Answer Posted / monti

rccb:-it measures the difference in current between live
and neautral conductors of a system.in normal conditions it
is equal.If it is diff. than it indicates that some current
is flowing other than live and neutral
Elcb;-it measures the voltage on earth conductor.If this
voltage is not zero that indiacate a leakage to earth

If one lamp connects between two phases it will glow or not?

1087

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all interview questions with answers of ntpc (2000-2009

2209

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Why armature rheostat is kept in maximum position?

1098

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A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

5259

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How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.

1742

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BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

2322

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can we use trip light with bus coupler?

1931

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What do you understand by avr?

1043

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Define bibo stability.

1069

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How to calculate the volumetric capacity of a oxygen & Nitrogen gas Cylinder if pressure is 145 kg/cm2 & water capacity of cylinder is 67 liters.

2180

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What is EHT tariff or Power factor Tariff ????

2337

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Please give me a erda placement paper

1789

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What do you mean by reach and reach the point of the relay?

1256

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sir, what is the importance of Fault MVA. how to calculate fault mva of 33kv substation connected by 6.5 km line(single circuit with equal spacing) with 110/11kv transformer in 110kv susbstation.the fault mva on 11 kv bus in 110kv susbstation is 208mva.

2947

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How many types are using in 220kv/400 kv swith yard

2184

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