EP2306482B1 - Assemblage de terminal de circuit principal pour disjoncteur à vide - Google Patents

Assemblage de terminal de circuit principal pour disjoncteur à vide Download PDF

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Publication number
EP2306482B1
EP2306482B1 EP20090172183 EP09172183A EP2306482B1 EP 2306482 B1 EP2306482 B1 EP 2306482B1 EP 20090172183 EP20090172183 EP 20090172183 EP 09172183 A EP09172183 A EP 09172183A EP 2306482 B1 EP2306482 B1 EP 2306482B1
Authority
EP
European Patent Office
Prior art keywords
clamp
main circuit
terminal assembly
heat sink
movable unit
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.)
Revoked
Application number
EP20090172183
Other languages
German (de)
English (en)
Other versions
EP2306482A1 (fr
Inventor
Jae-Yong Lee
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.)
LS Electric Co Ltd
Original Assignee
LS Industrial Systems Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41722737&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2306482(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by LS Industrial Systems Co Ltd filed Critical LS Industrial Systems Co Ltd
Priority to EP20090172183 priority Critical patent/EP2306482B1/fr
Priority to ES09172183T priority patent/ES2440697T3/es
Publication of EP2306482A1 publication Critical patent/EP2306482A1/fr
Application granted granted Critical
Publication of EP2306482B1 publication Critical patent/EP2306482B1/fr
Revoked 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
    • H01H33/60—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
    • H01H33/6606—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H33/6606—Terminal arrangements
    • H01H2033/6613—Cooling arrangements directly associated with the terminal arrangements

