Low voltage contactor switch with three-phase contact bank
AssigneeSiemens Aktiengesellschaft
InventorsGuenter Bialkowski, Gerhard Peche
Life of this patent
Estimating the term…
Abstract
A low voltage contactor switch has three simultaneously actuated pairs of contacts each of which consists of a movable and a fixed contact, with contacting occurring in a single evacuated area within a vacuum tube for minimizing oxidation of the contact surfaces and thereby increasing contact life. The contacts are connected to terminals which extend through walls of the vacuum tube in air tight fashion with actuation of the movable contacts being undertaken with the use of an air-sealed bellows. Each contact pair may be individually isolated by a cylinder within the evacuated area surrounding each contact pair as well as by a Y-shaped plate dividing the evacuated area into three chambers.
Claims15
A low voltage contactor switch comprising:
- an evacuated housing;
- three fixed contacts mounted inside said housing;
- a bellows base;
- a bellows interconnected between said bellows base and said housing in air-tight relation;
- three movable contacts respectively mating with said three fixed contacts carried on said bellows base;
- and
- an actuator connected to said bellows base for simultaneously moving said base and said movable contacts,
- whereby electrical making and breaking of said fixed and movable contacts occurs in an evacuated environment for minimizing deterioration of said contacts.
Dependencies are inferred from the claim text.