US2981815A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2981815A
US2981815A US701756A US70175657A US2981815A US 2981815 A US2981815 A US 2981815A US 701756 A US701756 A US 701756A US 70175657 A US70175657 A US 70175657A US 2981815 A US2981815 A US 2981815A
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US
United States
Prior art keywords
gas
arc
tank
pressure
sealed
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
US701756A
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English (en)
Inventor
Winthrop M Leeds
Alva A Johnson
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 US701756A priority Critical patent/US2981815A/en
Priority to DEW24543A priority patent/DE1062312B/de
Priority to GB38791/58A priority patent/GB849869A/en
Priority to CH6698758A priority patent/CH375416A/de
Priority to FR781212A priority patent/FR1218488A/fr
Application granted granted Critical
Publication of US2981815A publication Critical patent/US2981815A/en
Anticipated expiration legal-status Critical
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
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/10—Bushing with current transformers

Definitions

  • This invention relates to circuit interrupters in general and, more particularly, to circuit intermpters of the compressed-gas type.
  • a general object of the invention is to provide an improved compressed-gas circuit interrupter, which will be more elective than circuit interrupters of the prior art, and will render improved operation over a wide range of current and voltage ratings.
  • a more specific object of the invention is to provide an improved compressed-gas circuit interrupter utilizing a sealed are-extinguishing unit containing a sealed gas at relatively high pressure, which gas possesses the properties of being a good arc-quenching gas.
  • Another object is to provide an improved compressedgas circuit interrupter of the type specified in the irnmediately preceding paragraph, in which the sealed arcextinguishing unit is positioned within a surrounding, substantially closed enclosure containing a gas at a lower pressure.
  • the gas at high pressure within the sealed arcextinguishing unit will be most effective for arc extinction, whereas the gas at a relatively low pressure within the surrounding enclosure may be designed particularly for voltage-withstanding ability at the lower pressure, to reduce the cost required for filling the enclosure and to eliminate the necessity for stronger tank walls of the enclosure.
  • a further object of the present invention is to provide a sealed arc-extinguishing unit containing gas at a relatively high pressure, which unit is supported at one end of a supporting terminal bushing; and a high-pressure reservoir is disposed at the other end of said terminal bushing, with passage means allowing intercommunication between the high-pressure reservoir and the sealed arc-extinguishing unit at high pressure.
  • a high-pressure gauge may be associated with the high-pressure reservoir, so that when the enclosed tank construction is employed, the pressure gauge, being external to said tank, will be visible to station personnel.
  • Yet a further object of the invention is to provide an improved compressed-gas circuit interrupter of the grounded-tank type, in which a pair of terminal bushings extend interiorly within a grounded metallic tank, wherein the terminal bushings support within the tank high-pressure, sealed arc-extinguishing units, and the ambient gas pressure within the surrounding tank may be at a lower pressure, being designed purely for the voltage-withstanding ability.
  • Another object is to provide an improved compressedgas circuit interrupter of the dead-tank type, as specified in the immediately preceding paragraph, wherein checkvalve means are associated with each of the supporting terminal bushings, so that the gas at relatively low pressure within the dead tank may leak into the interior of the terminal bushings to improve their voltage-withstanding ability.
  • a further object of the present invention is to render ICC compressed-gas interrupting units suitable for application within a dead-tank construction, wherein by the means of sealed units different gases may be employed within the dead tank and in the sealed unit, or the same gas may be used at different pressures.
  • Figure l is a vertical sectional view, with one unit in side elevation, taken through a compressed-gas circuit interrupter, embodying the principles of the present nvention, with the contact structure being illustrated in the partly open-circuit position;
  • Fig. 2 is an enlarged, fragmentary, vertical sectional view of the left-hand arc-extinguishing unit of Fig. l, with the actuating linkage being illustrated in the closedcircuit position;
