EP0037295A1 - High-speed circuit breaker provided with a shock-proof device - Google Patents

High-speed circuit breaker provided with a shock-proof device Download PDF

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Publication number
EP0037295A1
EP0037295A1 EP81400337A EP81400337A EP0037295A1 EP 0037295 A1 EP0037295 A1 EP 0037295A1 EP 81400337 A EP81400337 A EP 81400337A EP 81400337 A EP81400337 A EP 81400337A EP 0037295 A1 EP0037295 A1 EP 0037295A1
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EP
European Patent Office
Prior art keywords
disc
unlocking
coil
front face
unlatch
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
EP81400337A
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German (de)
French (fr)
Other versions
EP0037295B1 (en
Inventor
Dominique Ferrucci
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.)
Merlin Gerin SA
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Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0037295A1 publication Critical patent/EP0037295A1/en
Application granted granted Critical
Publication of EP0037295B1 publication Critical patent/EP0037295B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1054—Means for avoiding unauthorised release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/088—Electromagnets; Actuators including electromagnets with armatures provided with means for absorbing shocks

Definitions

  • the invention relates to a rapid switch comprising a device for controlling the opening of the contacts by a Thomson effect propellant member requiring rapid movement of the moving element in the opening direction and a device for locking the moving element in opening position, provided with an unlocking control having a unlocking conductive disc disposed in the rest position facing and at a small distance from the front face of an unlocking coil so as to be repelled during the supply of said unlocking coil, in unlocking position.
  • a known switch or circuit breaker of the kind mentioned (French patent 2,377,087) allows a limitation of the short-circuit currents by rapid opening of the contacts and maintenance in the open position by a locking device controlled by Thomson effect opposing action of a closing spring.
  • the sudden commands essential for rapid movement generate vibrations and shocks which can be the cause of untimely maneuvers, for example unlocking.
  • the shock caused by the rapid opening of the contacts can be transmitted via the unlocking coil to the unlocking disc, which, coming into the unlocking position, prevents the locking of the moving element, which returns to the closed position. .
  • the object of the present invention is to remedy this drawback and to allow the production of a fast switch with reliable operation.
  • the switch according to the invention is characterized in that it further comprises an anti-shock device comprising a return spring cooperating with the unlocking disc and whose action of E ' recalling the unlocking disc rusting in the rest position is limited by a stop arranged so as to leave a slight clearance between the front face of the coil and the disc facing.
  • an anti-shock device comprising a return spring cooperating with the unlocking disc and whose action of E ' recalling the unlocking disc rusting in the rest position is limited by a stop arranged so as to leave a slight clearance between the front face of the coil and the disc facing.
  • the return spring of the conductive disc in the rest position preferably acts on the head of a pin bearing on the front face of the coil.
  • the length or height of the pin is slightly greater than that of the disc to define the clearance between the disc and the coil with great precision.
  • a spring with a force noticeably weaker than that of the return spring urges the disc away from the coil.
  • the pin transmits a shock directly to the high-intensity return spring, which contributes to the absorption of the shock.
  • a plurality of pins and return springs can of course be distributed circumferentially on the disc, the pins passing through holes made in this disc.
  • the anti-shock device comprises pins 28 each having a stud 32 passing through an orifice formed in the disc 24 and a head 30 held in abutment of the disc 24 by a return spring 34.
  • the length of the stud 32 is slightly greater than the thickness of the disc 24, so that the end of the stud 32 protrudes from the underside of the disc 24 and comes into abutment from the front face of the coil 26, leaving a small gap 36 between the disc 24 and the coil 26.
  • a spring spacing 38 is interposed between the coil 26 and the disc 24, so as to urge the latter upwards in the figure by pressing the heads 30 of the pins 28.
  • the force of the springs return 34 is transmitted by the pins 28, in support of the front face of the coil 26, directly to the latter.
  • the room mobile, constituted by the striker 22 and the disc 24, is urged upwards by the spacer spring 38, the force of which is significantly less than that of the return springs 34.
  • the thickness of the gap 36 can be extremely weak, for example a few tenths of a millimeter, this gap 36 nevertheless avoiding any mechanical contact between the parts 26 and 24. It is clear that two or more pins 28 can be distributed circumferentially from the disc 24 and that the pins 32 can be in contact of the metal frame of the coil 26.
  • the shockproof device is particularly simple and does not affect the operation of the switch in any way. It is clear that the head 30 of the pin 28 constitutes a movable stop which frames with the fixed stop, constituted by the coil 26, the conductive disc 24 at low clearance, the movement of the pin 28 in the direction of the coil 26 being limited by the stud 32.
  • the unidirectional limitation of the movement of the movable stop 30 can obviously be carried out in any other operating manner.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)
  • Electromagnets (AREA)

