http://www.iec.ch/TC57/CIM#ExcHU.tr
Property cim:ExcHU.tr

type
ObjectProperty
comment
Filter time constant (Tr). If a voltage compensator is used in conjunction with this excitation system model, Tr should be set to 0. Typical Value = 0.01.
domain
cim:ExcHU
range
cim:Seconds
References

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