US3158723A - Arc-extinguishing means for power switches having stationary and movable contact pieces - Google Patents

Arc-extinguishing means for power switches having stationary and movable contact pieces Download PDF

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Publication number
US3158723A
US3158723A US93252A US9325261A US3158723A US 3158723 A US3158723 A US 3158723A US 93252 A US93252 A US 93252A US 9325261 A US9325261 A US 9325261A US 3158723 A US3158723 A US 3158723A
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United States
Prior art keywords
fluid
arc
contact
piston
contact pieces
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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
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US93252A
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English (en)
Inventor
Buechner Gerhard
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.)
Maschinenfabrik Oerlikon AG
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Maschinenfabrik Oerlikon AG
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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
    • H01H33/70—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
    • H01H33/92—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 liquid, e.g. oil
    • 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
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/75—Liquid-break switches, e.g. oil-break

Definitions

  • GKRHARD BUEOINER ATTORIYIF 3,158,723 ES HAVING 1964
  • a pump piston moving with the contact pin can produce a fluid flow which washes the tip of said pin.
  • Another known possibility is the injection of the arc quenching fluid into the extinction chamber, by a displacement brought about by the moving pin itself.
  • Pump pistons provided with a special drive mechanism are also used for this purpose.
  • a further method consists in producing an auxiliary are for building up the pressure, wnereby a fluid flow aimed the principal arc may be a nod. The last-mentioned method has the disadvantage that it depends on the intensity of the arc-current.
  • gap between these two tubes leads to an annular nozzle in the vicinity of a pair of stati nary contact pieces, and said gap has a further communication to the interior of the extinguishing means the vicinity of a pair of movable contact pieces which cause at least two fluid currents.
  • a iiange provided with a ter iinal or point of current supply is screwed to the upper lio'.
  • a metallic sleeve which holds the exterior insulating tube in the latter is disposed an intermediate tube also made of insulating material.
  • the tube 5, together with an interior insulating tube 5, forms a plurality of channels and betwce these tubes. This communication terminates at its upper end in an inwar y directed annular nozzle-like gap 9/.
  • openings 7 lead to the interior of the tube 4.
  • Tube t at its lower end is closed by the metallic sleeve 19 and a flange screwed thereto which comprises a terminal or point of current supply ll.
  • the movable contact piece includes also a central part i? which is positioned in body 15 in the switch-on s. without, however, carrying any substantial current on. account of the great contact resistance.
  • a piston defining formation 21. s e a cylinder within which the piston 21 moves. This der is filled with quenchi g fluid. From rod 1- electric current is cond'cc contact piece is and the inter, iezliate piece to the current terminal it. in a housing is disposed the mechanism for moving rod 16, which may co suitable means.
  • Upper housing 1 is suitably for a butter chamber or may contain npers tors of known type.
  • a limiting pin 112 (Fl 1) may be provided.
  • the nozzle 13 has the particul rly important function of screening the hot spot at the are base (which still emits electrons long after the arc been cxtin guished), with the aid of the advanced cold nozzle rim.
  • tubular stationary contacts 25, 26 are provided in place of the laminated contact pieces 14, 18 of FIGS. 1 t0 3, and the movable contact head as well as the switch rod is formed as a tubular contact piece 27.
  • Pin 17 corresponds to the former design, While in the former example, however, the piston producing the quenching fluid flow was an integral part of the reciprocable switch rod, 21 fixed piston 2% is used here. It is, however, also possible to use a piston which is driven in the opposite direction by the contact tube, for example by means of any suitable reversing gear.
  • the other structural components correspond to those of FIG. 1, and the mode of operation of the example shown in FIG. 4 is as follows:
  • contact tube 27 As soon as contact tube 27 through any suitable driving mechanism (not sh wn) is mo ed downwardly from the switch-on position, it displaces fluid from its interior due to the action of fixed piston 23, and the fluid flows along pin 17.
  • the fluid present in the space between tube 6 and tube 27 is forced by a collar 29 on the outside of tube 27, which collar slides snugly in tube 6, through the openings 7, channels 8 and gap past nozzle contact 13 and through the opening in latter into the buffer chamber Further, when contact tube 27 moves into the drive housing as, the fluid present in the latter is displaced and flows through compensating bores 31, the openings 7, channels 8 and gap 9 to the fixed contact pieces 13 and 25.
  • a cap 35 having a central bore as is movable in contact tube 27.
  • the lower edge of the cap is provided with a plurality of openings 37.
  • the position shown corresponds to the position of contact tube 27 at the end of the switch-off movement.
  • a bottom lug 30 of contact pin 1'7 has entered a damping bore of fixed piston 28.
  • Bores 4d disposed laterally of pin 17 serve for letting quenching fluid flow from the space above piston During the switch-off movement, the displaced fluid flows through the bores 4% along pin 27 and through bore as of cap 3 into the quenching space.
  • the openings 37 are closed by a bulge ti on contact tube 2".
  • openings serve for providing, during the switching-on movement, a possibility or reverse flow for the fluid present in front of cap 35, as then bore 36 in depressed cap 35 is fully occupied and closed by pin 17.
  • the collar 29 provided on contact tube again produces, during the switch-off movement, the second fluid current through the openings 7, channels 3 and gap 9 to the fixed contact pieces.
  • the compensating bores 31 in the lower metallic body Til allow the fluid to balance its pressure in the channels 8 and the drive housing What I claim as new and desire to secure by Letters Patent, is:
  • An electric switch including stationary and movable contact pieces and arc-quenching means, each of said contact pieces comprising a central arc-carrying contact and an annular current-carrying contact surrounding and spaced from said central contact; said current-carrying contacts being adapted to engage to close the switch and to disengage to open the switch, disengagement of said currentcarrying contacts engendering an are between them; said arc-quenching means includedin an annular nozzle surrounding said current-carrying contacts, means for directing a fluid blast through said nozzle toward the interior of said annular contacts in order to shift the are from said current-carrying contacts to said arccarryiug contacts, and means for directing a fluid blast along the of said current-carrying contacts after said nozzle-directed blast has been effective long enough to shift the arc, said fluid-directing means including a piston movable with said movable contact piece and a cylinder within which said piston moves, the interior surface of the cylinder having annular recesses so spaced that during the

