BS EN 50089:2022

High-Voltage switchgear and controlgear. Insulating pressurised partitions for gas filled metal enclosures. | Status: Current

1 Scope This document applies to pressurized partitions used in indoor and outdoor installations of high-voltage AC and DC switchgear and controlgear with rated voltages (Ur) above 1 kV AC / 1,5 kV DC and with design pressure higher than 300 kPa, where the gas is used principally for its dielectric and/or arc-quenching properties. 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 arresters;
• — busbars and connections;
• — cable connections/terminations;
• — cable bushings.

Partitions which are only pressurized from one side are also covered. 1 kV AC / 1,5 kV DC means it is valid for the apparatus applied and where the partitions are installed; however, the application of voltages below 1 kV AC / 1,5 kV DC as in, for example, current and voltage transformers are not excluded. This document does not apply to high voltage bushings (see EN 60137, EN 61462 and EN 62155).