what is the method to measure the transformer current
carrieng capacity in three phase.



what is the method to measure the transformer current carrieng capacity in three phase...

Answer / deepakindi1

same as u do in for any 3 phase circuits

ie KW=sqrt(3)*V*I*cos(@)

WKT cos(@)=KW/KVA

SO KW/cos(@)=KVA

KVA=sqrt(3)*V*I

I=KVA/sqrt(3)*V

FOR EXAMPLE CONSIDER 11KV/440V 100KVA TRANSFORMER
AT PRIMARY
I=100/sqrt(3)*11
I=100/(1.732*11)
I=5.24A

AT SECONDARY I=100/sqrt(3)*.44
I=100/(1.732*.44)
I=131.24A

Is This Answer Correct ?    7 Yes 4 No

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