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Transformer LG

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Humble2000

Humble2000

Electrical
Joined
Nov 17, 2005
Messages
132
Location
CA
If the main secondary breaker has ground fault protection, do we still have to protect the transformer shifted curve on delta-solidly grounded wye transformer against phase-ground faults which is shifted to the left?
 
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You have to protect for a ground fault on the source side of the main secondary breaker.
 
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