High voltage circuit breaker

Details High voltage circuit breaker High voltage circuit breaker

H - Electricity

01

H

306/230

H01H 33/91 (2006.01) H01H 33/90 (2006.01)

Patent

CA 1178634

ABSTRACT OF THE DISCLOSURE A high-voltage circuit breaker having a fixed contact and a movable contact also has a piston/cylinder system for generating a queching gas flow to extinguish an arc during a switching action. The piston of the piston/cylinder system is connected to the movable contact. For the purpose of increasing the pressure in the quenching gas flow and for extending the blowing process, an auxiliary piston is provided on the opposite side of the fixed cylin- der wall as the main piston. The auxiliary piston is driven in conjunction with the movable contact and the main piston of the piston/cylinder system in such a manner that it is moved in the first half of the circuit-breaking movement in opposition to the direction of movement of the main piston, and in the second half of the circuit-breaking movement in synchronism with the piston of the piston/cylinder system, into a circuit breaking position. In the first half of the movement the space between the auxiliary piston and the fixed cylinder wall is compressed so that the gas located therein is pushed into the space between the cylinder and the main piston of the piston/cylinder system.

406973

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