Abstract: A bushing for high-voltage and medium-voltage gas-insulated metal-clad electrical switchgear includes a substantially cylindrical metal jacket surrounding a conductive busbar. It also includes a conductive material annular member disposed around the jacket and a cap surrounding the jacket at a distance and adapted to define with the jacket a closed space delimited at one end by the annular member, which is adapted to be sacrificed by being partly melted if an internal arc pierces the jacket and reaches it. This kind of bushing prevents molten metal and hot gases from spraying out following an internal arc.

Abstract: The gas insulated electrical gear includes at least one tank which is filled with a dielectric, gas and which is provided with a rupture disk which ruptures in the event of the dielectric gas in the tank reaching an excessive pressure so as to allow the gas to be exhausted from the tank. The rupture disk is protected against attack from the environment outside the tank by being placed inside the enclosed cabinet having an atmosphere in which temperature and humidity are controlled. The cabinet can be the low voltage and/or mechanical control supporting cabinet fitted to the electrical gear.

Abstract: A bushing for high-voltage and medium-voltage gas-insulated metal-clad electrical switchgear includes a substantially cylindrical metal jacket surrounding a conductive busbar. It also includes a conductive material annular member disposed around the jacket and a cap surrounding the jacket at a distance and adapted to define with the jacket a closed space delimited at one end by the annular member, which is adapted to be sacrificed by being partly melted if an internal arc pierces the jacket and reaches it. This kind of bushing prevents molten metal and hot gases from spraying out following an internal arc.

Abstract: The gas insulated electrical gear comprises at least one tank which is filled with a dielectric gas and which is provided with a rupture disk which ruptures in the event of the dielectric gas in the tank reaching an excessive pressure so as to allow the gas to be exhausted from the tank. The rupture disk is protected against attack from the environment outside the tank by being placed inside the enclosed cabinet having an atmosphere in which temperature and humidity are controlled. The cabinet can be the low voltage and/or mechanical control supporting cabinet fitted to said electrical gear.