Electrical Engineering Interview Questions
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I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

2 3912

WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?

ABB, Nissi Engineering Solution, NSL Sugars,

5 19374

what is the function of CRGO in a Transformer?

6 6494




what happens when a DC supply is given to AC motor?

Areva, ISMT,

9 15837

what is the difference between elcb,rccb,mcb.

HCL, RCCB,

8 33431

I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?

1 1592

how we masure a cuurrent?

5 2844

when we increased the current what do ?

754




how we calculate the dick for a pole?

Power Grid,

732

name the types of insulatter?

5 4419

what is the principal of star delta starter?

9 39621

HOW TO BUILD THE SINGLE PHASE TO THREE PHASE CONVERTER? CAN PROVIDE ME CIRCUIT..THANKS

870

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

Jindal,

1033

Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

Accenture,

782

How to calculate the current rating of power cables ?

1 4611


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922


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