US3073931A - Compressed-gas circuit interrupter - Google Patents

Compressed-gas circuit interrupter Download PDF

Info

Publication number
US3073931A
US3073931A US842069A US84206959A US3073931A US 3073931 A US3073931 A US 3073931A US 842069 A US842069 A US 842069A US 84206959 A US84206959 A US 84206959A US 3073931 A US3073931 A US 3073931A
Authority
US
United States
Prior art keywords
pressure
pair
gas
tank
blast
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
US842069A
Other languages
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 US842069A priority Critical patent/US3073931A/en
Priority to DEW28568A priority patent/DE1150134B/de
Priority to CH1060660A priority patent/CH396144A/de
Priority to FR839422A priority patent/FR1274686A/fr
Application granted granted Critical
Publication of US3073931A publication Critical patent/US3073931A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
    • H01H33/83—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas wherein the contacts are opened by the flow of air or gas

Definitions

  • Another object of the present invention is to provide an improved compressed-gas circuit interrupter in which the storage tank, containing high-pressure gas, is disposed immediately adjacent to the contact structure, so that there will be little or no delay in applying the gas blast for effecting are extinction.
  • Still a further object of the invention is to provide a simplified contact-operating arrangement, in which mechanical linkages and cumbersome operating levers are avoided, and yet simultaneous contact-opening and closing movement may be achieved in a simplified manner.
  • a further object of the present invention is to provide a high-speed, compressed-gas circuit interrupter of simplified construction which is highly efiective in operation.
  • Another object of the present invention is to provide an improved compressed-gas circuit interrupter utilizing a relatively low-pressure exhaust tank at high potential, within which is interiorly disposed a high-pressure storage tank; and blast-valve means are employed to reiease a blast of gas from the high-pressure storage tank toward the established arcs to effect are extinction.
  • Another object of the invention is to provide an improved compressed-gas circuit interrupter of the type specified in the immediately preceding paragraph, in which a balanced-pressure blast valve is employed, and a pilot valve is actuated from ground potential for dumping the pressure in back of the balanced-pressure blast valve for obtaining rapid circuit interruption.
  • FIGURE 1 is a side elevational view of one pole-unit of a compressed-gas circuit interrupter embodying the principles of the present invention
  • FIG. 2 is a fragmentary, vertical sectional view taken through the tank assembly of the pole-unit of FIG. 1, with the contact structure and the blast-valve mechanism being shown in the open-circuit position;
  • FIG. 3 is a detailed view of a one-way-acting ball valve to obtain rapid closing operation of the movable contacts.
  • the reference numeral 1 generally desig- States at Patented Jan. 15, 1963 2 nates a compressed-gas circuit interrupter pole-unit, including, generally, a mechanism compartment 2, an upstanding insulating column 3, which may be formed from porcelain, and a high-potential, metallic, relatively'lowpressure exhaust tank 4.
  • the ends of the metallic tank 4 are preferably closed by inspection cover plates 5, 6.
  • a pair of canted, cylindrical metallic supports 8 Disposed at the upper side of the metallic tank 4 and bolted thereto, as at 7, is a pair of canted, cylindrical metallic supports 8, into which extend a pair of terminal bushings 9, 10.
  • Line connections 11, 12 may be made to the extremities of the terminal bushings 9, to in a manner well known to those skilled in the art.
  • An addi tional inspection cover 13 may be employed, the purpose for which will appear more fully hereinafter.
  • FIG. 2 which illustrates a vertical sectional view taken through the tank structure 4, it will be noted that a pair of identical arc-extinguishing units 15 are disposed at the opposite ends of a high-pressure storage tank 16, which is disposed interiorly within the outer relatively-low-pressure exhaust tank 4.
  • each of the two arcextinguishing units 15 Associated with the upper end of each of the two arcextinguishing units 15 is an orifice structure 17, through which an are 18 is drawn.
  • FIG. 2 iiiustrates the position of the several parts in the fully open-circuit position of the device, nevertheless, for purposes of illustration, the are 18 has been drawn into the figure.
  • Blast-valve means 19 are associated with the highpressure storage tank 16, and, in this instance, includes a balanced-pressure blast valve 20.
  • the balanced-pressure blast valve 20 includes an operating piston 21, which, by virtue of an aperture 22, has normally high-pressure gas on both faces of the piston 21.
  • the operating piston 21 is biased to a valve-closed position by a compression spring 23.
  • the blast valve 2b is opened by dumping the pressure below the operating piston 21, within the region 24, by the opening of a pilot valve 25, which is manually operated through an insulating rod 26, which extends downwardly interiorly through the porcelain column 3 to the operating mechanism disposed within the mechanism compartment 2 (FIG. 1).
