BS EN 50089:1992

Specification for cast resin partitions for metal-enclosed gas-filled high-voltage switchgear and controlgear. | Status: Superseded, Withdrawn

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,
• busbars and connections,
• cable connections.

This standard does not apply to high-voltage bushings (see HD 358 S3 (IEC 517)).