This part of IEC 62271 specifies requirements for gas-insulated metal-enclosed switchgear in
which the insulation is obtained, at least partly, by an insulating gas other than air at
atmospheric pressure, for alternating current of rated voltages above 52 kV, for indoor and
outdoor installation, and for service frequencies up to and including 60 Hz.
For the purpose of this standard, the terms “GIS” and “switchgear” are used for “gas-insulated
metal-enclosed switchgear”.
The gas-insulated metal-enclosed switchgear covered by this standard consists of individual
components intended to be directly connected together and able to operate only in this manner.
This standard completes and amends, if necessary, the various relevant standards applying to
the individual components constituting GIS.