Answer Posted / k.prakashchandra

Which relay ? SEFR or back -up EFR ? Are the gens connected
to grid ? Whether all the gens trip simultaneously ?
Whenever there is a momentary heavy earth fault in the
outgoing feeder,all the gens trip on back-up EFR with
instantaneous trip indication,though the line does not
trip.So ,it is advised to disable instantaneous fault trip
i.e. high-set of the back-up EFR.

i have done diploma and btech in EE and live in Chandigarh so kindly help me how can i make my competency certificate in my area.

1874

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Vaccum circuit breaker

1024

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Please tell me the earthing procedures adopted for the STAR-STAR 3 Phase transformer in india and give a better sugession for earthing

1608

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1627

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1715

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If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

1079

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2302

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758

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1560

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