US2364254A - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
US2364254A
US2364254A US395692A US39569241A US2364254A US 2364254 A US2364254 A US 2364254A US 395692 A US395692 A US 395692A US 39569241 A US39569241 A US 39569241A US 2364254 A US2364254 A US 2364254A
Authority
US
United States
Prior art keywords
circuit breaker
switch
insulator
valve
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US395692A
Other languages
English (en)
Inventor
Thommen Hans
Halm Alfred
Bruhlmann Gottfried
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of US2364254A publication Critical patent/US2364254A/en
Anticipated expiration legal-status Critical
Assigned to AIR FORCE, UNITED STATES reassignment AIR FORCE, UNITED STATES CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: OPTIGAIN, INC.
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/008—Pedestal mounted switch gear combinations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/128—Load break switches comprising a separate circuit breaker being operated by a separate mechanism interlocked with the sectionalising mechanism

Definitions

  • This invention relates to electrical switches of the gas blast type in which the arc extinction chamber and the exhaust chamber which is combined with the former, together with the contacts, are mounted on a compressed gas container by means of an intermediate-supporting insulator which serves to conduct the supply of compressed gas to the contacts.
  • the blow valve is located at the end of the arcing chamber facing the supporting insulator and preferably in the coupling between this latter and the arcing chamber.
  • the switching device comprises a gas blast circuit breaker and a voltage disconnecting switch arranged in series the control mechanisms for the blow valve and the voltage disconnecting switch are located inside the coupling. These control mechanisms, being at the energized side of the supporting insulator, can be actuated by means of insulator rods from the grounded side of the switching device.
  • the object of the invention is to improve switching devices of this kind still further by constructing the insulator rod gear so that in addition to actuating the control mechanism it also indicates the position of the voltage isolating switch.
  • a is the compressed gas container which may be made portable.
  • the supporting insulator b which supports the switch chamber c.
  • This switch chamber can contain one or more power rupturing points arranged in series for interrupting the circuit.
  • there is a plurality of rupturing points each of which is located in a special switch chamber comprising an insulator element with metallic end parts which are held together by tie rods.
  • These switch chambers are provided with exhaust outlets for the exhaust gases, these outlets being fitted with closing elements if necessary.
  • the blow valve 1 Inside the coupling h between switch chamber 0 and supporting insulator b is the blow valve 1 which has a control piston k.
  • the control valve m for the blow valve 1' is actuated by the transmission rod 12 of the insulator rod system that is located inside the insulator b, this system also including a cam m and a pivoted lever m.
  • the rod system is actuated by rotating the shaft m by hand, pneumatically or electro-pneumatically through the mid-position to either of the end positions I or II.
  • the voltage disconnecting switch is provided with a pivoted blade.
  • the disconnecting switch p is opened and closed by means of the control pistons t1, t2.
  • the piston ii is in communication with the space behind the blow valve through the conduit in, and the piston t2 is connected with the space below the blow valve through the conduit uz and the change-over valve v, thus being in direct communication with the compressed gas container.
  • the change-over valve 1) is actuated from the disconnecting switch p by means of link rod 101, lever um and springs an, are, these latter being located on the insulator rod n and also serving to guide the rod in its end positions.
  • the shaft n1 must be brought into the mid-position, whereupon the cam m on the insulator rod n is at first only lifted to such an extent that the end of lever n3 lies on the highest point of the cam.
  • the control valve m is thus opened and compressed gas flows from container a through tube In to the rear side of the control piston is of the blow valve 1'.
  • the blow valve 2' then opens and compressed gas fiows to the circuit breaking points in switch chamber 0, opening the arcing contacts and subjecting the arc to a blast of gas. Due to the opening movement of the blow valve communication is established with conduit in and compressed can pass to control piston ii.
  • the conduit in is equipped with some form of throttling element in order to delay the opening of the voltage disconnecting switch 10.
  • change-over valve 11 is actuated by means of link rod 'LDl and lever 102, thus interrupting the connection between the control valve m and the space behind the piston k of the blow valve i.
  • the arrangement of this control mechanism is such that before valve '11 is displaced by lever wz and spring :21 the cam in and the rod n reach the top end position so that the control valve m is closed again.
  • change-over valve v closes. the space above the control piston k is exhausted so that the blow valve is closed by the gas pressure, this action being supported if necessary by a spring not shown in the drawing.
