Answer / bandarawy

The normal bias setting in a differential relay is 20%.
So, complete earth fault protection is not possible with
differential relay. That is why you need a seperate earth
fault relay with sensitive settings like 5%.

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?

13 Answers  

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a starter used for squirrel cage induction motor?

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