Definitions

  • the present invention relates to a vacuum circuit breaker, and more particularly, to a main circuit terminal assembly for a vacuum circuit breaker.
  • WO 2009/074016 A1 discloses a circuit breaker that comprises a vacuum chamber, a fixed contact and a movable contact disposed in the vacuum chamber, a fixed contact stem supporting the fixed contact in the vacuum chamber and extending outwards from a first end of the vacuum chamber, a movable contact stem supporting the movable contact in the vacuum chamber for reciprocal movement between contacting with and separating from the fixed contact, and extending outwards from a second end of the vacuum chamber, a first electrical conductor coupled to the fixed contact stem, a second electrical conductor coupled to the movable contact stem, and at least one heat dissipating means.
  • a vacuum circuit breaker is an electrical device to protect load equipment and an electrical line from an overload or overcurrent which may occur in an electrical circuit due to an accident in the circuit (e.g., a short-circuit, or the like), by breaking the electrical circuit.
  • a vacuum circuit breaker which requires a small installation area as well as a large capacity, a small-sized vacuum circuit breaker has been developed to conduct a large rated current therethrough. Accordingly, temperature increase of the vacuum circuit breaker by the large current has been considered as an important issue.
  • a main circuit unit includes a vacuum interrupter having a fixed contact and a movable contact for opening or closing a circuit in a vacuum container, and a terminal unit for respectively being connected to the fixed contact and the movable contact of the vacuum interrupter and being connected to a circuit between a power source and an electrical load.
  • heat is mainly generated in a main conductive unit including a bus bar of the terminal unit, a connection terminal for a connection with the circuit, a clamp for connecting the bus bar to the vacuum interrupter.
  • the clamp does not have enough surface area as well as any means for effective heat radiation, thus to make it difficult to prevent temperature increase of a conductor.
  • Said object of the present invention can be achieved by providing a main circuit terminal assembly according to claim 1.
  • the main circuit terminal assembly for a vacuum circuit breaker is a device for electrically being connected to a vacuum interrupter 1, and includes a clamp 2, a heat sink 3, a flexible shunt 4, a terminal block 5, and a contactor unit 6.
  • the vacuum interrupter 1 is generally configured to open or close contacts in a vacuum inner space of a cylindrical vacuum container configured of a ceramic material. A fixed contact and a movable contact are provided inside the vacuum container.
  • the vacuum interrupter 1 has a movable unit 1 a connected to the movable contact so as to be movable to open position or close position of the movable contact, and extending to an outside of the vacuum container. As shown in Fig. 2 , the movable unit 1a is downwardly extended from the vacuum interrupter 1.
  • the clamp 2 is electrically connected to the movable unit 1 a of the vacuum interrupter 1.
  • the clamp 2 is implemented as a pair of electrical conductors such that the movable unit 1 a is supported by being fitted therein.
  • the clamp 2 is configured of pure copper with an excellent conductivity to function as an electrical conductive path. Descriptions of detailed construction of the clamp 2 will be given with reference to Fig. 3 .
  • the heat sink 3 is fixed to the clamp 2 so as to increase a surface area of the clamp 2.
  • the heat sink 3 may be manufactured by aluminum molding. Descriptions of a detailed construction of the heat sink 3 will be given with reference to Fig. 4 .
  • the flexible shunt 4 has one end thereof electrically and mechanically (electrically and mechanically) connected to the clamp 2, and is configured as a flexible electrical conductor to enable the movement of the movable unit 1a.
  • the flexible shunt 4 may be configured in which a plurality of thin films configured of pure copper having an excellent conductivity are laminated, and both ends thereof are compressed and welded.
  • the terminal block 5 is electrically and mechanically connected to another end (i.e., opposite to the one end connected to the clamp) of the flexible shunt 4, and may be implemented as an electrical conductor, such as a copper alloy (e.g., pure cooper, brass, or the like).
  • a copper alloy e.g., pure cooper, brass, or the like.
  • the contactor unit 6 is configured as an electrical conductor and is electrically connected to the terminal block 5.
  • the contactor unit 6 includes a plurality of clip-shaped contactors.
  • the clip-shaped contactors are configured in which a plurality of conductive bars, so called 'fingers,' configured as an electrical conductor are arranged in a cylindrical shape, and the plurality of conductive bars are fastened by a ring having elasticity so as to prevent a separation of the conductive bars and to restore its original shape.
  • the clip-shaped contactors in a conventional vacuum circuit breaker are electrically and mechanically connected to a terminal unit of a cradle having connection terminal units for a power source side and an electrical load side.
  • the clamp 2 In order to maximize an installation space of the heat sink 3 by minimizing an area being connected by the flexible shunt 4, the clamp 2 includes horizontal slit portions 2b and 2b' for fitting (inserting) respective end portions of the flexible shunt 4 thereto.
  • the slit portions 2b and 2b' and the end portions of the flexible shunt 4 are connected by welding.
  • the clamp 2 is comprises a pair of clamp pieces: a first clamp piece 2a and a second clamp piece 2a'.
  • the first and second clamp pieces 2a and 2a' include upper surface portions 2f for mounting the heat sink 3 thereon, and the slit portions 2b and 2b' disposed at a lower portion thereof for fitting the respective end portions of the flexible shunt 4 thereinto.
  • the first and second clamp pieces 2a and 2a' have movable unit supporting grooves 2c and 2c' each vertically extending from a central portion of a rear surface thereof and having a semicircular cross section such that the movable unit 1 a of the vacuum interrupter 1 is fitted thereinto so as to be supported.
  • each of the first and second clamp pieces 2a and 2a' includes four clamp fastening means insertion holes 2d for allowing to insert clamp fastening means (not shown).
  • the insertion holes 2d are penetratingly configured at the front surfaces of the first and second clamp pieces 2a and 2a' toward the rear surfaces thereof.
  • the clamp fastening means is a means to support the movable unit 1a of the vacuum interrupter 1 while fastening the first and second clamp pieces 2a and 2a'.
  • the clamp fastening means may comprises bolts and nuts sized to be inserted into the insertion holes 2d.
  • the first and second clamp pieces 2a and 2a' may respectively have heat sink fixing screw insertion holes 2e disposed at both sides (right and left) thereof such that screws for fixing the heat sink 3 are inserted thereinto.
  • the heat sink fixing screw insertion holes 2e may be configured as female threaded holes by a tapping process.
  • the fixing screws to be inserted into the heat sink fixing screw insertion holes 2e generally includes a threaded portion tapering to a point at one end with a helical ridge configured on it, and a head portion at the other end thereof with screwdriver insertion grooves.
  • Figure 4 is a perspective view showing a heat sink in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention.
  • the heat sink 3 includes a plurality of cooling fins 3a vertically extending and spaced from each other at a predetermined interval so as to form a convection passage (flow) of air between the cooling fins 3a.
  • the heat sink 3 is positioned, as shown in Fig. 1 , such that the cooling fins 3a are vertically extended, thus to form a plurality of convection passages of air between the cooling fins 3a.
  • a pair of fixing screw holes 3b are provided at both ends of the heat sink 3 so as to fix the heat sink 3 onto the upper surface portion 2f of the clamp 2.
  • Figure 5 is a perspective view showing an assembly of the clamp and a flexible shunt in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention. As shown in Fig. 5 , the assembly (connection) between the clamp and the flexible shunt in the main circuit terminal assembly for a vacuum circuit breaker according to the present invention is performed as follows:
  • each lower portion of the flexible shunt 4 includes four fixing screw insertion holes 4a spaced from each other at a predetermined interval. Such fixing screw insertion holes 4a function as insertion holes for the bolts (not shown) used to connect the flexible shunt 4 to the terminal block 5 as shown in Fig. 1 .
  • the movable unit 1 a extending from the lower portion of the vacuum interrupter 1 is inserted (fitted) between the first and second clamp pieces 2a and 2a', more specifically, between the pair of movable unit clamping grooves 2c and 2c'.
  • the fastening means such as bolts and nuts (not shown) are inserted into the respective clamp fastening means insertion holes 2d for threaded coupling, thereby allowing the first and second clamp pieces 2a and 2a' to contact and support the movable unit 1a. Accordingly, the electric current may be conducted from the movable unit 1 a toward the first and second clamp pieces 2a and 2a'.
  • the heat sinks 3 are disposed on the respective upper surface portions 2f of the first and second clamp pieces 2a and 2a' such that the cooling fins 3a of the heat sink 3 are positioned vertically. Fixing screws are inserted into the respective fixing screw holes 3b of the heat sink 3 and the respective heat sink fixing screw insertion holes 2e of the clamp 2, thus to complete the assembly of the clamp 2 and the heat sink 3.
  • the upper end portions of the flexible shunt 4 are fitted into the slit portions 2b and 2b', and the upper end portions of the flexible shunt 4 and the slit portions 2b and 2b' are welded for connection, thus to complete the assembly of the clamp 2 and the flexible shunt 4.
  • the fixing screw insertion holes 4a configured at the lower portions of the flexible shunt 4 are aligned with the screw insertion holes (not shown) configured at both side surfaces of the terminal block 5 so as to be coupled to each other using bolts and nuts (not shown), thus to complete the assembly of the flexible shunt 4 and the terminal block 5.
  • the terminal block 5 and the contactor unit 6 are pre-assembled.
  • a conductive current in an electrical circuit which is introduced from the fixed contact of the vacuum interrupter 1 and flow out to the load side via the contactor unit 6 and the terminal unit of the cradle (not shown) passes through, as shown in Fig. 1 , the movable unit 1 a of the vacuum interrupter 1. Then, the current passes through the clamp 2, the flexible shunt 4, the terminal block 5 and the contactor unit 6, sequentially, thereby flowing to the terminal unit of the cradle.
  • heat generating between the movable unit 1 a and the clamp 2 having the movable unit 1a therebetween may be effectively cooled down since the surface area of the clamp 2 is greatly increased by the heat sink 3 fixed to the clamp 2.
  • the cooling fins 3a of the heat sink 3 are vertically positioned for the convection of the air, thus to provide a passage (path) allowing the air to flow in a space between the cooling fins 3a. Therefore, the cooling effect for the clamp 2 may greatly be enhanced.
  • connection unit between the clamp 2 and the flexible shunt 4 is configured in which the end portions of the flexible shunt 4 are inserted into the respective slit portions 2b and 2b' horizontally configured at the lower portions of the clamp 2 and connected by welding, thus to minimize an area of the clamp 2 to be contacted by the flexible shunt 4 as well as secure an enough area for contact with the heat sink.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (6)