  • the insulator rod mechanism In order to close the voltage disconnecting switch blade the insulator rod mechanism must be brought back into the mid-position from the end position II. During this operation the cam n2 moves downwards into a position where the end of the lever m first rests on the highest point 1: being in the upper position. With the movemerit of the disconnecting switch to the closed position the change-over valve 11 is opened first and then the cam n2 is brought into the lower end position I. The valve m can close again. Upon this indication regarding the position of the voltage disconnecting switch blade the insulator rod is moved still further in dependence on the movement of the disconnecting switch, after the switching operation has been executed.
  • the change-over valve 2 controlled by the disconnecting switch prepares the circuit breaker for the next operation in the reverse order after the circuit has been interrupted and reclosed.
  • the control valve m of the blow valve is actuated in such a manner that during the execution of the control operations it is closed in the end positions,
  • one insulator rod serves to control the blow valve and the voltage disconnecting switch and also to indicate the position of the disconnecting switch.
  • This rod is subjected to compressive and tensile stresses.
  • the change-over valve is first actuated after the control valve for the blow valve has been closed. If the circuit breaker has a device for reclosing the power circuit breaker with the voltage disconnecting switch closed, it is expedient to employ an insulator rod mechanism which closes and opens the compressed gas conduit to the piston which opens the disconnecting switch.
  • a gas blast circuit breaker mounted on a supporting insulator, a disconnect switch in series with the circuit breaker, means including a control valve positioned on the energized side of the supporting insulator for operating said circuit breaker, cylinder and piston means for operating said disconnect switch between open and closed positions, a source of pressure gas, an insulator rod system operable from the grounded side of said supporting insulator for actuating said control valve and admitting pressure gas from said source to said cylinder and piston means, and means including a changeover valve operable by said cylinder and piston means as it actuates said disconnect switch to an end position to establish pressure-gas connections to said cylinder and piston means for energization thereof to actuate the disconnect switch to its alternative end position upon the next admission of pressure gas to said cylinder and piston means by operation of said insulatorrod system.
  • said insulator rod system is adjustable between two end positions to admit pressure gas to said cylinder and piston means to open or alternatively to close said disconnect switch, and said insulator rod system includes means operable at an intermediate position of adjustment thereof to open said control valve to operate said circuit breaker to open position.
  • a switch comprising a gas blast circuit breaker mounted on a supporting insulator, means connecting said circuit breaker with a source of compressed gas including a piston-actuated blow valve for admitting a blast of compressed gas to the circuit breaker, a disconnect switch in series with the circuit breaker, means including a pressure-responsive piston for opening said disconnect switch and a pressure-responsive piston for closing said disconnect switch, control means positioned on the energized side of the supporting insulator comprising a control valve for admitting compressed gas to the blow valve piston to open the blow valve, means actuated by the opening movement of the blow valve for admitting compressed gas to the first piston to open the disconnect switch, means actuated by the closing movement of the disconnect switch to shut off the supply of compressed gas to the blow valve piston and to admit compressed gas to the second piston to close the disconnect switch, and means for actuating said control valve comprising an insulator rod system operable from the grounded side of the supporting insulator.
  • a switch system the combination with a gas blast circuit breaker mounted on a hollow supporting insulator, said circuit breaker including means operable by compressed gas to actuate the circuit breaker, and a disconnect switch in series with the circuit breaker, of means responsive to compressed gas to actuate the disconnect switch, valve means positioned at the energized side of the supporting insulator for controlling the flow of compressed gas to the actuating means of said circuit breaker and then to the actuating means of said disconnect switch, control means comprising an insulator rod system operable from the grounded side of said supporting insulator to operate said valve means to admit compressed gas to the actuating means of the circuit breaker and disconnect switch, and means responsive to movement of the disconnect switch as it approaches either full-open or fullclosed position to operate said valve means to interrupt flow of compressed gas to the actuating means of said circuit breaker.
  • said insulator rod system includes a longitudinally movable insulator rod extending through said supporting insulator from the grounded to the energized side thereof.
  • said insulator rod system in-- cludes a single insulator rod extending through said supporting insulator from the grounded to the energized side thereof, and means for moving said rod longitudinally between two end positions.