  • Pig. 3 is a considerably enlarged, fragmentary view, in vertical cross-section, through a portion of the terminal bushing mounting flange, illustrating, to an enlarged scale, the ball check valve for permitting entrance of gas from the tank to the region within the terminal bushlng.
  • the reference numeral 1 generally designates a compressed-gas type of circuit interrupter, including a surrounding enclosure, or metal tank 2, enclosing a pair of sealed, arc-extinguishing units 4.
  • the arc-extinguishing units 4 depend from the lower interior ends of a pair of terminal bushings, generally designated by the reference numeral 5, which extend downwardly through the top of the grounded, dead tank 2.
  • each arc-extinguishing unit 4 includes an upper closure cap 6, having an integrally formed, downwardly projecting, stationary contact 7.
  • the stationary contact 7 cooperates with a movable contact 8, the latter being extended downwardly to form a piston rod 9, to effect vertical, reciprocal movement of a pumping piston 10.
  • the pumping piston 10 contains a plurality of diagonally extending passages 11, which permit communication between the region 12 below the piston 10 and the region 13 above the piston 10.
  • the insulating, upstanding, operating cylinder 16 has its lower end closed by an apertured, metallic, partition plate 17, the latter being affixed to the side insulating wall 18 of the arc-extinguishing unit 4.
  • a plurality of openings 19, provided in the partition plate 17, permit gas communication between the upper and lower sides of the partition plate 17.
  • an operating linkage generally designated by the reference numeral 21.
  • This operating linkage 21 may be of any desired type, but it is preferable to provide for straightline movement of the movable contact 8 and the pumping piston 1i). This is brought about by the provision of a floating link 22, pivotally connected at 23 to the lower end of the piston rod 9.
  • the other end of the Heating link 22 is pivotally connected, as at 24, to the lower end of a guide link 25, the upper end of which is pivotally connected at 26 to a laterally jutting, bifurcated bracket 27 ixedly secured to the lower closure cap 28 of the areextinguishing unitA.
  • a crank-arm 29 is keyed to a Patented Apr. 25, 1961 horizontally extending, drive shaft 30, the latter extending laterally out of a lower projecting portion 31 of'thc lower closure cap or mechanism housing 28. Since it is desiredto use the same gas within the tank 2 and within unit 4 at dlerent pressures, or, different gases in someY applications, the drive shaft 30 is sealed in a gastight manner as it passes out of the lower portion 31 of mechanism housing 28. Any suitable seal may be employed for the opposite ends of the drive shaft 30 for the ends thereof, which extend through lateral openings in the lower projecting portion 31 of lower housing cap 28.
  • crank arm 34 Fixedly keyed to the opposite ends of the drive shaft 30 is a bifurcated crank arm 34, the furcations 35 of which are secured to the outer ends of drive shaft 30.
  • the crank arm 34 has a bifurcated configuration at its lower extremity to accommodate a drive roller 36.
  • the drive rollers 36 for the two serially related, arc-extinguishing units 4 are engaged by the opposite ends of a conducting crossbar, or bridging member 37, the latter being reciprocally operated in a vertical direction during the opening and closing movements of the interrupter 1.
  • the actuating member or conducting crossbar 37 is actuated by a lift rod 38, formed of insulating material, and having its upper end connected to any suitable operating mechanism. Since this operating mechanism may be of any suitable type, it is not described herein.
  • Each terminal bushing includes a hollow terminal stud 40, which defines a passage means 41 permitting intercommunication between a high-pressure gas reservoir 42, disposed externally of the tank 2 at the upper end of the terminal bushing 5 at high potential, and the region 43 within the upper end of the arc-extinguishing unit 4.
  • a terminal-bushing core 44 Disposed about the tubular terminal stud 40 is a terminal-bushing core 44, which may be provided by a Wrapping of a suitable paper-like material having, if desired, condenser foils interspread therewithin, to consti tute the condenser layers for the terminal bushing 5.
  • a pair of weatherproof shells 45, 46 may be disposed about the core 44 in compression, as afforded by any suitable compression-spring arrangement, disposed within the upper cap structure 42, as well known by those skilled in the terminal-bushing art.
  • interposed between the porcelain shells 45, 46 is an intermediate grounded supporting ange support 47 having laterally extending ange portions 48, 49, which, through gaskets not shown, engage the opposing inner ends of the porcelain shells 45, 46.
