EP2565890B1 - Electrical switchgear with high making capacity - Google Patents

Electrical switchgear with high making capacity Download PDF

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Publication number
EP2565890B1
EP2565890B1 EP12360063.7A EP12360063A EP2565890B1 EP 2565890 B1 EP2565890 B1 EP 2565890B1 EP 12360063 A EP12360063 A EP 12360063A EP 2565890 B1 EP2565890 B1 EP 2565890B1
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EP
European Patent Office
Prior art keywords
contacts
moving
moving contact
pair
contact
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Active
Application number
EP12360063.7A
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German (de)
French (fr)
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EP2565890A1 (en
Inventor
Marc Serpinet
Yves Trichard
Arnaud Marchal
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Socomec SA
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Socomec SA
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Publication of EP2565890A1 publication Critical patent/EP2565890A1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02Details
    • H01H73/04Contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/40Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Definitions

  • the present invention relates to a high-power shut-off device provided with a control module associated with at least one cut-off module corresponding to a phase of an electrical network, this cut-off module comprising at least one associated mobile contact.
  • this cut-off module comprising at least one associated mobile contact.
  • at least one pair of fixed contacts said movable contact being coupled to an actuation mechanism controlled by said control module to be moved between at least one triggered position in which the movable contact is remote from the pair of fixed contacts and the electrical circuit is open, and an engaged position in which the movable contact bears against the pair of fixed contacts and the electrical circuit is closed.
  • an electrical apparatus has at least one pair of fixed contacts and a movable contact.
  • the electrical device comprises a mechanism for closing and opening the contacts, also called actuating mechanism, which consists of a so-called abrupt closure mechanism independent of the operator.
  • actuating mechanism which consists of a so-called abrupt closure mechanism independent of the operator.
  • the kinetic energy of the moving contact is transformed into deformation of the materials and a reversal of the speed having the effect of re-opening the moving contact, causing a rebound of the moving contact.
  • the reopening stroke will depend on the berthing speed, the nature of the materials, the pressing force holding the moving contact against the fixed contact. During this reopening, there arises an electric arc which, depending on its intensity, will cause a local melting of the materials of the contact areas.
  • the rebound may be single or consist of several consecutive rebounds, of damped amplitude, until the kinetic energy of the moving contact has dissipated.
  • the electrical contact is established on a melt which, with time will solidify.
  • the risk of welding of the moving contact on the fixed contact is latent. In any case, it follows erosion of the contact areas which, if repeated, can become damaging to the normal operation of the electrical appliance.
  • the docking zone may correspond to the entry chamfer as in the publications FR 2,524,195 , FR 2,638,017 and EP 1 026 710 .
  • the closing power of the sliding contacts on short-circuit currents is limited to the power of the actuating mechanism which must oppose the Laplace forces.
  • the closure of the contacts by sliding is under power, which inevitably causes erosion of the permanent contact areas, limiting the endurance of the device.
  • a solution used in the case of pressure contacts is to equip the contact areas pellets, rivets or the like made of different materials, one of them is generally refractory to limit the risk of welding, or to provide a relief playing the role of spark arrester as in the publication EP 1 085 610 .
  • the implementation of these achievements is relatively expensive.
  • the publication WO 2006/137687 A1 proposes a switching device provided with a separate moving phase contact and a moving contact of neutral, having different lengths to generate different strokes so as to shift in time the docking of said movable contacts.
  • the time offset obtained is greater than 0.1s to allow time for the relays to analyze the current in order to detect a possible malfunction.
  • this arrangement does not solve the problem.
  • the present invention aims to overcome these drawbacks by proposing an electrical switching device provided with pressure contacts with high closing power even on short-circuit currents, in which the risks of welding and / or erosion at the zones permanent contact are considerably reduced or even eliminated, to achieve a high number of cycles and this without altering the quality of the electrical contact.
  • the invention relates to an electric switchgear according to claim 1.
  • This particular construction makes it possible in particular to differentiate the spark arrester zone from the permanent contact zones and to minimize the presence of the electric arc at closing by desynchronizing the rebounds by the creation of temporal docking delays of the order of 100 ⁇ s. between two mobile contacts that succeed one another in the same set.
