US3205331A - Pump means for an electrical switch with a liquid as an arc extinguishing medium - Google Patents

Pump means for an electrical switch with a liquid as an arc extinguishing medium Download PDF

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Publication number
US3205331A
US3205331A US134941A US13494161A US3205331A US 3205331 A US3205331 A US 3205331A US 134941 A US134941 A US 134941A US 13494161 A US13494161 A US 13494161A US 3205331 A US3205331 A US 3205331A
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US
United States
Prior art keywords
liquid
switch
oil
cylinder
contact member
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
US134941A
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English (en)
Inventor
Thommen Hans
Buhler Karl
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3205331A publication Critical patent/US3205331A/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
    • H01H33/70—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
    • H01H33/42—Driving mechanisms

Definitions

  • liquid for load switches used in tap changing has the advantage that the dimensions become smaller and the insulation path can be handled better.
  • the present invention provides an arrangement wherein the movable contact member of the switch is mechanically connected with and surrounded by a movable hollow cylinder to which a valve is applied, this valve communicating with a liquid tank, and wherein the movable contact is rigidly fixed on the cylinder.
  • FIG. 1 is a view in vertical central section of the improved switch showing the switch contacts in closed position
  • FIG. 2 is a view in half central section to the left of the center line of the switch showing the contacts in a position intermediate the closed and fully open position;
  • FIG. 3 is a view similar to FIG. 2 but showing a half section to the right of the center line and with the contacts depicted in full open position.
  • switch contact 4 is arranged to be actuated so as to effect opening and closing of the switch contacts, and this contact 4 is seen to be constructed in hollow form and shaped as a nozzle.
  • Switch contact 5 is also movable, this contact being guided for its movement by a stem portion 5a thereof which slides in a sleeve 7a and being loaded int-o a position engageable with the other contact member 4 by means of a helical loading spring 12 surrounding the sleeve 7a, one end of this spring bearing against the contact 5 and the other end being fixed in position by abut- Patented Sept. 7, 1965 ment with the upper end wall of casing 7.
  • the casing 7 also includes a cylindrical chamber wall 3 of insulating material which surrounds the contact members 4, 5.
  • the lower end of the chamber wall 3 is connected to an annular part 1 supported upon a base plate 9 and the annular part 1 surrounds a hollow cylindrical part 2 which is secured to the movable hollow contact member 4.
  • the annular .part 1 includes a semi-circular passageway 1a forming part of the passageway for oil flow to the contacts.
  • An outer cylindrical wall 15 surrounds the cylindrical chamber wall 3 and the cylindrical parts 2 and 15 are secured to a transversely extending shaft 13 which, in turn, is secured to :a driving rod 8 which serves to impart an up and down movement to the concentric double cylinder constituted by the inner and outer cylindrical parts 2 and 15 which is involved in closing and opening the switch contacts 4, 5.
  • valve ring 10 which together with a movable ring of insulating material 6 forms the valve for the quenching liquid.
  • valve ring 6 surrounds chamber wall 3 and can move between a stop shoulder 11a formed at the lower end of an insulating sleeve 11 which surrounds the casing 7 and an abutment 14 which is secured to the inside of the outer cylinder wall 15.
  • the cylinder space and quenching chamber are connected through the valve (6, 10) with an oil tank which has not been illustrated. This tank can, for example, be disposed directly on the transformer and surround the entire switch so that this lies entirely in oil.
  • the connecting rod 8 moves upwardly from the position indicated in FIG. 3 and contact member 4 engages the other contact member 5.
  • the liquid oil for quenching the are on the next opening operation of the switch contacts is sucked into the hollow cylinder from the outside through the valve (6, 10) simultaneously with rising of the outer cylinder 15.
  • the valve is open inasmuch as valve ring 10 goes upwardly and the mobile part 6 strikes the abutment 14.
  • Spring 12 pushes firmly against the contact member 5 so that a very good and rapid closure of the contacts is obtained.
  • the advantage of the arrangement is an improved utilization of the quenching liquid and with need for very little space. Moreover, a very simple valve construction is provided using readily available parts. Another advantage of the improved construction is that one obtains a rapid and most efiicient opening of the contacts which can be powerfully accelerated without difficulty and provide a rapid change in the transformer taps.
  • the combination comprising a first hollow contact member and a second contact member in axial alignment, spring means biasing said second contact member into, engagement with said first contact member when said contact members are engaged, a first hollow cylinder concentric with and secured to said first hollow contact member, a second hollow cylinder arranged concentrically with and surrounding said first hollow cylinder in radially spaced relation thereto to establish an annular oil chamber therebetween, a stationary annular member disposed between said first and second hollow cylinders and which establishes a wall for one end of said annular oil chamber, a stationary third hollow cylinder interposed concentrically in said.
  • annular oil chamber intermediate said first and second hollow cylinders for dividing said chamber into inner and outer annular passageways for oil flow, means establishing Communication between said inner and outer annular passageways adjacent said stationary annular member, a valve ring located in said outer annular passageway adjacent the opposite end of said oil chamber, said valve ring being movable between a valve-closed position in contact with an inturned flange on said second hollow cylinder to close said opposite end of said oil chamber and a valve-open position separted from said inturned flange and in contact with an abutment located on the inside of said second hollow cylinder, and a, drive member secured to said first and second hollow cylinders for actuating said cylinders and also said first contact member simultaneously, said valve ring being shiftable from an open position to a closed position automatically upon movement of said first and second hollow cylinders and first contact member in the direction to separate said contact members and thereby force oil to flow from said outer annular passageway into and through said inner annular passageway into the gap between said contact members as they separate

