US3043940A - Compressed-gas circuit interrupter - Google Patents

Compressed-gas circuit interrupter Download PDF

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Publication number
US3043940A
US3043940A US708298A US70829858A US3043940A US 3043940 A US3043940 A US 3043940A US 708298 A US708298 A US 708298A US 70829858 A US70829858 A US 70829858A US 3043940 A US3043940 A US 3043940A
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United States
Prior art keywords
isolating
contacts
contact
gas
pressure
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
US708298A
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English (en)
Inventor
Winthrop M Leeds
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US708298A priority Critical patent/US3043940A/en
Priority to DEW24736A priority patent/DE1165718B/de
Priority to CH6794059A priority patent/CH375417A/de
Priority to GB733/59A priority patent/GB854254A/en
Priority to FR783664A priority patent/FR1218705A/fr
Application granted granted Critical
Publication of US3043940A publication Critical patent/US3043940A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/16—Continuous control along the route
    • B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • 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

Definitions

  • COMPRESSED-GAS CIRCUIT INTERRUPTER Filed Jan. 10, 1958 2 Sheets-Sheet 2 :0 rd E 10] w .9 34 l LL 0 r j u o m Compressor United States Patent 9-" 3,043,940 COMPRESSED-GAS CIRCUIT INTERRUPTER Winthrop M. Leeds, Forest Hills, Pa., assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Filed Jan. 10, 1958, Ser. No. 708,298 6 Claims. (Cl. 200-148)
  • This invention relates to circuit interrupters in general and, more particularly, to interrupting structures for compressed-gas circuit interrupters.
  • a general object of the invention is to provide an improved compressed-gas circuit interrupter, which will be more efiective, and which will operate more rapidly than circuit interrupters of the compresesd-gas type heretofore utilized in the industry.
  • a more specific object of the present invention is to provide an improved compressed-gas circuit interrupter in which the gas reservoir chamber is disposed at high potential, in an elevated position, and the contactoperating pistons are positioned immediately adjacent to said gas reservoir chamber, so that exceedingly rapid opening movement is obtained of the movable contacts during the circuit interrupter opening operation.
  • Another object of the invention is to provide an improved contact operating mechanism for a compressedgas circuit interrupter in which the gas reservoir chamber is disposed at high potential in an elevated position, and the contact operating cylinder extends interiorly within said gas storage reservoir chamber, to thereby eliminate any delay during the contact opening movement.
  • Yet a further object of the invention is to provide an improved compressed-gas circuit interrupter utilizing one or more arc-extinguishing units, each of which includes two pairs of separable contacts, wherein one set of separable contacts is employed to effect are extinction, whereas the other set of separable contacts performs an isolating function, and maintains the circuit open following reclosure of the first said pair of separable contacts.
  • Another object of the invention is to provide an improved compressed-gas circuit interrupter employing a pair of isolating contacts in series with a pair of separable arcing contacts, in which the isolating contacts maintain the circuit open following reclosure of the arcing contacts, and in which the isolating contacts remain separated in the open position within a pressurized isolating chamber.
  • Still a further object of the present invention is to provide an improved compressed-gas circuit interrupter of generally T-shaped construction, employing two laterally extending arc-extinguishing units supported at the upper end of an upstanding insulating pedestal, a gas reservoir chamber, or tank, being disposed at high potential on top of said supporting pedestal and having extending therethrough an elongated "operating cylinder, within which operate the two contact pistons for the pair of movable arcing contacts.
  • Still another object of the invention is to provide an improved compressed-gas circuit interrupter of the type specified in the immediate preceding paragraph, in which a pair of serially related isolating contacts is associated with each pair of arcing contacts, and separate, in the open-circuit position of the interrupter, within a pressurized isolating chamber.
  • An ancillary object of the invention is to provide an improved compressed-gas circuit interrupter in which a somewhat fragile, weatherproof casing, such as aporcelain casing, is protected from the explosive effect of the gas blast by a concentrically positioned interiorly disposed insulating tube of the requisite mechanical strength.
  • the reference numeral 1 generally designates a compressed-gas circuit interrupter of generally T-shaped configuration, including a pair of laterally extending arc-extinguishing units 2 jutting substantially horizontally outwardly from a centrally disposed metallic gas reservoir chamber 3.
  • the gas reservoir chamber, or tank 3 is supported at the upper end of a hollow insulating pedestal 4, preferably formed from a suitable weatherproof material, such as porcelain.
  • Each arc-extinguishing unit 2 generally includes a pair of arcing contacts 8, 9 and a serially related pair of isolating contacts 10, 11.
  • the construction is such, as more fully explained hereinafter, that the arcing contacts 8, 9 separate first, and extinguish the arc therebetween, and subsequently, the isolating contacts 10, 11 separate to provide an isolating gap in the circuit, maintaining the circuit open, despite a subsequent reclosure of the arcing contacts 8, 9.
  • the gas reservoir tank 3 has welded thereto cylindrical support members 12 having support plates 12a welded to the outer ends thereof.
  • a horizontally extending, insulating, support tube 13 To each outer face of support plate 12a is suitably secured, by means of barrel nuts and bolts, a horizontally extending, insulating, support tube 13.
