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A section of a gas‐insulated switchgear assembly that is enclosed except for openings necessary for interconnection provides insulating gas isolation from other compartments. A compartment may be designated by the main components in it, for example, circuit breaker compartment, disconnect switch compartment, bus compartment, and so on, as defined in IEEE C37.122.

A compartment of GIS as defined in IEC 62271‐203 as part of a gas‐insulated metal‐enclosed switchgear is totally enclosed, except for openings necessary for interconnection and control.

A compartment may be designated by the main component contained therein, for example, circuit breaker compartment or bus bar compartment.