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Motor Protection Numerical Relay, you have a separate numerical relay for LV motor&HTmotor.
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SNSwamy
post Feb 11 2008, 05:55 PM
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you have separate numerical relay for LV motor &HT motor.Can you use the LV motor numerical relay for HT motor protection without any modificationHT motor protection


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spkam
post Mar 21 2008, 05:09 PM
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I dont see any difference b/w LT and HT motor protection. I think same relay can be used

following to be considered


a) If u use the low imp. scheme for earth fault then u may have to recalculate the stabilizing resistor value

cool.gif Revision of the protection settings as per HT motor char. , fault currents at the bus

c) CT PT ration as per the new set up



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