Abstract

1. High-speed circuit-breaker comprising a contact (10) opening operating device having a Thomson effect driving member (14, 16) for quickly moving the movable part in opening direction and a latch device (20) of the movable part in open position, having an unlatch actuating device (24, 26) with a conductive unlatch disc (24) disposed in the rest position in face and at small distance from the front face of an unlatch winding (26) so that the disc is repulsed into the unlatch position when the unlatch winding is powered, characterized in that it further comprises a shock-proof device (32, 34, 38) comprising a draw-back spring (34) cooperating with an unlatch disc (24), the drawback action therefrom on the unlatch disc in the rest position being limited by an abutment (30) so disposed as to provide a small clearance (36) between the front face of the winding (26) and the opposite disc (24).

Description

L'invention est relative à un interrupteur rapide comprenant un dispositif de commande d'ouverture des contacts par organe propulseur à effet Thomson imposant un déplacement rapide de l'équipage mobile en direction d'ouverture et un dispositif de verrouillage de l'équipage mobile en posi-tion d'ouverture, doté d'une commande de déverrouillage ayant un disque conducteur de déverrouillage disposé en position de repos en regard et à faible écartement de la face frontale d'une bobine de déverrouillage de façon à être répulsé lors de l'alimentation de ladite bobine de déverrouillage, en position de déverrouillage.The invention relates to a rapid switch comprising a device for controlling the opening of the contacts by a Thomson effect propellant member requiring rapid movement of the moving element in the opening direction and a device for locking the moving element in opening position, provided with an unlocking control having a unlocking conductive disc disposed in the rest position facing and at a small distance from the front face of an unlocking coil so as to be repelled during the supply of said unlocking coil, in unlocking position.

Un interrupteur ou disjoncteur connu du genre mentionné (brevet français 2.377.087) permet une limitation des courants de court-circuit par ouverture rapide des contacts et un maintien en position ouvert par un dispositif de verrouillage à commande par effet Thomson s'opposant à l'action d'un ressort de fermeture. Les commandes brusques indispensables aux déplacements rapides engendrent des vibrations et des chocs pouvant être à l'origine de manoeuvres intempestives par exemple de déverrouillage. Le choc provoqué par l'ouverture rapide des contacts peut être transmis par l'intermédiaire de la bobine de déverrouillage au disque de déverrouillage, qui, venant en position de déverrouillage, empêche le verrouillage de l'équipage mobile, qui revient en position de fermeture. Ces défaillances peuvent avoir de graves conséquences.A known switch or circuit breaker of the kind mentioned (French patent 2,377,087) allows a limitation of the short-circuit currents by rapid opening of the contacts and maintenance in the open position by a locking device controlled by Thomson effect opposing action of a closing spring. The sudden commands essential for rapid movement generate vibrations and shocks which can be the cause of untimely maneuvers, for example unlocking. The shock caused by the rapid opening of the contacts can be transmitted via the unlocking coil to the unlocking disc, which, coming into the unlocking position, prevents the locking of the moving element, which returns to the closed position. . These failures can have serious consequences.

La présente invention a pour but de remédier à cet inconvénient et de permettre la réalisation d'un interrupteur rapide à fonctionnement fiable.The object of the present invention is to remedy this drawback and to allow the production of a fast switch with reliable operation.

