EP2510530B1 - Hochspannungsschutzschalter mit entfernbarer abschirmung zur verbesserung des feldgradienten - Google Patents

Hochspannungsschutzschalter mit entfernbarer abschirmung zur verbesserung des feldgradienten Download PDF

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Publication number
EP2510530B1
EP2510530B1 EP10787765.6A EP10787765A EP2510530B1 EP 2510530 B1 EP2510530 B1 EP 2510530B1 EP 10787765 A EP10787765 A EP 10787765A EP 2510530 B1 EP2510530 B1 EP 2510530B1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit breaker
contact support
shield
contacts
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.)
Not-in-force
Application number
EP10787765.6A
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English (en)
French (fr)
Other versions
EP2510530A1 (de
Inventor
Dan Lucius Penache
Michel Perret
David Berard
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2510530A1 publication Critical patent/EP2510530A1/de
Application granted granted Critical
Publication of EP2510530B1 publication Critical patent/EP2510530B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H01H33/245—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring using movable field electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle

Definitions

  • the invention relates to electrical switchgear which must improve the performance vis-à-vis the electric field that appears during switching. It relates in particular to circuit breakers which it is desired to improve the coordination of the various parts provided vis-à-vis the electric field during an opening operation of the circuit breaker.
  • High-voltage circuit breakers used to interrupt large short-circuit currents require a relatively large piston to create the overpressure required to blow the arc when opening the circuit breaker. This imposes an extremely wide radial space between the central contact, the rod and the corresponding permanent contact. As a result, electric field values become extremely important at the end of the rod. Thus, the performance of the high-voltage circuit breakers are depreciated, particularly the resistance to the inherent transient recovery voltage due to the power cut of the lines, cables or capacitor banks.
  • the display To fulfill its role, the display must remain stationary at least until the separation of the contacts or until the contacts of the circuit breaker travel a certain distance. At the end of this run, the position they arrived at is considered to be the starting point where the values of the electric field on the ends of the contacts start to be critical. At this determined moment, the screen must begin to move with one of the contacts until the end of the race of the latter. Pre-compressed springs define the initial position of the screen.
  • the document US Patent 6,410,873 uses a very complicated mechanism composed of levers systems.
  • the document US Patent 4,132,876 ( figure 1 ) implements a simple movement of contact with a screen operated by insulating rods. These very complicated mechanisms are unreliable for metal-enclosed circuit breakers in which external screens are generally used.
  • the screen does not need to follow the rod which is fixed. Thus, it stops when it reaches the desired position.
  • the screen is actuated ideally via the nozzle, by means of a mechanism that also plays the role of a double-motion transmission system. So the screen, as for the documents presented previously, moves in a direction opposite to that of the stem, which is the contact that one wishes to protect. Thus, the effectiveness of such a device is low.
  • the end position is much more advanced than that of the rod. Therefore, it is much more difficult to ensure a sufficient ratio between the electric field on the arcing contacts and that on the permanent contacts such that when a breakdown occurs, it always occurs between the arcing contacts.
  • one of the disadvantages of this mechanism is that the mechanical shocks are cashed by the insulating nozzle during closing maneuver, while it is an extremely sensitive part.
  • the object of the invention is to overcome the aforementioned drawbacks relating to the documents mentioned above.
  • the concept according to the invention consists in modifying and / or reducing the radial space between the fixed contact (the arc electrode 4 in the document US 4,132,876 ) and the fixed permanent contact (the permanent contact 13 in the document US 4,132,876 ) presented in figure 1 .
  • This is intended to smooth the equipotential lines. Then, the gradient variation of voltage decreases substantially and thus the electric field at the contact ends is greatly diminished. This lowers the ratio E / N electric field / gas density and reduces the risks of re-ignition, that is to say increases the resistance to the transient recovery voltage inherent due to the power cut lines, cables or batteries of capacitors.
  • the main object of the invention is a high-voltage circuit breaker comprising two movable contacts relative to each other, so as to deviate to effect a power failure, the circuit breaker comprising, among others, a screen which surrounds a first of the two contacts and which has a support housing and must follow during a second part of the stroke of this first of the two contacts, the final position of the screen being defined by compressed springs, the second of the two contacts also having a crankcase.
  • the screen is slidably mounted in the support housing of the first of the two contacts, is fixed to a rudder and is driven by a central body secured to the support of the second of the two contacts, during the separation of the two contacts as soon as possible.