  • a pair of oppositely extending blast tubes 27, 28 extend from a manifold box 29, and lead to the orifice structures 17 to bring about extinction of the arcs 18.
  • the upper ends of the movable contacts 32 cooperate with resilient, relatively stationary contact fingers 33, constituting collectively a relatively stationary contact structure 34.
  • each movable contact 32 has a notch 40 provided therein, which cooperates with a latch 41, which serves to retain the movable contact 32 in the open-circuit position, as shown.
  • the latch 41 is biased toward a latching position by a coil spring, not shown.
  • a plunger 42 is provided, spring-biased downwardly by a compression spring 43 to a limiting position, and is moved upwardly to release the latch 41 by the raising of the pressure within the region 44 below a piston 45 attached to the plunger 42.
  • Pipe connections 46 conduct a closing blast of gas into the operating cylinders 47 for moving the pistons 45 upwardly to release the latches 41.
  • the pipes or conduits 46 interconnect, as at 48, and lead into a vertically extending, insulating closing conduit 42.
  • compressed gas passing upwardly through the closing conduit 49, and outwardly through the pipes 46, eifects upward movement of the plungers 62 to thereby effect releasing rotative movement of the latches 41 and consequently contact reclosure.
  • the high-pressure storage tank 16 is supplied with high-pressure gas through an upstanding feed conduit 50, composed of insulating material and extending upwardly interiorly within the insulating column 3.
  • the electrical circuit therethrough includes transmission line 11, terminal stud 51, extending axially through the terminal bushing 9, relatively stationary contact structure 34, movable contact 32, operating piston 31, walls 37 of the operating cylinder (flexible connectors may be employed), to conducting laterally extending supports 52, to which the operating cylinder 37 is bolted, through the metallic walls of the high-pressure tank 16, through the metallic supports 52 at the right-hand end of the highpressure chamber 16, and through the right-hand arcextinguishing unit 15 in a similar manner, through righthand tenninal stud 53, and interiorly through terminal bushing It to the transmission line 12 (FIG. 1).
  • the movable rod-shaped contacts 32 make contacting engagement with relatively stationary fingers 33 of the relatively stationary contact structures 34.
  • suitable mechanism disposed interiorly within the mechanism compartment 2, elfects downward opening movement of the insulating operating trip rod 26.
  • the downward movement of the trip rod 26 eifects downward opening movement of the pilot valve 25 in opposition to the biasing action exerted by a pilot-valve closing spring 54.
  • the opening of the pilot valve 25 dumps the high pressure Within the region 24 below the operating piston 21 into the general interior 55 of the tank 4, which is at a relatively low pressure, say 30 p.s.i.
  • the latches 41 latch to the movable contacts 32, when the latter have attained their fully open-circuit position.
  • each ball-valve assembly 60 comprises the ball valve 61, which closes an aperture 62;
  • suction is not permitted to take place within the region 63 below the operating piston 31, since at this time the ball valve opens and permits free flow of gas through the valve assembly 60.
  • the contact-closing spring 36 provides unimpeded closing movement of the movable contact 32 into engagement with the stationary contact fingers 33.
  • a Sylphon bellows 65 is provided to prevent passage of the relatively low-gas pressure, which may be of the order of 30 p.s.i., into the interior region 66 within the upstanding supporting insulating column 3. However, where the supporting column 3 is able to withstand the same pressure as is present Within the exhaust tank 4, the bellows 65 may be omitted.
  • the main exhaust tank 4 may be filled with a suitable arc-extinguishing gas, such as sulfur hexafiuoride (SP gas at a relatively low presusre of 30 p.s.i.
  • SP gas sulfur hexafiuoride
  • High-pressure gas is stored at a high-pressure of say to 200 p.s.i. in both a reservoir at ground potential, not shown, and also in the auxiliary high-pressure storage tank 16 disposed within the main tank 4, all at high potential.
  • SP gas sulfur hexafiuoride
  • the pilot valve 25 is opened by downward movement of the insulating trip rod 26, pressure is dumped from behind the blast-valve piston 21, which immediately moves downwardly.
  • High-pressure gas flows outwardly to the pair of contact opening pistons 31, which are dis placed downwardly and latched in the open position.
  • the arcs 18, drawn through the polytetrafluoroethylene orifices 17, are extinguished by the high-pressure sulfur hexafluoride gas-blast through the orifices 17, and into the main body of the tank 4 at relatively low pressure.
  • the simplified closing operation merely involves the admittance of gas to the pistons 45 under each latch 41, which results in the plungers 42 knocking the latches off, and allowing the contact-closing springs 36 to close the contacts.