  • the support tube 13 assists in defining an arcing chamber 15 and an isolating chamber 16.
  • the two movable arcing contacts 9 have secured thereto, adjacent the inner ends thereof, a pair of contact operating pistons 17, which are biased apart by a compression closing spring 18.
  • the movable arcing contacts 9 engage relatively stationary, orifice-shaped contacts 8 of generally cup-shaped configuration.
  • the stationary cup-shaped contacts 8 has integrally formed therewith a spider-support member 19, which supports the relatively stationary, isolating contact 11.
  • the relatively stationary isolating contact 11 cooperates with the movable isolating contact 10, the latter being secured to a contact operating piston 20, separable within a stationary operating cylinder 21.
  • a closing, compression spring 22 biases each of the movable isolating contacts 10 to its closed position in engagement with the stationary isolating contacts 11, as shown in FIG. 1A.
  • the supporting tube 13 maintains in compression a surrounding weatherproof casing 23 preferably composed of porcelain, and serves to protect the latter from the explosive eitects of arcing.
  • the insulating support tube 13 is in tension between the support plate 12a, the latter being secured to the cylindrical support member 12, and an outer cap closure member 24.
  • a vent tube 25 extends through the closure cap 24 and leads into the space 26 in back of the contact operating piston 20.
  • a movable valve 27, carried at the outer extremity of the movable isolating contact 10, cooperates with the vent tube 25, to close the latter at the extreme end of the opening movement of the movableisolating contact 10.
  • the gas reservoir tank 3 is preferably maintained at a pressure of say 250 p.s.-i. by means of a supply conduit 23, which passes downwardly through the pedestal 4 and is connected, through a reducing valve 29, with a highpressure air storage reservoir 3%) (FIG. 1B).
  • the storage tank is supported within the framework 5, and preferably contains gas at high pressure, say at 500 psi.
  • a compressor 31 is employed to compress air to the 500 p.s.i. pressure, and to feed it, by a conduit 32, into the base storage tank 30, maintaining the latter at its highpressure condition.
  • the supply conduit 28 is formed of insulating material.
  • the electrical circuit therethrough includes line terminal lug 33, conducting closure cap 24, conducting operating cylinder 21, piston 20, movable isolating contact 10, relatively stationary isolating contact 11, spider-support member 19, relatively stationary, orifice-shaped arcing contact 8, movable arcing contact 9, operating piston 17, conducting operating cylinder 34, and through the right-hand, arc-extinguishing unit 2, in a similar manner, to the right-hand terminal lug 35.
  • a control conduit 37 which leads to a two-way opening valve 38.
  • the opening valve 33 is actuated by an operating rod 39 of insulating material, which extends downwardly interiorly within hollow sup port pedestal 4 and is secured to an armature 40.
  • the armature 40 is moved, by an opening coil 41, which may be energized from a suitable battery source 42', by the closing of a normally open open button 43.
  • closing the open or trip button 43 will effect an energization of opening solenoid 41.
  • This will move armature 40 and hence insulating operating rod 39 downwardly, closing 011 the high-pressure connection 44 to the valve 38, and opening the low-pressure connection 45.
  • the low-pressure conduit 45 opens to the low pressure region 46 within hollow pedestal 4.
  • a lowpressure, air-release valve 47 maintains the air pressure within region 46 at substantially atmospheric pressure, but prevents the entrance thereinto of a moisture-laden air from the ambient air outside of the support pedestal 4.
  • the two movable arcing contacts 9 will move toward each other, in the opening direction, as caused by highpressure air within tank 3 acting through openings 49 of operating cylinder 34 upon the outer faces of the operating pistons 17.
  • the movable arcing contacts 9 will hence move toward each other very rapidly, because of the immediate proximity of the storage reservoir 3 and the location of openings 49 in operating cylinder 34.
  • the opening motion of the movable arcing contacts 9 away from their cooperable stationary contacts 8 will establish a pair of serially related arcs within the two arc-extinguishing units 2 simultaneously.
  • the high-pressure air, or gas will also pass through the openings 49, provided in operating cylinder 34, and pass through the orifice opening 50 provided by orifice-shaped, stationary contact 8.
  • This high-pressure air, passing through orifree 50, will extinguish the are established between separated contacts 8, 9, and will pass around the spider support member 19 to raise the pressure within the isolating chamber 16.
  • the tension spring 48 will effect upward movement of the operating rod 39, following deenergization of opening solenoid 41, and consequently, the two-way valve 38 will return to its original condition, wherein it connects high-pressure conduit 44 with control conduit 37. This will raise the pressure within region 36 between contact pistons 17 to the pressure of tank 3, and consequently, the compression spring 18 will effect rapid closing of both serially related pairs of arcing contacts 8, 9, the two pairs of isolating contacts 10, 11 remaining open.
  • the closing button 51 When it is desired to effect the closing of the circuit through the interrupter 1, the closing button 51 is depressed, thereby energizing, through the battery 42, the closing solenoid 52. This will attract closing armature 53 and hence pull operating rod 54 downwardly. Such action will rotate the two-way closing valve 55 connecting the lowapressure conduit 56 with the control conduit 57, the latter leading through the support cylinder 12 to the regions 16 within the isolating chambers. This will dump the high pressure out of isolating chambers 16 and permit the closing compression springs 22 to move the isolating pistons 20, and movable isolating contacts 10 into engagement with the stationary isolating contacts 11. Since the arcing contacts 8, 9 have previously closed, this action will effect closing of the circuit through the interrupter 1.
