electricpy.fault.three_phase_fault

electricpy.fault.three_phase_fault(Vth, Zseq, Rf=0, sequence=True, reference='A')[source]

Three-Phase Fault Calculator.

This function will evaluate the Zero, Positive, and Negative sequence currents for a three-phase fault.

\[I_1 = \frac{V_{th}}{Z_1+R_1}\]
\[I_2 = 0\]
\[I_0 = 0\]
Parameters:

  • Vth (complex) – The Thevenin-Equivalent-Voltage

  • Zseq (list of complex) – Tupple of sequence reactances as (Z0, Z1, Z2)

  • Rf (complex, optional) – The fault resistance, default=0

  • sequence (bool, optional) – Control argument to force return into symmetrical- or phase-domain values.

  • reference ({'A', 'B', 'C'}) – Single character denoting the reference, default=’A’

Returns:

Ifault – The Fault Current, equal for 0, pos., and neg. seq.

Return type:

list of complex