Answer / Tarang Agarwal

A power transformer is a static device that transfers electrical energy from one circuit to another with a change in voltage. It consists of two or more coils coupled magnetically.

Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

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