  • the upper closure cap 6 for the unit 4 may be threadedly secured to the lower end of the tubular terminal stud 40, and, as illustrated, may bear through gaskets, not shown, against the lower end of the lower porcelain shell 46.
  • Current transformers l50 may be employed, surrounding the ground-flange support 47, for the purpose of measuring current passing through the interrupter and controlling the relaying operations.
  • a check valve Situated in the wall of the iiange sleeve 51 of the ground-flange support 47 is a check valve, generally designated by the reference numeral 52, and more clearly shown in Fig. 3 of the drawing.
  • the valve means 52 includes a ball valve 53, biased by a cornpression spring 54 over an opening 55 in fiange sleeve 51.
  • a U-shaped bracket 56 supports the comprsion spring 54, and controls the movement of the ball valve 53.
  • the circuit therethrough extends from the terminal 58 through reservoir cap 42, through tubular terminal stud 40, upper closure cap 6, stationary contact 7, movable contact 8, piston rod 9, through the conducting linkage 21 and through roller 36 to the left-hand end of the conducting crossbar 37.
  • the circuit then extends through the righthand, arc-extinguishing unit 4 in an identical manner.
  • suitable external mechanism is actuated to eiect downward, opening movement of the operating, or lift rod 38.
  • This effects downward, opening movement of the crossbar 37, permitting the accelerating compression springs 59, within the casings 18 to move the piston rods 9 downwardly so that the rollers 36 maintain contact with the crossbar 37.
  • the external mechanism is actuated to effect the raising of the lift rod 38.
  • a gas such as SP6 or SeF, as mixtures of one or both of the aforesaid gases with air, nitrogen, argon, helium, or carbon dioxide may be employed within the sealed unit 4.
  • This gas is maintaned at high gas pressure since, as known to those skilled in the art, arc-rupturing effectiveness of a gas is increased by increasing the pressure thereof.
  • the sulfur hexauoride, or the selenium hexauoride, or the aforesaid mixture may be at a pressure of say 50 to l0() pounds per square inch within the r-egion 43 of the unit 4.
  • a similar gas may be provided within the region 32 within the tank 2 at a lower pressure, say l5 to 30 pounds per square inch, or a different gas not necessarily suitable for arc quenching say, for example, perchloryluoride (ClO3F) may be employed as the dielectric gas within the main tank 2.
  • the gas disposed within the region 32 of tank 2 at the relatively low pressure may be permitted to be employed in connection with the terminal bushings 5, entering into the region 57 within the porcelain casings 45, 46 thereof, as controlled by the valve means 52.
  • a dual-pressure, dead-tank construction for a compressed-gas circuit interrupter may be applied to a steel-tank circuit interrupter filled with a high-dielectric strength gas, such as SFB at relatively low pressure, say from to 30 p.s.i., while interrupting chambers 4, sealed off from the rest of the tank 2, utilize gas at a higher pressure, say 50 to 100 p.s.i. to obtain the required arc-rupturing effectiveness.
  • a high-dielectric strength gas such as SFB at relatively low pressure, say from to 30 p.s.i.
  • the hollow terminal stud 40 communicates between the high-pressure interrupter chamber 4 and a high-pressure reservoir 42 in the terminal bushing cap.
  • interrupting action is obtained by pumping high-pressure gas through the orifice 61 around the contacts 7, S, using energy from the accelerating springs 59. These accelerating springs 59 are compressed, and the contacts 7, 8 are closed, by the operating linkage 21 operated through a sealed shaft 30 from a crank and roller 36 lifted by the main breaker cross-arm 37.
  • the low pressure within the tank 2 may be a ditferent gas from the high-pressure gas provided within the sealed arc-extinguishing units 4. This has the distinct advantage that one gas may be selected for the main tank 2 with the best dielectric properties, whereas the other gas for the units 4 may be selected for the best arc-quenching action.
  • a novel compressed-gas circuit interrupter adapted for the use of the same gas at different pressures, or different gases at diiferent pressures.
  • the gas within the tank 2 is selected for its dielectric properties, whereas the gas within the units 4 may be selected for the arc-interrupting characteristics thereof and may be maintained at a high pressure for increased arc effectiveness. Since the volume within the units 4 is relatively small, there is a saving in expense since the arcquenching gas at high pressure does not lill the large surrounding enclosure 2.