  • the number of moving contacts can be determined according to the rating of said switchgear so that the moving contact current density does not exceed an intensity value of 15kA peak current.
  • said assembly may comprise two central movable contacts.
  • the movable contacts are advantageously arranged symmetrically with respect to a median axis passing through the center of said assembly, and the lateral movable contacts offset two by two with respect to said central movable contact to form stages.
  • the central movable contact comprises a central boss which, when said breaking module is in the engaged position, extends in the free space between the fixed contacts of said pair.
  • the central mobile contact may be associated with an insulating screen that replaces or adds to said boss.
  • Each set of multiple moving contacts may be carried by an electrically insulating carriage coupled to said actuating mechanism.
  • This carriage advantageously comprises a housing for each movable contact, in which each movable contact is biased towards said pair of fixed contacts by a return member.
  • These housings preferably have different depths to position said moving contacts of the same set in stages.
  • the electrical switching device 1 referred to in the invention usually consists of a control module 2 associated with one or more cutoff modules 3 each corresponding to a phase of an electrical network.
  • the device 1 comprises three cut-off modules 3.
  • Each cut-off module 3 comprises in known manner an insulating housing 30 inside which are housed at least two fixed contacts 4, forming a pair, extended to outside said housing by connection terminals 40, and at least one contact mobile 5 coupled to an actuating mechanism 6 controlled by the control module 2 to be moved between at least one triggered position in which it is remote from the fixed contacts and the electrical circuit is open, and an engaged position in which it is in support against the fixed contacts and the electrical circuit is closed.
  • the control module 2 can be operated manually by a handle 20 and / or automatically by a motor (not shown).
  • the cut-off device 1 comprises in the example shown fractionating chambers 7 arranged above the fixed contacts 4 and the movable contact 5 to capture, stretch, cool and then extinguish the electric arc generated by the current at each change of state of said apparatus.
  • This switching device 1 must be able to establish and cut currents 1 called normal or fault of a value of 0 to 10In, In being the value of the nominal current that can pass through the device permanently. This device must also be able to establish, and if necessary cut, short-circuit currents whose value can reach 100 to 300 times the rated current In, without altering the permanent contact zones in order to guarantee a constant quality of electrical contact in the weather.
  • the fixed contacts 4 and the movable contact 5 are arranged to form an omega-shaped current loop, symmetrical with respect to a median axis A coinciding with the axis of displacement Fd of the moving contact 5, in which the so-called Laplace forces, also called compensation forces Fc, generated by the current flowing in the current loop.
  • the conductive parts forming the fixed contacts 4 are rigidly fixed to the housing 30, folded approximately S, arranged in opposition and separated by a free median space.
  • the conductive part forming the movable contact 5 has a width greater than the free space between the two fixed contacts 4 for, in the engaged position, to be pressed against the fixed contacts 4.
  • These conductive parts each offer a contact area C located in a plane inclined relative to the central axis A of an angle substantially equal to 45 °. This example is not limiting since the contact areas C can be included in a plane inclined with respect to the median axis A at an angle that can be between 0 ° and 90 ° in which the value 0 ° is excluded .
  • the switching device 1 is distinguished from the state of the art by its movable contact 5 which is in fact constituted by an assembly 5, 5 'of a plurality of movable contacts 5A-C, 5A-F, parallel and staggered for staggering in time the docking of the movable contacts on the fixed contacts 4 and not to exceed an intensity value of 10 to 15 kA peak current per moving contact.
  • the fixed contacts 4 are sized to provide a contact area C adapted to receive the plurality of movable contacts of the same set 5, 5 '.
  • the number of movable contacts per set 5, 5 ' can be determined according to the nominal current rating In.
  • Figures 3 and 4 illustrate two alternative embodiments of a set of movable contacts, including a first assembly 5 which has five movable contacts 5A-C and corresponds to a 250A rating with a peak value of 50 to 75 kA, and a second set 5 ' which has twelve movable contacts 5A-F and corresponds to a rating of 1600A with a peak value of 120 to 150 kA.
