EP0734035A1 - Self-blast circuit breaker with rotating arc - Google Patents

Self-blast circuit breaker with rotating arc Download PDF

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Publication number
EP0734035A1
EP0734035A1 EP96103750A EP96103750A EP0734035A1 EP 0734035 A1 EP0734035 A1 EP 0734035A1 EP 96103750 A EP96103750 A EP 96103750A EP 96103750 A EP96103750 A EP 96103750A EP 0734035 A1 EP0734035 A1 EP 0734035A1
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EP
European Patent Office
Prior art keywords
arcing contact
coil
circuit breaker
self
arc
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.)
Granted
Application number
EP96103750A
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German (de)
French (fr)
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EP0734035B1 (en
Inventor
Alain Schneider Electric Chapusot
Pierre Schneider Electric Chevrier
Jean Claude Schneider Electric Faye
Paul Schneider Electric Glenat
Steve Schneider Electric Rowe
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Schneider Electric Industries 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.)
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Publication date
Application filed by Schneider Electric SE, Schneider Electric Industries SAS filed Critical Schneider Electric SE
Publication of EP0734035A1 publication Critical patent/EP0734035A1/en
Application granted granted Critical
Publication of EP0734035B1 publication Critical patent/EP0734035B1/en
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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of contacts
    • 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
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted

Definitions

  • the object of the invention consists in improving the breaking of a circuit breaker with autoexpansion, independently of the intensity of the current to be interrupted.
  • the circuit breaker according to the invention is characterized in that the breaking chamber also contains a cooling member arranged inside the coil to cool the hot gases in the vicinity of the fixed arcing contact, said cooling member being formed by a metal radiator subject to fixed arcing contact.
  • the radiator is attached to the internal wall of a tubular sleeve separated from the coil by an insulating coating, said sleeve being made of magnetic material to reinforce the magnetic field in the zone of formation of the arc .
  • the presence of the radiator inside the coil limits any stagnation of hot gases near the fixed arcing contact.
  • the radiator is equipped with a plurality of fins to optimize the heat exchange surface with the socket for supplying current to the coil.
  • a breaking chamber 10 of a circuit breaker with autoexpansion and rotating arc is housed inside a sealed envelope (not shown) filled with insulating gas, with high dielectric strength, in particular of sulfur hexafluoride.
  • the breaking chamber 10 contains a fixed annular arcing contact 12 mounted on the internal side of the front end face 14 of an electromagnetic coil 16.
  • the rear face 18 of the cylindrical coil 16 is electrically connected to a conductive sleeve 20 for supplying current sealingly passing through the upper wall 22 of the chamber 10.
  • An insulating coating 24 is inserted radially between the internal lateral wall of the coil 16 , and a tubular sleeve 26 of magnetic material, intended to reinforce the magnetic field in the zone of formation of the arc.
  • the fixed arcing contact 12 is formed by an annular track cooperating by abutment with a movable arcing contact 28 carried by the upper end of a tubular sleeve 30 of conductive material.
  • a compression spring 32 is associated coaxially with the lower end of the sleeve 30, which is further equipped with a control lug 34 capable of being driven in translation by a sliding contact 36 subject to a movable conductive tube 38.
  • the movable tube 38 passes through a sealing hole 40 made in an isolator 42 for closing the chamber 10.
  • the interior of the breaking chamber 10 communicates with the expansion volume of the casing of the circuit breaker through a channel d exhaust 43 delimited by the hollow sleeve 30, so as to generate a gas flow in the event of an increase in pressure caused by the rotation of the arc.
  • the cooling member 44 preferably metallic , is shaped as a radiator 46 joined in thermal contact with the internal cylindrical wall of the sleeve 26, and bearing on the fixed arcing contact 12.
  • the radiator 46 is advantageously equipped with annular fins 48 to optimize the heat exchange surface with the surrounding gaseous medium.
  • the presence of the radiator 46 inside the coil 16 limits any stagnation of hot gases near the fixed arcing contact 16, that is to say in the first part of the arcing zone which is not traversed by the gas flow.
  • the arc is normally extinguished by the gas flow establishing itself through the tubular sleeve 30 for supporting the movable arcing contact 28, constituting the second part of the arcing zone.
  • the effective cooling of the hot gases in the vicinity of the fixed arcing contact 12 contributes to improving the extinction of the arcing and to obtaining an excellent dielectric strength, avoiding any possibility of reclapling on the passage of the current to zero.
  • Such an arrangement of the radiator 46 is particularly effective for breaking low-intensity currents.
  • the gas flow through the tubular movable arcing contact 28 can be improved by incorporating a nozzle with convergent / divergent inside the sleeve 30.
  • the radiator of the cooling member 44 inside the coil 16 can of course be in various embodiments.

