<p style="text-align:justify"><img alt="" src="https://edupmquestionhelp.s3.ap-south-1.amazonaws.com/hint/uploads/images/16257477061625747706.jpg" style="height:1011px; width:800px" /></p>

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

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

<p style="text-align:justify"><span style="font-size:14px">Figure 7.44 shows a single line diagram of a ring network. The breaking capacities of breakers are as follows:</span></p>

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

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

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

<table cellspacing="0" class="MsoTableGrid" style="border-collapse:collapse; border:none; margin-left:170px; width:900px">
	<caption>
	<p><span style="font-size:14px"><strong>Table 7.20: Symmetrical Breaking Capacities of Breakers</strong></span></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:155px">
			<div style="text-align:center"><span style="font-size:28px">Circuit Breakers</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:167px">
			<div style="text-align:center"><span style="font-size:28px">Breaking Capacity (MVA)</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:155px">
			<div style="text-align:center"><span style="font-size:28px">1, 2</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:167px">
			<div style="text-align:center"><span style="font-size:28px">3000</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:155px">
			<div style="text-align:center"><span style="font-size:28px">3, 4, 5, 6</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:167px">
			<div style="text-align:center"><span style="font-size:28px">1500</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:155px">
			<div style="text-align:center"><span style="font-size:28px">7, 8</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:167px">
			<div style="text-align:center"><span style="font-size:28px">1300</span></div>
			</td>
		</tr>
	</tbody>
</table>

<p style="margin-left:48px; text-align:justify">&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">The relays used are directional or non-directional (as the requirement calls for) normal inverse IDMT overcurrent relays. The plug-settings of the phase relays are tabulated below:</span></p>

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

<table cellspacing="0" class="MsoTableGrid" style="border-collapse:collapse; border:none; margin-left:160px; width:900px">
	<caption>
	<p><strong><span style="font-size:18px">Table 7.21: Plug-Settings of Phase Relays in % of 1 amp</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:164px">
			<div style="text-align:center"><span style="font-size:28px">Relays</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:185px">
			<div style="text-align:center"><span style="font-size:28px">Plug-Setting in % of 1 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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>1</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">100</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>2</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">100</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>3</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">50</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>4</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">100</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>5</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">50</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>6</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">100</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>7</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">75</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:164px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>8</sub></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:185px">
			<div style="text-align:center"><span style="font-size:28px">75</span></div>
			</td>
		</tr>
	</tbody>
</table>

<p style="margin-left:48px; text-align:justify">&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 relays R<sub>3</sub> and R<sub>5</sub> are set at 0.1. TMS of phase relays R<sub>6</sub>/R<sub>4</sub> shall be set at</strong></span></p>