| 摘要 |
Contact arc-quenching system (CAQS) of power switchgear (PSG) for application in contactors, current non-limiting automatic switches, contactor-automatic switches (air, vacuum or filled with gas, e.g., SF6.) In one basic embodiment CAQS has concentric contacts, round stationary contact 2, a circular moving contact 4 is positioned moving in radial plane; both contacts are placed into an insulation body 1 outside which constant magnets 81, 82 embraced by a clamp 9 of ferro-magnetic material are positioned on the axis of a constant magnet. In another basic embodiment CAQS constant magnets are positioned inside cylindrical contacts, and contact surface of every contact has the shape of a ring (elongated ring) in the rotating body(cylinder) butt end, and both contact surfaces are symmetrical relative to each other. There exist modifications with a contact bridge formed by moving contacts, with positioning of the constant magnet in a cartridge of ferro-magnetic material, with saddle-like constant magnet outside contacts, with current conducting soldered bosses of increased conductivity on contact surfaces.
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