http://www.iec.ch/TC57/CIM#TapChangerInfo.bil
Property cim:TapChangerInfo.bil

type
ObjectProperty
comment
Basic Insulation Level (BIL) expressed as the impulse crest voltage of a nominal wave, typically 1.2 X 50 microsecond. This is a measure of the ability of the insulation to withstand very high voltage surges.
domain
cim:TapChangerInfo
range
cim:Voltage
References

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