electricpy.passive.capbacktoback

electricpy.passive.capbacktoback(C1, C2, Lm, VLN=None, VLL=None)[source]

Back to Back Capacitor Transient Current Calculator.

Function to calculate the maximum current and the frequency of the inrush current of two capacitors connected in parallel when one (energized) capacitor is switched into another (non-engergized) capacitor.

Note

This formula is only valid for three-phase systems.

Parameters:

  • C1 (float) – The capacitance of the

  • VLN (float, exclusive) – The line-to-neutral voltage experienced by any one of the (three) capacitors in the three-phase capacitor bank.

  • VLL (float, exclusive) – The line-to-line voltage experienced by the three-phase capacitor bank.

Returns:

  • imax (float) – Maximum Current Magnitude during Transient

  • ifreq (float) – Transient current frequency