BS EN 50089:1992 PDF

2   Scope

2.1   Type of equipment This standard applies to cast resin partitions pressurized with inert gases, for example sulfur hexafluoride or a mixture of gases such as sulfur 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,