Transformer Fault Rating

Software Version:

Calculate the fault currents for transformers.

Transformer size (kVA)

Number of phases

Impedance (%)

Secondary voltage (Volts)

Full load current (Amps)

Fault current (kA)

Information

Input the transformer size in kVA.
Input the number of transformer output phases, either single phase or three phase.
If required, change the phase to earth output voltage. Nominal output voltage is 250 volts phase to earth, 433 volts phase to phase.
If applicable, specify the transformer is dual ratio. Dual ratio transformers generally have an output rating of 85% compared with standard models.