  1. Un bloc de borne de circuit principal pour un coupe-circuit à vide qui est électriquement relié à un interrupteur à vide, comprenant :
    une pince (2) électriquement reliée à une unité mobile de l'interrupteur à vide, et qui comprend une paire de conducteurs qui supportent l'unité mobile par pincement ;
    un drain thermique (3) fixé à la pince (2) qui augmente une étendue de surface de la pince (2) ;
    un shunt flexible (4) dont l'une des extrémités est reliée électriquement et mécaniquement à la pince (2), et qui comprend un conducteur flexible permettant à l'unité mobile de se déplacer ;
    un bloc de borne (5) électriquement et mécaniquement relié à l'autre extrémité du shunt flexible (4), et configuré en un conducteur électrique ; et
    une unité de contacteurs (6) électriquement reliée au bloc de borne (5) et possédant une pluralité de contacteurs en forme d'agrafes,
    caractérisé en ce que la pince (2) possède des parties en fente horizontales (2b, 2b') configurées pour insérer des parties d'extrémité du shunt flexible (4) à l'intérieur et pour être reliées à celui-ci par soudage, de manière à garantir un espace d'installation du drain thermique (3) par minimisation d'une surface sur laquelle vient en contact le shunt flexible (4).
  2. Le bloc de borne de circuit principal de la revendication 1, dans lequel la pince (2) comprend une paire de pièces de pince (2a, 2a'), et
    chacune des pièces de pince (2a, 2a') comprend :
    une partie de surface supérieure plate (2f) pour y monter dessus le drain thermique (3) ; et
    la partie en fente (2b, 2b') y étant disposée sur une partie inférieure de manière à insérer la partie d'extrémité du shunt flexible (4) et pour y être reliée par soudage.
  3. Le bloc de borne de circuit principal de la revendication 1, dans lequel le drain thermique (3) comprend une pluralité d'ailettes de refroidissement (3a) s'étendant verticalement et à distance les unes des autres à un intervalle prédéterminé qui forme un passage d'air pour la convection.
  4. Le bloc de borne de circuit principal de la revendication 1, dans lequel chacune des pièces de la pince (2a, 2a') comprend une gorge de support d'unité mobile (2c ou 2c') s'étendant verticalement à partir d'une partie centrale d'une surface arrière de celle-ci et présentant une section droite semi-circulaire de sorte que l'unité mobile de l'interrupteur à vide s'adapte à l'intérieur de manière à pouvoir y être supportée.
  5. Le bloc de borne de circuit principal de la revendication 1, comprenant en outre :
    des moyens de fixation de pince pour fixer la paire de pièces de pince (2a, 2a') de manière à s'adapter à l'intérieur et supporter l'unité mobile de l'interrupteur à vide entre la paire de pièces de pince (2a, 2a').
  6. Le bloc de borne de circuit principal de la revendication 5, dans lequel les moyens de fixation de pince comprennent des vis insérées dans des orifices d'insertion de moyens de fixation de la pince formés sur chaque pièce de pince et des écrous couplés par filetage aux vis.
EP20090172183 2009-10-05 2009-10-05 Assemblage de terminal de circuit principal pour disjoncteur à vide Revoked EP2306482B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20090172183 EP2306482B1 (fr) 2009-10-05 2009-10-05 Assemblage de terminal de circuit principal pour disjoncteur à vide
ES09172183T ES2440697T3 (es) 2009-10-05 2009-10-05 Montaje de terminal de circuito principal para disyuntor de vacío

