http://www.iec.ch/TC57/CIM#EquivalentBranch.r21
Property cim:EquivalentBranch.r21

type
ObjectProperty
comment
Resistance from terminal sequence 2 to terminal sequence 1 .Used for steady state power flow. This attribute is optional and represent unbalanced network such as off-nominal phase shifter. If only EquivalentBranch.r is given, then EquivalentBranch.r21 is assumed equal to EquivalentBranch.r. Usage rule : EquivalentBranch is a result of network reduction prior to the data exchange.
domain
cim:EquivalentBranch
range
cim:Resistance
References

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