Answer / bharatgohel5314

CBCT means Core Balance
Current Transformer and it
used for cable protection.

Answer / srinivas

CBCT is Core Balance Current Transformer. it will be having one winding passes over three phases and senses the zero sequence currents there by tripps the circuit through the breaker. its main purpose is to distinguish the earth faults from short circuit faults..i.e its operation depends up on the zero sequence currents that are produced when earth fault occurs.

what does mean for "mah" for mobile batteries like 1500mah,1300mah??

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expansion of rccb

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i need to calculate high voltage line power factor daily basics but there is meter reading kwh and kvah while calculating power factor kwh/kvah formula was right. for examble there is point c=13kwh c=1.8 lag c=1.2 lead and c=14.5kvah like that i know that p.f =kwh/kvah but c=1.8lag kvarh and c=1.2lead kvarh points i dont know if u know please reply

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what is the acceptable earth resistance value ?

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Is there any Electrical supervisor license which gives permit to work whole India rather than individual state??

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WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

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In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase and other end to earth..will the bulb glow or not..if not why?..i'm touching the bulb in star connected side...

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where connected OLTC for transformers?

3 Answers   Apollo, CBRE,

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Advantages of using bundled conductors ?

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How much duration I can keep open the CT if it is under loading condition(100 Amp load)?

3 Answers   Infosys, NTPC, Suzlon,

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

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In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

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