scope:

This standard applies to cast resin partitions pressurized with inert gases, for example sulphur hexafluoride or a mixture of gases such as sulphur hexafluoride and nitrogen used in indoor or outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc-quenching properties, with rated voltages - 1 kV and up to and including 52 kV and with gas-filled compartments with design pressure greater than 3 bar (gauge) - and with rated voltage 72,5 kV and above. The partitions comprise pressurized barriers in electrical equipment not necessarily limited to the following examples: Circuit Breakers, Switch Disconnectors, Disconnectors, Earthing Switches, Current Transformers, Voltage Transformers, Surge Arrestors, Busbars and Connections, Cable Connections.