<p style="text-align:justify"><span style="font-size:14px">The specification heads are written as follows and the usually available specification description is also given as made available by renowned relay manufacturers. </span></p>

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	<p><span style="font-size:14px">Rated Current (I<sub>n</sub>): 1 amp or 5 amp.</span></p>
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</ol>

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

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	<p><span style="font-size:14px">Thermal Withstand Capability:</span></p>
	</li>
</ol>

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

<p style="margin-left:48px; text-align:justify"><span style="font-size:14px">Continuous: 400 % of rated current.</span></p>

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

<p style="margin-left:48px; text-align:justify"><span style="font-size:14px">For 1 sec: 100 times the rated current.</span></p>

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

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	<li style="text-align:justify">
	<p><span style="font-size:14px">Dynamic Current Withstand: 250 times the rated current (half wave value).</span></p>
	</li>
</ol>

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

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	<li style="text-align:justify">
	<p><span style="font-size:14px">Burden: 50 millivolt-amp.</span></p>
	</li>
</ol>

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

<ol start="5">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Rated Frequency: 50 Hz or 60 Hz.</span></p>
	</li>
</ol>

<p style="text-align:justify"><span style="font-size:14px">???????</span></p>

<ol start="6">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Setting Ranges:</span></p>
	</li>
</ol>

<p style="text-align:justify"><span style="font-size:14px">???????</span></p>

<ol start="1" style="list-style-type:lower-roman">
	<li style="text-align:justify"><span style="font-size:14px">Plug-Setting or Sensitivity Threshold or Start Value or Pick-up Value:</span></li>
</ol>

<p style="text-align:justify"><span style="font-size:14px">???????</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Phase Overcurrent Units: 0.05-5 times I<sub>n</sub> in steps of 0.01.</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Ground Overcurrent Units: 0.01-5 times I<sub>n</sub> in steps of 0.005.</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; I&gt;&gt; Setting Range: 0.1-40 times I<sub>n</sub> in steps of 0.01.</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;I&gt;&gt;&gt; Setting Range: 1-40 times I<sub>n</sub> in steps of 0.01.</span></p>

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

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		<ol start="2" style="list-style-type:lower-roman">
			<li style="text-align:justify">
			<p><span style="font-size:14px">Start Value Multiplier: 0.8-10 in steps of 0.1.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">TMS (Time Multiplier Setting): 0.05-15 in steps of 0.05 (for IDMT curves)</span></p>
			</li>
		</ol>
		</li>
	</ol>
	</li>
</ol>

<p style="margin-left:72px; text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Operate Delay Time: 40 milli seconds-200 seconds in steps of 10 milliseconds.</span></p>

<p style="margin-left:72px; text-align:justify"><span style="font-size:14px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This is for definite time overcurrent units.</span></p>

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		<ol start="4" style="list-style-type:lower-roman">
			<li style="text-align:justify">
			<p><span style="font-size:14px">Operating Curve Types:</span></p>
			</li>
		</ol>
		</li>
	</ol>
	</li>
</ol>

<ul>
	<li style="list-style-type:none">
	<ul>
		<li style="list-style-type:none">
		<ul style="list-style-type:square">
			<li style="text-align:justify">
			<p><span style="font-size:14px">Normal Inverse.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Very Inverse.</span></p>
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			<li style="text-align:justify">
			<p><span style="font-size:14px">Extremely Inverse</span></p>
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			<li style="text-align:justify">
			<p><span style="font-size:14px">Moderately Inverse.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Definite Time.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Long Time Inverse.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Programmable Characteristic.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Rarely Inverse</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">RXIDG Type Inverse.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">I squared t type characteristic.</span></p>
			</li>
		</ul>
		</li>
	</ul>
	</li>
</ul>

<p style="margin-left:96px; text-align:justify">&nbsp;</p>

<p style="margin-left:96px; text-align:justify"><span style="font-size:14px">Some of these curves are as per IEC standard, some others are as per ANSI standard whereas some of them are as per IEEE standard.</span></p>

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		<ol start="5" style="list-style-type:lower-roman">
			<li style="text-align:justify">
			<p><span style="font-size:14px">Resetting Time: 0-60 sec in steps of 1 millisecond.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Definite Minimum Operating Time for IDMT Relays: 20 milliseconds-60 sec in steps of 1 millisecond.</span></p>
			</li>
		</ol>
		</li>
	</ol>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Accuracy: Class 7.5 as per IS 3231.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Setting Ranges of Directional Unit:</span></p>

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		<ol style="list-style-type:lower-roman">
			<li style="text-align:justify">
			<p><span style="font-size:14px">Characteristic Angle: - 179<sup>0</sup> to + 180<sup>0</sup> in steps of 1<sup>0</sup>.</span></p>
			</li>
			<li style="text-align:justify">
			<p><span style="font-size:14px">Polarizing Quantity: Usually cross polarization.</span></p>
			</li>
		</ol>
		</li>
	</ol>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Output Contact Rating (Binary Outputs):</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-alpha">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Tripping Contacts:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Rated Voltage: 250 V dc/ac.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Continuous Carry: 5 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Make and carry for 0.5 sec: 30 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Make and carry for 3 sec: 15 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Breaking Capacity: 5 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Contact Material: AgCdO<sub>2</sub>.</span></p>
	</li>
</ol>

<ol start="2" style="list-style-type:lower-alpha">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Signaling Contacts: </span></p>
	</li>
</ol>

<ol style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Rated Voltage: 250 V dc/ac.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Continuous Carry: 5 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Make and carry for 0.5 sec: 10 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Make and carry for 3 sec: 8 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Breaking Capacity: 1 amp.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Contact Material: AgCdO<sub>2</sub>.</span></p>
	</li>
</ol>

<ol start="10">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Binary Inputs: User can ask as per requirement. As many as 16 binary inputs are provided by manufacturers. These binary inputs can be used for many purposes such as blocking certain protection function, remote reset, changing setting group etc. Control voltage level is usually 110/220 V d. c.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Power Supply: 80-265 V ac/dc.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Tests:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Dielectric Tests:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-alpha">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Power frequency overvoltage withstand test (IEC 255-5): 2 kV for 1 minute.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Impulse withstand test (IEC 255-5): 5 kV, 1.2/50 microsecond.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Insulation Resistance (IEC 255-5): More than 100 Megaohms at 500 V d. c.</span></p>
	</li>
</ol>

<ol start="2" style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Disturbance Tests:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-alpha">
	<li style="text-align:justify">
	<p><span style="font-size:14px">High frequency interference test.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Electrostatic discharge test.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Electromagnetic field test.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Magnetic field test.</span></p>
	</li>
</ol>

<ol start="3" style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Mechanical Tests:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-alpha">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Seismic Tests.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Vibration Test.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Shock Test.</span></p>
	</li>
</ol>

<ol start="13">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Environmental Conditions:</span></p>
	</li>
</ol>

<ol style="list-style-type:lower-roman">
	<li style="text-align:justify">
	<p><span style="font-size:14px">Specified Ambient Service Temperature Range: -10 to + 55<sup>0</sup> C.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Transport and storage Temperature range: - 40 to + 70<sup>0</sup> C.</span></p>
	</li>
	<li style="text-align:justify">
	<p><span style="font-size:14px">Enclosure Protection according to IEC 529, when the relay is panel mounted: IP 54.</span></p>
	</li>
</ol>