Answer Posted / pravesh

the mcb is miniature circuit breaker while acb is air
circuit breaker. in both types the difference is between
the arc quenching in mcb there is no mode of arc quenching
at pressure while in acb the arc quenching is done by high
pressure air through air chutes. mcb are not rated for very
high current while the acb are used for high currents

In India the supply voltage is 230 volt A.C. During the negative half cycle phase becomes neutral and neutral become phase? or what will happen during negative half cycle? how the electrons flow during positive and negative half cycle?

1930

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Define rise time.

1069

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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

1866

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What is the direction of current flow in ct secondary...means if the current is flowing from P1 to P2 then what will be the direction of current flow in ct secondaryw

1832

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how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????

2322

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What is tan delta & PPM in transformer? and whats its IS value?

2073

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tan delta equation test on alternators

2155

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relation between power station capacity and voltage level?

1990

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What is meant by vector group

2435

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What happens if we give the supply to the rotor of induction motor and make its terminal shorted?

3956

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How a band pass filter is constructed?

1007

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What is ramp signal?

1048

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What are the operation carried out in thermal power station?

999

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what is the need to express current and voltage in rms value? rms value is also called as effective value,what is effective value?

1894

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Why auxiliary transformers are not connected in parallel in primary stations?

1370

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