This standard establishes ratings and requirements for planning, deesign, testing, installation, and operation of gas insulated substatins (GIS) for alternating current applicaitons using equipment rated above 52 kV. Typical installations are assemblies of specialized gas insualted devices such as circuit breakers, switches, bushings, buses, instrumentation, and gas insulating system. It does not include certain items that may be directly connected to gas insulated substations, such as power transformers and protective relaying.
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