  • a compressed-gas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures at their interior ends, a high-pressurestorage tank disposed at high potential and positioned interiorly Within said relatively low-pressure metallic exhaust tank, insulating means for supporting the relatively low-pressure metallic exhaust tank up in the air above ground potential, a pair of movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, supporting means including said high-pressure storage tank for supporting said pair of movable contacts, and means connecting the two movable contacts in series.
  • a compressed-gas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures'at their interior ends, a high-pressure storage tank disposed at high potential and positioned interiorly within said relatively low-pressure metallic exhaust tank, insulating meansfor'supporting the relatively lowpressure metallic exhaust tank up in the air above ground potential, a pair of movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, blast-valve means for releasing a blast of gas from said high-pressure storage tank to extinguish the arcs, and means including the high-pressure storage tank for connecting the two movable contacts in series.
  • a compressed-gas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures at their interior ends, a high-pressure storage tank disposed at high potential and positioned interiorly within said relatively low-pressure metallic exhaust tank, insulating means for supporting the relatively lowpressure metallic exhaust tank up in the air above ground potential, a pair of movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, a pair of insulating orifices through which the pair of arcs are drawn, blast-valve means for releasing a blast of gas from said high-pressure storage tank to extinguish the arcs, and means including the highpressure storage tank for connecting the two movable contacts in series.
  • a compressedgas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures at their interior ends, a high-pressure storage tank disposed at high potential and positioned interiorly within said relatively low-pressure metallic exhaust tank, insulating means for supporting the relatively lowpressure metallic exhaust tank up in the air above ground potential, a pair of movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, supporting means including said highpressure storage tank for supporting said pair of movable contacts, blast-valve means for releasing a blast of gas from said high-pressure storage tank to extinguish the arcs including a balanced-pressure blast valve, a pilot valve actuated from ground potential for dumping the pressure in back of the balanced-pressure blast valve, and means connecting the two movable contacts in series.
  • a compressed-gas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures at their interior ends, a high-pressure storage tank disposed at high potential and positioned interiorly Within said relatively low-pressure metallic exhaust tank, insulating means for supporting the relatively lowpressure metallic exhaust tank up in the air above ground potential, a pair of movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, supporting means including said highpressure storage tank for supporting said pair of movable contacts, blast-valve means for releasing a blast of gas from said high-pressure storage tank to extinguish the arcs including a balanced-pressure blast valve, a pilot valve actuated from ground potential for dumping the pressure in back of the balanced-pressure blast valve, means connec'ting the two movable contacts in series, and an insulating rod extending upwardly interiorly Within said insulating means for opening said pilot valve.
  • a compressed-gas circuit interrupter including a relatively low-pressure metallic exhaust tank disposed at high potential, a pair of terminal bushings extending into said metallic exhaust tank and carrying relatively stationary contact structures at their interior ends, a high-pressure storage tank disposed at high potential and positioned interiorly within said relatively low-pressure metallic exhaust tank, insulating means for supporting the relatively low-pressure metallic exhaust tank up in the air above ground potential, a pair or movable contacts cooperable with the aforesaid relatively stationary contact structures to establish a pair of arcs, supporting means including said high-pressure storage tank for supporting said pair of movable contacts, means connecting the two movable contacts in series, means latching the pair of movable contacts in the open position, and pressure-actuated means for releasing said latching means.
  • each interrupting unit including a spring-biased-closed movable contact, latching means associated with each interrupting unit to latch the respective movable contact in the open circuit position, means including said conducting reservoir tank for electrically interconnecting the two movable contacts in series, and blast-valve means for releasing a blast of gas from said conducting reservoir tank toward both gas-blast interrupting units to effect are extinction therein.

