EP0780867A2 - Vakuum Schaltvorrichtung - Google Patents

Vakuum Schaltvorrichtung Download PDF

Info

Publication number
EP0780867A2
EP0780867A2 EP96308888A EP96308888A EP0780867A2 EP 0780867 A2 EP0780867 A2 EP 0780867A2 EP 96308888 A EP96308888 A EP 96308888A EP 96308888 A EP96308888 A EP 96308888A EP 0780867 A2 EP0780867 A2 EP 0780867A2
Authority
EP
European Patent Office
Prior art keywords
housing
stub
switching
vacuum
switching device
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.)
Withdrawn
Application number
EP96308888A
Other languages
English (en)
French (fr)
Other versions
EP0780867A3 (de
Inventor
John Rand
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.)
GE Power UK
Original Assignee
GEC Alsthom 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 GEC Alsthom Ltd filed Critical GEC Alsthom Ltd
Publication of EP0780867A2 publication Critical patent/EP0780867A2/de
Publication of EP0780867A3 publication Critical patent/EP0780867A3/de
Withdrawn legal-status Critical Current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
    • H01H33/60—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings

Definitions

  • the invention concerns a vacuum switching device, and in particular, but not exclusively, a vacuum interrupter.
  • Vacuum interrupters are commonly used in electrical equipment for interrupting an AC supply in the event of a fault, e.g. a short-circuit on a power line.
  • a typical vacuum interrupter is shown in very general terms in Figure 1.
  • the interrupter comprises an insulator 10, normally made of a ceramic material, housing two electrically conductive contacts 11, 12. Contacts 11, 12 are taken out of the interrupter unit by means of respective stems 13, 14, the stems terminating in end-portions 15, 16, normally referred to as "end-stubs", for connection to further electrical equipment (not shown).
  • the end-stubs 15, 16 may have external or internal threads for effecting the connections.
  • the bellows unit 17 allows axial movement of the stem 14 to make and break, selectively, electrical contact between the contacts 11 and 12, contact 11 and stem 13 being fixed relative to the insulator 10.
  • the shield 18 is an electrically conductive component which serves two main purposes: to prevent an arc, which is drawn when the contacts are separated, from striking the insulator and to impede the deposition of metal vapour, which is given off from the contacts when the arc is present, on the insulator.
  • a vacuum switching device having a junction at which a housing of said switching device, a first switching component and a second switching component meet, said junction having a vacuum on one side and a gas on the other, said housing and said first and second switching components comprising locating means for allowing accurate location of said first and second switching components with respect to each other and with respect to said housing.
  • Said first switching component may comprise a male locating means and said second switching component may comprise a female locating means.
  • a hole may be provided in said housing for insertion of said male locating means through said housing, said hole having dimensions such as to allow, at room temperature, a clearance fit between the hole and said male locating means.
  • Said first switching component may be a contact member and said second switching component may be an end-stub for the electrical connection of said contact member to external equipment.
  • a method of brazing together components of a vacuum switching device comprising an insulating housing arrangement, first and second end-rings disposed at respective ends of said housing arrangement, a first contact member in locating engagement with a first end-stub and with said first end-ring, and a second contact member in locating engagement with a second end-stub and with a bellows assembly, a brazing agent being provided at interfaces of said components to be brazed together, the method comprising:
  • a vacuum interrupter comprising a pair of contacts 11, 12 on stems 13, 14 with associated end-stubs 15, 16.
  • the contact/stem arrangement is housed in a ceramic housing 10, the stem 13 and end-stub 15 being anchored to the ceramic housing 10 by means of an end-ring 23, while the stem 14 and end-stub 16 are anchored to the same housing 10 by way of a bellows unit 60 (only partly shown) and an end-ring 24.
  • the stem 13 has been narrowed to form a male locating means 41 in the form of a "peg", while the end-stub 15 has been bored at its upper end to produce a female locating means 42 which receives the peg 41.
  • the underside 30 of the end-ring 23 is provided with a hole which accomodates the peg 41 and allows accurate alignment of stem 13 and end-stub 15 along the centre-line of the interrupter.
  • the stem 14 is equipped with a narrowed-down portion 43 forming a second peg, while the end-stub 16 is bored at 44 to accomodate the peg 43.
  • the two stems 13, 14 have been shown as having the locating pegs, it is also possible for the male and female locating parts to be reversed, so that the end-stubs have the pegs, while the stems are bored to receive them.
  • the originally described arrangement of male and female parts is the preferred arrangement.
  • the interrupter is assembled with the aid of a jig 50, which comprises a base 51, three location rods 52 fixed to the base 51 at equidistant points around its circumference and three location discs 53.
  • the lower two discs 53 are maintained at a desired spacing relative to each other by way of spacers 54 (only one of which is shown).
  • Assembly is commenced by the insertion of the end-stub 15 of the interrupter into the base 51.
  • the fixed end-ring 23 i.e. the end-ring associated with the fixed contact 11
  • the fixed conductor arrangement consisting of the contact 11 and the stem 13 is located in the end-stub 15 with the aid of the peg 41.
  • the ceramic housing 10 is positioned on top of the end-ring 23, being guided by the lower two location discs 53, and a shield arrangement (not shown) is fitted.
  • the moving conductor arrangement consisting of the contact 12 and the stem 14 is then placed on top of the contact 11 and the bellows arrangement fitted, a plate 22 of the bellows arrangement going first, then the end-stub 16 which is located on the peg 43 of the stem 14, then the bellows unit 60 proper, which is held in position by the upper locating ring 53.
  • the last component to be fitted is the end-ring 24.
  • brazing ring is supplied in series with the components concerned.
  • a large weight 55 is placed on top of the end-ring 24 to squeeze the outer joints (e.g. the joint 61 between the ceramic housing 10 and the end-ring 23) and a smaller weight 56 is placed on the end-stub 16 to squeeze the inner joints, including the joint at the junction 45 of the end-stub 16 with the stem 14 and the plate 22 and that at the junction 40 of the end-stub 15 with the stem 13 and the end-ring 23.
  • the whole jigged assembly is then placed into an oven, which is evacuated down to 10 -6 mbar and heated to a temperature of up to 800°C, so that the brazing agent melts. The temperature is then allowed to fall, the brazing material then setting and securing all the component parts of the interrupter in one operation.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP96308888A 1995-12-21 1996-12-06 Vakuum Schaltvorrichtung Withdrawn EP0780867A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9526231 1995-12-21
GB9526231A GB2308497A (en) 1995-12-21 1995-12-21 Vacuum switching device