  • the invention moreover permits the use of the same gas within the tank 2, selected for its dielectric characteristics, to be employed within the terminal bushings 5, when an oil-filled bushing is not desired.
  • the reservoir 42 at the outer end of the terminal bushing may be used, of course, even though an oil-filled bushing were employed.
  • the high-pressure reservoir 42 maintains the pressure within the units 4 and also provides a ready means for pumping up the gas at high pressure within the units 4.
  • a dead-tank compressed-gas high power circuit interrupter including a grounded metallic dead tank having a pair of terminal bushings extending therein, means supporting a pair of serially related arc-extinguishing units adjacent the interior ends of said terminal bushings, a gas at relatively low pressure within said grounded tank, gas at a higher pressure disposed within said arc-extinguishing units, said arc-extinguishing units being sealed from the ambient within said tank, contact means for establishing an arc within each arc-extinguishing unit, a conducting crossbar for effecting the opening motion of said contact means, high-pressure gas reservoirs disposed at the external ends of said terminal bushings and at high potential, and passage means interconnecting said high-pressure reservoirs through said terminal bushings with the sealed arc-extinguishing units.
  • a tank-type compressed-gas circuit interrupter including a grounded metallic tank, a pair of terminal bushings extending into the tank, a pair of sealed rigid-wall pressurized gas-filled arc-extinguishing units containing a gas comprising sulfur hexauoride under pressure, the gas pressure within the sealed pressurized arc-extinguishing 1units being at least 50 pounds per square inch for highly effective interrupting performance, means supporting said pressurized rigid-wall arc-extinguishing units interiorly within the grounded tank adjacent the interior ends of the two terminal bushings, means sealing the interior of said gas-filled units from the ambient within the surrounding tank, each arc-extinguishing unit including a cylindrical insulating casing and a lower mechanism housing, contact means separable within each sealed pressurized arc-extinguishing unit to establish an arc therein, operating crank means including a sealed rotatable drive shaft extending through the rigid wall of each unit, an operating crank arm secured to each sealed drive shaft and disposed externally of the
  • a circuit interrupter of the gas-blast type including a sealed arc-extinguishing unit, gas under pressure within said sealed unit, a terminal bushing supporting said unit at one end thereof and containing ⁇ a high-pressure gas reservoir at the other end thereof at high potential, passage means within said terminal bushing connecting said high-pressure gas reservoir with said arc-extinguishing unit, piston means disposed within said unit for forcing gas through an established arc therein, and a surrounding enclosure containing gas at a diierent pressure.
  • a dead-tank compressed-gas high-power circuit interrupter including a grounded metallic dead tank having a pair of terminal bushings extending therein, a pair of serially related arc-extinguishing units supported at the interior ends of said terminal bushings, a gas at relatively low pressure within said grounded tank, gas at a higher pressure disposed within said arc-extinguishing units, said arc-extinguishing units being sealed from the ambient within said tank, Contact means for establishing an arc within each arc-extinguishing unit in the ambient of higher gas pressure, a conducting cross bar for eiecting the opening motion of said contact means, and oontinued opening movement of the conducting cross bar providing a pair of serially related isolating gaps in the circuit.
  • a highpower circuit interrupter of the compressedgas type including a grounded metallic tank pressurized with gas at a relatively low gas pressure, a pair of highvoltage terminal bushings extending interiorly within said grounded metallic tank and carrying a pair of sealed arcextinguishing units at their interior ends, a conducting cross bar for electrically interconnecting the two arc-extinguishing units, each arc-extinguishing unit being pressurized with a relatively high pressure gas, at least a pair of separable contacts within each arc-extinguishing unit separable within high-pressure gas, spring means associated with each arc-extinguishing unit responsive to opening motion of the conducting cross bar for eiecting opening separation of each pair of separable contacts, and continued opening movement of the conducting cross bar providing Ia pair of serially related isolating gaps in the circuit.

