US3257532A - Arc-extinguishing circuit-breakers - Google Patents

Arc-extinguishing circuit-breakers Download PDF

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Publication number
US3257532A
US3257532A US328704A US32870463A US3257532A US 3257532 A US3257532 A US 3257532A US 328704 A US328704 A US 328704A US 32870463 A US32870463 A US 32870463A US 3257532 A US3257532 A US 3257532A
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United States
Prior art keywords
cylinder
stationary
piston means
stationary cylinder
circuit
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
US328704A
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English (en)
Inventor
Lerch Hans Werner
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh AG
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Filing date
Publication date
Application filed by Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Application granted granted Critical
Publication of US3257532A publication Critical patent/US3257532A/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7053—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having a bridging element around two hollow tubular 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
    • H01H33/02—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
    • 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

Definitions

  • lt is, therefore, a primary object of the present invention to'provide an improved construction of gas-blast switch, circuit-breaker or the like wherein the extinguishing effect is greatly improved and therewith its eilciency is increased.
  • a further important object of the present invention resides in the provision of an improved circuit-breaker or switch of the type described manifested by its relatively simple construction, yet highly reliable operation, particularly with respect to the arc-extinguishing function.
  • the present invention contemplates the provision of an improved gas-blast circuit-breaker incorporating an extinguishing compartment or chamber arranged in a housing closed at all sides, preferably lled with electronegative gases, and wherein a current or stream of extinguishing medium is generated by means of a pump piston due to the switching movement.
  • the extinguishing chamber is provided with a stationary cylinder encirculing stationary contacts as Well as a movable cylinder operatively connected to the pump piston, said movable cylinder being capable of sliding past the aforesaid stationary cylinder.
  • the pump piston has seated thereon a sealing piston which partially encloses a movable contact and which in the circuit-closing position of .the circuit-breaker seals the stationary cylinder from the pump piston. Moreover, upon opening the circuitbreaker this sealing piston first then moves out of the stationary cylinder when the movable contact has moved through a path favorable for arc-extinguishing, and prior to reaching the terminal switching-out position the movable cylinder slides past the stationary cylinder, whereby .a chamber appears between the open confronting ends of both of these cylinders which ⁇ is completely lled by extinguishing medium. 4
  • FIGURE l is a sectional view through the active portion of a gas-blast circuit-breaker or switch constructed according to the invention provided with contactsv and depicted in closed-circuit condition, and which can continuously conduct the rated current;
  • FIGURE 2 depicts a modifications of the circuitbreaker of FIGURE l designed for handling larger rated currents and provided with additional parallel contacts, such circuit-breaker being illustrated in closed circuit position;
  • FIGURE 3 illustrates the circuit-breaker of FIGURE 2 in an intermediate operating position
  • FIGURE 4 illustrates the circuit-breaker of FIGURE 2 in its open circuit position.
  • a housing 1 is advantageously closed at all sides and preferably filled with electro-negative gases, for example SP6 (sulphur hexauoride).
  • a connecting terminal 2 conducts the current to stationary contacts 3.
  • a movable contact 4 is displaced by means of any suitable actuating mechanism (not shown) and is rigidly operably connected with a pump piston 5 adapted to slide within pump cylinder 6.
  • the actual extinguishing chamber of the circuit-breaker or switch in accordance with the invention, embodies a stationary cylinder 7 encircling the stationary contacts 3 and a movable cylinder 8 erected at the pump piston 5.
  • This movable cylinder 8 can advantageously telescopically slide past the stationary cylinder 7, as will be more fully explained hereinafter.
  • a sealing piston 9 is seated upon the pump piston 5 and partially encloses the movable contact 4, and in the closed-circuit position of the circuit-breaker obturates the stationary cylinder 7 in the direction of the pump piston 5.
  • slide contacts l0 At the inner wall of the pump cylinder 6 there are arranged slide contacts l0;
  • the entire current ilows from the connecting terminal 2 via the stationary contacts 3, the movable contact 4, the slide contacts 10 and the pump cylinder 6 to the other connnecting terminal 11 operatively associated with the aforesaid pump cylinder 6.
