="200">   <div align="right" class="MsoNormal" style="direction: ltr; margin-right: 24.05pt; text-align: right; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.1pt;">Possible Remedial</span></b></div><div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.1pt;">Action</span></b></div></td>  </tr>
<tr style="height: 101.25pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 101.25pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Low insulation Resistance</span></b></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(below 2000 Mega-ohms) between</span></div><div class="MsoBodyTextIndent3">-<span>  </span>Phase   terminal and grounded frame, with breaker closed</div><div class="MsoNormal" style="direction: ltr; margin-left: 24pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">-<span>  </span>Phase terminals of a pole.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 101.25pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Moisture</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Dirty insulation surface <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>  </span>internal and/or external</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Poor oil</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Carbon/copper particles</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 16.3pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">sticking to internal surface</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 101.25pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 14.45pt; text-align: left; text-indent: -14.45pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"><span> </span>-<span>  </span><span style="letter-spacing: 0.4pt;">Circulate dry hot air or oil through the breaker</span>   <span style="letter-spacing: 0.4pt;">pole for 4 to 6 hours.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 15.55pt; text-align: left; text-indent: -13.1pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- </span><span style="font-family: Arial; font-size: 11pt;">Dismantle, clean, reassemble insulation resistance should be above, 2000 Megaohm, for 1.1 kV and above 10,000 megaohms above 36 kV<span style="letter-spacing: 0.4pt;"></span></span></div></td>  </tr>
<tr style="height: 84.45pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 84.45pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Resistance between Terminals of Pole too high</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">(above 100 microhms) (15 microhm per joint) contact</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 84.45pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Reduced contact <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>  </span>pressure</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Loose connections</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Contact surface damaged</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 13.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">due to repeated operations</span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 29.9pt 0.0001pt 6pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Insufficient contact <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-right: 29.9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>    </span>wipe</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Oxide film on contact</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 13.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">surface</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 84.45pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 20.45pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Dismantle, repair and   as </span></div><div class="MsoNormal" style="direction: ltr; margin-left: 15.55pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">semble again. If necessary, replace the contacts</span></div></td>  </tr>
<tr style="height: 107.55pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 107.55pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -7.7pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Unequal contact Wipe</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> andTravel in 3-pole Measured from top surface of interrupter flange   and the contact tip<b> </b>by a simple rod with</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- breaker open</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.3pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- breaker closed</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 107.55pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Contact erosion due to <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>   </span>re-</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 13.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">peated load operations or</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 13.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">short circuit operations</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Unequal length due to <span> </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>   </span>Wrong <span> </span>adjustments <span> </span>of</span></div><div class="MsoNormal" style="direction: ltr; margin-right: 29.9pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"><span>     </span>linkages</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 107.55pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Inspect contact tips</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Replace if badly eroded</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 14.45pt; text-align: left; text-indent: -6pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">- Adjust contact if   lengths are unequal in three pole</span></div></td>  </tr>
<tr style="height: 79.45pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 79.45pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -7.7pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">One of the pole does   not close</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 79.45pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Pull rod   for contact damaged </span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">One the   links of that pole broken.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Contact of   that pole severely damaged</span></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 79.45pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">      </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">dismantle   the pole and repair the defect.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.7pt; text-align: left; unicode-bidi: embed;"><br />
</div></td>  </tr>
