Hydraulically-activated operating system for an electric circuit breaker

Patent · Mon Jan 01 00:00:00 EST 1979

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

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