US3470341A - Vacuum switch with liquid filled bellows operation - Google Patents

Vacuum switch with liquid filled bellows operation Download PDF

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Publication number
US3470341A
US3470341A US583171A US3470341DA US3470341A US 3470341 A US3470341 A US 3470341A US 583171 A US583171 A US 583171A US 3470341D A US3470341D A US 3470341DA US 3470341 A US3470341 A US 3470341A
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US
United States
Prior art keywords
contacts
bellows
vacuum switch
movable
contact
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
US583171A
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English (en)
Inventor
Stanley Beddoe
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.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
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 English Electric Co Ltd filed Critical English Electric Co Ltd
Application granted granted Critical
Publication of US3470341A publication Critical patent/US3470341A/en
Anticipated expiration legal-status Critical
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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • 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
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66238—Specific bellows details

Definitions

  • a vacuum switch having a pair of contacts in an evacuated casing; a bellows interconnects one of the contacts and the casing, and forms part of the wall of the evacuated casing, and of a closed chamber outside the evacuated casing. Insulating'liquid is supplied to .the closed chamber, both to move the contact between open" and closed positions, and to damp oscillations in the bellows and contact system, thus preventing contact bounce.
  • the liquid may be transformer oil.
  • This invention relates to electric switchgear.
  • a vacuum switch has a movable contact sealed to the casing by bellows or the like, and the movable contact is moved between the open and closed positions by means of a fluid pressure applied to the bellows or the like.
  • FIG. 1 is a section through a first embodiment of vacuum switch in accordance with the invention
  • FIG. 2 is a view similar to FIG. 1 of a second embodiment
  • FIG. 3 shows an arrangement including a number of vacuum switches of the first embodiment arranged in series, and,
  • FIG. 4 shows an arrangement including a number of vacuum switches of the second embodiment arranged in series.
  • the vacuum switch includes a casing, including a cylindrical insulator 11 bonded to end members 12, 13 one at each end, the end members being sealed in turn to end plates 14, 15. It will be understood that the interior of the casing operates at a high vacuum.
  • One end plate 14 has a fixed electrode means or contact 16 secured to it, and is provided with a terminal 17 for connection in an external circuit.
  • the movable contact 18 is in the centre of the other end plate 15, and is connected to it by a flexible metal bellows 19 extending between the end plate and a flange 27 on the contact stem.
  • the liquid which may for example be transformer oil, serves two purposes; first, increase of the pressure of the liquid causes closing of the contacts, and decrease of the pressure allows them to open; and secondly the liquid provides damping of oscillations which have been found to occur in the bellows and which limit their useful life.
  • Opening of the contacts, on decrease of the liquid pressure, is ensured by a tension spring 23 between the interior of the hollow movable contact 18 and the end housing 20.
  • a sliding connection is provided between the movable contact 18 and the end housing by resilient 3,470,341 Patented Sept. 30, 1969 fingers 24, which serve both as a guide for movement of the contact and to convey the current to the terminal 25 on the end'housing.
  • the usual shields '26 are provided to protect the insulator11 from'metal deposition due to arcing between the contacts 16,18.
  • an increase of pressure is produced in closed chamber 21, by suitable means (not shown), for example by a valve controlling a supply of the liquid under pressure to pipe 22. This increase causes the bellows 19- to extend, so that the movable contact 18 is brought into engagement with fixed contact 16.
  • FIG. 2 there is shown a vacuum switch which'in many respects is similar to that of FIG.
  • the two endplates 15A" of a pair of identical vacuum switch units for engagement or mutual cooperative relationship are connected together by a cylindrical electrical conductor 28 and the two movable contacts 18A are electrically connected back-to-back.
  • the movable contacts 18A are connected to the endplates by respective bellows 19A, and the bellows together with endplates 15A and conductor 28 define a closed chamber 21A. This is supplied with liquid, in a similar manner to that described with reference to FIG. 1, through a pipe 22A of insulat ing material and the opening force is provided by a tension spring 23A connected between the hollow movable contacts 18A.
  • the movable contacts are connected by a bridging finger-type connection 24A, located symmetrically by inter-connection with the conductor 28.
  • a pair of tension springs may be provided between a central member, carried for example by the condoctor 28, and the respective movable contacts 18A.
  • the operation is similar to that of the switch of FIG. 1, that is, on application of pressure to chamber 21A through pipe 22A the movable contacts 18A make contact with the fixed contacts 16, and on decrease of the pressure the spring 23A causes both pairs of contacts to break.
  • the contacts 16, 18, 18A may be of any known or convenient form, and in particular the contacts 16 need not be rigidly fixed, and are preferably resiliently mounted, although referred to as the fixed contacts, as is well in the art.
  • FIG. 3 a number of vacuum switches as described with reference to FIG. 1 are shown connected in series, the terminal 17 of one being connected, as shown, to the terminal 25 of the next.
  • the pipes 22 of each switch are connected to a common supply line 29 for simultaneous operation of the switches.
  • FIG. 4 two vacuum switches as described with reference to FIG. 2, each switch having two units, are shown connected in series, one terminal 17 of each switch being connected by a conductor 30 to the other switch, and the other terminals forming the terminals for connection in an external circuit.
  • the pipes 22A are connected to a common supply line 31.
  • bellows 19, 19A shown there may be provided suitable equivalent constructions, for example built-up constructions incorporating flexible metal bellows or diaphragms.
  • a vacuum switch having two breaks in series, comprising a first evacuated casing; a second evacuated casing; a first pair of contacts relatively movable into and out of engagement, within said first evacuated casing, said first pair of contacts including a first movable contact which is movable relative to said first evacuated casing; first bellows means connecting said first movable contact and. saidfirstevacuated casing; asecond pair -oi 3.
  • a vacuum'switch as claimedin-ciaiml comprising contacts relatively movable into and out of engagement within said second evacuated casing, said second pair of contacts including a;-second movable -contactwhich is movable relative-to said second evacuated casing; second bellows means connecting said second movablescoiitact andsaid second evacuated casing; means'electrically interconnecting said first mov'ab le contact and said second .A movable contact; means including said firstbellows means and said second bellows means' and defining a closed chamber; and means to supply.
  • a vacuum switch as claimed in claim-.1, v said evacuated casings comprising an end plate having a central aperture; said billows means beingsealedto said end plate around sai central aperture and ,to. said contacts; said contacts comprising a stem; afixed electrically-conducting member in which said stem is slidableg'. and terminal means electrically connected to. said fixed electricallyconducting member. 4 i
  • end housing means secured to said end plate and to said fixed electrically-conducting member; said end plate, said bellows means, and said end housing means each defining tpar t of sthe -b oundj ofsaid closed chamber.

