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WHY IS RESTRICTED EARTH FUALT PROTECTION NEEDED?? WHY CANT
DEIFFERENTIAL PROTECTION SUFFICE???
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Answer Posted / jai s s
Differntial protection is only use to protect winding
internal faults, It may be used in Generator or
transformer, it protect the paritcular inbetween zone while
we placed CT's. REF protection always used at star winding
side to protect nearby winding of star point which we can
not protect by residual earth fault.
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