  • the screen having a stop that is integral with it and positioned to come into contact with the rudder and to drive the screen in the second part of the relative stroke of the first movable contact by coming into contact with the latter, when sliding apart, the housing of the first movable contact with the housing of the second movable contact , the two contacts moving in opposite directions with respect to each other.
  • the first contact support casing and the second contact support are preferably slidably mounted relative to the fixed frame of the circuit breaker.
  • the stop is mounted on a rod screwed into the screen.
  • circuit breaker has rods screwed into the screen to pre-compress the springs.
  • the figure 2 shows, in section, the central part of the circuit breaker according to the invention, for the purpose of locating the screen 1, which is movable and which is intended to be positioned in a predetermined manner around a first movable contact 2, consisting of the end of a rod 3, translating longitudinally in the circuit breaker, in the center thereof.
  • the other contact 6 consists of a hollow tip, of revolution, placed in a cover 7, itself placed on a second contact support 8.
  • blowing nozzle 5 comprising a first conical portion 5A, placed on the right in the figures, on the side of the first contact 2, a central and cylindrical body 5C and a part extended 5B placed on the side of the second contact 6.
  • This blowing nozzle 5 allows to concentrate the jet of gas at the determined moment to blow the arc when the two contacts 2 and 6 move away from each other.
  • the assembly is structured by a central insulating tube 14 through which the movement of the second contact 6 (motor) is transmitted to the first contact 2, placed around the blowing nozzle 5.
  • a first contact support casing 16 is fixed in a crossbar 15 carrying the rod 3, at the end of which is the first contact 2.
  • a second contact housing 10 is placed around the second contact support 8 carrying the second contact 6.
  • One of the main parts of the circuit breaker, according to the invention, is a screen 1 placed inside a fixed body 9, positioned on the inner wall of the first contact support casing 16 attached to a lifter 15. Its shape is therefore of hollow revolution and surrounds globally, at a determined distance, the left part of the rod 3. Its role is to follow the latter, in particular the first contact 2 constituting its end, from a given moment of the respective stroke of the two contacts 2 and 6.
  • the presence of the screen 1 contributes to reducing the variation of voltage gradient and thus significantly reduce the electric field at the end of the first contact 2.
  • Springs 17 are supported on a flange 18, at the right end of the central body 14. Its other left end is supported on the inner face 19 of the screen 1.
  • the springs 17 are pre-compressed via the rods 29 screwed into the left end of the screen 1 and attached via a stop 28 of the flange 18 so that they can slide in the flange 18.
  • the two contacts 2 and 6 are in contact with each other. More precisely, the first contact 2 is located inside the second contact 6 of hollow form of revolution.
  • the second contact support assembly 8 is placed a little to the left, inside the second contact housing 10.
  • the left end 20 of the first contact support housing 16 surrounds the right end 21 of the second housing contact 10.
  • the assembly located inside the central body 14 is completely surrounded by the first contact support casing 16, since the central body 14 is integral with the second contact casing 10. There is therefore a sliding of the first contact support casing 16 around the whole of the second contact housing 10 and the central body 14.
  • the three Figures 3A, 3B and 3C show, among others, the actuation of all its parts of the circuit breaker, thanks, in particular, to three levers, which are a control lever 22, pivotally mounted about a horizontal axis 23, which is fixed relative to the together, that is to say fixed relative to a frame on which is fixed the circuit breaker.
  • control lever 22 In the closed position of the circuit breaker, illustrated by this figure 3A , the control lever 22 has a first end 22A, to which is mounted, in an articulated manner, a first end 24A of a first operating lever 24 whose other end 24B is hingedly mounted on the central portion of the rudder 15.
  • a second end 22B of the control lever 22 is hingedly connected to a first end 25A of two second operating levers 25, whose second end is hingedly mounted on an end ring 26 of the part flared 5A of the blast nozzle 5, also integral with the assembly of the central body 14 and the second contact casing 10.
  • control lever 22 continued its rotation and pulled the first operating lever 24 to the right, pulling at its maximum the rod 3 and the contact 2 to the right.
  • the figure 3C shows the end of this compression of springs 17.
  • the screen 1 was thus driven, together with the compression of the springs 17 to the right, by means of the stop 30, placed to the right of the rod 31.
  • the main advantage of this circuit breaker is an improved resistance to the transient recovery voltage inherent due to the power cut of the lines, cables or capacitor banks, especially for very high voltages.
  • the Figures 4A and 4B illustrate the values of the gradient of the electric field calculated for a speed of 13 m / s without moving screen.
  • the Figures 5A and 5B illustrate the values of the gradient of the electric field calculated for a speed of 19 m / s without a mobile screen and the Figures 6A and 6B illustrate the values of the gradient of the electric field calculated for a speed of 13 m / s with moving screen.
  • the results presented relate to the voltage that has been applied on the side of the rod (first movable contact 2) and on the Figures 4B , 5B, 6B , the calculations presented relate to the voltage that has been applied to the side of the tulip (second movable contact 6).