<tr style="height: 130.15pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 130.15pt; padding: 0cm; width: 134.25pt;" width="179">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -7.7pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Breaker operation too   slow during opening</span></b><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;"> (Timing from trip command to   contact separation instant too large (60 ms intead of say 40 ms)</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 130.15pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Excessive   friction in the pole unit.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Contact   grip to high.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Trip coil   operation sluggish.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Low battery   voltage, hence higher trip coil pick-up-time</span></span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 130.15pt; padding: 0cm; width: 150pt;" width="200">   <div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Chech   control circuit.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Chech   closing spring visually.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Indentify   the cause and take remedial action</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Check   supply to spring changing motor.</span></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 23.7pt; text-align: left; text-indent: -18pt; unicode-bidi: embed;"><span style="font-size: 11pt; letter-spacing: 0.4pt;"><span>-<span style="font-family: "Times New Roman"; font-size-adjust: none; font-size: 7pt; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: normal; line-height: normal;">        </span></span></span><span dir="LTR"><span style="font-family: Arial; font-size: 11pt; letter-spacing: 0.4pt;">Check   pressure switches, relays, control wiring. </span></span></div></td>  </tr>
</tbody></table><div>  </div><h3 class="post-title entry-title" style="font-weight: normal; text-align: center;"><br />
</h3><div align="center">  <table border="1" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse; border: medium none; margin-left: 1.15pt;"><tbody>
<tr style="height: 31.45pt;">   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext; border-style: double solid solid double; border-width: 4.5pt 1pt 2.25pt 4.5pt; height: 31.45pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">No</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 2.25pt medium; height: 31.45pt; padding: 0cm; width: 85.35pt;" width="114">   <div align="center" class="MsoNormal" style="direction: ltr; margin-right: 32.75pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">ANN Item</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 2.25pt medium; height: 31.45pt; padding: 0cm; width: 84.25pt;" width="112">   <div align="center" class="MsoNormal" style="direction: ltr; margin-right: 22.65pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">Initiation</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double solid solid none; border-width: 4.5pt 1pt 2.25pt medium; height: 31.45pt; padding: 0cm; width: 100.4pt;" width="134">   <div align="center" class="MsoNormal" style="direction: ltr; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">Probable Cause</span></b></div></td>   <td style="-moz-background-clip: border; -moz-background-inline-policy: continuous; -moz-background-origin: padding; background: rgb(217, 217, 217) none repeat scroll 0% 0%; border-color: windowtext windowtext windowtext -moz-use-text-color; border-style: double double solid none; border-width: 4.5pt 4.5pt 2.25pt medium; height: 31.45pt; padding: 0cm; width: 124.8pt;" width="166">   <div align="center" class="MsoNormal" style="direction: ltr; margin-right: 37.1pt; text-align: center; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">Action and/or Countermeasure</span></b></div></td>  </tr>
<tr style="height: 60.4pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 60.4pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 85.35pt;" width="114">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen, transf</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">breaker tripped</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 84.25pt;" width="112">   <div class="MsoNormal" style="direction: ltr; margin: 0cm 22.65pt 0.0001pt 10.15pt; text-align: left; text-indent: -10.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;"><span> </span>1.</span></b><span style="font-family: Arial; font-size: 11pt;"> lock out relay BTG</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; text-indent: -10.15pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"><span> </span><b>2.</b> Pole discrepancy</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 100.4pt;" width="134">   <div align="center" class="MsoNormal" style="direction: ltr; margin-right: 22.65pt; text-align: center; unicode-bidi: embed;"><br />
</div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 60.4pt; padding: 0cm; width: 124.8pt;" width="166">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.95pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Confirm the operated relay(s) by the taget on   P.R.P.</span></div></td>  </tr>
<tr style="height: 60.4pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 60.4pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 85.35pt;" width="114">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen, transf, breaker</span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 32.75pt 0.0001pt 4.2pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">trip circuit unhealthy</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 84.25pt;" width="112">   <div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen. trans.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">breaker. Trip circuit</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">open.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.4pt; padding: 0cm; width: 100.4pt;" width="134">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;">Circuit   breaker gas and/or air pressure</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">low.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;">Failure   of aux, relay circuit.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 60.4pt; padding: 0cm; width: 124.8pt;" width="166">   <div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   gas pressure and /or air pressure.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   the auxiliary relay circuit by circuit tester.</span></div></td>  </tr>
