Hydraulic actuator for an electric circuit breaker

Details Hydraulic actuator for an electric circuit breaker Hydraulic actuator for an electric circuit breaker

H - Electricity

01

H

306/208

H01H 3/24 (2006.01)

Patent

CA 1157898

RD-11,110 HYDRAULIC ACTUATOR FOR AN ELECTRIC CIRCUIT BREAKER ABSTRACT OF THE DISCLOSURE This actuator comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely communicates with the breaker-opening space for supplying pressurized fluid thereto during a circuit breaker opening operation. The breaker-opening space and the breaker-closing space space are connected by an impeded flow passage. A pilot valve opens to allow the pressurized liquid in the breaker-closing space to flow to a back chamber of a normally closed main valve to cause the main valve to be opened during a circuit breaker opening operation to release the pressurized liquid from the breaker-closing space. An impeded passage affords communication between the back camber and a sump located on the opposite side of the main valve from the back chamber. The pilot valve and impeded passage allow rapid opening of the main valve with pressurized liquid from the breaker closing side of the piston.

380262

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