Landscapes

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

Claims (5)

  1. Hochspannungsschutzschalter mit zwei Kontaktstücken (2, 6), die so zueinander beweglich sind, dass sie sich voneinander entfernen, um ein Abschalten des elektrischen Stroms zu bewirken, wobei der Schutzschalter unter anderem aufweist:
    - eine Abschirmung (1), die ein erstes der beiden Kontaktstücke (2) umgibt und ein Traggehäuse (16) für das erste Kontaktstück besitzt, wobei die Abschirmung (1) diesem Traggehäuse (16) für das erste Kontaktstück (16) und dem ersten Kontaktstück (2) während eines zweiten Teils der Verlagerung der Einheit aus erstem Kontakt (2) und seinem Traggehäuse (16) für das erste Kontaktstück folgen muss, wobei die Endstellung der Abschirmung (1) durch die Komprimierung von zusammengedrückten Federn (17) definiert wird, wobei das zweite Kontaktstück (6) einen Halter (8) für das zweite Kontaktstück aufweist, dadurch gekennzeichnet, dass die Abschirmung (1) in dem Traggehäuse (16) für das erste Kontaktstück gleitbeweglich gelagert ist, das an einer Traverse (15) befestigt ist, und von einem Mittelstück (14), das fest mit dem Halter (8) für das zweite Kontaktstück verbunden ist, bei der relativen Trennung der beiden beweglichen Kontaktstücke (2, 6) angetrieben wird, und zwar bei beginnender Verlagerung dieses Halters (8) für das zweite Kontaktstück und mit Hilfe der Federn (17), die mit einem ersten, links gelegenen Ende an die Abschirmung (1) und mit einem zweiten Ende an das rechte Ende des Mittelstücks (14) befestigt sind, wobei die Abschirmung (1) einen Anschlag (30) aufweist, der fest mit dieser verbunden ist und so positioniert ist, dass er mit der Traverse (15) in Kontakt tritt und die Abschirmung (1) mitnimmt, und zwar während des zweiten Teils der Verlagerung des Traggehäuses (16) für das erste Kontaktstück (16) bei dessen Gleitbewegung aufgrund der Entfernung zweier beweglicher Kontaktstücke (2) und (6), die sich in entgegengesetzter Richtung bewegen, voneinander weg sowie von ihrem Gehäuse bzw. Halter weg.
  2. Hochspannungsschutzschalter nach Anspruch 1, dadurch gekennzeichnet, dass die relative Bewegung der Elemente, die diesen bilden, gesteuert werden über:
    - einen Steuerhebel (22), der zu seiner Mitte hin um eine Achse (23) verschwenkbar ist, die gegenüber einem Gestell fest ist und über Antriebsmittel drehbetätigt wird,
    - einen ersten Betätigungshebel (24), der mit einem ersten Ende (24A) an einem ersten Ende (22A) des Steuerhebels (22) verschwenkbar gelagert ist und mit einem zweiten Ende (24B) am Traggehäuse (16) für das erste Kontaktstück über die Traverse (15) verschwenkbar gelagert ist, und
    - zweite Betätigungshebel (25), die mit einem ersten Ende (25A) an einem zweiten Ende (22B) des Steuerhebels (22) verschwenkbar gelagert sind und mit einem zweiten Ende (25B) an dem Halter für das zweite Kontaktstück (8) verschwenkbar gelagert sind.
  3. Hochspannungsschutzschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Traggehäuse (16) für das erste Kontaktstück und der Halter (8) für das zweite Kontaktstück gegenüber einem festen Körper (9) gleitbeweglich gelagert sind, so dass sie sich in entgegengesetzten Richtungen voneinander entfernen.
  4. Hochspannungsschutzschalter nach Anspruch 1, dadurch gekennzeichnet, dass der Anschlag (30) an einer mit der Abschirmung (1) verschraubten Stange (31) montiert ist.
  5. Hochspannungsschutzschalter nach Anspruch 1, dadurch gekennzeichnet, dass er in die Abschirmung (1) eingeschraubte Stangen (29) besitzt, um die Federn (17) unter Vorspannung zusammenzudrücken.
EP10787765.6A 2009-12-09 2010-12-07 Hochspannungsschutzschalter mit entfernbarer abschirmung zur verbesserung des feldgradienten Not-in-force EP2510530B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0958771A FR2953639B1 (fr) 2009-12-09 2009-12-09 Disjoncteur a haute tension a ecran amovible pour l'amelioration du gradient de champ
PCT/EP2010/069087 WO2011070022A1 (fr) 2009-12-09 2010-12-07 Disjoncteur a haute tension a ecran amovible pour l'amelioration du gradient de champ

