electricpy.fault.symrmsfaultcur

electricpy.fault.symrmsfaultcur(V, R, X, t=0.016666666666666666, freq=60)[source]

Symmetrical/RMS Current Calculator.

Function to evaluate the time-constant tau, the symmetrical fault current, and the RMS current for a faulted circuit.

Parameters:

  • V (float) – Voltage magnitude at fault point, not described as line-to-line or line-to-neutral.

  • R (float) – The fault resistance in ohms.

  • X (float) – The fault impedance in ohms.

  • t (float, optional) – The time in seconds.

  • freq (float, optional) – The system frequency in Hz.

Returns:

  • tau (float) – The time-constant tau in seconds.

  • Isym (float) – Symmetrical fault current in amps.

  • Irms (float) – RMS fault current in amps.