L'interrupteur selon l'invention est caractérisé en ce qu'il comporte de plus un dispositif antichoc comportant un ressort de rappel coopérant avec le disque de déverrouillage et dont l'action dE' rappel du disque de déverrouillage en position de repos est limitée par une butée disposée de façon à laisser subsister un faible jeu entre la face frontale de la bobine et le disque en regard.The switch according to the invention is characterized in that it further comprises an anti-shock device comprising a return spring cooperating with the unlocking disc and whose action of E ' recalling the unlocking disc rusting in the rest position is limited by a stop arranged so as to leave a slight clearance between the front face of the coil and the disc facing.

On a constaté que le jeu ménagé entre le disque et la face frontale de la bobine n'affecte pratiquement pas l'effet Thomson de répulsion du disque lors d'une décharge électrique à travers la bobine. Ce faible jeu s'oppose par contre à la transmission d'un choc au disque en direction de déverrouillage et supprime tout risque de déverrouillage intempestif.It has been found that the clearance created between the disc and the front face of the coil practically does not affect the Thomson effect of repulsion of the disc during an electric discharge through the coil. This slight play on the other hand is opposed to the transmission of a shock to the disc in the unlocking direction and eliminates any risk of untimely unlocking.

Le ressort de rappel du disque conducteur en position de repos agit de préférence sur la tête d'un pion venant en appui sur la face frontale de la bobine. La longueur ou hauteur du pion est légèrement supérieure à celle du disque pour définir le jeu entre le disque et la bobine avec une grande précision. Un ressort d'écartement de force notablement plus faible que celle du ressort de rappel sollicite le disque à l'écart de la bobine. Le pion transmet un choc directement au ressort de rappel de forte intensité, qui contribue à l'amortissement du choc. Une pluralité de pions et de ressorts de rappel peuvent bien entendu être répartis circonférentiellement sur le disque, les pions traversant des trous ménagés dans ce disque.The return spring of the conductive disc in the rest position preferably acts on the head of a pin bearing on the front face of the coil. The length or height of the pin is slightly greater than that of the disc to define the clearance between the disc and the coil with great precision. A spring with a force noticeably weaker than that of the return spring urges the disc away from the coil. The pin transmits a shock directly to the high-intensity return spring, which contributes to the absorption of the shock. A plurality of pins and return springs can of course be distributed circumferentially on the disc, the pins passing through holes made in this disc.

D'autres avantages et caractéristiques de l'invention ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre, donné à titre d'exemple non limitatif et représenté sur la figure unique, qui est une vue schématique en coupe axiale d'un disjoncteur rapide équipé d'un dispositif antichoc selon l'invention.Other advantages and characteristics of the invention will emerge more clearly from the description which follows of an embodiment, given by way of nonlimiting example and represented in the single figure, which is a schematic sectional view. axial view of a fast circuit breaker fitted with an anti-shock device according to the invention.

Sur la figure, qui correspond partiellement à la figure du brevet français précité 2.377.087, on reconnaît le contact mobile 10 d'un pôle 12 d'un interrupteur électrique susceptible d'être déplacé en position d'ouverture par une commande à effet Thomson comprenant un disque conducteur 14 dispose en position de fermeture des contacts en regard d'une bobine de commande 16. Le disque 14 est solidaire d'une tige de commande 18, dont l'une des extrémités vient frapper le contact mobile 10 et dont l'extrémité opposée coopère avec un dispositif de verrouillage à rouleaux de coincement 20. Les rouleaux 20 sont susceptibles d'être déplacés en position de déverrouillage par un percuteur 22 porté par un disque conducteur 24 disposé en position de repos en regard de la face frontale d'une bobine 26.In the figure, which partially corresponds to the figure of the aforementioned French patent 2,377,087, one recognizes the movable contact 10 of a pole 12 of an electric switch capable of being moved to the open position by a Thomson effect control comprising a conductive disc 14 has in the closed position of the contacts facing a control coil 16. The disc 14 is integral with a control rod 18, one of whose ends strikes the movable contact 10 and whose opposite end cooperates with a locking device with wedging rollers 20. The rollers 20 can be moved into the unlocked position by a striker 22 carried by a conductive disc 24 disposed in the rest position facing the front face of a coil 26.