Landscapes

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

Abstract

The circuit breaker includes a chamber (10) which encloses within the coil (16), a metal radiator (46), made with a number of fins (48) and put into contact with the fixed arc contact (12) to cool hot gases. The radiator is stuck to the internal wall by a tubular sleeve (26), separated from the coil by an insulating covering (24) in magnetic material to strengthen the magnetic field in the arc region. The fixed contact is an annular track formed on the internal edge of the front surface of the coil while the moving contact is held by a spring (32) against the fixed contact and is linked to the chamber wall by a leakage channel (43). The gas chosen is notably sulphur hexafluoride (SF6).

Description

L'invention est relative à un disjoncteur à autoexpansion et à arc tournant logé à l'intérieur d'une enveloppe étanche remplie de gaz isolant à rigidité diélectrique élevée, notamment de l'hexafluorure de soufre, ladite enveloppe renfermant une chambre de coupure comportant :

  • un contact d'arc fixe annulaire associé à une bobine électromagnétique de mise en rotation de l'arc, ladite bobine cylindrique étant agencée coaxialement autour du contact d'arc fixe,
  • un contact d'arc mobile creux coopérant avec le contact d'arc fixe de manière à occuper une position de fermeture, et une position d'ouverture,
  • et un canal d'échappement disposé entre le contact d'arc mobile creux, et l'enveloppe du disjoncteur.
The invention relates to a self-expanding circuit breaker with a rotating arc housed inside a sealed envelope filled with insulating gas with high dielectric strength, in particular sulfur hexafluoride, said envelope containing a breaking chamber comprising:
  • an annular fixed arcing contact associated with an electromagnetic coil for rotating the arc, said cylindrical coil being arranged coaxially around the fixed arcing contact,
  • a hollow movable arcing contact cooperating with the fixed arcing contact so as to occupy a closed position and an open position,
  • and an exhaust channel disposed between the hollow movable arcing contact, and the casing of the circuit breaker.

L'extinction de l'arc dans les disjoncteurs à autoexpansion résulte de l'écoulement de gaz s'établissant dans le canal d'échappement lors de l'apparition de l'arc à l'intérieur de la chambre de coupure. Lors de la coupure de courants de faibles intensités, l'accroissement modéré de la pression gazeuse peut provoquer une stagnation de gaz chauds au voisinage du contact d'arc fixe. Ces gaz chauds restent stockés dans une zone de la chambre de coupure, qui n'est pas parcourue par l'écoulement gazeux, et on a constaté des phénomènes de reclaquage de l'arc au passage à zéro du courant.The extinction of the arc in autoexpansion circuit breakers results from the flow of gas established in the exhaust channel when the arc appears inside the breaking chamber. When switching off low currents, the moderate increase in gas pressure can cause stagnation of hot gases in the vicinity of the fixed arcing contact. These hot gases remain stored in an area of the breaking chamber, which is not traversed by the gas flow, and phenomena of re-plating of the arc have been observed when the current crosses zero.

L'objet de l'invention consiste à améliorer la coupure d'un disjoncteur à autoexpansion, indépendamment de l'intensité du courant à interrompre.The object of the invention consists in improving the breaking of a circuit breaker with autoexpansion, independently of the intensity of the current to be interrupted.