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  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
US701756A 1957-12-10 1957-12-10 Circuit interrupter Expired - Lifetime US2981815A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US701756A US2981815A (en) 1957-12-10 1957-12-10 Circuit interrupter
DEW24543A DE1062312B (de) 1957-12-10 1958-11-28 Druckgas-Leistungsschalter
GB38791/58A GB849869A (en) 1957-12-10 1958-12-02 Improvements in or relating to electric circuit interrupters
CH6698758A CH375416A (de) 1957-12-10 1958-12-05 Leistungsschalter
FR781212A FR1218488A (fr) 1957-12-10 1958-12-09 Disjoncteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US701756A US2981815A (en) 1957-12-10 1957-12-10 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2981815A true US2981815A (en) 1961-04-25

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US701756A Expired - Lifetime US2981815A (en) 1957-12-10 1957-12-10 Circuit interrupter

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US (1) US2981815A (de)
CH (1) CH375416A (de)
DE (1) DE1062312B (de)
FR (1) FR1218488A (de)
GB (1) GB849869A (de)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097280A (en) * 1958-12-23 1963-07-09 Siemens Ag Partitioned gas-filled electrical apparatus
US3099770A (en) * 1961-05-31 1963-07-30 Westinghouse Electric Corp Lightning arresters
US3118966A (en) * 1960-11-21 1964-01-21 Westinghouse Electric Corp Electrical apparatus
US3123698A (en) * 1961-02-10 1964-03-03 Circuit breakers having interrupting contacts
US3160701A (en) * 1960-11-14 1964-12-08 Westinghouse Electric Corp Electrical apparatus
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit
US3214543A (en) * 1960-12-07 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters using one gas for interruption and another gas for isolation
US3214542A (en) * 1961-04-11 1965-10-26 Westinghouse Electric Corp Circuit interrupters with pressurized interrupting assemblage and synchronized disconnecting means
US3214551A (en) * 1962-01-02 1965-10-26 Gen Electric Co Ltd Gas-blast circuit interrupter with gas reservoir inclosed in supporting terminal bushing
US3221129A (en) * 1960-04-29 1965-11-30 Reyrolle A & Co Ltd Gas-blast circuit breaker of the recirculating gas type
US3235695A (en) * 1961-06-26 1966-02-15 Asea Ab Air blast circuit breaker with damping resistor in parallel with the main breaking gap
US3268696A (en) * 1963-10-30 1966-08-23 S & C Electric Co Circuit interrupter having vacuum type interrupter in insulating gas filled housing
US3270173A (en) * 1963-11-21 1966-08-30 Gen Electric Gas blast circuit breaker of the axial blast type with means for injecting a high velocity gas jet
US3303309A (en) * 1963-05-14 1967-02-07 Ass Elect Ind Series connected switches of different types
US3405325A (en) * 1964-11-07 1968-10-08 Calor Emag Elek Zitats Ag High tension switching station
US3462545A (en) * 1967-01-13 1969-08-19 Westinghouse Electric Corp Condenser bushing
US3743804A (en) * 1971-03-05 1973-07-03 Nvcoq Metal clad electric distribution and switching plants for high voltages
US3830992A (en) * 1972-12-26 1974-08-20 Ite Imperial Corp Minimum oil interrupter in dead tank bulk oil power circuit breaker construction
US3921116A (en) * 1974-04-29 1975-11-18 Rte Corp Sand filled - SF{HD 6 {B fused bushing
US3947650A (en) * 1974-01-09 1976-03-30 International Telephone And Telegraph Corporation Gas-insulated switch for an underground power distrubution system
CN112701004A (zh) * 2020-12-07 2021-04-23 河南平高电气股份有限公司 隔离接地开关弧触头底座及隔离接地开关
CN112701005A (zh) * 2020-12-07 2021-04-23 河南平高电气股份有限公司 一种组合式电联接及使用该电联接的隔离接地开关

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2050727A5 (de) * 1969-06-23 1971-04-02 Latour Andre

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US1313856A (en) * 1919-08-19 Circuit-interrupter
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US1706746A (en) * 1924-03-17 1929-03-26 Gen Electric Electric switch
US1783279A (en) * 1926-10-30 1930-12-02 Condit Electrical Mfg Corp Circuit interrupter
FR696259A (fr) * 1929-09-11 1930-12-29 Alsthom Cgee Perfectionnement apporté aux interrupteurs électriques fonctionnant dans un gaz
US1801736A (en) * 1926-10-30 1931-04-21 Condit Electrical Mfg Corp Oil-immersed vacuum-type switch
DE533476C (de) * 1926-04-11 1931-09-19 Siemens Schuckertwerke Akt Ges Einrichtung zum Ausschalten starker Wechselstroeme mit einem OElschalter unter Gegenwirkung eines umlaufenden Motors
GB377034A (en) * 1930-10-26 1932-07-21 Siemens Ag Improvements in or relating to high tension switches
US1935228A (en) * 1930-12-07 1933-11-14 Bbc Brown Boveri & Cie Electric circuit breaker
US2056009A (en) * 1933-04-10 1936-09-29 Gen Electric Electric circuit interrupter
US2160660A (en) * 1937-09-23 1939-05-30 Gen Electric High potential terminal
GB519821A (en) * 1938-09-26 1940-04-08 Gen Electric Co Ltd Improvements in or relating to electrical apparatus comprising parts for containing liquid having electrical insulating properties
US2291357A (en) * 1940-06-08 1942-07-28 Gen Electric Electric circuit breaker
US2643315A (en) * 1949-08-18 1953-06-23 Asea Ab Arrangement in electric air blast circuit breaker

