EP0806049B1 - Hochspannungslastschalter - Google Patents

Hochspannungslastschalter Download PDF

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Publication number
EP0806049B1
EP0806049B1 EP95942364A EP95942364A EP0806049B1 EP 0806049 B1 EP0806049 B1 EP 0806049B1 EP 95942364 A EP95942364 A EP 95942364A EP 95942364 A EP95942364 A EP 95942364A EP 0806049 B1 EP0806049 B1 EP 0806049B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
metal tube
tube
breaker according
end portion
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
EP95942364A
Other languages
English (en)
French (fr)
Other versions
EP0806049A1 (de
Inventor
Kerstin Skogh
Peter Stengard
Ulf Akesson
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
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Filing date
Publication date
Application filed by ABB AB filed Critical ABB AB
Publication of EP0806049A1 publication Critical patent/EP0806049A1/de
Application granted granted Critical
Publication of EP0806049B1 publication Critical patent/EP0806049B1/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
    • H01H33/70—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
    • H01H33/91—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 air or gas
    • 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 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 blast piston and an annular guide means for the operating rod are fixed to the lower connection flange of the circuit breaker via rods arranged parallel to the operating rod.
  • the other components included in the circuit breaker such as the movable arcing contact, the intermediate flange between the compression space (the puffer volume) and the pressure-collecting space (the self-blasting volume) etc., are fixed to the respective current path section (metal tube) by means of screw joints.
  • the invention aims to provide a circuit breaker of the above-mentioned kind which is simpler to manufacture, contains a smaller number of components, and has a lower contact resistance between the current path sections of the circuit breaker 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 circuit breaker shown in Figure 1 has an elongated casing 10 which is made of insulating material and which is provided with an upper and a lower connection flange 11 and 12, respectively.
  • the casing contains insulating gas, for example SF 6 .
  • 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 is compression-moulded and slotted so as to form a large number of contact fingers which are integrated with the tube and which constitute 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 by means of a holder 18.
  • the movable main contact 14 of the circuit breaker consists of the upper end portion of a hollow cylinder 19 (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 19 and is electrically and mechanically connected thereto.
  • the hollow cylinder 19 encloses a pressure-collecting space 20 (the self-blasting volume), the volume of which is constant, and a compression space 21 (the puffer volume).
  • the spaces 20 and 21 are separated by an intermediate flange 22 with openings which are covered by an annular plate serving as a nonreturn valve.
  • the hollow cylinder 19 supports an electrically insulating blast nozzle 23 with an annular channel 24, which connects the pressure-collecting space 20 to the area where the arc is burning during an opening operation.
  • the hollow cylinder 19 with the movable contacts 14, 16 is connected, via an operating rod 25, to an operating device and can be displaced by means of this device between a closed position and the open position shown in Figure 1.
  • the hollow cylinder 19 surrounds the upper portion of a lower current path section 26 which is secured to the lower connection flange 12 and which consists of a copper tube with substantially the same cross-section dimension as the copper tube 17. Via sliding contact means 27, for example in the form of spiral springs of contact material, the hollow cylinder 19 is electrically connected to the lower current path section 26.
  • the compression space 21 is limited downwards by an annular blast piston 28 which surrounds the operating rod 25.
  • This piston is fixed by being pressed to the upper end portion of the copper tube 26.
  • an annular guide washer for the operating rod 25 is pressed to the tube 26.
  • the circuit breaker according to Figure 1 operates as follows:
  • the operating rod 25 is pulled downwards with the aid of the operating device, whereby the main contacts 13 and 14 are first separated.
  • the current thereby commutates over to the arcing contacts 15, 16 which, when separated, generate an arc between them.
  • the arc heats the gas in the arcing region, whereby the gas pressure increases and a gas flow through the channel 24 into the pressure-collecting space 20 is started.
  • the arc current follows the power-frequency sine curve, and when the current value approaches the zero crossing, the pressure in the arc region starts decreasing.
  • the pressure increase in the pressure-collecting space 20, generated by the arc is insufficient to achieve an efficient flow of arc-extinguishing gas.
  • the arc extinction is performed with the aid of the compression space 21, in which a pressure build-up takes place during the opening process because of the downward movement of the intermediate flange 22.
  • the pressure in the compression space 21 then becomes higher than in the pressure-collecting space 20, which causes the nonreturn valve in the intermediate flange to open and cold arc-extinguishing gas to flow from the compression space 21 via the pressure-collecting space 20 and the channel 24 to the blast nozzle 23, where the arc is cooled and extinguished.
  • Figure 2 shows separately the lower current path section 26 with a piston 28 and a guide washer 29 pressed to the section 26.
  • the pressing has been accomplished by pressing the plastically machinable material in the tube 26, for example by so-called pressure turning, into prepared grooves 31 and 32, respectively, in the piston 28 and the guide washer 29.
  • the piston 28 is also provided with grooves 33 into which tube material is pressed for forming a seat for the sliding contact means 27.
  • Figures 3 and 4 show examples of puffer-type circuit breakers where the blast piston 28 is directly integrated into the tubular lower current path 26.
  • the blast piston is here formed by inwardly arching the upper end portion of the tube 26 so as to create an annular bottom with a U-shaped profile, which may be semicircular according to Figure 3 or substantially perpendicular according to Figure 4.
  • the arched curvature imparts enormous mechanical strength to the end portion of the tube. This is particularly true of the embodiment according to Figure 3, which may be used at high pressures in the compression chamber 21.
  • the embodiment according to Figure 4 has lower strength and is therefore intended for circuit breakers dimensioned for medium-high pressures in the chamber 21.
  • the blast piston 28 is provided with openings 34 covered by an annular washer 35 which serves as a nonreturn valve and has a profile adapted to the shape of the blast piston 28.
  • an annular washer 35 which serves as a nonreturn valve and has a profile adapted to the shape of the blast piston 28.
  • the end portion of the tube is also shaped with grooves for seals 36 and 37 against the hollow cylinder 19 and the operating rod 25, respectively.
  • the embodiment of the blast piston shown in Figures 3 and 4 is not limited to use only in connection with puffer-type circuit breakers, but may be used for all types of SF 6 circuit breakers.