On se reportera avantageusement au brevet précité pour comprendre le fonctionnement de cet interrupteur et il suffit de rappeler que la commande d'ouverture par une décharge d'une capacité dans la bobine 16 s'effectue extrêmement rapidement par effet Thomson de répulsion du disque conducteur 14 et que le contact 10 est maintenu en position ouvert par le dispositif de verrouillage à rouleaux 20. La fermeture de l'interrupteur est commandée par une alimentation de la bobine 26 provoquant une répulsion du disque 24 et un déplacement des rouleaux 20 en position de déverrouillage de la tige 18, autorisant une fermeture des contacts sous l'action d'un ressort de fermeture.Advantageously refer to the aforementioned patent to understand the operation of this switch and it suffices to recall that the opening command by a discharge of a capacity in the coil 16 is carried out extremely quickly by Thomson effect of repulsion of the conductive disc 14 and that the contact 10 is maintained in the open position by the roller locking device 20. The closing of the switch is controlled by a supply of the coil 26 causing a repulsion of the disc 24 and a displacement of the rollers 20 in the unlocked position of the rod 18, authorizing a closing of the contacts under the action of a closing spring.

Le dispositif antichoc comporte des pions 28 ayant chacun un téton 32 traversant un orifice ménagé dans le disque 24 et une tête 30 maintenue en appui du disque 24 par un ressort de rappel 34. La longueur du téton 32 est légèrement supérieure à l'épaisseur du disque 24, de manière que l'extrémité du téton 32 fasse saillie de la face inférieure du disque 24 et vienne en butée de la face frontale de la bobine 26 en ménageant un faible interstice 36 entre le disque 24 et la bobine 26. Un ressort d'écartement 38 est intercalé entre la bobine 26 et le disque 24, de manière à solliciter ce dernier vers le haut sur la figure en appui des têtes 30 des pions 28. En position de repos, représentée sur la figure, la force des ressorts de rappel 34 est transmise par les pions 28, en appui de la face frontale de la bobine 26, directement à cette dernière. La pièce mobile, constituée par le percuteur 22 et le disque 24, est sollicitée vers le haut par le ressort d'écartement 38, dont la force est notablement inférieure à celle des ressorts de rappel 34. L'épaisseur de l'interstice 36 peut être extrêment faible, par exemple de quelques dizièmes de millimètre, cet interstice 36 évitant néanmoins tout contact mécanique entre les pièces 26 et 24. Il est clair que deux ou plusieurs pions 28 peuvent être répartis circonférentiellement du disque 24 et que les tétons 32 peuvent être au contact de la carcasse métallique de la bobine 26.The anti-shock device comprises pins 28 each having a stud 32 passing through an orifice formed in the disc 24 and a head 30 held in abutment of the disc 24 by a return spring 34. The length of the stud 32 is slightly greater than the thickness of the disc 24, so that the end of the stud 32 protrudes from the underside of the disc 24 and comes into abutment from the front face of the coil 26, leaving a small gap 36 between the disc 24 and the coil 26. A spring spacing 38 is interposed between the coil 26 and the disc 24, so as to urge the latter upwards in the figure by pressing the heads 30 of the pins 28. In the rest position, shown in the figure, the force of the springs return 34 is transmitted by the pins 28, in support of the front face of the coil 26, directly to the latter. The room mobile, constituted by the striker 22 and the disc 24, is urged upwards by the spacer spring 38, the force of which is significantly less than that of the return springs 34. The thickness of the gap 36 can be extremely weak, for example a few tenths of a millimeter, this gap 36 nevertheless avoiding any mechanical contact between the parts 26 and 24. It is clear that two or more pins 28 can be distributed circumferentially from the disc 24 and that the pins 32 can be in contact of the metal frame of the coil 26.

