Answer / waseem aslam

Control circuit wiring of substation refers to wiring of protection relays of transformer with the circuit breaker and wiring of over-current/earth-fault protection relay in the CB, including manual tripping operation.

Answer / k.prakashchandra

The control circuit is for opening and closing on command.

HOW WE CALCULATE CURRENT IF THERE ARE NOT PRESENT ANY AMMETER OR MULTIMMETER??????

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about your self?

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If 440 V supply has given at the secondary winding of transformer at that time if we apply 11 KV at primery then what will happen???????

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Electrical Design specifications

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in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients

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why transformer rating in kva ?

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why open-delta core of 11kv Potential Transformer is 11000v/1.732/110/3?

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