<ul>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Directional Overcurrent and Earth-fault Relays (67, 67N)</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Non-directional Time-delayed Overcurrent Relays (51, 51N)</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Differential Relays (87)</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Buszone relays are not shown in figure 5.1. usually, 11 kV and 66 kV buses are not provided with buszone protection because of economic reasons to be discussed later. But for 132 kV buses and beyond 132 kV, buszone protection will be provided.</span></p>
	</li>
</ul>

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

<p style="text-align:justify"><span style="font-size:14px"><img alt="" src="https://edupmquestionhelp.s3.ap-south-1.amazonaws.com/hint/uploads/images/16194207621619420762.jpg" style="height:1469px; width:800px" />???????</span></p>

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