Hydraulically-activated operating system for an electric circuit breaker

Patent · Sun Dec 31 23:00:00 EST 1978

OSTI ID:863416

Imam, Imdad ^[1]; Barkan, Philip ^[2]

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1. Secane, PA
2. Stanford, CA

This operating system 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. A normally-closed valve located on the breaker-closing-side of the piston is openable to release liquid from the breaker-closing space so that pressurized liquid in the breaker-opening space can drive the piston in an opening direction. Means is provided for restoring the valve to its closed position following the circuit-breaker opening operation. An impeded passage affords communication between the accumulator and the breaker-closing space to allow pressurized liquid to flow from the accumulator to the breaker-closing space and develop a pressure therein substantially equal to accumulator pressure when the valve is restored to closed position following breaker-opening. This passage is so impeded that the flow therethrough from the accumulator into the breaker-closing space is sufficiently low during initial opening motion of the piston through a substantial portion of its opening stroke as to avoid interference with said initial opening motion of the piston.

• DOE Contract Number: EX-76-C-01-2065
• Assignee: General Electric Company (Philadelphia, PA)
• Patent Number(s): US 4166937
• OSTI ID: 863416
• Country of Publication: United States
• Language: English

Related Subjects

/200/218/
accumulator
accumulator freely
affords
allow
allow pressurized
avoid
breaker
breaker-closing
breaker-closing space
breaker-closing-side
breaker-opening
breaker-opening space
circuit
circuit breaker
circuit-breaker
closed
closed position
closed valve
communicates
communication
comprises
direction
drive
electric
electric circuit
equal
flow
flow therethrough
fluid
fluid motor
following
freely
freely communicates
hydraulically-activated
impeded
initial
interference
liquid
located
means
motion
motor
normally-closed
normally-closed valve
openable
operating
operation
opposite
passage
piston
portion
position
pressure
pressure therein
pressurized
pressurized fluid
pressurized liquid
provided
release
release liquid
restored
restoring
space
stroke
substantial
substantial portion
substantially
substantially equal
sufficiently
supplying
supplying pressurized
therein
therethrough
thereto
valve