Landscapes

  • Circuit Breakers (AREA)
  • Fuses (AREA)

Claims (9)

  1. Hochspannungslastschalter mit länglichem Gehäuse (10), das mit einem gasförmigen bogenlöschenden Medium gefüllt und mit Anschlußflanschen (11, 12) versehen ist, wobei das Gehäuse eine Kontaktvorrichtung mit zusammenwirkenden, stillstehenden und beweglichen Haupt- und Bogenkontakten (13-16) umfaßt, wobei die stillstehenden Kontakte (13, 15) am einen Giebelbereich eines ersten, am einen Anschlußflansch (11) des Lastschalters befestigten Metallrohres (17) angeordnet sind, wogegen die beweglichen Kontakte (14, 16) an einem Giebelbereich eines zweiten Metallrohres angeordnet sind, das über eine Bedienungsstange (25) an die Bedienungsvorrichtung angeschlossen ist und mit Hilfe dieser Vorrichtung achsial im Gehäuse zwischen einer Anschluß- und einer Abschaltstellung verschiebbar ist, wobei das zweite Metallrohr (19) über eine Gleitkontaktvorrichtung (27) ständig an ein drittes, am anderen Anschlußflansch des Lastschalters befestigten Metallrohr (26) angeschlossen ist und wo das zweite Metallrohr (19) zusammen mit einem Löschkammerkolben (28) einen Druckraum (21) begrenzt, dadurch gekennzeichnet, daß die Metallrohre (17, 19, 26) aus plastisch verformbaren Plattenwerkstoff hergestellt sind und daß der Löschkammerkolben (28) in das dritte Metallrohr (26) durch plastische Bearbeitung desselben eingefügt ist.
  2. Lastschalter gemäß Patentanspruch 1, dadurch gekennzeichnet, daß der Löschkammerkolben (28) aus einem im wesentlichen rotationssymmetrischen Körper besteht, der mit mindestens einer Nut (31) versehen ist, die den Umkreis des Körpers umgibt und an einem Giebelbereich dieses dritten Metallrohres (26) dadurch befestigt ist, daß plastisch verformbares Material des Rohres in die Nut gepresst wird.
  3. Lastschalter gemäß Patentanspruch 1, dadurch gekennzeichnet, daß der Löschkammerkolben (28) aus einem inneren Anflanschen des einen Giebelbereiches dieses dritten Metallrohres (26) mit Hilfe plastischer Verformung besteht.
  4. Lastschalter gemäß Patentanspruch 1, 2 oder 3, dadurch gekennzeichnet, daß eine rohrförmige Führungsscheibe (29) zum Führen der Bedienungsstange (25) an diesem dritten Metallrohr (26) befestigt ist, indem plastisch verformbarer Werkstoff des Rohres in eine bereitgestellte, umgebende Nut (32) in der Scheibe (29) gepresst wird.
  5. Lastschalter gemäß irgendeinem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß der bewegliche Bogenkontakt (16) des Lastschalters von einem ringförmigen Körper getragen wird, der zusammen mit einer Löschkammerdüse (23) am einen Giebelbereich dieses zweiten Metallrohres (19) befestigt ist, indem ein Teil der Rohrwand in eine bereitgestellte, umgebende Nut im Körper gepresst wird.
  6. Lastschalter gemäß irgendeinem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß in diesem zweiten Metallrohr (19) ein ringförmiger Zwischenflansch (22) zwischen einem druckaufnehmenden Raum (20) und diesem Druckraum (21) angeordnet ist, wobei der Zwischenflansch am Rohr (19) befestigt ist, indem ein Bereich der Rohrwand in eine bereitgestellte Nut im Flansch gepresst wird.
  7. Lastschalter gemäß irgendeinem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß das Material dieser Metallrohre (17, 19, 26) Kupfer oder eine Kupferlegierung ist.
  8. Lastschalter gemäß irgendeinem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß die Metallrohre (17, 19, 26) aus einer Platte einer Dicke von höchstens 4 mm hergestellt sind.
  9. Herstellungsverfahren für einen Lastschalter gemäß irgendeinem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß die Hauptstrombahn des Lastschalters aus einer Anzahl plastisch verformbarer, kreisrund-zylindrischer Metallrohre (17, 19, 26), vorzugsweise aus Kupfer oder einer Kupferlegierung, hergestellt ist und daß der Löschkammerkolben (28) und jedwede weitere Bestandteile des Lastschalters in das entsporechende Metallrohr durch dessen plastische Verformung, beispielsweise mit Hilfe von Drücken eingefügt sind.
EP95942364A 1994-12-29 1995-12-22 Hochspannungslastschalter Expired - Lifetime EP0806049B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9404549A SE514917C2 (sv) 1994-12-29 1994-12-29 Högspänningsbrytare samt förfarande för tillverkning av en sådan brytare
SE9404549 1994-12-29
PCT/SE1995/001574 WO1996021234A1 (en) 1994-12-29 1995-12-22 High-voltage circuit breaker