Le disjoncteur selon l'invention est caractérisé en ce que la chambre de coupure renferme de plus un organe de refroidissement agencé à l'intérieur de la bobine pour refroidir les gaz chauds au voisinage du contact d'arc fixe, ledit organe de refroidissement étant formé par un radiateur métallique assujetti au contact d'arc fixe.The circuit breaker according to the invention is characterized in that the breaking chamber also contains a cooling member arranged inside the coil to cool the hot gases in the vicinity of the fixed arcing contact, said cooling member being formed by a metal radiator subject to fixed arcing contact.

Selon un mode de réalisation préférentiel, le radiateur est accolé à la paroi interne d'un manchon tubulaire séparé de la bobine par un revêtement isolant, ledit manchon étant réalisé en matériau magnétique pour renforcer le champ magnétique dans la zone de formation de l'arc. La présence du radiateur à l'intérieur de la bobine limite toute stagnation de gaz chauds près du contact d'arc fixe.According to a preferred embodiment, the radiator is attached to the internal wall of a tubular sleeve separated from the coil by an insulating coating, said sleeve being made of magnetic material to reinforce the magnetic field in the zone of formation of the arc . The presence of the radiator inside the coil limits any stagnation of hot gases near the fixed arcing contact.

Selon une caractéristique de l'invention, le radiateur est équipe d'une pluralité d'ailettes pour optimiser la surface d'échange thermique avec la douille d'amenée de courant à la bobine.According to a characteristic of the invention, the radiator is equipped with a plurality of fins to optimize the heat exchange surface with the socket for supplying current to the coil.

Il en résulte un refroidissement efficace des gaz chauds au voisinage du contact d'arc fixe, ce qui évite toute possibilité de reclaquage au passage à zéro du courant.This results in efficient cooling of the hot gases in the vicinity of the fixed arcing contact, which avoids any possibility of re-plating when the current crosses zero.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté au dessin annexé, illustrant une vue schématique en coupe axiale de la chambre de coupure d'un disjoncteur à autoexpansion, lequel est représenté en position d'ouverture sur la demi-vue de gauche, et en position de fermeture sur la demi-vue de droite.Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended drawing, illustrating a schematic view in axial section of the breaking chamber of a self-expanding circuit breaker, which is shown in the open position on the left half-view, and in the closed position on the right half-view.

Sur la figure unique, une chambre de coupure 10 d'un disjoncteur à autoexpansion et à arc tournant, est logée à l'intérieur d'une enveloppe (non représentée) étanche remplie de gaz isolant, à rigidité diélectrique élevée, notamment de l'hexafluorure de soufre.In the single figure, a breaking chamber 10 of a circuit breaker with autoexpansion and rotating arc, is housed inside a sealed envelope (not shown) filled with insulating gas, with high dielectric strength, in particular of sulfur hexafluoride.

La chambre de coupure 10 renferme un contact d'arc fixe 12 annulaire monté du côté interne de la face frontale 14 antérieure d'une bobine 16 électromagnétique. La face postérieure 18 de la bobine 16 cylindrique est raccordée électriquement à une douille 20 conductrice d'amenée de courant traversant à étanchéité la paroi supérieure 22 de la chambre 10. Un revêtement isolant 24 est intercalé radialement entre la paroi latérale interne de la bobine 16, et un manchon 26 tubulaire en matériau magnétique, destiné à renforcer le champ magnétique dans la zone de formation de l'arc.The breaking chamber 10 contains a fixed annular arcing contact 12 mounted on the internal side of the front end face 14 of an electromagnetic coil 16. The rear face 18 of the cylindrical coil 16 is electrically connected to a conductive sleeve 20 for supplying current sealingly passing through the upper wall 22 of the chamber 10. An insulating coating 24 is inserted radially between the internal lateral wall of the coil 16 , and a tubular sleeve 26 of magnetic material, intended to reinforce the magnetic field in the zone of formation of the arc.