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  • Push-Button Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
US583171A 1965-09-30 1966-09-30 Vacuum switch with liquid filled bellows operation Expired - Lifetime US3470341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41637/65A GB1162372A (en) 1965-09-30 1965-09-30 Improvements in or relating to Vacuum switches

Publications (1)

Publication Number Publication Date
US3470341A true US3470341A (en) 1969-09-30

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Application Number Title Priority Date Filing Date
US583171A Expired - Lifetime US3470341A (en) 1965-09-30 1966-09-30 Vacuum switch with liquid filled bellows operation

Country Status (4)

Country Link
US (1) US3470341A (fr)
CH (1) CH448220A (fr)
DE (1) DE1590360A1 (fr)
GB (1) GB1162372A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612795A (en) * 1969-01-09 1971-10-12 Westinghouse Electric Corp Shielding arrangements for vacuum-type circuit interrupters of the two-contact type
US3753256A (en) * 1971-08-31 1973-08-14 Raymond Lee Organization Inc Fire alarm system
US3970810A (en) * 1975-03-06 1976-07-20 General Electric Company Electric circuit breaker comprising parallel-connected vacuum interrupters
US4107496A (en) * 1973-12-21 1978-08-15 Hazemeijer B.V. Vacuum switching apparatus with double interruption and including an interposed barrier
US20080093344A1 (en) * 2005-07-29 2008-04-24 Siemens Transmission & Distribution Sa Electrical Switchgear

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS476368U (fr) * 1971-02-15 1972-09-21
DE3923660A1 (de) * 1989-07-18 1991-01-24 Leybold Ag Ein/aus-schalter
GB2471864A (en) * 2009-07-15 2011-01-19 Lucy And Co Ltd W Vacuum circuit breaker surrounded by fluid
DE102014219772A1 (de) * 2014-09-30 2016-03-31 Siemens Aktiengesellschaft Vakuumschaltröhre
EP3297013B1 (fr) * 2016-09-20 2020-04-22 Rail Power Systems GmbH Appareil de commutation haute tension et installation de commutation comprenant un appareil de commutation haute tension et procede de production d'un appareil de commutation haute tension
FR3107986B1 (fr) * 2020-03-03 2022-06-03 Alstom Transp Tech Système d’interruption d’un courant électrique et véhicule ferroviaire comprenant un tel système d’interruption
CN111696822B (zh) * 2020-06-24 2022-06-14 广东电网有限责任公司电力科学研究院 一种真空灭弧室及柱上开关

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1908088A (en) * 1929-01-24 1933-05-09 Henry G Dickerson Pressure switch
DE607604C (de) * 1930-12-25 1935-01-03 Sigwart Ruppel Dipl Ing Vakuumschalter
US2326074A (en) * 1939-09-20 1943-08-03 Westinghouse Electric & Mfg Co Circuit interrupter
US3129308A (en) * 1961-04-22 1964-04-14 Nippon Electric Co Vacuum circuit breaker having buffering means in relatively stationary electrode structure
US3261954A (en) * 1965-01-11 1966-07-19 Joslyn Mfg & Supply Co Current interruption and separation electrode structure for vacuum switching apparatu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1908088A (en) * 1929-01-24 1933-05-09 Henry G Dickerson Pressure switch
DE607604C (de) * 1930-12-25 1935-01-03 Sigwart Ruppel Dipl Ing Vakuumschalter
US2326074A (en) * 1939-09-20 1943-08-03 Westinghouse Electric & Mfg Co Circuit interrupter
US3129308A (en) * 1961-04-22 1964-04-14 Nippon Electric Co Vacuum circuit breaker having buffering means in relatively stationary electrode structure
US3261954A (en) * 1965-01-11 1966-07-19 Joslyn Mfg & Supply Co Current interruption and separation electrode structure for vacuum switching apparatu

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612795A (en) * 1969-01-09 1971-10-12 Westinghouse Electric Corp Shielding arrangements for vacuum-type circuit interrupters of the two-contact type
US3753256A (en) * 1971-08-31 1973-08-14 Raymond Lee Organization Inc Fire alarm system
US4107496A (en) * 1973-12-21 1978-08-15 Hazemeijer B.V. Vacuum switching apparatus with double interruption and including an interposed barrier
US3970810A (en) * 1975-03-06 1976-07-20 General Electric Company Electric circuit breaker comprising parallel-connected vacuum interrupters
US20080093344A1 (en) * 2005-07-29 2008-04-24 Siemens Transmission & Distribution Sa Electrical Switchgear
US7589295B2 (en) * 2005-07-29 2009-09-15 Siemens Aktiengesellschaft Electrical switchgear

Also Published As

Publication number Publication date
GB1162372A (en) 1969-08-27
CH448220A (fr) 1967-12-15
DE1590360A1 (de) 1970-04-16

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