<tr style="height: 60.95pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 60.95pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">3.</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.95pt; padding: 0cm; width: 85.35pt;" width="114">   <div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"><span>  </span>230 kv gen. <span>   </span></span></div><div class="MsoNormal" style="direction: ltr; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"><span>  </span>transf. breaker</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">air and gas- press. Low</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.95pt; padding: 0cm; width: 84.25pt;" width="112">   <div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen. transf.</span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 22.65pt 0.0001pt 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">breaker, 30ACB,</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">30GCB, 30G1</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">operation.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 60.95pt; padding: 0cm; width: 100.4pt;" width="134">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;">Gas   and/or air pressure low.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;"> Gas   and/or air valve fault.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12.15pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">3.</span></b><span style="font-family: Arial; font-size: 11pt;">Fault   of air compressor.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 60.95pt; padding: 0cm; width: 124.8pt;" width="166">   <div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   gas pressure and/or air pressure.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   if any leakage in values and/or piping.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">3.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   the operating condition of air compressor.</span></div></td>  </tr>
<tr style="height: 74.05pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid solid double; border-width: medium 1pt 1pt 4.5pt; height: 74.05pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">4.</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 74.05pt; padding: 0cm; width: 85.35pt;" width="114">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen. transf- BXR</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">pole discrepancy.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 74.05pt; padding: 0cm; width: 84.25pt;" width="112">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen, transf,</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">breaker.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid solid none; border-width: medium 1pt 1pt medium; height: 74.05pt; padding: 0cm; width: 100.4pt;" width="134">   <div class="MsoNormal" style="direction: ltr; margin-left: 18pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;">Circuit   breaker aux. contact failure.</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.85pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;">Timer Tix fault.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double solid none; border-width: medium 4.5pt 1pt medium; height: 74.05pt; padding: 0cm; width: 124.8pt;" width="166">   <div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">1.</span></b><span style="font-family: Arial; font-size: 11pt;"> After   disconnecting the circuit breaker from the</span><span style="font-family: Arial; font-size: 11pt;">system,</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12.65pt; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;"><span>    </span>operate the breaker   and check the circuit by tester.</span><span style="font-family: Arial; font-size: 11pt;"></span></div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -12pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">2.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check   the operating time of the timer.</span></div></td>  </tr>
<tr style="height: 104.3pt; page-break-inside: avoid;">   <td style="border-color: -moz-use-text-color windowtext windowtext; border-style: none solid double double; border-width: medium 1pt 4.5pt 4.5pt; height: 104.3pt; padding: 0cm; width: 31.1pt;" width="41">   <div class="MsoNormal" style="direction: ltr; margin-left: 4.95pt; text-align: left; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;">5.</span></b></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 104.3pt; padding: 0cm; width: 85.35pt;" width="114">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">230 kv gen. transf. BXR</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">incomplete transfer</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 104.3pt; padding: 0cm; width: 84.25pt;" width="112">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">Maintenance</span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 22.65pt 0.0001pt 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">transfer</span></div><div class="MsoNormal" style="direction: ltr; margin: 0cm 22.65pt 0.0001pt 10.15pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">( MTS),</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.75pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">switch circuit.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none solid double none; border-width: medium 1pt 4.5pt medium; height: 104.3pt; padding: 0cm; width: 100.4pt;" width="134">   <div class="MsoNormal" style="direction: ltr; margin-left: 5.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">No change over operator, of MTS switch</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">to final "BUS TIE" position even when</span></div><div class="MsoNormal" style="direction: ltr; margin-left: 5.85pt; text-align: left; unicode-bidi: embed;"><span style="font-family: Arial; font-size: 11pt;">the close of bus tie breaker is completed.</span></div></td>   <td style="border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; border-style: none double double none; border-width: medium 4.5pt 4.5pt medium; height: 104.3pt; padding: 0cm; width: 124.8pt;" width="166">   <div class="MsoBodyTextIndent2"><span> </span><b>1.</b>   Check the MTS switch position as "TRANSFER" and change over it to   "BUS TIE" position to open the breaker being transferred.</div><div class="MsoBodyTextIndent2"><b><span> </span>2.</b>   Check if any looseness in the MTS switch circuit by tester.</div><div class="MsoNormal" style="direction: ltr; margin-left: 18.6pt; text-align: left; text-indent: -17.5pt; unicode-bidi: embed;"><b><span style="font-family: Arial; font-size: 11pt;"><span> </span>3.</span></b><span style="font-family: Arial; font-size: 11pt;"> Check the MTS switch circuit   by tester.</span></div></td>  </tr>
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</h3>

HIGH VOLTAGE CIRCUIT BREAKER PART 2

HIGH VOLTAGE CIRCUIT BREAKER PART 1 PNEUMATIC OPERATING DEVICE (KC – 1043) No. Symptoms Cause Remedy 1. Magnetic valve fails to operate (1) Valve locked a…

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