  • the closing button 51 is only momentarily actuated, so that following its release, the tension spring 58 will move closing rod 54 upwardly, thereby returning closing valve 55 to its original condition, as shown in FIG. 1A, wherein control conduit 57 is closed off.
  • the interrupter 1 is now in readiness for a subsequent opening operation.
  • the structure of the invention has an additional advantage, inasmuch as the contact pistons 17 are not required to hold a lange pressure differential for a long time, it being noted that the movable arcing contacts 9 and the contact piston 17 operating the same, are maintained in the open position only for a short period of time just sufficient to effect arc extinction, and to enable the r'nov-able isolating contact to move to its open position.
  • the controls for operating the valves 38, 55 are at ground potential, and insulated from all high-voltage parts by the insulatin g operating rods 39, 54.
  • the lower storage tank 30 provides for replenishing the compressed gas in the upper tank 3 through the feed conduit 28 for a number of additional operations, even though the compressor 31 may fail to function.
  • the interrupter 1 is so constructed as to function for a large number of operations if, for somereason, the compressor 31 becomes inoperable.
  • a distinct advantage of the invention is the particular location of the operating cylinder 34 for the two movable contact pistons 17. Not only does the operating cylinder 34 accommodate movement of both contact pistons 17, but “also, extending diametrically across the air reservoir tank 3, it provides additional structural support, and insures that the openings 49 therein provide an immediate supply of high-pressure gas at the right location during the initial portion of the opening operation of the interrupter 1.
  • the movable main arcing contact 9 is provided with a movable valve ring 9a of suitable flexible material on the upstream side of the region of arcing to assist in maintaining a proper high-pressure air seal in the closed-circuit position of the interrupter.
  • the areresisting tip portion 9b of the contact '9 resists arc erosion, and the contact surfaces 90 and 8a engage to provide a good path for current flow in the closed-circuit position, as shown in FIG. 2.
  • a compressed-gas circuit interrupter including an arc-extinguishing unit, said unit including a pair of soparable arcing contacts and a serially related pair of isolating contacts, said pair of isolating contacts remaining open in the open-circuit position of the interrupter, an operating piston :for effecting opening motion of one of said isolating contacts, means defining an isolating chamber, means for sending a blast of compressed gas adjacent the pair of separable arcing contacts, said blast of gas exhausting into said isolating chamber to raise the pressure within said isolating chamber, said operating pisvton responding to a rise of pressure within said isolating chamber by moving and so effecting opening movement of said one isolating contact, and said serially related pair of isolating contacts separating only following interruption of the are between said pair of separable arcing contacts.
  • a compres ed-gas circuit interrupter including an arc-extinguishing unit, said arc-extinguishing unit having a pair of separable arcing contacts at one end thereof and a pair of isolating contacts at the other end thereof, means defining a substantially closed isolating chamber within which said pair of isolating contacts separate, an operating cylinder positioned within said substantially closed isolating chamber, a piston for opening one of said isolating contacts and movable within said operating cylinder, a vent for said operating cylinder, means causing a blast of gas to extinguish the are at said pair of separable arcing contacts and to exhaust into said substantially closed isolating chamber to effect opening of said one isolating contact, a movable closing valve movable with said piston for closing said vent at the end of the opening movement of said one isolating contact, and said pair of I isolating contacts remaining open in the open-circuit position of the interrupter.
  • a compressed-gas circuit interrupter including an arc-extinguishing unit, said unit including a pair of separable arcing contacts and a serially related pair of isolating contacts, said pair of isolating contacts remaining open in the open-circuit position of the interrupter, means defining a substantially closed isolating chamber, means for sending a blast of gas adjacent the pair of separable arcing contacts to effect the extinction of the are drawn thereat, said blast of gas exhausting at least in part into said substantially closed isolating chamber, means responsive to a rise of pressure Within said Substantially closed isolating chamber to effect separation of the isolating contacts, and said pair of isolating contacts separating in an ambient of high-pressure gas to permit minimum Contact separation therebetween.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Circuit Breakers (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US708298A 1958-01-10 1958-01-10 Compressed-gas circuit interrupter Expired - Lifetime US3043940A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US708298A US3043940A (en) 1958-01-10 1958-01-10 Compressed-gas circuit interrupter
DEW24736A DE1165718B (de) 1958-01-10 1958-12-24 Druckgasschalter
CH6794059A CH375417A (de) 1958-01-10 1959-01-02 Elektrischer Schalter
GB733/59A GB854254A (en) 1958-01-10 1959-01-08 Improvements in or relating to gas blast electric circuit interrupters
FR783664A FR1218705A (fr) 1958-01-10 1959-01-09 Interrupteur pneumatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US708298A US3043940A (en) 1958-01-10 1958-01-10 Compressed-gas circuit interrupter

