Answer / vengatesh

1.Circuit Breaker
2.Protection relays
3.Fuse(over current protection)
4.Earthing(For drawn the Fault current which is higher than normal voltage)
5.Control panel body earthing(To prevent the body shorts)

Answer / rajendran.m

Earthing system.

Answer / rcq

1. Reverse power relay
2. Reverse kvar relay
3. Overcurrent and eatht fault relay
4. Trip/Lockout relay
5. Differential protection relay

Answer / khajamian

MCB,s MCCB,S .....miniature circuit breaker and mould case
circuit breaker....and various relays..... [protective
relay,current relay, thermal relay..over load relay.. ]etc

Answer / sridhar

(i) SPD(Surge Protection Devives)
(ii) Prevent the Oxiditation by painting
(iii)To choose the Proper Enclosure system

Answer / sb

CT,PT & CB

eddy current losses depends on?(a-max magnetic feild,b-avg magnetic feild,c-on frequency,d-on square of frequency)?

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in dc machines in the armature nature of power is ac but why we take rasistance instead of impedance?

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Why r use in the tap changing x' mer.

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what is cutoff voltage?

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