<p style="text-align:justify"><img alt="" src="https://edupmquestionhelp.s3.ap-south-1.amazonaws.com/hint/uploads/images/16256595041625659504.jpg" style="height:537px; width:800px" /></p>

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<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Figure 7.39 shows a single line diagram of portion of a power system network. Relays R<sub>1</sub>, R<sub>2</sub> and R<sub>3</sub> are normal inverse IDMT relays. The maximum load current passing through different transmission lines is shown in the figure. The fault currents for faults at different buses are tabulated in table below:</span></p>

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<p style="margin-left:48px; text-align:center">&nbsp;</p>

<table cellspacing="0" class="MsoTableGrid" style="border-collapse:collapse; border:none; margin-left:151px; width:900px">
	<caption>
	<p><strong><span style="font-size:18px">Table 7.16: Fault Currents at Different Buses</span></strong></p>
	</caption>
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:81px">
			<div style="text-align:center"><span style="font-size:28px">Bus</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:164px">
			<div style="text-align:center"><span style="font-size:28px">Fault Current for Triple Line Fault in Amp</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:161px">
			<div style="text-align:center"><span style="font-size:28px">Fault Current for Double Line Fault in Amp</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:81px">
			<div style="text-align:center"><span style="font-size:28px">A</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:164px">
			<div style="text-align:center"><span style="font-size:28px">4860</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:161px">
			<div style="text-align:center"><span style="font-size:28px">4208</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:81px">
			<div style="text-align:center"><span style="font-size:28px">B</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:164px">
			<div style="text-align:center"><span style="font-size:28px">3220</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:161px">
			<div style="text-align:center"><span style="font-size:28px">2788</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:81px">
			<div style="text-align:center"><span style="font-size:28px">C</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:164px">
			<div style="text-align:center"><span style="font-size:28px">2408</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:161px">
			<div style="text-align:center"><span style="font-size:28px">2085</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:81px">
			<div style="text-align:center"><span style="font-size:28px">D</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:164px">
			<div style="text-align:center"><span style="font-size:28px">1922</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:161px">
			<div style="text-align:center"><span style="font-size:28px">1665</span></div>
			</td>
		</tr>
	</tbody>
</table>

<p style="margin-left:48px; text-align:center">&nbsp;</p>

<p style="margin-left:48px; text-align:justify">&nbsp;</p>

<p style="margin-left:48px; text-align:justify"><span style="font-size:14px"><strong>TMS of relay R<sub>3</sub> is set at 0.1. Allow 10 % overload while deciding plug-setting of all relays. TMS of phase relay R<sub>2</sub> will be set at</strong></span></p>

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<p style="margin-left:168px; text-align:justify">&nbsp;</p>