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Circuit Breakers (AREA)
US134941A 1960-09-01 1961-08-30 Pump means for an electrical switch with a liquid as an arc extinguishing medium Expired - Lifetime US3205331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH988260A CH384055A (de) 1960-09-01 1960-09-01 Schalter mit einer strömenden Flüssigkeit als Löschmittel

Publications (1)

Publication Number Publication Date
US3205331A true US3205331A (en) 1965-09-07

Family

ID=4356691

Family Applications (1)

Application Number Title Priority Date Filing Date
US134941A Expired - Lifetime US3205331A (en) 1960-09-01 1961-08-30 Pump means for an electrical switch with a liquid as an arc extinguishing medium

Country Status (4)

Country Link
US (1) US3205331A (enrdf_load_stackoverflow)
CH (1) CH384055A (enrdf_load_stackoverflow)
GB (1) GB925341A (enrdf_load_stackoverflow)
NL (2) NL268023A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378661A (en) * 1965-10-20 1968-04-16 Allis Chalmers Mfg Co Auxiliary contact structure with arc suppressing means
US3531609A (en) * 1966-04-15 1970-09-29 Jean Louis Gratzmuller Electrical circuit breaker
US4161636A (en) * 1975-06-18 1979-07-17 Bbc Brown, Boveri & Company Limited Arc extinguishing arrangement for gas blast type circuit breaker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671326C (de) * 1937-10-16 1939-02-04 Voigt & Haeffner Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671326C (de) * 1937-10-16 1939-02-04 Voigt & Haeffner Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378661A (en) * 1965-10-20 1968-04-16 Allis Chalmers Mfg Co Auxiliary contact structure with arc suppressing means
US3531609A (en) * 1966-04-15 1970-09-29 Jean Louis Gratzmuller Electrical circuit breaker
US4161636A (en) * 1975-06-18 1979-07-17 Bbc Brown, Boveri & Company Limited Arc extinguishing arrangement for gas blast type circuit breaker

Also Published As

Publication number Publication date
NL268023A (enrdf_load_stackoverflow)
GB925341A (en) 1963-05-08
CH384055A (de) 1964-11-15
NL121859C (enrdf_load_stackoverflow)

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