Le contact d'arc fixe 12 est formé par une piste annulaire coopérant par aboutement avec un contact d'arc mobile 28 porté par l'extrémité supérieure d'un manchon 30 tubulaire en matériau conducteur. Un ressort 32 de compression est associé coaxialement à l'extrémité inférieure du manchon 30, laquelle est équipée en plus d'un ergot de commande 34 susceptible d'être entrainé en translation par un contact glissant 36 assujetti à un tube 38 mobile conducteur.The fixed arcing contact 12 is formed by an annular track cooperating by abutment with a movable arcing contact 28 carried by the upper end of a tubular sleeve 30 of conductive material. A compression spring 32 is associated coaxially with the lower end of the sleeve 30, which is further equipped with a control lug 34 capable of being driven in translation by a sliding contact 36 subject to a movable conductive tube 38.

Le tube 38 mobile traverse à étanchéité un orifice 40 ménagé dans un isolateur 42 d'obturation de la chambre 10. L'intérieur de la chambre de coupure 10 communique avec le volume d'expansion de l'enveloppe du disjoncteur à travers un canal d'échappement 43 délimité par le manchon 30 creux, de manière à engendrer un écoulement gazeux en cas d'augmentation de pression occasionnée par la rotation de l'arc.The movable tube 38 passes through a sealing hole 40 made in an isolator 42 for closing the chamber 10. The interior of the breaking chamber 10 communicates with the expansion volume of the casing of the circuit breaker through a channel d exhaust 43 delimited by the hollow sleeve 30, so as to generate a gas flow in the event of an increase in pressure caused by the rotation of the arc.

A l'intérieur de la bobine 16 se trouve un organe de refroidissement, désigné par le repère général 44, et destiné à refroidir les gaz chauds se trouvant au voisinage du contact d'arc fixe 12. L'organe de refroidissement 44 de préférence métallique, est conformé en radiateur 46 accolé en contact thermique avec la paroi cylindrique interne du manchon 26, et prenant appui sur le contact d'arc fixe 12. Le radiateur 46 est avantageusement équipé d'ailettes 48 annulaires pour optimiser la surface d'échange thermique avec le milieu gazeux environnant.Inside the coil 16 is a cooling member, designated by the general reference 44, and intended to cool the hot gases located in the vicinity of the fixed arcing contact 12. The cooling member 44 preferably metallic , is shaped as a radiator 46 joined in thermal contact with the internal cylindrical wall of the sleeve 26, and bearing on the fixed arcing contact 12. The radiator 46 is advantageously equipped with annular fins 48 to optimize the heat exchange surface with the surrounding gaseous medium.

La présence du radiateur 46 à l'intérieur de la bobine 16 limite toute stagnation de gaz chauds près du contact d'arc fixe 16, c'est à dire dans la première partie de la zone de formation d'arc qui n'est pas parcourue par l'écoulement gazeux. L'arc est éteint normalement par l'écoulement gazeux s'établissant à travers le manchon 30 tubulaire de support du contact d'arc mobile 28, constituant la deuxième partie de la zone de formation d'arc.The presence of the radiator 46 inside the coil 16 limits any stagnation of hot gases near the fixed arcing contact 16, that is to say in the first part of the arcing zone which is not traversed by the gas flow. The arc is normally extinguished by the gas flow establishing itself through the tubular sleeve 30 for supporting the movable arcing contact 28, constituting the second part of the arcing zone.

Le refroidissement efficace des gaz chauds au voisinage du contact d'arc fixe 12 contribue à améliorer l'extinction de l'arc et à obtenir une excellente tenue diélectrique, en évitant toute possibilité de reclaquage au passage à zéro du courant.The effective cooling of the hot gases in the vicinity of the fixed arcing contact 12 contributes to improving the extinction of the arcing and to obtaining an excellent dielectric strength, avoiding any possibility of reclapling on the passage of the current to zero.

Un tel agencement du radiateur 46 est particulièrement efficace pour la coupure de courants de faibles intensités.Such an arrangement of the radiator 46 is particularly effective for breaking low-intensity currents.