Publications (1)

Publication Number Publication Date
US3043940A true US3043940A (en) 1962-07-10

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ID=24845240

Family Applications (1)

Application Number Title Priority Date Filing Date
US708298A Expired - Lifetime US3043940A (en) 1958-01-10 1958-01-10 Compressed-gas circuit interrupter

Country Status (5)

Country Link
US (1) US3043940A (de)
CH (1) CH375417A (de)
DE (1) DE1165718B (de)
FR (1) FR1218705A (de)
GB (1) GB854254A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108168A (en) * 1960-09-07 1963-10-22 Asea Ab Device for air blast circuit breaker
US3240910A (en) * 1962-07-05 1966-03-15 Bbc Brown Boveri & Cie Gas blast circuit breaker with stationary spaced tubular contacts and piston actuated contact bridge including blast valve actuated thereby
US3251970A (en) * 1961-03-17 1966-05-17 English Electric Co Ltd Resetting control apparatus for switchgear
US3311726A (en) * 1964-10-05 1967-03-28 Westinghouse Electric Corp Puffer-type fluid-blast circuit interrupter with pressurized casing for actuating driving piston
US3433913A (en) * 1965-07-28 1969-03-18 Westinghouse Electric Corp Gas-blast circuit interrupter
US3541285A (en) * 1967-02-28 1970-11-17 Siemens Ag High-voltage gas blast switch having upstream valves for control of gas movement
US3624326A (en) * 1969-04-04 1971-11-30 Westinghouse Electric Corp Compressed-gas circuit breaker with readily removable terminal bushing means
US4029922A (en) * 1974-10-01 1977-06-14 Asea Aktiebolag Operating device for enclosed high voltage circuit breakers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163940B (de) * 1960-02-25 1964-02-27 Asea Ab Druckluftschalter mit reihengeschalteter Trennstelle in einer Durchfuehrung
FR1297821A (fr) * 1961-05-19 1962-07-06 Merlin Gerin Disjoncteur à gaz comprimé et procédé de sa fabrication

