**Parameter**;**Datatype**;**Value Range**;**Explanation**
name;string;;name of the impedance
from_bus*;integer;;index of bus where the impedance starts
to_bus*;integer;;index of bus where the impedance ends
rft_pu*;float;:math:`>` 0;resistance of the impedance from 'from' to 'to' bus [p.u]
xft_pu*;float;:math:`>` 0;reactance of the impedance from 'from' to 'to' bus [p.u]
rtf_pu*;float;:math:`>` 0;resistance of the impedance from 'to' to 'from' bus [p.u]
xtf_pu*;float;:math:`>` 0;reactance of the impedance from 'to' to 'from' bus [p.u]
sn_mva*;float;:math:`>` 0;reference apparent power for the impedance per unit values [MVA]
in_service*;boolean;True / False;specifies if the impedance is in service.