L'écoulement gazeux à travers le contact d'arc mobile 28 tubulaire peut être amélioré en incorporant une tuyère avec convergent/divergent à l'intérieur du manchon 30.The gas flow through the tubular movable arcing contact 28 can be improved by incorporating a nozzle with convergent / divergent inside the sleeve 30.

Le radiateur de l'organe de refroidissement 44 à l'intérieur de la bobine 16 peut bien entendu se présenter sous diverses formes de réalisations.The radiator of the cooling member 44 inside the coil 16 can of course be in various embodiments.

Claims (4)

Disjoncteur à autoexpansion et à arc tournant logé à l'intérieur d'une enveloppe étanche remplie de gaz isolant à rigidité diélectrique élevée, notamment de l'hexafluorure de soufre, ladite enveloppe renfermant une chambre de coupure (10) comportant : - un contact d'arc fixe (12) annulaire associé à une bobine (16) électromagnétique de mise en rotation de l'arc, ladite bobine cylindrique étant agencée coaxialement autour du contact d'arc fixe (12), - un contact d'arc mobile (28) creux coopérant avec le contact d'arc fixe (12) de manière à occuper une position de fermeture, et une position d'ouverture, - et un canal (43) d'échappement disposé entre le contact d'arc mobile (28) creux, et l'enveloppe du disjoncteur, caractérisé en ce que la chambre de coupure (10) renferme de plus un organe de refroidissement (44) agencé à l'intérieur de la bobine (16) pour refroidir les gaz chauds au voisinage du contact d'arc fixe (12), ledit organe de refroidissement étant formé par un radiateur (46) métallique assujetti au contact d'arc fixe (12).Self-expanding and rotating arc circuit breaker housed inside a sealed envelope filled with insulating gas with high dielectric strength, in particular sulfur hexafluoride, said envelope containing a breaking chamber (10) comprising: - an annular fixed arcing contact (12) associated with an electromagnetic coil (16) for rotating the arc, said cylindrical coil being arranged coaxially around the fixed arcing contact (12), a hollow movable arcing contact (28) cooperating with the fixed arcing contact (12) so as to occupy a closed position and an open position, - and an exhaust channel (43) arranged between the hollow movable arcing contact (28) and the casing of the circuit breaker, characterized in that the interrupting chamber (10) further contains a cooling member (44) arranged inside the coil (16) for cooling the hot gases in the vicinity of the fixed arcing contact (12), said the cooling member being formed by a metal radiator (46) secured to the fixed arcing contact (12). Disjoncteur à autoexpansion selon la revendication 1, caractérisé en ce que le radiateur (46) est accolé à la paroi interne d'un manchon (26) tubulaire séparé de la bobine (16) par un revêtement (24) isolant, ledit manchon (22) étant réalisé en matériau magnétique pour renforcer le champ magnétique dans la zone de formation de l'arc.Self-expanding circuit breaker according to claim 1, characterized in that the radiator (46) is attached to the internal wall of a tubular sleeve (26) separated from the coil (16) by an insulating coating (24), said sleeve (22 ) being made of magnetic material to strengthen the magnetic field in the arc formation zone. Disjoncteur à autoexpansion selon la revendication 1 ou 2, caractérisé en ce que le radiateur (46) est équipé d'une pluralité d'ailettes (48) pour optimiser la surface d'échange thermique avec le milieu gazeux environnant.Self-expanding circuit breaker according to claim 1 or 2, characterized in that the radiator (46) is equipped with a plurality of fins (48) to optimize the heat exchange surface with the surrounding gaseous medium. Disjoncteur à autoexpansion selon la revendication 1 ou 2, caractérisé en ce que le contact d'arc fixe (12) est formé par une piste annulaire située sur le bord interne de la face frontale (14) de la bobine (16), et que le contact d'arc mobile (28) est sollicité par un ressort (32) en aboutement contre le contact d'arc fixe (12).Self-expanding circuit breaker according to claim 1 or 2, characterized in that the fixed arcing contact (12) is formed by an annular track located on the internal edge of the front face (14) of the coil (16), and that the movable arcing contact (28) is biased by a spring (32) abutting against the fixed arcing contact (12).
EP19960103750 1995-03-22 1996-03-10 Self-blast circuit breaker with rotating arc Expired - Lifetime EP0734035B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503569A FR2732157B1 (en) 1995-03-22 1995-03-22 GAS CIRCUIT BREAKER HAVING A SELF-EXPANSION AND ROTATING ARC CHAMBER
FR9503569 1995-03-22