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Publication number Priority date Publication date Assignee Title
DE295226C (de) *
US1313856A (en) * 1919-08-19 Circuit-interrupter
US1706746A (en) * 1924-03-17 1929-03-26 Gen Electric Electric switch
DE430968C (de) * 1925-02-01 1926-06-28 Paul Meyer A G Dr Hochleistungsschalter
DE533476C (de) * 1926-04-11 1931-09-19 Siemens Schuckertwerke Akt Ges Einrichtung zum Ausschalten starker Wechselstroeme mit einem OElschalter unter Gegenwirkung eines umlaufenden Motors
US1801736A (en) * 1926-10-30 1931-04-21 Condit Electrical Mfg Corp Oil-immersed vacuum-type switch
US1783279A (en) * 1926-10-30 1930-12-02 Condit Electrical Mfg Corp Circuit interrupter
FR696259A (fr) * 1929-09-11 1930-12-29 Alsthom Cgee Perfectionnement apporté aux interrupteurs électriques fonctionnant dans un gaz
GB377034A (en) * 1930-10-26 1932-07-21 Siemens Ag Improvements in or relating to high tension switches
US1935228A (en) * 1930-12-07 1933-11-14 Bbc Brown Boveri & Cie Electric circuit breaker
US2056009A (en) * 1933-04-10 1936-09-29 Gen Electric Electric circuit interrupter
US2160660A (en) * 1937-09-23 1939-05-30 Gen Electric High potential terminal
GB519821A (en) * 1938-09-26 1940-04-08 Gen Electric Co Ltd Improvements in or relating to electrical apparatus comprising parts for containing liquid having electrical insulating properties
US2291357A (en) * 1940-06-08 1942-07-28 Gen Electric Electric circuit breaker
US2643315A (en) * 1949-08-18 1953-06-23 Asea Ab Arrangement in electric air blast circuit breaker

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097280A (en) * 1958-12-23 1963-07-09 Siemens Ag Partitioned gas-filled electrical apparatus
US3221129A (en) * 1960-04-29 1965-11-30 Reyrolle A & Co Ltd Gas-blast circuit breaker of the recirculating gas type
US3160701A (en) * 1960-11-14 1964-12-08 Westinghouse Electric Corp Electrical apparatus
US3118966A (en) * 1960-11-21 1964-01-21 Westinghouse Electric Corp Electrical apparatus
US3214543A (en) * 1960-12-07 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters using one gas for interruption and another gas for isolation
US3123698A (en) * 1961-02-10 1964-03-03 Circuit breakers having interrupting contacts
US3214542A (en) * 1961-04-11 1965-10-26 Westinghouse Electric Corp Circuit interrupters with pressurized interrupting assemblage and synchronized disconnecting means
US3099770A (en) * 1961-05-31 1963-07-30 Westinghouse Electric Corp Lightning arresters
US3235695A (en) * 1961-06-26 1966-02-15 Asea Ab Air blast circuit breaker with damping resistor in parallel with the main breaking gap
US3214551A (en) * 1962-01-02 1965-10-26 Gen Electric Co Ltd Gas-blast circuit interrupter with gas reservoir inclosed in supporting terminal bushing
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit
US3303309A (en) * 1963-05-14 1967-02-07 Ass Elect Ind Series connected switches of different types
US3268696A (en) * 1963-10-30 1966-08-23 S & C Electric Co Circuit interrupter having vacuum type interrupter in insulating gas filled housing
US3270173A (en) * 1963-11-21 1966-08-30 Gen Electric Gas blast circuit breaker of the axial blast type with means for injecting a high velocity gas jet
US3405325A (en) * 1964-11-07 1968-10-08 Calor Emag Elek Zitats Ag High tension switching station
US3462545A (en) * 1967-01-13 1969-08-19 Westinghouse Electric Corp Condenser bushing
US3743804A (en) * 1971-03-05 1973-07-03 Nvcoq Metal clad electric distribution and switching plants for high voltages
US3830992A (en) * 1972-12-26 1974-08-20 Ite Imperial Corp Minimum oil interrupter in dead tank bulk oil power circuit breaker construction
US3947650A (en) * 1974-01-09 1976-03-30 International Telephone And Telegraph Corporation Gas-insulated switch for an underground power distrubution system
US3921116A (en) * 1974-04-29 1975-11-18 Rte Corp Sand filled - SF{HD 6 {B fused bushing
CN112701004A (zh) * 2020-12-07 2021-04-23 河南平高电气股份有限公司 隔离接地开关弧触头底座及隔离接地开关
CN112701005A (zh) * 2020-12-07 2021-04-23 河南平高电气股份有限公司 一种组合式电联接及使用该电联接的隔离接地开关

Also Published As

Publication number Publication date
FR1218488A (fr) 1960-05-11
GB849869A (en) 1960-09-28
CH375416A (de) 1964-02-29
DE1062312B (de) 1959-07-30

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