  • suitable openings or ports 12 are providedrat the pump piston 5, and in the Wall of the pump cylinder 6 there is arranged a one-way or nonreturn valve 13 which, as should be apparent, closes in the presence of internal pressure within pump cylinder 6.
  • switches or circuit-breakers are to be designed for rated currents which are so large that they can no longer be continuously conducted by the switch contacts themselves, then the provision of additional parallel contacts comes under donsideratidn.
  • Such a construction of circuit-breaker is shown in the variant embodiment of FIGURES 2, 3 and 4. Since the basic construction of the physical structure of this embodiment is quite similar to that previously described in conjunction with the embodiment of FIGURE l, like reference numerals have here again conveniently been employed for the same or analogous structure. However, in this embodiment there is provided a second current path which is parallel to the current path formed by the contacts 3, 4 and 10.
  • This second current path conducts a considerable portion of the total current coming from the connecting terminal 2 via the upper contacts 14, here shown arranged at the underside of the aforesaid connecting piece, to the movable sliding contact means 15, from there to the lower ICC URE 1 should then be apparent.
  • the slide contact means as the jacket or covering for the movable cylinder 8, as well as to arrange the lower contacts 16 directly upon the electrically conducting pump cylinder 6.
  • FIGURE 2 the switch or circuitbreaker is shown in closed-circuit condition, that is, not only are contacts .3 and 4 closed but also the parallely connected contacts 14, 15 and I6.
  • the non-illustrated actuating mechanism rapidly downwardly displaces the contact 4 together with the members 5, 8, 9 and 15.
  • FIGURE 4 illustrates the circuitbreaker in its switch-out terminal position.
  • the present invention permits achieving at least the yfollowing advantages with relatively simple constructional (a) By suitably designing the end of the sealing piston 9 at the side of the contacts 3 and by selection of its stroke or degree of penetration into the stationary cylinder 7 it is possible to conduct the stream of extinguishing gas towards the arc to be extinguished in the most effective direction and in the most favorable moment of the circuit-opening movement and, indeed, only after the extinguishing gas has already been precompressed.
  • the pump cylinder 6 consisting of electrically conductive material simultaneously serves as carrier for the contacts 10 and 16, respectively.
  • a closed housing an arc-extinguishing medium within said housing; and having within said housing: a iirst stationary cylinder open at either end; stationary first electrical contact means located interiorly of said first stationary cylinder; a movable cylinder for sliding on the outer surface of said first stationary cylinder, and defining irst and second ends, said second end being remote' from said first electrical contact means; a piston means, surrounded by said movable cylinder, in slidable, sealing engagement with the interior surface of said first stationary cylinder, and having first and second ends, said second end being remote from said rst electrical contacts; second electrical contact means, rigid with said piston means, for contacting said stationary electrical contact means; a pump piston means, rigid with said movable cylinder at said second end, for supporting said piston means at said second end of the latter, said piston means, movable cylinder, and pump piston means thus moving as a unit between a iirst end position, wherein the circuit is closed, and a second end position, where
  • said piston means, first stationary cylinder, and second electrical contact means being of such relative lengths that contact between said rst and second electrical contact means is broken first; contact between the piston means and the first stationary cylinder broken second; and contact between the first stationary and movable cylinders broken lastly, to form, before reaching the second end position, a spacing between the respective confronting ends of said tirst stationary cylinder and the movable cylinder, which spacing is substantially completely filled with said medium;
  • circuit-breaker of claim 1 including additional electrical contact means in parallel with said rst and 5 6 second contact means to provide a parallel electrical path, fourth contact means comprises an electrically conducsaid additional contact means being separated before said Uve lacke 011 the Outer Surface 0f the movable Cyllndelirst and second contact means during opening of the circuibbreaker.
  • Examiner 3 References Cited by the Examiner 3.
  • the circuit-breaker of claim 2 wherein said addi- 5 UNITED STATES PATENTS tional contact means include at least one stationary third 2,246,171 6/1941 Grosse 20o- 148 contact means, located exterior of said movable-cylinder, 2,442,010 5/ 1948 Leeds et al 200-150 and at least one fourth contact means located on the 2,933,575 4/1960 Baker 200--150 outer surface of said movable cylinder. 10 3,158,723 11/ 1964 Buechner 200-*150 4.
  • the circuit-breaker of claim 3 wherein the movable h t cylinder is of electrically insulating material and the ROBERT S' MACON Actmg Pnmmy Examm'er'

