EP1906425B1 - Betätigung von Kontakten einer Schaltkammer mittels Kulissenzylinder mit Doppelantrieb - Google Patents

Betätigung von Kontakten einer Schaltkammer mittels Kulissenzylinder mit Doppelantrieb Download PDF

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Publication number
EP1906425B1
EP1906425B1 EP07117220A EP07117220A EP1906425B1 EP 1906425 B1 EP1906425 B1 EP 1906425B1 EP 07117220 A EP07117220 A EP 07117220A EP 07117220 A EP07117220 A EP 07117220A EP 1906425 B1 EP1906425 B1 EP 1906425B1
Authority
EP
European Patent Office
Prior art keywords
contact
axis
cylinder
chamber according
interrupting chamber
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
EP07117220A
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English (en)
French (fr)
Other versions
EP1906425A1 (de
Inventor
Jean-Luc Bourgeois
Joël Ozil
Christophe Creusot
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.)
Grid Solutions SAS
Original Assignee
Areva T&D SAS
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 Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP1906425A1 publication Critical patent/EP1906425A1/de
Application granted granted Critical
Publication of EP1906425B1 publication Critical patent/EP1906425B1/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
    • H01H33/70—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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact
    • 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
    • H01H2033/028—Details the cooperating contacts being both actuated simultaneously in opposite directions
    • 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
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

