Safety devices in SF6 Circuit Breaker?

1 Answers   DELL,

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Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

3 Answers  

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what is the difference between OD and VL

1 Answers   Bescom,

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why we are used thermistor in motor

1 Answers  

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what is (+) and (-) in generator field detector stand for?

0 Answers  

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If a earth leakage circuit breaker trips is it possible to tell which house circuit breaker (I have four) is the faulty circuit?

1 Answers  

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what is 3rd Harmonics? how it is generated in alternator

2 Answers   Aditya Birla,

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When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?

1 Answers  

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why contactor not provided between output of VFD and motor?

6 Answers   Siemens,

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1.Defination of Graund earth and neutral 2.

8 Answers  

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Why we should use delta connection in primary and star connection in an distribution transformer, which converts 400v a.c. voltage to 33kv.

15 Answers   ABC, Kirloskar, Sify,

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why should the primary of transformer be connected in delta in a heat run test?

0 Answers   Bhel,

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