skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Inventors:
 [1];  [2]
  1. (Secane, PA)
  2. (Stanford, CA)
Publication Date:
OSTI Identifier:
863416
Patent Number(s):
US 4166937
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-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; /200/218/

Citation Formats

Imam, Imdad, and Barkan, Philip. Hydraulically-activated operating system for an electric circuit breaker. United States: N. p., 1979. Web.
Imam, Imdad, & Barkan, Philip. Hydraulically-activated operating system for an electric circuit breaker. United States.
Imam, Imdad, and Barkan, Philip. Mon . "Hydraulically-activated operating system for an electric circuit breaker". United States. doi:. https://www.osti.gov/servlets/purl/863416.
@article{osti_863416,
title = {Hydraulically-activated operating system for an electric circuit breaker},
author = {Imam, Imdad and Barkan, Philip},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1979},
month = {Mon Jan 01 00:00:00 EST 1979}
}

Patent:

Save / Share: