BASIC THEORY OF TRANSFORMERS

<div dir="ltr" style="text-align: left;" trbidi="on"> <div dir="ltr" style="text-align: left;" trbidi="on"> <div style="text-align: justify;"> <div style="background-color: white; text-align: center;"> <span style="background-color: red; font-size: large;">INTRODUCTION </span></div> <br /> 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 /> <br /> 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 /> <br /> The transformer interconnects and transfers power between systems at different voltages. It does this at very high efficiency, at 99% or higher.<br /> <br /> Transformers in power stations are generally three phase and double wound, i.e. they have electrically separate primary and secondary windings<br /> <br /> <div style="text-align: center;"> <span style="font-size: large;"><span style="background-color: yellow; color: red;">BASIC THEORY OF TRANSFORMERS</span></span></div> </div> <div style="background-color: white; text-align: justify;"> </div> <div style="text-align: justify;"> <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 /> <br /> <div style="text-align: center;"> <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> <span style="font-size: large;"><span style="color: black; font-size: small;"><span style="background-color: white;"></span></span></span><br /> <div style="text-align: center;"> <span style="background-color: orange; color: red;">Fig. 1.1. Ideal transformer</span></div> <br /> In an ideal transformer, there are no losses in the core and the windings have no resistance or leakage reactance.<br /> <br /> 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 /> <br /> e1 = N1 x change in flux <br /> <br /> or e1  =  N1  x change in flux /  change in t    ( 1 )<br /> <br /> <br /> 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 /> <br /> e2 = N2 x change in flux  ( 2 )<br /> <br /> where N2 is the number of secondary turns.<br /> <br /> 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 /> <br /> where    </div> <div style="text-align: justify;"> </div> <div style="text-align: justify;"> 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 /> <br /> In an ideal transformers, the losses which are normally small are ignored, and then<br /> <br /> V1 / V2  =  N1 / N2 = I2 / I1      ( 4 )<br /> <br /> This important relationship must be clearly understood and memorized.<br /> <br /> <div style="text-align: justify;"> <span style="background-color: yellow; color: red; font-size: small;">The operation of the transformer can be summarized as follows:</span></div> <br /> 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 /> <br /> 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 /> <br /> <br /> <br /> <br /> <br /></div> </div> </div> <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 ...

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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 /> <br /> <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 /> <br /> <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, thetransformer 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 /> <br /> <br /> <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> </tbody></table>

TROUBLESHOOTING OF TRANSFORMER

TROUBLE SHOOTING OF TRANSFORMER TROUBLE SHOOTING OF TRANSFORMER NO. TROUBLES CAUSE ACTION 1 Stop of transforme...

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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 /> </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;">     <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 /> </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;">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> </tbody></table>

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)  ...

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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 /> </span></div><div style="background-color: white; color: red; text-align: center;"><span style="font-size: small;"><br /> </span></div><div style="background-color: white; color: red; text-align: center;"><span style="font-size: small;"><br /> </span></div><div style="background-color: white; color: red; text-align: center;"><span style="font-size: small;"><br /> </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 /> <br /> <br /> <br /> <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> </tbody></table></div><h3 class="post-title entry-title" style="font-weight: normal; text-align: center;"><br /> </h3><h3 class="post-title entry-title" style="font-weight: normal; text-align: center;"><br /> </h3>

HIGH VOLTAGE CIRCUIT BREAKER PART 2

HIGH VOLTAGE CIRCUIT BREAKER PART 1   PNEUMATIC OPERATING DEVICE (KC – 1043)  No. Symptoms Cause Remedy ...

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