Answer / sayyid ahamed pm

at the time of opening of cb more current and high voltages are causes to produce high arc due to air and moister are help to produce fire

Answer / mostafaghodrat

vaciuum c.b is advanced.

At the moment arc, and the keying is more effective.
air c.b is more expensive.

What are the types of circuit breakers ?

6 Answers   Genco, Super Max,

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what is the mean of"turbo" in turbo alternator???

1 Answers   CCCL,

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Which standard i will refer for size of earthing conductor for equipment? (Eg:415V Switchgear, MCC, DB shall be 50x6mm GI flat)

1 Answers  

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what happen if power factor goss to above unity (one) ? of any electrical system or motor.

10 Answers   Air Liquide,

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Why we use neutral cable just half from phase cable.Tell me briefly,please.

4 Answers  

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i am getting to neutral earth voltage zero ,is this a perfect earthing ?

3 Answers  

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how to test generator protection rotor earth fault relay and locked rotor test?

1 Answers  

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1 unit or 1 kwh means how much kva

7 Answers   TATA,

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1-What is the difference between absorption factor and polarization factor in insulation resistance test in transformers? and why we inject until ten minutes to get polarization factor?

1 Answers  

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what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

0 Answers  

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what is the value will come when megger the phase to phase ,phase to neutral ,phasae to ground ?

3 Answers  

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what is form factor?

3 Answers  

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