  • the invention relates to high or medium voltage circuit breakers, whose operating energy is reduced by a double movement of the contacts.
  • the invention relates to the actuation in opposite directions of the contacts of a circuit breaker breaking chamber via a cylindrical cam.
  • the medium and high voltage switchgear apparatus comprises a pair of movable contacts relative to each other between a closed position in which the electric current can flow and an open position in which the electric current is interrupted.
  • the speed of separation between the contacts is one of the main parameters to guarantee the dielectric strength of the circuit breaker when it is opened.
  • main contact an electrical contact (with its corona shield) through which the nominal current flows;
  • movable contact the main contact assembly and arc contact directly connected to the operating member.
  • the opposite moving contact also composed of a main contact and an arc contact, is moved via a kinematic, which is itself connected to the moving contact.
  • the document EP 0 822 565 described in the preamble of claim 1 a circuit breaker for high and medium voltage in which a lever with two arms, one being connected to a nozzle secured to a first contact and the other to a second contact, allows the movement first contact simultaneously causes the second contact in the opposite direction.
  • the invention proposes, among other advantages, to overcome the drawbacks described above, and in particular to allow better reliability for a double-contact interrupting chamber contacts.
  • the invention thus relates to the use of a cylindrical cam to move in inverse translation two contacts of a breaking chamber: the movement in a direction of the main contact causes the rotation of a cylinder that drives the movement in the opposite direction of the second opposite contact; according to one option, the actuation of the cylinder itself causes the two contacts to move in opposite directions.
  • Each of the contacts is connected by a rod which is attached to a member which slides in a cylinder lumen.
  • the design of the lights is carried out to obtain a specific speed ratio.
  • the light relative to the driving of the main contact may comprise parts of different inclinations with respect to the axis, and in particular at least one longitudinal end portion along the axis: when triggering the movement of the main contact, the rotation of the cylinder is latency as the sliding member moves in this part, for example to allow the contact of reach a certain speed before separation.
  • the invention relates to a breaking chamber for a high or medium voltage circuit breaker which comprises two movable contacts relative to each other in opposite directions along an axis, and held by a contact holder. preferably symmetrical around the axis of displacement of the contacts.
  • the two contacts are connected by connecting means, in particular rods which are fixed at one end, to a driving cylinder provided with slots in which sliding elements secured to the other end of the rods can be moved.
  • a dielectric nozzle is integral with the main contact, and serves as a point of attachment to the corresponding connection means.
  • the drive rods of a contact are doubled, one end of each being fixed to the contact so as to be diametrically opposed, and advantageously interconnected at the other end by a bar. which is orthogonal to them and slides in two symmetrical lights of the cylinder.
  • This configuration makes it possible to limit the forces on the contacts and / or the nozzle.
  • the sliding elements are, for at least part of them, coupled to lugs which also slide in guide grooves arranged in the contact holder of the interrupting chamber.
  • the grooves are parallel to the axis of rotation, so that a pure translational movement of the connection means and therefore the contacts is ensured.
  • the invention in another aspect, relates to a high or medium voltage circuit breaker provided with a breaking chamber whose driving of the contacts is effected by means of a cylindrical cam.
  • FIGS. 1A and 1B schematically represent a double-movement interrupting chamber provided with the drive device according to one embodiment of the invention, respectively in closed and open positions.
  • the Figure 2A shows more precisely a drive system according to a preferred embodiment of the invention, and the Figure 2B illustrates the associated connection means.
  • FIGS. 3A and 3B are two views of a driving cylinder according to one embodiment of the invention.
  • a high or medium voltage circuit breaker comprises a breaking chamber 10 which can be filled with an SF 6 type dielectric gas.
  • the interrupting chamber 10 comprises a first contact 12 and a second contact 14; the first movable contact 12 is composed of an arc contact 12a and a main contact (not shown), and the second contact (or opposite movable contact) 14 is also composed of an arc contact 14a and a main contact 14b.
  • the first contact 12 comprises a part in the form of a racking-in pliers and the second contact 14 comprises a portion in cylindrical form that can be inserted into the racking-in tongs: these two elements collaborate between a closed position ( Figure 1A ) in which the two contacts 12, 14 allow the passage of the electric current between them and an open position ( Figure 1B ) in which they are separated from each other.
  • the two contacts 12, 14 move in opposite directions; the main contacts 14b separate, then the arcing contacts 12a, 14a separate, after a possible latency period created by the length of the racking, forming an electric arc that extinguishes by the subsequent spacing of the contacts 12 14.
  • the main contact here the first contact 12 (even if, in the claims in particular, it could be the second contact 14) is usually secured to a nozzle 16 of dielectric material , extending the clamp plugging 12 to the second contact 14, which itself extends a gas compression volume: this dielectric nozzle forming a neck serves as a gas blowing nozzle from the compression volume towards the electric arc, and can for example allow degassing in the presence of an electric arc and participate in the blowing of the arc.
  • the two contacts 12, 14 and the nozzle 16 are guided inside a permanent contact holder 18 along the main axis AA of the breaking chamber 10 of the circuit breaker.
  • the breaking chamber 10, the nozzle 16, the first and second contacts 12, 14 are symmetrical about the axis AA; the contact holder 18 may take the usual various forms, including two diametrically opposed rails or four rails spaced 90 °, or a cylindrical envelope.
  • Each of the contacts 12, 14 is actuated in spacing or approximation by means of a single actuating system, comprising an operating member (not shown) and drive means 20.
