electricpy.zperlength

electricpy.zperlength(Rd=None, Rself=None, Rac=None, Rgwac=None, De=None, rho='AVG', Ds=None, Dsgw=None, dia_gw=None, Dab=None, Dbc=None, Dca=None, Dagw=None, Dbgw=None, Dcgw=None, resolve=True, freq=60)[source]

Transmission Line Impedance (RL) Calculator.

Simple impedance matrix generator to provide the full impedance per length matrix.

Parameters:

  • Rd (float, optional) – Resistance Rd term in ohms, will be generated automatically if set to None, default=None

  • Rself (float, optional) – Self Resistance term in ohms.

  • Rac (float, optional) – AC resistance in ohms.

  • Rgwac (float, optional) – Ground-Wire AC resistance in ohms.

  • De (float, optional) – De term, in feet, if None provided, and rho parameter is specified, will interpretively be calculated.

  • rho (float, optional) – Earth resistivity in ohm-meters. default=”AVG”

  • Ds (float, optional) – Distance (self) for each phase conductor in feet, commonly known as GMD.

  • Dsgw (float, optional) – Distance (self) for the ground wire conductor in feet, commonly known as GMD.

  • dia_gw (float, optional) – Ground-Wire diameter in feet, may be used to calculate an approximate Dsgw if no Dsgw is provided.

  • Dab (float, optional) – Distance between phases A and B, in feet.

  • Dbc (float, optional) – Distance between phases B and C, in feet.

  • Dca (float, optional) – Distance between phases C and A, in feet.

  • Dagw (float, optional) – Distance between phase A and ground conductor, in feet.

  • Dbgw (float, optional) – Distance between phase B and ground conductor, in feet.

  • Dcgw (float, optional) – Distance between phase C and ground conductor, in feet.

  • resolve (bool, optional) – Control argument to specify whether the resultant ground-wire inclusive per-length impedance matrix should be reduced to a 3x3 equivalent matrix. default=True

  • freq (float, optional) – System frequency in Hertz.