Landscapes

  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US395692A 1940-06-10 1941-05-28 Gas blast circuit breaker Expired - Lifetime US2364254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH218748T 1940-06-10

Publications (1)

Publication Number Publication Date
US2364254A true US2364254A (en) 1944-12-05

Family

ID=32108618

Family Applications (1)

Application Number Title Priority Date Filing Date
US395692A Expired - Lifetime US2364254A (en) 1940-06-10 1941-05-28 Gas blast circuit breaker

Country Status (6)

Country Link
US (1) US2364254A (US07816562-20101019-C00012.png)
BE (2) BE441668A (US07816562-20101019-C00012.png)
CH (2) CH207592A (US07816562-20101019-C00012.png)
DE (2) DE706063C (US07816562-20101019-C00012.png)
FR (2) FR849768A (US07816562-20101019-C00012.png)
GB (1) GB511757A (US07816562-20101019-C00012.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548221A (en) * 1949-02-15 1951-04-10 Allis Chalmers Mfg Co Fluid pressure actuated switch
US2602868A (en) * 1949-02-03 1952-07-08 Westinghouse Electric Corp Fluid pressure assembly
US2667554A (en) * 1951-06-26 1954-01-26 Gen Electric Operating mechanism for electric circuit breakers

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR871241A (fr) * 1941-04-01 1942-04-13 Merlin Gerin Perfectionnements aux interrupteurs à fluide gazeux comprimé
US2646483A (en) * 1949-01-29 1953-07-21 Westinghouse Electric Corp Pneumatic operating assembly for air-blast circuit interrupters
US2644876A (en) * 1950-08-19 1953-07-07 Westinghouse Electric Corp High-speed compressed-air circuit breaker
US2752448A (en) * 1951-04-27 1956-06-26 Westinghouse Electric Corp Switching equipment for compressed air circuit breakers
DE964962C (de) * 1953-01-03 1957-05-29 Licentia Gmbh Druckgasschalter
FR1097220A (fr) * 1953-10-16 1955-07-01 Merlin Gerin Dispositif de raccordement, aux lignes aériennes, des disjoncteurs pneumatiques
NL197693A (US07816562-20101019-C00012.png) * 1954-06-01
DE1240737B (de) * 1962-06-05 1967-05-18 Moviecol Sales Ltd Projektor zur Wiedergabe von bewegten oder stillstehenden Bildern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602868A (en) * 1949-02-03 1952-07-08 Westinghouse Electric Corp Fluid pressure assembly
US2548221A (en) * 1949-02-15 1951-04-10 Allis Chalmers Mfg Co Fluid pressure actuated switch
US2667554A (en) * 1951-06-26 1954-01-26 Gen Electric Operating mechanism for electric circuit breakers

Also Published As

Publication number Publication date
BE441668A (US07816562-20101019-C00012.png)
DE706063C (de) 1941-05-16
DE726676C (de) 1942-10-19
FR51593E (fr) 1943-02-05
GB511757A (en) 1939-08-23
BE432598A (US07816562-20101019-C00012.png)
FR849768A (fr) 1939-12-01
CH207592A (de) 1939-11-15
CH218748A (de) 1941-12-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AIR FORCE, UNITED STATES, OHIO

Free format text: CONFIRMATORY LICENSE;ASSIGNOR:OPTIGAIN, INC.;REEL/FRAME:013663/0322

Effective date: 20021024