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Title: Hydraulically-actuated operating system for an electric circuit breaker

Abstract

This hydraulically-actuated operating system comprises a cylinder, a piston movable therein in an opening direction to open a circuit breaker, and an accumulator for supplying pressurized liquid to a piston-actuating space within the cylinder. A normally-closed valve between the accumulator and the actuating space is openable to allow pressurized liquid from the accumulator to flow through the valve into the actuating space to drive the piston in an opening direction. A vent is located hydraulically between the actuating space and the valve for affording communication between said actuating space and a low pressure region. Flow control means is provided for restricting leakage through said vent to a rate that prevents said leakage from substantially detracting from the development of pressure within said actuatng space during the period from initial opening of the valve to the time when said piston has moved through most of its opening stroke. Following such period and while the valve is still open, said flow control means allows effective leakage through said vent. The accumulator has a limited capacity that results in the pressure within said actuating space decaying promptly to a low value as a result of effective leakage through said vent after the pistonmore » has moved through a circuit-breaker opening stroke and while the valve is in its open state. Means is provided for resetting the valve to its closed state in response to said pressure decay in the actuating space.« less

Inventors:
 [1];  [2]
  1. (Media, PA)
  2. (Secane, PA)
Publication Date:
OSTI Identifier:
863202
Patent Number(s):
US 4118613
Assignee:
General Electric Company (Philadelphia, PA) OSTI
DOE Contract Number:  
EX-76-C-01-2065
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydraulically-actuated; operating; electric; circuit; breaker; comprises; cylinder; piston; movable; therein; direction; accumulator; supplying; pressurized; liquid; piston-actuating; space; normally-closed; valve; actuating; openable; allow; flow; drive; located; hydraulically; affording; communication; pressure; region; control; means; provided; restricting; leakage; rate; prevents; substantially; detracting; actuatng; period; initial; time; moved; stroke; following; allows; effective; limited; capacity; results; decaying; promptly; value; result; circuit-breaker; resetting; closed; response; decay; pressure region; pressurized liquid; electric circuit; flow control; circuit breaker; control means; allow pressurized; allows effective; piston movable; normally-closed valve; supplying pressurized; hydraulically-actuated operating; movable therein; closed valve; /200/60/218/

Citation Formats

Barkan, Philip, and Imam, Imdad. Hydraulically-actuated operating system for an electric circuit breaker. United States: N. p., 1978. Web.
Barkan, Philip, & Imam, Imdad. Hydraulically-actuated operating system for an electric circuit breaker. United States.
Barkan, Philip, and Imam, Imdad. Sun . "Hydraulically-actuated operating system for an electric circuit breaker". United States. doi:. https://www.osti.gov/servlets/purl/863202.
@article{osti_863202,
title = {Hydraulically-actuated operating system for an electric circuit breaker},
author = {Barkan, Philip and Imam, Imdad},
abstractNote = {This hydraulically-actuated operating system comprises a cylinder, a piston movable therein in an opening direction to open a circuit breaker, and an accumulator for supplying pressurized liquid to a piston-actuating space within the cylinder. A normally-closed valve between the accumulator and the actuating space is openable to allow pressurized liquid from the accumulator to flow through the valve into the actuating space to drive the piston in an opening direction. A vent is located hydraulically between the actuating space and the valve for affording communication between said actuating space and a low pressure region. Flow control means is provided for restricting leakage through said vent to a rate that prevents said leakage from substantially detracting from the development of pressure within said actuatng space during the period from initial opening of the valve to the time when said piston has moved through most of its opening stroke. Following such period and while the valve is still open, said flow control means allows effective leakage through said vent. The accumulator has a limited capacity that results in the pressure within said actuating space decaying promptly to a low value as a result of effective leakage through said vent after the piston has moved through a circuit-breaker opening stroke and while the valve is in its open state. Means is provided for resetting the valve to its closed state in response to said pressure decay in the actuating space.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1978},
month = {Sun Jan 01 00:00:00 EST 1978}
}

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