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how to calculate short ckt current of trafo.
ex.3-ph 3MVA trfo. 11/440, impdence voltage=7.25%
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Answer Posted / annonymous
Fault MVA = 3MVA/0.0725= 41.38MVA
So fault current on 11kV side= 41.38/(1.732x11x0.8)= 2.715kA
fault current on 0.440kV side=41.38/(1.732x.44x0.8)= 67.87kA
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