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090172183 EP2306482B1 (fr) 2009-10-05 2009-10-05 Assemblage de terminal de circuit principal pour disjoncteur à vide

Publications (2)

Publication Number Publication Date
EP2306482A1 EP2306482A1 (fr) 2011-04-06
EP2306482B1 true EP2306482B1 (fr) 2013-09-25

Family

ID=41722737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090172183 Revoked EP2306482B1 (fr) 2009-10-05 2009-10-05 Assemblage de terminal de circuit principal pour disjoncteur à vide

Country Status (2)

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EP (1) EP2306482B1 (fr)
ES (1) ES2440697T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050327B (zh) * 2012-12-31 2016-01-13 青岛特锐德电气股份有限公司 真空断路器及中压充气柜
DE102017206866A1 (de) * 2017-04-24 2018-10-25 Siemens Aktiengesellschaft Anschlusselement für einen Bewegkontakt einer Vakuumschaltröhre und gasisolierte Schaltanlage mit einem Anschlusselement für einen Bewegkontakt einer Vakuumschaltröhre
DE102017206929B4 (de) * 2017-04-25 2023-08-10 Siemens Aktiengesellschaft Anschlusselement für eine Vakuumschaltröhre für eine Schaltanlage
US20220328271A1 (en) * 2021-04-07 2022-10-13 Eaton Intelligent Power Limited Current interrupting module with a resettable current interruption device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004050786C5 (de) * 2004-10-14 2008-03-06 Siemens Ag Kupplungsvorrichtung mit Kühlkörper
WO2009079871A1 (fr) * 2007-12-07 2009-07-02 Abb (China) Limited Disjoncteur avec moyens de dissipation thermique

Also Published As

Publication number Publication date
EP2306482A1 (fr) 2011-04-06
ES2440697T3 (es) 2014-01-30

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