L'interrupteur selon l'invention fonctionne de la manière suivante :

  • L'appareil étant en position fermé, représentée sur la figure, un choc subi par le pôle 12, notamment par l'ouverture brusque par effet Thomson, est transmis par la bobine 26 aux pions 28 et aux ressorts de rappel 34. Le disque 24 n'étant pas au contact de la bobine 26 ne subit aucun choc tendant à le déplacer vers la position de déverrouillage et le verrouillage de l'équipage mobile par les rouleaux 20 en position d'ouverture du pôle, s'effectue normalement. Il convient de remarquer que le ressort d'écartement 38 est incapable de transmettre un effet de choc notable ce qui ne serait pas le cas si la force de ce ressort d'écartement 38 était du même ordre de grandeur que celle des ressorts de rappel 34. Le déverrouillage s'effectue normalement par alimentation de la bobine 26, le disque 24 étant répulsé à l'encontre des ressorts de rappel 34, lesquels, agissant sur les têtes 30 des pions 28, rappellent le disque conducteur 24 en position de repos dès la fin de manoeuvre de déverrouillage.
The switch according to the invention operates as follows:
  • The device being in the closed position, represented in the figure, a shock undergone by the pole 12, in particular by the sudden opening by Thomson effect, is transmitted by the coil 26 to the pins 28 and to the return springs 34. The disc 24 not being in contact with the coil 26 does not undergo any shock tending to move it towards the unlocking position and the locking of the moving element by the rollers 20 in the pole opening position, is carried out normally. It should be noted that the spacer spring 38 is incapable of transmitting a significant shock effect which would not be the case if the force of this spacer spring 38 was of the same order of magnitude as that of the return springs 34 Unlocking is normally carried out by supplying the coil 26, the disc 24 being repelled against the return springs 34, which, acting on the heads 30 of the pins 28, recall the conductive disc 24 in the rest position from the end of the unlocking maneuver.

Le dispositif antichoc est particulièrement simple et n'affecte en aucune manière le fonctionnement de l'interrupteur. Il est clair que la tête 30 du pion 28 constitue une butée mobile qui encadre avec la butée fixe, constituée par la bobine 26, le disque conducteur 24 à faible jeu, le déplacement du pion 28 en direction de la bobine 26 étant limité par le téton 32. La limitation unidirectionnelle du déplacement de la butée mobile 30 peut évidemment être effectuée de toute autre manière opérante.The shockproof device is particularly simple and does not affect the operation of the switch in any way. It is clear that the head 30 of the pin 28 constitutes a movable stop which frames with the fixed stop, constituted by the coil 26, the conductive disc 24 at low clearance, the movement of the pin 28 in the direction of the coil 26 being limited by the stud 32. The unidirectional limitation of the movement of the movable stop 30 can obviously be carried out in any other operating manner.

Claims (4)

