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I decided to provide a 11KV / 440V Xformer in my Substaion.
What are the protection required for that?
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Answer Posted / doli tomar
11000/440v means it is step-down transformer.so, for MV
side use 9kv LA,11 kvDO-FUSE and switch gear panel which
includes VCB which is used for isolating the transformer
during maintenance period.For LV side use 4P ACB /MCCB for
3-
phase bus bar(R,Y,B) and use overcurrent, overvoltage,
undervoltage,IDMT,Single phase preventer,restricted earth
fault relay because Relays are used where it is necessary
to control a circuit by a low-power signal (with complete
electrical isolation between control and controlled
circuits), or where several circuits must be controlled by
one signal.
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