What is the difference between air & vaccum circuit breakers?

2 Answers   IOCL,

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Why are calling leading power factor is a capacitive load?

1 Answers  

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Why the power factor of the alternator in power plant is kept .8 lagging. Can't we maintain it at 1.

3 Answers  

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what is meant by impedance & transient protection?

0 Answers  

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what happen if we give square wave instead of sine wave to the transformer

8 Answers  

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After synchronization with grid how to maintain the power factor in lagging or in leading? if lead of lag what is the problem?

3 Answers  

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in three phase with neutral connection, what will happen,if the neutral is in open condition with single phase distribution panel

4 Answers  

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A well system is when , no. of bus bar is less or more. Tell me the concept of it.

0 Answers  

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please can i know about total harmonic distortion and how i can calculate it and if anyone can help me to find any program to help me to calculate THD?? please need it

1 Answers  

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in a dc shunt motor what happens if motor takes high current,no speed

2 Answers  

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cb used in railway applications is?

2 Answers   NTPC,

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why transformer is conneted to dc for polarity test.it doesnt work in dc?

1 Answers   ABB, KVPY,

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