VACUUM CONTACTOR Russian patent published in 2009 - IPC H01H33/666 

FIELD: electrical engineering.

SUBSTANCE: invention relates to LV and HV electrical hardware and can be used in remote control circuitry. Proposed contactor comprises, preferably, three vacuum arc-extinguishing chambers, electromagnet, casing, insulating lever with electromagnet armature, insulating lever axle, yoke, opening spring, lever stroke limiter and set of auxiliary contacts furnished with a push-button. In compliance with this invention, it is furnished with additional lever arranged on the housing to turn thereabout. Longer arm of additional lever interacts with insulating lever, while its shorter arm acts on auxiliary contact unit push-button. Ratio of auxiliary lever short arm-to-its long arm equals the ration of auxiliary contact set button-to-insulating lever stroke at the point of interaction with auxiliary lever. Auxiliary lever can have positive camber on the side of interaction with auxiliary contact set button.

EFFECT: higher reliability and longer life.

2 cl, 4 dwg