  • an operating member not shown
  • the movement of the main contact 12 by the operating member during the tripping of the circuit breaker drives the drive means 20 which move the secondary contact 14; an option is that the operating member actuates the drive means 20 which cause the displacement in opposite directions of the contacts 12, 14.
  • the drive means 20 comprise a cylindrical element 22 of revolution about the axis AA of the chamber 10, advantageously located in the contact holder 18 on the side of the second contact 14, that is to say that along the axis AA, there is the following order: main contact 12, nozzle 16, secondary contact 14 and cylinder 22.
  • the drive cylinder 22 preferably has only one degree of freedom, namely the rotation around the AA axis; for example, two locking systems 24, such as bearings or bearings, are arranged on each side of the cylinder 22 along the axis AA (see Figure 2A ).
  • the cylinder 22 acts in the manner of a cam; it is provided with drive lights 26, 28 which pass through its wall in a specific profile, at least part of each light having a slope with respect to the direction of the axis AA, that is to say wrapping around the axis AA, forming a substantially helical pattern.
  • the drive of each of the two contacts 12, 14 is in the opposite direction, the contacts 12, 14 being secured to the lights by connecting means 30.
  • the first light 26 dedicated to the driving of the first contact 12 therefore comprises a portion sloping whose angle is of opposite sign to that of the slope of the second light 28 dedicated to driving the second contact 14.
  • connection means 30 of each of the contacts 12, 14 with its light 26, 28 during the displacement, for facilitate assembly, and to not unnecessarily weaken the cylinder 22, it is preferable that the drive lights 26, 28 of each of the contacts 12, 14 are entirely formed in a clean part of the cylinder 22.
  • an example of configuration thus comprises a first slot 26 serving during the actuation of the first contact 12 and having a substantially helical portion s for example winding clockwise on a first end portion of the cylinder 22 on the side of the contacts 12, 14, then the second end portion of the cylinder 22, opposite the contacts 12, 14 along of the axis AA, has a second slot 28 which comprises a substantially helical portion winding in the trigonometrical direction.
  • the connection between the first contact 12 and the drive device 20 is advantageously carried out by a rod 32, one end of which is fixed to the first contact 12, or preferably to the nozzle 16.
  • the displacement of the rod 32 is authorized only in the direction of translation parallel to the axis AA, for example by fixing bolted to the nozzle 16.
  • the rod 32 is secured at its second end to a sliding element 34 which cooperates with the first light 26: a translation of the first contact 12 and the nozzle 16, for example by means of a known actuator, moves the rod 32 in translation along the axis AA, and causes a displacement of the element sliding 34 in the slot 26, thus causing a rotation of the cylinder 22.
  • the sliding element 34 is preferably guided in a groove 36 formed in the fixed contact holder 18, by the intermediate for example a lug 38 which extends; the groove 36 is parallel to the direction of movement of the contact 12, that is to say parallel to the axis AA ( Figure 2A ).
  • a lug 38 which extends; the groove 36 is parallel to the direction of movement of the contact 12, that is to say parallel to the axis AA ( Figure 2A ).
  • lug 38 may be provided, but it is desirable that it be more or less locked in the groove 36; for example, the groove 36 has an internal enlargement in the wall of the contact holder 18 where it is formed and the lug 38 has a protrusion which is maintained there.
  • the rod 32 is advantageously located inside the cylinder 22 so as to have more latitude in the design of the lights 26, 28 thanks to a larger diameter and therefore a larger developed surface; advantageously, the cylinder 22 has an outer diameter close to the internal diameter of the contact holder 18 or the external diameter of the contacts or nozzle 12, 14, 16.
  • second contact 14 advantageously the same geometry of drive and connection is achieved, with two second rods 42, 42 'fixedly coupled to one end at the second contact 14, and secured at the other end to elements 44, 44 'sliding in two second lumens 28, 28' of the cylinder 22.
  • a second bar 50 perpendicular to the rods 42, 42 ' keeps them apart and cooperates at each end with two rails 46, 46' for guiding the door contact 18 via two pins 48, 48 '.
  • the two holding bars 40, 50 are perpendicular to each other.
  • the second contact 14 is driven only via a single second rod 42, even if the first contact 12 drives two first rods 32, 32 '.
  • Other configurations are also possible, depending on the size, the forces involved, ....
  • the profile of the first and second lights 26, 28 makes it possible to manage the race of the two contacts 12, 14 relative to each other; more precisely, it makes it possible to optimize the stroke of the second contact 14 with respect to that of the main contact 12.
  • the speed and the amplitude of the rotation of the cylinder 22 depend on the speed of the main contact 12 when the circuit breaker and the profile of the (each) first light 26.
  • the rotation of the cylinder 22 and the profile of the (each) second light 28 make it possible to define the amplitude and the speed of displacement of the second movable contact 14.
  • each first light 26 comprises at each end a first portion parallel to the axis AA: at the beginning of actuation in particular, the main contact 12 increases in speed while remaining in the closed position, and it is not useful that the cylindrical cam 22 rotates; once a certain speed is reached, the second contact 14 is driven to obtain a maximum spacing speed during the separation and the arc generation, and the two lights 26, 28 are oriented at an angle almost opposite one another. to the other.
  • the actuation according to the invention is easy to achieve, by simple parts to manufacture and with increased tolerances through the various means to guarantee the displacement in the desired direction, such as the rails 36, 46, the lugs 38, 48, the bars 40, 50, ....
  • the solution according to the invention makes it possible to define an optimal contact displacement profile 12, 14, that is to say to better manage the travel and the speed of displacement of the second opposite contact 14 with respect to the main contact 12, without resorting to complex configuration calculations, and allows easy editing.
  • interrupting chamber 10 can remain the same axial size, which is advantageous especially in the case of an SF 6 circuit breaker.

