Answer Posted / vijay mali

Generally the operating time of the circuit breakers
depends on the designer. The opening time of the breaker
should be less than the closing of the breaker. Opening
time should be less than or equal to 20msec (preferrable).
Closing time depends but preferrably less than 90msec

how does high earth to neutral voltage affects electronic circuit?

1937

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What is control system?

1192

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I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

1665

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What do you mean by passive circuit elements and why these are called passive?

1172

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When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1888

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Explain the different regions in frequency response?

1069

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3931

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2214

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please anybody help me to find out the BHEL trainee Exam previous year questions papers . if u ve pls. send it to surekhared@gmail.com

1942

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What is the ratio of Booster transformer?

2152

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what is the formula to calculate voltage drop/loss on 66KV Transmission Line?

3679

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In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

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2622

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why should small green grass ans small plant should not be there inside the transformer Yard in the factories

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