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GIS Distributor for 121kv

GIS Distributor for 121kv

For circuit break- ers rated 72.5 kV and above that are to be used on Gas Insulated Substations (GIs) ANSI specifies two BIL levels. IEC, in contrast, specifies two BIL ratings for all voltage classes except for 48.3 and 72.5 kV, and for all circuit breakers rated above 100 kV, except for the 245 kV rating where three values are specified.

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