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Scissors And Nippers (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Switches With Compound Operations (AREA)

Claims (15)

  1. Schaltkammer (10) für einen Hoch- bzw. Mittelspannungsschalter, die längs einer Achse (AA) verläuft und zumindest aufweist:
    - einen ersten und einen zweiten Kontakt (12, 14), die entlang der Achse (AA) beweglich sind und sich zwischen einer Schließstellung, in welcher sie in Kontakt stehen, und einer Offenstellung, in welcher sie voneinander getrennt sind, in entgegengesetzter Richtung zueinander verlagern,
    - Mitnahmemittel (20), mit denen die beiden Kontakte (12, 14) verlagert werden können,
    - Verbindungsmittel (30) zwischen einem jeden Kontakt (12, 14) und den Mitnahmemitteln (20),
    dadurch gekennzeichnet, dass
    - die Mitnahmemittel (20) einen um die Achse (AA) der Kammer (10) drehbaren Hohlzylinder (22) aufweisen,
    - der Zylinder (22) an seiner Wand zumindest einen ersten Schlitz (26) und einen zweiten Schlitz (28) aufweist, die jeweils einen Abschnitt enthalten, der mit einem Winkel umgekehrten Vorzeichens geneigt zur Achse (AA) verläuft,
    - die Verbindungsmittel (30) des ersten (12) bzw. zweiten (14) Kontakts ein erstes (34) bzw. zweites (44) Gleitelement aufweisen, das mit einem ersten (26) bzw. zweiten (28) Schlitz zusammenwirkt,
    - so dass bei Drehung des Zylinders (22) um die Achse (AA) das erste und zweite Gleitelement (34, 44) sich in ihrem jeweiligen Schlitz (26, 28) in umgekehrter Richtung translatorisch entlang der Drehachse (AA) des Zylinders (22) verlagern.
  2. Schaltkammer nach Anspruch 1, enthaltend ein Betätigungsglied, das funktionell mit dem ersten Kontakt (12) verbunden ist, um diesen zu verlagern, wodurch die Drehung des Zylinders (22) und die umgekehrte Verschiebebewegung des zweiten Kontakts (14) hervorgerufen werden.
  3. Schaltkammer nach einem der Ansprüche 1 oder 2, wobei die Verbindungsmittel der beiden Kontakte (12, 14) von identischer Art sind.
  4. Schaltkammer nach Anspruch 1 bis 3, wobei die Verbindungsmittel des ersten Kontakts (12) einen ersten Stift (32) aufweisen, der mit dem einen Ende an das erste Gleitelement (34) befestigt und mit dem anderen Ende fest mit dem ersten Kontakt (12) verbunden ist.
  5. Schaltkammer nach Anspruch 4, wobei der Zylinder (22) zwei erste Schlitze (26, 26') gleichen Musters aufweist, die um 180° voneinander um die Achse versetzt sind, und wobei die Verbindungsmittel des ersten Kontakts (12) zwei erste Stifte (32, 32') aufweisen, von denen das eine Ende fest mit dem ersten Kontakt (12) diametral entgegengesetzt verbunden ist und das andere Ende an ein erstes Gleitelement (34, 34') befestigt ist, das mit einem der ersten Schlitze (26, 26') zusammenwirkt.
  6. Schaltkammer nach Anspruch 5, enthaltend einen Verbindungsstab (40), der die ersten Gleitelemente (34, 34') miteinander verbindet und senkrecht zu den Stiften (32, 32') befestigt ist.
  7. Schaltkammer nach Anspruch 6, wobei die Wand des Zylinders (22) zwei zweite Schlitze (28, 28') aufweist und die zweiten Verbindungsmittel einen zweiten Stab (50) enthalten, der in den zweiten Schlitzen gleitet, wobei die beiden Stäbe (40, 50) einen Winkel von 90° einschließen.
  8. Schaltkammer nach einem der Ansprüche 1 bis 7, enthaltend einen longitudinal verlaufenden Kontaktträger (18), der sich entlang des Zylinders (22) erstreckt, wobei zumindest eines der Gleitelemente (34, 44) von einem Vorsprung (38, 48) fortgesetzt wird, der gleitbeweglich mit einer Führungsrille (36, 46) am Kontaktträger (18) der Kammer (10) zusammenwirkt.
  9. Schaltkammer nach Anspruch 8, wobei jede Führungsrille (36, 46) linear entlang der Achse (AA) verläuft.
  10. Schaltkammer nach einem der Ansprüche 1 bis 9, enthaltend ferner eine Düse (16) aus dielektrischem Material, die fest an den einen Kontakt (12), den sogenannten Hauptkontakt, gekoppelt ist.
  11. Schaltkammer nach Anspruch 10, wobei die Verbindungsmittel des Hauptkontakts (12) direkt fest mit der Düse (16) verbunden sind.
  12. Schaltkammer nach einem der Ansprüche 1 bis 11, wobei der Zylinder beispielsweise über zwei Lager (24) entlang der Achse (AA) verschiebefest gesichert ist.
  13. Schaltkammer nach einem der Ansprüche 1 bis 12, wobei das Profil der ersten Schlitze (26) zum Mitnehmen des ersten Kontakts (12) sich von dem Profil der zweiten Schlitze (28) zum Mitnehmen des zweiten Kontakts (14) unterscheidet.
  14. Schaltkammer nach Anspruch 13, wobei der/die erste(n) Schlitz(e) (26) zum Mitnehmen des ersten Kontakts (12) zumindest einen parallel zur Drehachse (AA) verlaufenden Endabschnitt aufweist/aufweisen.
  15. Hoch- bzw. Mittelspannungsschalter mit einer Schaltkammer nach einem der Ansprüche 1 bis 14.
EP07117220A 2006-09-29 2007-09-26 Betätigung von Kontakten einer Schaltkammer mittels Kulissenzylinder mit Doppelantrieb Not-in-force EP1906425B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0654031A FR2906642B1 (fr) 2006-09-29 2006-09-29 Actionnement par came cylindrique des contacts d'une chambre de coupure a double mouvement.

