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