UA50246U - High-voltage vacuum circuit breaker - Google Patents

Abstract

A high-voltage circuit breaker comprises a case, poles fixed in the case, which have vacuum arc-quenching chambers, inside each of which fixed and movable contacts are located, last of which is connected to a traction insulator provided with adjusting springs, and also comprises mounted inside the case electromagnetic drives, each of which located coaxially to poles and connected to the traction insulator of the corresponding pole, and disconnection springs, a control unit and manual disconnection mechanism, which are connected to electromagnetic drives. Each electromagnetic drive comprises fixed and movable portions of the magnetic core, a coil and a constant magnet. Movable portion of the magnetic core comprises a stock, opposite ends of which connected to an armature and the traction insulator of the corresponding pole; electromagnetic drives are connected to one another via a synchronizing shaft connected to stocks of movable portion of the magnetic core. Disconnection springs are located between electromagnetic drives and connected to movable portions of the magnetic core. Fixed portion of the magnetic core comprises a ring-shaped case and coaxially located inside the case a core having a central hole and a ring projection in the upper part of thereof. The coil is fixed between the case and the core under the marked ring projection and form a gap between the last and inside surface of the case, the constant magnet is located in the marked gap under the coil on the external surface of the ring projections of the core. The stock is located in central hole of the core, the armature is made disc-shaped.