electricpy.fault.highzvpickup

electricpy.fault.highzvpickup(I, RL, Rct, CTR=1, threephase=False, Ks=1.5, Vstd=400, Kd=0.5)[source]

High Impedance Pickup Setting Function.

Evaluates the voltage pickup setting for a high impedance bus protection system.

Parameters:

  • I (float) – Fault current on primary side (in amps)

  • RL (float) – One-way line resistance in ohms

  • Rct (float) – Current Transformer Resistance in ohms

  • CTR (float, optional) – Current Transformer Ratio, default=1

  • threephase (bool, optional) – Control argument to set the function to evaluate the result for a three-phase fault or unbalanced fault. default=False

  • Ks (float, optional) – Security Factor for secure voltage pickup setting, default=1.5

  • Vstd (float, optional) – C-Class Voltage rating (i.e. C-400), default=400

  • Kd (float, optional) – The dependability factor for dependable voltage pickup setting, default=0.5

Returns:

  • Vsens (float) – The calculated sensetive voltage-pickup.

  • Vdep (float) – The calculated dependable voltage-pickup.