electricpy.fault.highzmini¶

electricpy.fault.highzmini(N, Ie, Irly=None, Vset=None, Rrly=2000, Imov=0, CTR=1)[source]¶

Minimum Current for High Impedance Protection Calculator.

Evaluates the minimum pickup current required to cause high-impedance bus protection element pickup.

Parameters:¶

N : int¶

Number of Current Transformers included in scheme

Ie : float¶

The excitation current at the voltage setting

Irly : float, optional¶

The relay current at voltage setting

Vset : float, optional¶

The relay’s voltage pickup setting in volts.

Rrly : float, optional¶

The relay’s internal resistance in ohms, default=2000

Imov : float, optional¶

The overvoltage protection current at the voltage setting. default=0.0

CTR : float, optional¶

Current Transformer Ratio, default=1

Returns:¶

Imin – Minimum current required to cause high-impedance bus protection element pickup.

Return type:¶

float