FLA = Full Load Amperes
I S.C. = Short Circuit Current
AFC = Available Fault Current
AIC = Amps Interrupting Capacity
kVA = Kilovolt-Amperes
E = Voltage, Line to Line
Z = Percent Impedance
Three Phase Calculations:
(KVA X 1000) / (E L-L X 1.732) = Three ø, FLA
FLA / Z = I S.C.
Single Phase Calculations:
(KVA X 1000) / E L-L = Single ø, FLA
FLA / Z = I S.C.
kVA
Voltage (E)
Impedance (Z)
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Reference: Cooper Bussman Short Circuit Calculations PDF
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