<ul>
	<li style="text-align:justify">
	<p><span style="font-size:14px">It can be single input relay such as an overcurrent relay, overvoltage relay, undervoltage relay, underfrequency relay etc.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">It can be two input or multi-input relay such as differential relay, directional relay, distance relay etc.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">The protective relays can also be classified w. r. t. the functions they perform such as overcurrent relay, distance relay, over-fluxing relay, thermal relay, reverse power relay etc.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Classification can also be made according to the time of operation of relays such as&nbsp; instantaneous relays, definite time relays, inverse current-time relays etc.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Special function relays like tripping relays, alarm relays, trip circuit supervision relays etc.</span></p>
	</li>
</ul>

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