ELECTRIC SWITCHING DEVICE Russian patent published in 2005 - IPC

FIELD: electrical engineering, namely switching devices such as circuit breakers, power switches of load, lower-high voltage switches with chop motion of movable contact.

SUBSTANCE: device has one or several poles. Thin-wall electric-current supply system of each chop- type pole with open and axial stationary contacts in the form of combined paired angles being simultaneously terminals of device and their thin-wall holders is mounted on supporting insulators arranged on ground base. Device includes movable contact in the form of trough like contact-parts having their own springs, studs tightening contact springs and pressure nuts and mounted in pairs with use of drive axles at least by one floor on driven ferromagnetic plate. Rotation axle of said ferromagnetic plate is secured to thin walls of contact holder of electric current supply angles of stationary contact. Trough-like contact holders of movable contact have closed plane-oval cross section; working contact surfaces are arranged on flat surfaces at sides adjoined to stationary contacts. Contact springs are arranged inside said plane-oval contour of trough-like contact-parts of movable contact. Studs (bolts) tightening contact springs and respective contact-parts of movable contact have pressure sliding rollers put on outer ends of said studs freely between studs itself and outer walls of trough-like contact-parts of movable contact and pressure nut. Drive axles of each pair of contact-parts of movable contact are rigidly mounted on driven ferromagnetic plate normally relative to it.

EFFECT: enhanced wear-resistance at long time multiple operations.

10 cl, 6 dwg