Hermetically sealed vacuum load interrupter switch with flashover features
AssigneeElektrotechnische Weke Fritz Driescher & Sohne GmbH
InventorVitus Hogl
Life of this patent
Estimating the term…
Abstract
A load interrupter switch for voltages in the kV range and having a vacuum interrupter chamber which is embraced without any air gaps by a sleeve formed from elastomeric material of high dielectric strength. The sleeve is clamped by half housings of the load interrupter switch. In this way, an external flashover of the high voltage between the end plates of the vacuum interrupter chamber is effectively suppressed during the switching operation without the need for liquid or gaseous media for this purpose. As a result, unlike conventional load interrupter switches there is no need for an extensive level of monitoring. Furthermore, the load interrupter switch does not pose the risk of leaking unobjectionable fluids or gases which may cause environmental hazards.
Claims10
A load interrupter switch for voltages above 1 kV, comprising:
- a vacuum interrupter chamber comprising:
- a movable contact;
- an inner housing having metallic end plates, wherein the movable contact is adjacent to at least one of the metallic end plates;
- and
- a cylindrical housing middle part sealed inside the inner housing, the cylindrical housing middle part formed from electrically insulating material;
- a switching mechanism for opening and closing the movable contact;
- a sleeve formed from an elastomeric material of high dielectric strength arranged around the vacuum interrupter chamber and gripping edges of the metallic end plates;
- and
- a pressure housing having a pressure contact against the sleeve and forming a jacket of complementary construction around the sleeve, wherein the sleeve prevents continuous air gaps between the metallic end plates.
The load interrupter switch according to 1, wherein at least one pocket is formed on the sleeve in a region near at least one of the metallic end plates.
Dependencies are inferred from the claim text.