Publications (2)

Publication Number Publication Date
EP0780867A2 true EP0780867A2 (de) 1997-06-25
EP0780867A3 EP0780867A3 (de) 1998-10-21

Family

ID=10785860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96308888A Withdrawn EP0780867A3 (de) 1995-12-21 1996-12-06 Vakuum Schaltvorrichtung

Country Status (2)

Country Link
EP (1) EP0780867A3 (de)
GB (1) GB2308497A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109585198A (zh) * 2017-09-28 2019-04-05 平高集团有限公司 一种断路器空间位置对正方法及其对正工装

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026054A (en) * 1962-05-04 1966-04-14 Ass Elect Ind Improvements relating to vacuum electric devices
GB1001425A (en) * 1963-05-15 1965-08-18 Ass Elect Ind Improvements relating to vacuum switches
GB1107653A (en) * 1965-04-16 1968-03-27 Gen Electric Improvements in electric arc control
JPS5812230A (ja) * 1981-07-16 1983-01-24 富士電機株式会社 断路器付真空負荷開閉器
DE3216251A1 (de) * 1982-04-30 1983-11-03 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre
US4871888A (en) * 1988-02-16 1989-10-03 Bestel Ernest F Tubular supported axial magnetic field interrupter
US5004877A (en) * 1988-10-03 1991-04-02 Square D Company Vacuum interrupter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109585198A (zh) * 2017-09-28 2019-04-05 平高集团有限公司 一种断路器空间位置对正方法及其对正工装
CN109585198B (zh) * 2017-09-28 2020-05-08 平高集团有限公司 一种断路器空间位置对正方法及其对正工装

Also Published As

Publication number Publication date
EP0780867A3 (de) 1998-10-21
GB2308497A (en) 1997-06-25
GB9526231D0 (en) 1996-02-21

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