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  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
US328704A 1962-12-17 1963-12-06 Arc-extinguishing circuit-breakers Expired - Lifetime US3257532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT981362A AT236502B (de) 1962-12-17 1962-12-17 Druckgasschalter mit durch die Schaltbewegung erzeugter Löschmittelströmung

Publications (1)

Publication Number Publication Date
US3257532A true US3257532A (en) 1966-06-21

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ID=3617503

Family Applications (1)

Application Number Title Priority Date Filing Date
US328704A Expired - Lifetime US3257532A (en) 1962-12-17 1963-12-06 Arc-extinguishing circuit-breakers

Country Status (4)

Country Link
US (1) US3257532A (de)
AT (1) AT236502B (de)
CH (1) CH409060A (de)
DE (1) DE1207473B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761661A (en) * 1971-09-07 1973-09-25 Coq Utrecht Nv Gas blast circuit-breakers having cooperating tubular contact pieces
JPS48104074A (de) * 1972-03-07 1973-12-26
JPS50127181A (de) * 1974-02-18 1975-10-06
JPS50151354A (de) * 1974-05-29 1975-12-05
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
EP0011542A1 (de) * 1978-11-14 1980-05-28 Merlin Gerin Leistungsschalter mit getrennten Leistungs- und Parallelstrombahnen
US4408108A (en) * 1980-04-25 1983-10-04 Mutsubishi Denki Kabushiki Kaisha Puffer type gas interrupter
EP0240406A1 (de) * 1986-04-03 1987-10-07 Merlin Gerin Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit
US20230088430A1 (en) * 2020-02-13 2023-03-23 Supergrid Institute Mechanical current cut-off device for high-voltage direct current with a capacitor in a secondary path, facility and method using such a device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1241892B (de) * 1965-01-13 1967-06-08 Friedrich Hartig Hochspannungs-Unterbrechungseinrichtung
DE1241892C2 (de) * 1965-01-13 1974-08-29 Friedrich Hartig Hochspannungs-unterbrechungseinrichtung
FR2057344A5 (de) * 1969-08-12 1971-05-21 Merlin Gerin
DE2942625A1 (de) * 1979-03-09 1981-04-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Autopneumatischer druckgasschalter
DE7906561U1 (de) * 1979-03-09 1983-05-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Autopneumatischer Druckgasschalter
CH637241A5 (en) * 1979-03-14 1983-07-15 Sprecher & Schuh Ag Sliding-contact device for a switch
CH656976A5 (de) * 1981-06-30 1986-07-31 Bbc Brown Boveri & Cie Kompressionskolbenschalter.
SE448793B (sv) * 1983-10-17 1987-03-16 Asea Ab Tryckgasbrytare

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246171A (en) * 1938-01-10 1941-06-17 Gen Electric Method of and apparatus for interrupting electric arcs
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters
US3158723A (en) * 1960-03-16 1964-11-24 Oerlikon Engineering Company Arc-extinguishing means for power switches having stationary and movable contact pieces

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378471A (en) * 1931-05-09 1932-08-09 Electr & Allied Ind Res Ass Improvements relating to electric switches or circuit breakers
DE671326C (de) * 1937-10-16 1939-02-04 Voigt & Haeffner Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
DE675370C (de) * 1938-05-24 1939-05-06 Studiengesellschaft Fuer Hochl Druckgasschalter mit Differentialkolben

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246171A (en) * 1938-01-10 1941-06-17 Gen Electric Method of and apparatus for interrupting electric arcs
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters
US3158723A (en) * 1960-03-16 1964-11-24 Oerlikon Engineering Company Arc-extinguishing means for power switches having stationary and movable contact pieces

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761661A (en) * 1971-09-07 1973-09-25 Coq Utrecht Nv Gas blast circuit-breakers having cooperating tubular contact pieces
JPS5610732B2 (de) * 1972-03-07 1981-03-10
JPS48104074A (de) * 1972-03-07 1973-12-26
JPS50127181A (de) * 1974-02-18 1975-10-06
JPS5826133B2 (ja) * 1974-02-18 1983-06-01 株式会社日立製作所 ガスフキツケガタシヤダンキ
JPS50151354A (de) * 1974-05-29 1975-12-05
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
FR2441916A1 (fr) * 1978-11-14 1980-06-13 Merlin Gerin Disjoncteur electrique a autosoufflage equipe d'un dispositif a contacts principaux perfectionnes
EP0011542A1 (de) * 1978-11-14 1980-05-28 Merlin Gerin Leistungsschalter mit getrennten Leistungs- und Parallelstrombahnen
US4309581A (en) * 1978-11-14 1982-01-05 Merlin Gerin Gas circuit breaker having independent main and arcing circuits
US4408108A (en) * 1980-04-25 1983-10-04 Mutsubishi Denki Kabushiki Kaisha Puffer type gas interrupter
EP0240406A1 (de) * 1986-04-03 1987-10-07 Merlin Gerin Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit
FR2596915A1 (fr) * 1986-04-03 1987-10-09 Merlin Gerin Disjoncteur electrique a autosoufflage ayant une tenue dielectrique elevee
US4736079A (en) * 1986-04-03 1988-04-05 Merlin Gerin Puffer type electrical circuit breaker having a high dielectric withstand
US20230088430A1 (en) * 2020-02-13 2023-03-23 Supergrid Institute Mechanical current cut-off device for high-voltage direct current with a capacitor in a secondary path, facility and method using such a device

Also Published As

Publication number Publication date
AT236502B (de) 1964-10-26
CH409060A (de) 1966-03-15
DE1207473B (de) 1965-12-23

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