EP0735555B1 - Hochspannungs-Lastschalter - Google Patents

Hochspannungs-Lastschalter Download PDF

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Publication number
EP0735555B1
EP0735555B1 EP19960200752 EP96200752A EP0735555B1 EP 0735555 B1 EP0735555 B1 EP 0735555B1 EP 19960200752 EP19960200752 EP 19960200752 EP 96200752 A EP96200752 A EP 96200752A EP 0735555 B1 EP0735555 B1 EP 0735555B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
metal tube
flange
end portion
tube
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
EP19960200752
Other languages
English (en)
French (fr)
Other versions
EP0735555A2 (de
EP0735555A3 (de
Inventor
Peter Stengärd
Ulf Akersson
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.)
ABB AB
Original Assignee
ABB AB
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 ABB AB filed Critical ABB AB
Publication of EP0735555A2 publication Critical patent/EP0735555A2/de
Publication of EP0735555A3 publication Critical patent/EP0735555A3/de
Application granted granted Critical
Publication of EP0735555B1 publication Critical patent/EP0735555B1/de
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
    • H01H33/02—Details
    • H01H33/025—Terminal arrangements

Definitions

  • the present invention relates to a high-voltage circuit breaker of the kind described in the preamble to claim 1.
  • the circuit breaker comprises an elongated casing of insulating material which is filled with a gaseous arc-extinguishing medium and provided with connection flanges.
  • the casing comprises a contact device with cooperating fixed and movable main and arcing contacts.
  • the fixed contacts are arranged at one end portion of a first metal tube which is secured to one of the connection flanges of the circuit breaker, whereas the movable contacts are arranged at one end portion of a second metal tube, which is connected via an operating rod to an operating device and, by means thereof, is axially displaceable in the casing between a closed and an open position.
  • the second metal tube is permanently connected, via a sliding contact means, to a third metal tube secured to the other connection flange of the circuit breaker.
  • the metal tubes are made of plastically machinable sheet material.
  • the invention is primarily intended for circuit breakers with rated operating voltages of the order of magnitude of 100-300 kV, but it may also be used to advantage in circuit breakers for voltages both above and below this range, for example in medium-voltage circuit breakers.
  • Circuit breakers of the above-mentioned kind are previously known, for example from the ABB pamphlet SESWG/B 2330 E "SF 6 Circuit-Breaker Type LTB", published in 1990.
  • the circuit breaker shown in this publication has been described below with reference to the accompanying drawing figures 1 and 2.
  • the connection flanges have been fixed to the fixed metal tubes which are part of the current path of the circuit breaker in such a way that flanges are formed on the metal tubes and then screwed to the respective connection flange.
  • a large number of screws are required, which entails a great deal of work during mounting and machining.
  • the invention aims to provide a circuit breaker of the above-mentioned kind which is simpler to manufacture and hence less expensive, and which has a lower contact resistance between the main current path and the connection flanges than comparable prior art circuit breakers. This is achieved according to the invention with a design which exhibits the characteristic features described in the claims.
  • the fixed current-carrying metal tubes are connected to the connection flanges by rolling out one end portion of the tubes into a groove prepared in the respective connection flange.
  • the current transfer between the tube and the flange is ensured by means of a resilient contact member mounted in the bottom of the groove, for example in the form of a spiral spring of contact material.
  • the circuit breaker shown in Figures 1 and 2 is only one example of the type of circuit breaker, to which the present invention may advantageously be applied.
  • the circuit breaker has an elongated casing 10 of insulating material provided with an upper and a lower connection flange 11 and 12, respectively.
  • the contact device of the circuit breaker comprises a fixed main contact 13 which cooperates with an axially movable main contact 14, as well as a fixed plug-shaped arcing contact 15 which cooperates with an axially movable sleeve-shaped arcing contact 16.
  • the circuit breaker has a stationary upper current path section 17 in the form of a copper tube with a thickness of one or a few millimetres.
  • the lower end portion of the tube supports the fixed main contact 13 of the circuit breaker.
  • the fixed arcing contact 15 of the circuit breaker is arranged coaxially in the tube 17 and is electrically and mechanically connected thereto.
  • the movable main contact 14 of the circuit breaker consists of the upper end portion of a hollow cylinder 18 (puffer-type cylinder) in the form of a copper tube, which may have the same cross-section dimension as the copper tube 17.
  • the movable arcing contact 16 is arranged coaxially in the cylinder 18 and is electrically and mechanically connected thereto.
  • the hollow cylinder 18 supports an electrically insulating blast nozzle 19.
  • an insulating operating rod 20 Via an insulating operating rod 20, which extends inside a supporting insulator 21 to a mechanism housing 29, the hollow cylinder 18 is connected by means of the movable contacts 14, 16 to an operating device and can be displaced by means of this device between the closed position shown in Figure 1 and the open position shown in Figure 2.
  • the hollow cylinder 18 surrounds the upper portion of a lower current path section 22 which is secured to the lower connection flange and which consists of a copper tube with substantially the same cross-section dimension as the copper tube 17. Via sliding contact means, the hollow cylinder 18 is electrically connected to the lower current path section 22.
  • FIG 3 shows how the fixed current path sections (the metal tubes) 17 and 22 according to the present invention may be connected to connection flanges 11 and 12, respectively, which may, for example, be of aluminium.
  • connection flanges 11 and 12 exhibits a centrally placed circular hole 23 and 24, respectively, with a surrounding groove 25 and 26, respectively, arranged in the limiting surface of the hole.
  • One end portion of the metal tubes 17, 22 extends into the holes 23 and 24, respectively, and is fixed to the respective flange 11, 12 by rolling the plastically machinable material in the tubes into the respective groove 25, 26.
  • the current transfer between the tube and the flange is ensured with the aid of a resilient contact member 27, 28, arranged at the bottom of the respective groove 25, 26, for example in the form of a spiral spring of contact material.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (5)

