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Calculate 3-Phase or 1-Phase
Transformer Short Circuit Current Ampere
Approximation

Find Approximate Short Circuit Ampere of a transformer

Given 15 /22 / 28 MVA Power Transformer, 3 Phase rating and 69 / 12.47 kV voltage
When short circuit happen the voltage recorded is 1 kV on the secondary bus node.

Ampere
=
3 Phase MVA

kV * 1.732


1 MVA = 1,000,000 VA ; 1 kV = 1000 V ; √3 = 1.732
Enter MVA value and kV value no need to do conversion. Answer is in ampere.


FOR SINGLE PHASE, MVA RATED

1 MVA = 1,000,000 VA ; 1 kV = 1000 V ;
Enter MVA value and kV value no need to do conversion. Answer is in ampere.

Ampere
=
1 Phase MVA

kV




FOR 3 PHASE , KVA RATED

1 kVA = 1,000 VA ; √3 = 1.732
Enter kVA value and voltage value no need to do conversion. Answer is in ampere.

Ampere
=
3 Phase kVA

V * 1.732

Go to Transformer MVA rating calculator


FOR 1 PHASE , KVA RATED

1 kVA = 1,000 VA ;
Enter kVA value and voltage value no need to do conversion. Answer is in ampere.

Ampere
=
1 Phase kVA

V

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