Landscapes

  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
US842069A 1959-09-24 1959-09-24 Compressed-gas circuit interrupter Expired - Lifetime US3073931A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US842069A US3073931A (en) 1959-09-24 1959-09-24 Compressed-gas circuit interrupter
DEW28568A DE1150134B (de) 1959-09-24 1960-09-15 Druckgasschalter mit einem geschlossenen Gehaeuse
CH1060660A CH396144A (de) 1959-09-24 1960-09-20 Leistungsschalter mit einem geschlossenen Gehäuse
FR839422A FR1274686A (fr) 1959-09-24 1960-09-23 Interrupteur à gaz comprimé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US842069A US3073931A (en) 1959-09-24 1959-09-24 Compressed-gas circuit interrupter

Publications (1)

Publication Number Publication Date
US3073931A true US3073931A (en) 1963-01-15

Family

ID=25286448

Family Applications (1)

Application Number Title Priority Date Filing Date
US842069A Expired - Lifetime US3073931A (en) 1959-09-24 1959-09-24 Compressed-gas circuit interrupter

Country Status (4)

Country Link
US (1) US3073931A (de)
CH (1) CH396144A (de)
DE (1) DE1150134B (de)
FR (1) FR1274686A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214546A (en) * 1961-10-12 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters having improved arc-extinguishing means
US3291950A (en) * 1961-03-27 1966-12-13 Siemens Ag Synchronous-type fluid-blast circuit interrupters having spaced nozzleshaped contacts
US3839612A (en) * 1973-08-08 1974-10-01 Gen Electric Vacuum-type circuit breaker comprising series-connected vacuum interrupters within a grounded tank
US4050091A (en) * 1976-09-02 1977-09-20 Goettel John H Manually-controlled pneumatically-actuated electric motor starter system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT985690B (it) * 1973-06-14 1974-12-10 Magrini Fab Riun Scarpa Camera di interruzione per interrut tori elettrici a gas compresso auto soffiante

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766348A (en) * 1953-04-28 1956-10-09 Asea Ab Compressed air breaker
US2824937A (en) * 1954-12-30 1958-02-25 Westinghouse Electric Corp Circuit interrupters
US2856480A (en) * 1953-03-10 1958-10-14 Licentia Gmbh High voltage switch
US2924690A (en) * 1954-12-24 1960-02-09 Westinghouse Electric Corp Circuit interrupters
US2936355A (en) * 1957-06-21 1960-05-10 Ite Circuit Breaker Ltd Latch means for recirculating gas blast interrupters

