Short Circuit Current Calculator

Open full page
Inputs
Result
12.6kA

Available fault current is estimated from transformer full-load current divided by total per-unit source impedance.

Full-load current722 A
Transformer Z5.75%
Source Z allowanceIgnored
Fault MVA8.70 MVA
Next checks
  • Select protective equipment with interrupting capacity above the calculated value; next common reference is 18 kA.
  • Final short-circuit study should include upstream utility data, cable impedance, motors, X/R ratio, and applicable IEC 60909 or IEEE method.
Ask VIOX