Publications (2)

Publication Number Publication Date
EP1906425A1 EP1906425A1 (de) 2008-04-02
EP1906425B1 true EP1906425B1 (de) 2009-07-01

Family

ID=37859630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07117220A Not-in-force EP1906425B1 (de) 2006-09-29 2007-09-26 Betätigung von Kontakten einer Schaltkammer mittels Kulissenzylinder mit Doppelantrieb

Country Status (7)

Country Link
US (1) US7777149B2 (de)
EP (1) EP1906425B1 (de)
CN (1) CN101170033B (de)
AT (1) ATE435498T1 (de)
CA (1) CA2603158C (de)
DE (1) DE602007001427D1 (de)
FR (1) FR2906642B1 (de)

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WO2012063251A1 (en) * 2010-11-09 2012-05-18 Crompton Greaves Limited Double motion circuit breaker
USD741688S1 (en) 2013-01-23 2015-10-27 Water Renu Llc Bracket with slotted side walls
FR3001329B1 (fr) * 2013-01-24 2015-02-27 Alstom Technology Ltd Appareillage electrique a double mouvement de contacts comportant un dispositif de renvoi a deux leviers
KR20170044663A (ko) * 2014-07-22 2017-04-25 바라트 헤비 일렉트리컬스 리미티드 상대적 이중 운동 접촉 시스템을 가진 인터럽터 디바이스
CN111463035A (zh) * 2020-04-17 2020-07-28 杭州乐垚生物科技有限公司 一种安全性能高稳定性好的基因工程装置

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Also Published As

Publication number Publication date
US20080078668A1 (en) 2008-04-03
EP1906425A1 (de) 2008-04-02
DE602007001427D1 (de) 2009-08-13
CN101170033A (zh) 2008-04-30
FR2906642B1 (fr) 2008-12-19
CA2603158C (fr) 2014-10-21
CN101170033B (zh) 2012-07-04
FR2906642A1 (fr) 2008-04-04
CA2603158A1 (fr) 2008-03-29
US7777149B2 (en) 2010-08-17
ATE435498T1 (de) 2009-07-15

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