Answer / gunasekaran

if we connect at both end circulating current will flow so
Armour getting heated up if and then it will tripping for
earth fault protection.

Answer / felixraj

only signal cables should earthed at one end. HT cables can.

Answer / ajit rath

If we connect both end to earth then potentional difference
will high & more circullating current will flow .

Answer / vinod

HT cable earthing only sending end, Why because in case of
earth fault relay pick up with minimum leakage.

Answer / j.kesavan

ht cables not connect earth propely current flowing through
the armours cable get more temp, thats why not connect earth

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dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?

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