Publications (2)

Publication Number Publication Date
EP0734035A1 true EP0734035A1 (en) 1996-09-25
EP0734035B1 EP0734035B1 (en) 2001-08-29

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ID=9477450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960103750 Expired - Lifetime EP0734035B1 (en) 1995-03-22 1996-03-10 Self-blast circuit breaker with rotating arc

Country Status (5)

Country Link
EP (1) EP0734035B1 (en)
CN (1) CN1068962C (en)
DE (1) DE69614738T2 (en)
ES (1) ES2161933T3 (en)
FR (1) FR2732157B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932177A1 (en) * 1998-01-27 1999-07-28 Schneider Electric Sa Arc chamber for an autoexpansion circuit breaker, and internal casing of thermoplastic resin

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221576B4 (en) * 2002-05-08 2006-06-01 Siemens Ag Electrical switching device with a cooling device
EP1675145A1 (en) * 2004-12-23 2006-06-28 ABB Technology AG High power circuit breaker with sealing against hot arcing gasses
EP1829077B2 (en) * 2004-12-24 2011-03-23 ABB Technology AG Generator switch having an improved switching capacity
CN102543553A (en) * 2011-12-09 2012-07-04 沈阳工业大学 SF6 circuit-breaker gyromagnetic air compression type arc extinguishing chamber structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906236C (en) * 1943-08-10 1954-03-11 Voigt & Haeffner Ag High voltage switch
EP0064425A2 (en) * 1981-04-20 1982-11-10 Merlin Gerin Interrupter with rotating arc in an insulating gas
EP0240397A1 (en) * 1986-03-28 1987-10-07 Merlin Gerin Self-blast electrical circuit breaker with a rotating arc

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2055987U (en) * 1989-01-03 1990-04-11 航空航天工业部国营燎原机械厂 Indoor high-pressure vacumm circuit breaker
FR2977170B1 (en) * 2011-06-29 2013-08-09 Cie Engrenages Et Reducteurs Messian Durand DRIVE DEVICE FOR MILLING MACHINE AND CORRESPONDING MILL

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906236C (en) * 1943-08-10 1954-03-11 Voigt & Haeffner Ag High voltage switch
EP0064425A2 (en) * 1981-04-20 1982-11-10 Merlin Gerin Interrupter with rotating arc in an insulating gas
EP0240397A1 (en) * 1986-03-28 1987-10-07 Merlin Gerin Self-blast electrical circuit breaker with a rotating arc

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932177A1 (en) * 1998-01-27 1999-07-28 Schneider Electric Sa Arc chamber for an autoexpansion circuit breaker, and internal casing of thermoplastic resin
FR2774213A1 (en) * 1998-01-27 1999-07-30 Schneider Electric Ind Sa CUTTING CHAMBER OF A SELF-EXPANDING CIRCUIT BREAKER AND A THERMOPLASTIC RESIN ENCLOSURE
AU738593B2 (en) * 1998-01-27 2001-09-20 Schneider Electric Sa An extinguishing chamber of a circuit breaker with self-extinguishing expansion, and a thermoplastic resin enclosure

Also Published As

Publication number Publication date
CN1138207A (en) 1996-12-18
FR2732157A1 (en) 1996-09-27
EP0734035B1 (en) 2001-08-29
CN1068962C (en) 2001-07-25
DE69614738D1 (en) 2001-10-04
ES2161933T3 (en) 2001-12-16
FR2732157B1 (en) 1997-05-09
DE69614738T2 (en) 2002-07-04

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