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE628853C (de) * 1933-10-20 1936-04-17 Siemens Schuckertwerke Akt Ges Schalter mit Mehrfachunterbrechung und Lichtbogenloeschung durch eine im Kreislauf bewegte und wiederholt zum Loeschen benutzte Gas- oder Dampfmenge
DE695077C (de) * 1933-10-20 1940-08-15 Siemens Schuckertwerke Akt Ges Schalter mit Lichtbogenloeschung durch eine im Kreislauf bewegte und wiederholt zum Loeschen benutzte Gas- oder Dampfmenge
DE691131C (de) * 1933-11-19 1940-05-18 Siemens Schuckertwerke Akt Ges Schalter mit Lichtbogenloeschung durch eine im Kreislauf bewegte und wiederholt zum Loeschen benutzte Gas- oder Dampfmenge
DE633818C (de) * 1934-05-10 1936-08-07 Siemens Schuckertwerke Akt Ges Schalter mit Lichtbogenloeschung durch ein stroemendes bzw. expandierendes gas- oder dampffoermiges Loeschmittel
BE512921A (de) * 1951-07-19

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856480A (en) * 1953-03-10 1958-10-14 Licentia Gmbh High voltage switch
US2766348A (en) * 1953-04-28 1956-10-09 Asea Ab Compressed air breaker
US2924690A (en) * 1954-12-24 1960-02-09 Westinghouse Electric Corp Circuit interrupters
US2824937A (en) * 1954-12-30 1958-02-25 Westinghouse Electric Corp Circuit interrupters
US2936355A (en) * 1957-06-21 1960-05-10 Ite Circuit Breaker Ltd Latch means for recirculating gas blast interrupters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291950A (en) * 1961-03-27 1966-12-13 Siemens Ag Synchronous-type fluid-blast circuit interrupters having spaced nozzleshaped contacts
US3214546A (en) * 1961-10-12 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters having improved arc-extinguishing means
US3839612A (en) * 1973-08-08 1974-10-01 Gen Electric Vacuum-type circuit breaker comprising series-connected vacuum interrupters within a grounded tank
US4050091A (en) * 1976-09-02 1977-09-20 Goettel John H Manually-controlled pneumatically-actuated electric motor starter system

Also Published As

Publication number Publication date
DE1150134B (de) 1963-06-12
FR1274686A (fr) 1961-10-27
CH396144A (de) 1965-07-31

Similar Documents

Publication Publication Date Title
US2748226A (en) Compressed-gas circuit interrupter
US3052783A (en) Compressed-gas circuit interrupters
US3150245A (en) Liquefied gas circuit interrupters
US2981815A (en) Circuit interrupter
US3033962A (en) Circuit interrupters
US3009042A (en) Circuit interrupters
US3075060A (en) Circuit interrupters
US2981814A (en) Circuit interrupters
US3214550A (en) Circuit interrupters with crossbars captively related to piston structures
US2965735A (en) Compressed-gas circuit interrupter
US3073931A (en) Compressed-gas circuit interrupter
US2401008A (en) Circuit interrupter
US3045086A (en) Circuit interrupters
US2420889A (en) Circuit interrupter
US3110791A (en) Circuit interrupter with pressure-generating and interrupting contacts in insulating interrupting tube
US3043940A (en) Compressed-gas circuit interrupter
US3159731A (en) Switch with plural actuator devices having improved overtravel takeup for plural electrical interrupters
US3275778A (en) Compressed-gas circuit interrupter with pressurized arcing chamber and downstream blast valve
US4075447A (en) Double-puffer-type compressed-gas circuit-interrupter constructions
US3290469A (en) Compressed-gas circuit interrupter having cavitation means
US2924690A (en) Circuit interrupters
US3381101A (en) Cross-blast circuit breakers with positive coordination between contact members and puffer structure
US3214545A (en) Fluid-blast circuit interrupters with pressure-actuated fluid directors
US3379849A (en) Dual-pressure gas-blast circuit breaker with piston means and interrupting unit in closed tank
US3590187A (en) Separable contact and blast-valve structure for a compressed-gas circuit breaker