  1. Hochspannungs-Überlastschalter, der ein längliches, mit einem Lichtbogen-löschenden Gasmedium gefülltes und mit Verbindungsflanschen (11, 12) bereitgestelltes Gehäuse (10) umfasst, wobei das Gehäuse eine Kontakteinrichtung mit kooperierenden fixierten und bewegbaren Haupt- und Lichtbogenkontakten (13-16) aufweist, wobei die fixierten Kontakte (13, 15) an einem Endbereich einer ersten, an einem Verbindungsflansch (11) des Überlastschalters befestigten Metallröhre (17) angeordnet sind, während die bewegbaren Kontakte (14, 16) an einem Endbereich einer zweiten Metallröhre (18) angeordnet sind, die über einen Stellstab (20) mit einer Betätigungseinrichtung verbunden ist und die unter Verwendung der Einrichtung im Gehäuse zwischen einer geschlossenen und geöffneten Position axial verschiebbar ist, wobei die zweite Metallröhre (18) über Schleifkontaktmittel mit einer dritten, an dem anderen Verbindungsflansch (12) des Überlastschalters befestigten Metallröhre (22) ununterbrochen verbunden ist, wobei die Metallröhren (17, 18, 22) aus einem hinsichtlich der Form bearbeitbaren Blechmaterial hergestellt sind, dadurch gekennzeichnet, dass mindestens einer der Verbindungsflansche (11, 12) ein kreisförmiges Loch (23, 24) mit einer in der Begrenzungsfläche des Loches vorgesehenen umlaufenden Nut (25, 26) aufweist und dass sich ein Endbereich der ersten (17) oder der dritten Metallröhre (22) in die Nut erstreckt und durch Pressen des hinsichtlich der Form bearbeitbaren Materials der Röhre in die Nut (25, 26) an dem Flansch befestigt wird.
  2. Überlastschalter nach Anspruch 1, dadurch gekennzeichnet, dass die Teile (27, 28) zur Stromübertragung zwischen der Metallröhre (17, 22) und dem Flansch (11, 12) in den Nuten (25, 26) angeordnet sind.
  3. Überlastschalter nach Anspruch 2, dadurch gekennzeichnet, dass die Stromübertragungsteile (27, 28) aus einer spiralförmigen Feder aus Kontaktwerkstoff bestehen.
  4. Überlastschalter nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Material der Metallröhren (17, 18, 22) Kupfer oder eine Kupferlegierung ist.
  5. Überlastschalter nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Metallröhren (17, 18, 22) aus einem Blech mit ein Dicke von höchstens 4 mm hergestellt sind.
EP19960200752 1995-03-30 1996-03-19 Hochspannungs-Lastschalter Expired - Lifetime EP0735555B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9501138 1995-03-30
SE9501138A SE505581C2 (sv) 1995-03-30 1995-03-30 Högspänningsbrytare

Publications (3)

Publication Number Publication Date
EP0735555A2 EP0735555A2 (de) 1996-10-02
EP0735555A3 EP0735555A3 (de) 1997-09-03
EP0735555B1 true EP0735555B1 (de) 2000-07-26

Family

ID=20397738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960200752 Expired - Lifetime EP0735555B1 (de) 1995-03-30 1996-03-19 Hochspannungs-Lastschalter

Country Status (3)

Country Link
EP (1) EP0735555B1 (de)
DE (1) DE69609439T2 (de)
SE (1) SE505581C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619177B2 (en) 2005-02-01 2009-11-17 Abb Technology Ag Nozzle fastening for electrical switching apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087038A (en) * 1959-10-19 1963-04-23 Raymond W Bethke Electric current interchange contact
DE2741368B2 (de) * 1977-09-14 1979-10-31 Siemens Ag, 1000 Berlin Und 8000 Muenchen Wellenlager für ein durch Drehung einer Welle betätigbares Mittelspannungsschaltgerät
CH622377A5 (de) * 1977-12-12 1981-03-31 Sprecher & Schuh Ag
US4241248A (en) * 1978-10-16 1980-12-23 S & C Electric Company Circuit interrupting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619177B2 (en) 2005-02-01 2009-11-17 Abb Technology Ag Nozzle fastening for electrical switching apparatus

Also Published As

Publication number Publication date
EP0735555A2 (de) 1996-10-02
SE9501138D0 (sv) 1995-03-30
EP0735555A3 (de) 1997-09-03
DE69609439D1 (de) 2000-08-31
SE505581C2 (sv) 1997-09-15
DE69609439T2 (de) 2001-03-08
SE9501138L (sv) 1996-10-01

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