Hydraulic actuator for an electric circuit breaker

Patent · Fri Dec 31 23:00:00 EST 1982

OSTI ID:864557

Imam, Imdad ^[1]

---

1. Colonie, NY

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 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 chamber 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.

• Research Organization: General Electric Co
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: EX-76-C-01-2065
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 4384182
• OSTI ID: 864557
• Country of Publication: United States
• Language: English

Related Subjects

/200/218/
accumulator
accumulator freely
actuator
affords
allow
allow rapid
breaker
breaker-closing
breaker-closing space
breaker-opening
breaker-opening space
chamber
circuit
circuit breaker
closed
closing
communicates
communication
comprises
connected
electric
electric circuit
flow
flow passage
fluid
fluid motor
freely
freely communicates
hydraulic
hydraulic actuator
impeded
liquid
located
main
motor
normally
normally close
normally closed
operation
opposite
passage
pilot
pilot valve
piston
pressurized
pressurized fluid
pressurized liquid
rapid
release
space
sump
supplying
supplying pressurized
thereto
valve