Publications (2)

Publication Number Publication Date
EP2510530A1 EP2510530A1 (de) 2012-10-17
EP2510530B1 true EP2510530B1 (de) 2014-04-16

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ID=42315805

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Application Number Title Priority Date Filing Date
EP10787765.6A Not-in-force EP2510530B1 (de) 2009-12-09 2010-12-07 Hochspannungsschutzschalter mit entfernbarer abschirmung zur verbesserung des feldgradienten

Country Status (4)

Country Link
EP (1) EP2510530B1 (de)
CN (1) CN102725810B (de)
FR (1) FR2953639B1 (de)
WO (1) WO2011070022A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982069B1 (fr) * 2011-10-27 2013-12-20 Alstom Technology Ltd Chambre de coupure dotee d'un tube limitant l'impact de la generation de particules et appareillage electrique de coupure equipe d'une telle chambre de coupure
CN102881477B (zh) * 2012-09-24 2014-12-24 中国西电电气股份有限公司 一种双滑移传动机构
FR3008225B1 (fr) * 2013-07-08 2016-11-25 Alstom Technology Ltd Disjoncteur a ecran amovible
EP3151261B1 (de) 2015-10-02 2019-06-12 Siemens Aktiengesellschaft Trennschalter mit nockenscheibe für mittel- und hochspannungen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140284A1 (de) * 1971-08-06 1973-02-15 Siemens Ag Elektrischer druckgasschalter
JPS5238173A (en) * 1975-09-22 1977-03-24 Hitachi Ltd Buffer gas breaker
CH644969A5 (de) 1979-09-25 1984-08-31 Sprecher & Schuh Ag Druckgasschalter.
EP0754345B1 (de) 1994-04-05 2002-08-28 ABB POWER T & D COMPANY INC. Bewegbare gasmischplatte für autopneumatischen druckgasschalter
US5478980A (en) 1994-04-05 1995-12-26 Abb Power T&D Company, Inc. Compact low force dead tank circuit breaker interrupter
DE19622460C2 (de) * 1996-05-24 1998-04-02 Siemens Ag Hochspannungs-Leistungsschalter mit zwei antreibbaren Schaltkontaktstücken
FR2783088B1 (fr) * 1998-09-09 2000-10-13 Alstom Technology Interrupteur avec un systeme d'insertion d'une resistance a longue duree d'insertion
DE29901205U1 (de) 1999-01-15 1999-05-12 Siemens Ag Hochspannungsleistungsschalter, insbesondere Druckgasleistungsschalter
DE19902835C2 (de) 1999-01-20 2001-12-06 Siemens Ag Hochspannungsleistungsschalter mit einer Isolierdüse
FR2826503B1 (fr) * 2001-06-25 2003-09-05 Alstom Chambre de coupure avec ampoule a vide

Also Published As

Publication number Publication date
EP2510530A1 (de) 2012-10-17
WO2011070022A1 (fr) 2011-06-16
CN102725810A (zh) 2012-10-10
CN102725810B (zh) 2015-04-01
FR2953639B1 (fr) 2012-01-13
FR2953639A1 (fr) 2011-06-10

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