1. Interrupteur rapide comprenant un dispositif de commande d'ouverture des contacts (10) par un organe propulseur (14, 16) à effet Thomson imposant un déplacement rapide de l'équipage mobile en direction d'ouverture et un dispositif de verrouillage (20) de l'équipage mobile en position d'ouverture, doté d'une commande de déverrouillage (24, 26) ayant un disque conducteur (24) de déverrouillage disposé en position de repos en regard et à faible écartement de la face frontale d'une bobine (26) de déverrouillage de façon à être répulsé, lors de l'alimentation de ladite bobine de déverrouillage, en position de déverrouillage, caractérisé en ce qu'il comporte de plus un dispositif antichoc (32, 34, 38) comportant un ressort de rappel (34) coopérant avec le disque de déverrouillage (24) et dont l'action de rappel du disque de déverrouillage en position de repos est limitée par une butée (30) disposée de façon à laisser subsister un faible jeu (36) entre la face frontale de la bobine (26) et le disque (24) en regard.1. Quick switch comprising a device for controlling the opening of the contacts (10) by a propellant member (14, 16) with a Thomson effect requiring rapid movement of the moving assembly in the opening direction and a locking device (20 ) of the moving element in the open position, provided with an unlocking control (24, 26) having a conductive unlocking disc (24) disposed in the rest position facing and at a small distance from the front face of an unlocking coil (26) so as to be repelled, during the supply of said unlocking coil, in the unlocking position, characterized in that it further comprises an anti-shock device (32, 34, 38) comprising a return spring (34) cooperating with the unlocking disc (24) and whose return action of the unlocking disc in the rest position is limited by a stop (30) arranged so as to leave a slight clearance (36) between the front face of the coil (26) and the disc (24) opposite. 2. Interrupteur-selon 1, caractérisé en ce que dans la position de repos le disque de déverrouillage (24) est encadré à faible jeu par ladite butée (30) montée mobile uni- directionnellement et la face frontale de la bobine (26) formant une butée fixe, un ressort d'écartement (38) sollicitant le disque (24) en appui de ladite butée mobile (30) à l'écart de la face frontale de la bobine (26).2. Switch-according to 1, characterized in that in the rest position the unlocking disc (24) is framed with little play by said stop (30) mounted movable unidirectionally and the front face of the coil (26) forming a fixed stop, a spacer spring (38) urging the disc (24) to bear on said movable stop (30) away from the front face of the coil (26). 3. Interrupteur selon 2, caractérisé en ce que ladite butée mobile (30) est constituée par la tête (30) d'un pion (28) d'une hauteur légèrement supérieure à celle du disque (24) et dont l'extrémité est sollicitée en appui de la face frontale de la bobine (26) par le ressort de rappel (34) agissant sur ladite tête (-30).3. Switch according to 2, characterized in that said movable stop (30) consists of the head (30) of a pin (28) of a height slightly greater than that of the disc (24) and the end of which is biased in support of the front face of the coil (26) by the return spring (34) acting on said head (-30). 4. Interrupteur selon 2 ou 3, caractérisé en ce que la force du ressort de rappel (30) est notablement supérieure à celle du ressort d'écartement (38).4. Switch according to 2 or 3, characterized in that the force of the return spring (30) is significantly greater than that of the spacer spring (38).
EP19810400337 1980-03-31 1981-03-04 High-speed circuit breaker provided with a shock-proof device Expired EP0037295B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8007285A FR2479549A1 (en) 1980-03-31 1980-03-31 ANTI-SHOCK DEVICE, IN PARTICULAR FOR AN ELECTRICAL EQUIPMENT
FR8007285 1980-03-31

Publications (2)

Publication Number Publication Date
EP0037295A1 true EP0037295A1 (en) 1981-10-07
EP0037295B1 EP0037295B1 (en) 1984-02-15

Family

ID=9240387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400337 Expired EP0037295B1 (en) 1980-03-31 1981-03-04 High-speed circuit breaker provided with a shock-proof device

Country Status (4)

Country Link
EP (1) EP0037295B1 (en)
JP (1) JPS56152132A (en)
DE (1) DE3162200D1 (en)
FR (1) FR2479549A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104779092A (en) * 2015-04-01 2015-07-15 国家电网公司 Structure and method for weakening vibration of operating mechanism through radial nonlinear transmission of waves

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399517A (en) * 1944-08-22 1946-04-30 Gen Electric Shockproof electromagnet
FR2377087A1 (en) * 1977-01-07 1978-08-04 Merlin Gerin Rapid-acting circuit breaker of modular structure - operates using Thomson effect and has locking mechanism enclosed in flask

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821596A (en) * 1954-06-21 1958-01-28 Westinghouse Electric Corp Trip device for circuit breakers
FR2377086A1 (en) * 1977-01-07 1978-08-04 Merlin Gerin Current limiting switch with electrodynamic drive - has two part electric energy store, one part used for normal operation and both for short circuits

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399517A (en) * 1944-08-22 1946-04-30 Gen Electric Shockproof electromagnet
FR2377087A1 (en) * 1977-01-07 1978-08-04 Merlin Gerin Rapid-acting circuit breaker of modular structure - operates using Thomson effect and has locking mechanism enclosed in flask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104779092A (en) * 2015-04-01 2015-07-15 国家电网公司 Structure and method for weakening vibration of operating mechanism through radial nonlinear transmission of waves

Also Published As

Publication number Publication date
JPS56152132A (en) 1981-11-25
FR2479549A1 (en) 1981-10-02
EP0037295B1 (en) 1984-02-15
FR2479549B1 (en) 1982-07-16
JPS6347096B2 (en) 1988-09-20
DE3162200D1 (en) 1984-03-22

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