Technical requirements for the design, fabrication, testing, and installation of a gas-insulated substation (GIS) are provided. Parameters to be supplied by the purchaser and the technical requirements for the design, fabrication, testing, and installation to be furnished by the manufacturer are discussed. Environmental conditions, general and specific equipment requirements, and a proposal data sheet form are provided to aid the user.

This guide covers the technical requirements for the design, fabrication, testing, installation, and in-service performance of a gas-insulated substation (GIS). The supplier should furnish all equipment and material necessary to provide the complete GIS as shown on the functional one-line diagram, which may consist of circuit breakers (CB), disconnect switches (DS), maintenance ground switches (MGS), fast-acting ground switches (FGS), voltage transformers (VT), current transformers (CT), SF6-to-air bushings, SF6-to-cable termination, buses, cable termination enclosures, transformer or reactor bushing enclosures, enclosed surge arresters, elbows, bellows, controls, cables for control, protection and metering, density monitors, platforms, special tools, and SF6 gas for initial filling. All equipment and material shall be prefabricated, factory assembled, tested, and shipped in the largest practical assemblies. Assembled equipment should be capable of withstanding electrical, mechanical, ...