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Circuit Breakers (AREA)
US93252A 1960-03-16 1961-03-03 Arc-extinguishing means for power switches having stationary and movable contact pieces Expired - Lifetime US3158723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH298560A CH380212A (de) 1960-03-16 1960-03-16 Löscheinrichtung für Leistungsschalter mit feststehenden und bewegten Kontakten

Publications (1)

Publication Number Publication Date
US3158723A true US3158723A (en) 1964-11-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US93252A Expired - Lifetime US3158723A (en) 1960-03-16 1961-03-03 Arc-extinguishing means for power switches having stationary and movable contact pieces

Country Status (4)

Country Link
US (1) US3158723A (es)
CH (1) CH380212A (es)
ES (1) ES265470A1 (es)
GB (1) GB919798A (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257532A (en) * 1962-12-17 1966-06-21 Sprecher & Schuh Ag Arc-extinguishing circuit-breakers
US3639712A (en) * 1969-08-12 1972-02-01 Merlin Gerin Gas blast circuit interrupter having conducting orifice means
US3670125A (en) * 1970-04-16 1972-06-13 Magrini Fabbriche Ruinite Magr Blast nozzle for self-blasting compressed gas electric circuit-breakers
US3721787A (en) * 1970-05-22 1973-03-20 Bbc Brown Boveri & Cie Minimum fluid circuit breaker including stroke-dependent injection of quenching fluid into switch contact chamber
US4123637A (en) * 1976-12-27 1978-10-31 Siemens-Allis, Inc. High voltage air disconnect switch incorporating a puffer-type load break switch
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
US4296289A (en) * 1978-04-19 1981-10-20 Sprecher & Schuh Ag Electric gas-blast switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
US2304529A (en) * 1940-05-15 1942-12-08 Westinghouse Electric & Mfg Co Circuit interrupter
US2365132A (en) * 1941-09-25 1944-12-12 Reyrolle A & Co Ltd Electric circuit breaker of the gas-blast type
CH267793A (de) * 1945-07-06 1950-04-15 Oerlikon Maschf Druckgasschalter für hohe Ströme.
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2599848A (en) * 1942-05-30 1952-06-10 Latour Andre Spark arrester for pressure gas switches

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
US2304529A (en) * 1940-05-15 1942-12-08 Westinghouse Electric & Mfg Co Circuit interrupter
US2365132A (en) * 1941-09-25 1944-12-12 Reyrolle A & Co Ltd Electric circuit breaker of the gas-blast type
US2599848A (en) * 1942-05-30 1952-06-10 Latour Andre Spark arrester for pressure gas switches
CH267793A (de) * 1945-07-06 1950-04-15 Oerlikon Maschf Druckgasschalter für hohe Ströme.
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257532A (en) * 1962-12-17 1966-06-21 Sprecher & Schuh Ag Arc-extinguishing circuit-breakers
US3639712A (en) * 1969-08-12 1972-02-01 Merlin Gerin Gas blast circuit interrupter having conducting orifice means
US3670125A (en) * 1970-04-16 1972-06-13 Magrini Fabbriche Ruinite Magr Blast nozzle for self-blasting compressed gas electric circuit-breakers
US3721787A (en) * 1970-05-22 1973-03-20 Bbc Brown Boveri & Cie Minimum fluid circuit breaker including stroke-dependent injection of quenching fluid into switch contact chamber
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
US4123637A (en) * 1976-12-27 1978-10-31 Siemens-Allis, Inc. High voltage air disconnect switch incorporating a puffer-type load break switch
US4296289A (en) * 1978-04-19 1981-10-20 Sprecher & Schuh Ag Electric gas-blast switch

Also Published As

Publication number Publication date
ES265470A1 (es) 1961-06-16
GB919798A (en) 1963-02-27
CH380212A (de) 1964-07-31

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