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345724A (en) * 1942-03-19 1944-04-04 Westinghouse Electric & Mfg Co Circuit breaker
US2367934A (en) * 1942-07-30 1945-01-23 Vickers Electrical Co Ltd Fluid blast circuit breaker
GB581236A (en) * 1943-09-04 1946-10-04 Bbc Brown Boveri & Cie Improvements in or relating to gas blast multi-break electric circuit breakers
GB582599A (en) * 1944-07-07 1946-11-21 English Electric Co Ltd Improvements in electric circuit breakers
GB593230A (en) * 1945-07-11 1947-10-10 Gen Electric Co Ltd Improvements in and relating to air-blast electrical circuit breakers
US2665351A (en) * 1951-02-09 1954-01-05 Asea Ab Arrangement in air blast circuit breaker provided with damping resistance
US2670420A (en) * 1949-01-18 1954-02-23 Asea Ab Arrangement in air blast circuit breakers
DE933819C (de) * 1953-10-23 1955-10-06 Liebknecht Transformat Anordnung zum Abschalten der Schutzwiderstaende von Hochspannungsschaltern mit Druckgasantrieb

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE549741C (de) * 1930-04-04 1932-04-30 Aeg Schaltvorrichtung mit mehreren in Reihe liegenden Schaltstellen
GB702509A (en) * 1951-02-28 1954-01-20 Licentia Gmbh A gas-blast electric circuit breaker
DE910077C (de) * 1951-11-01 1954-04-29 Licentia Gmbh Elektrischer Schalter mit Lichtbogenloeschung durch ein stroemendes Druckmittel, wie Druckgas
BE537304A (de) * 1954-04-30 Merlin Gerin

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345724A (en) * 1942-03-19 1944-04-04 Westinghouse Electric & Mfg Co Circuit breaker
US2367934A (en) * 1942-07-30 1945-01-23 Vickers Electrical Co Ltd Fluid blast circuit breaker
GB581236A (en) * 1943-09-04 1946-10-04 Bbc Brown Boveri & Cie Improvements in or relating to gas blast multi-break electric circuit breakers
GB582599A (en) * 1944-07-07 1946-11-21 English Electric Co Ltd Improvements in electric circuit breakers
GB593230A (en) * 1945-07-11 1947-10-10 Gen Electric Co Ltd Improvements in and relating to air-blast electrical circuit breakers
US2670420A (en) * 1949-01-18 1954-02-23 Asea Ab Arrangement in air blast circuit breakers
US2665351A (en) * 1951-02-09 1954-01-05 Asea Ab Arrangement in air blast circuit breaker provided with damping resistance
DE933819C (de) * 1953-10-23 1955-10-06 Liebknecht Transformat Anordnung zum Abschalten der Schutzwiderstaende von Hochspannungsschaltern mit Druckgasantrieb

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108168A (en) * 1960-09-07 1963-10-22 Asea Ab Device for air blast circuit breaker
US3251970A (en) * 1961-03-17 1966-05-17 English Electric Co Ltd Resetting control apparatus for switchgear
US3240910A (en) * 1962-07-05 1966-03-15 Bbc Brown Boveri & Cie Gas blast circuit breaker with stationary spaced tubular contacts and piston actuated contact bridge including blast valve actuated thereby
US3311726A (en) * 1964-10-05 1967-03-28 Westinghouse Electric Corp Puffer-type fluid-blast circuit interrupter with pressurized casing for actuating driving piston
US3433913A (en) * 1965-07-28 1969-03-18 Westinghouse Electric Corp Gas-blast circuit interrupter
US3541285A (en) * 1967-02-28 1970-11-17 Siemens Ag High-voltage gas blast switch having upstream valves for control of gas movement
US3624326A (en) * 1969-04-04 1971-11-30 Westinghouse Electric Corp Compressed-gas circuit breaker with readily removable terminal bushing means
US4029922A (en) * 1974-10-01 1977-06-14 Asea Aktiebolag Operating device for enclosed high voltage circuit breakers

Also Published As

Publication number Publication date
FR1218705A (fr) 1960-05-12
GB854254A (en) 1960-11-16
CH375417A (de) 1964-02-29
DE1165718B (de) 1964-03-19

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