Answer / janairoad

Control circuit

Answer / ankit

to control the closed circuit..

Answer / k.prakashchandra

You mean 2 contacts are made in series in a MCB? That is to
make doubly sure of opening the circuit.If parallel ,it is
to make closing doubly sure ,as you can expect one of the
contacts to open or close definitely .

hi all, can any one tell me a website or document on basic interview questions on plc for a fresh diploma candidate?

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If single phase supply is 220v. then why three phase supply is 660?

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Whether the vacuum contactor requires Short circuit protection?If No,why?

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