Publications (2)

Publication Number Publication Date
EP0806049A1 EP0806049A1 (de) 1997-11-12
EP0806049B1 true EP0806049B1 (de) 2000-03-15

Family

ID=20396505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95942364A Expired - Lifetime EP0806049B1 (de) 1994-12-29 1995-12-22 Hochspannungslastschalter

Country Status (5)

Country Link
EP (1) EP0806049B1 (de)
DE (1) DE69515701T2 (de)
ES (1) ES2146793T3 (de)
SE (1) SE514917C2 (de)
WO (1) WO1996021234A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686602A1 (de) * 2005-02-01 2006-08-02 ABB Technology AG Düsenbefestigung für elektrisches Schaltgerät
EP1814132A1 (de) 2006-01-31 2007-08-01 ABB Technology AG Schaltkammer für einen gasisolierten Hochspannungsschalter
CN102856114A (zh) * 2011-06-29 2013-01-02 Abb技术有限公司 用于高额定电流的双电流路径

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2821482B1 (fr) * 2001-02-27 2003-04-04 Alstom Disjoncteur incluant un canal de vidange de la chambre de compression par piston
DE102009009452A1 (de) * 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Schaltgeräteanordnung mit einer Schaltstrecke
CN104143466B (zh) * 2013-09-24 2017-06-30 国家电网公司 一种接地开关装配单元及其高速接地开关

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808676A (en) * 1973-02-16 1974-05-07 Black & Decker Mfg Co Process of manufacturing an armature-piston sub-assembly
CH622377A5 (de) * 1977-12-12 1981-03-31 Sprecher & Schuh Ag
SE452924B (sv) * 1986-04-22 1987-12-21 Asea Ab Elektrisk brytare med gasformigt sleckmedel
DE3763329D1 (de) * 1986-09-02 1990-07-26 Gen Motors Corp Verfahren zur herstellung eines einheitsmoduls mit kolben und kolbenstange.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686602A1 (de) * 2005-02-01 2006-08-02 ABB Technology AG Düsenbefestigung für elektrisches Schaltgerät
WO2006081697A1 (de) * 2005-02-01 2006-08-10 Abb Technology Ag Düsenbefestigung für elektrisches schaltgerät
US7619177B2 (en) 2005-02-01 2009-11-17 Abb Technology Ag Nozzle fastening for electrical switching apparatus
EP1814132A1 (de) 2006-01-31 2007-08-01 ABB Technology AG Schaltkammer für einen gasisolierten Hochspannungsschalter
WO2007087733A1 (de) * 2006-01-31 2007-08-09 Abb Technology Ag Schaltkammer für einen gasisolierten hochspannungsschalter
US7902478B2 (en) 2006-01-31 2011-03-08 Abb Technology Ag Switching chamber for a gas-insulated high-voltage switch
CN101385109B (zh) * 2006-01-31 2011-09-28 Abb技术有限公司 气体绝缘高压开关的灭弧室
CN102856114A (zh) * 2011-06-29 2013-01-02 Abb技术有限公司 用于高额定电流的双电流路径
CN102856114B (zh) * 2011-06-29 2016-10-05 Abb技术有限公司 用于高额定电流的双电流路径

Also Published As

Publication number Publication date
SE9404549D0 (sv) 1994-12-29
DE69515701T2 (de) 2000-11-02
DE69515701D1 (de) 2000-04-20
EP0806049A1 (de) 1997-11-12
WO1996021234A1 (en) 1996-07-11
ES2146793T3 (es) 2000-08-16
SE514917C2 (sv) 2001-05-14
SE9404549L (sv) 1996-06-30

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