I have a situation to design sub-Distribution board/Panel meant for feeding power sockets. In the incomer CAN i Take TP MCCB with Neutral Link and All the outgoing feeders with to sockets with TP MCCB and Neutral Link? P.S : My System is IT Earthing

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1.what is the difference between ct and cvt? 2.what is the difference between pt and cvt? 3.what is the difference between relays and circuit breakers?

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how to calculate a cable size while load is given in amp or kw and length is also define.?

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a 11 kv line is grounded and a 110 kv line is grounded. which line have the greater current flow?

4 Answers  

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what is a starter ??

2 Answers   NPTC,

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What is a commutator?

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While connecting the flood light plug on to the 415 V distribution panel,there was spark and the cable got burnt. Three ignitors of the flood light also burnt of. The lamps are of 400 W (total 6 lamps) connected through 1.5 mm2 cable. The plug was immediately removed from the circuit. There was a 30 mA RCD connected and a 250 A MCCB; however both did not trip. What could be the possible reasons for the circuit devices not to trip?Can someone assist please. Additional info if needed can be provided.

2 Answers  

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I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

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practicalLY what is impedence ...?

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1.What is wind span ,wight span and normal span, and what is the difference for 132kv transmission .

1 Answers   PKR,

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how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

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difference between ordinary MCCB & Motorised MCCB

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