  • the assemblies 5, 5 ' are symmetrical with respect to the central axis A of the breaking device 1 and comprise one or two movable contact (s) central (s) 5A different (s) other 5B movable contacts -F lateral.
  • the central movable contact 5A is centered on the median axis A and in the whole of the figure 4 , the two central movable contacts 5A are symmetrical to the central axis A.
  • Each central movable contact 5A is larger and / or positioned in advance of the others to be the first to dock the fixed contacts 4 in order to establish the current, and the last to leave the fixed contacts 4 to turn off the power. It is he who undergoes the electric arc and therefore plays the role of spark arrester.
  • the central movable contact 5A consists of a conductive part in the form of a blade having in its upper part a central boss 50 conferring a substantially triangular shape symmetrical with respect to the median axis A.
  • the boss 50 extends in the free space between the fixed contacts 4 outside the current loop.
  • This boss 50 is connected to the contact areas C by a shoulder 51 forming a nose on which the electric arc generated by the current clings to the closing and opening of the electric circuit, thus rapidly releasing the contact areas C
  • This boss 50 then defines a slope 52 which rises in the direction of the compensating forces Fc and accompanies the displacement of the electric arc pushed by these compensating forces Fc towards the fractionating chambers 7.
  • the central movable contact 5A can be completed by an insulating screen (not shown) which extends in place of the boss 50 or adds to this boss 50 to facilitate the extinction of the electric arc especially in low current of the order of 0.1 In by example.
  • the other lateral movable contacts 5B-F consist of a conductive part in the form of a blade symmetrical with respect to the central axis A and provided laterally with two contact zones C. They may have identical dimensions or not. They are at least identical two by two symmetrically with respect to the median axis A.
  • the race from one floor to another may be equal or not.
  • This carriage 8 can be formed in one piece or in several assembled parts, these parts can be made for example by molding plastics.
  • the carriage 8 is coupled to the actuating mechanism 6.
  • the actuating mechanism 6 of the set 5, 5 'of movable contacts comprises a drive shaft 60 connected in rotation with the handle 20 by an angle gear (not visible) and / or controlled by a second member (not shown) fitted into the square bore 61.
  • a system for converting the rotational movement of the drive shaft 60 into a translation movement makes it possible to move a carriage 64 carrying the carriage 8 into the median axis A.
  • This motion transformation system comprises a pair of rods 62, 63 hinged, but any other equivalent means is conceivable.
  • the first link 62 is integral with the drive shaft 60 and rotatably coupled to the second link 63 by a first link B1.
  • the second connecting rod 63 is coupled in rotation with the carriage 64, and simultaneously with the carriage 8, by a second articulation B2.
  • the carriage 64 is guided in translation relative to the housing 30 by means of rails, ribs or any other equivalent means, in which the projecting ends of the axis forming the articulation B2 circulate.
  • a return member 65 is interposed between the carriage 64 and each movable contact 5A-C, 5A-F to exert a determined pressing force on each of the movable contacts when it is pressed against the fixed contacts 4. In the configuration illustrated, this pressure force is added to the compensation forces Fc generated by current I.
  • FIGS. 5A to 5C illustrate in three steps the docking of the set 5 of movable contacts 5A-5C of the figure 3 on the fixed contacts 4 of a breaking module 3 to close the electrical circuit.
  • the breaking module 3 On engagement of the breaking module 3, when the carriage 64 is moved in the direction Fd towards the fixed contacts 4 by the actuating mechanism 6, the docking of the fixed contacts 4 is effected by the central movable contact 5A. which is ahead of the others and undergoes the first rebound (cf. Fig. 5A ).
  • the second movable contacts 5B surrounding the central movable contact 5A close on the fixed contacts 4, short-circuiting the electric arc that arose during the rebound of the movable contact central 5A, and in turn undergo a rebound (cf.
  • the third movable contacts 5C that follow are closed in turn on the fixed contacts 4, short-circuiting the electric arc that arises during the rebounds of the second movable contacts 5B (cf. Fig. 5C ), and in turn undergo a rebound.
  • the central movable contact 5A which was the first to close, ends its rebound stroke, short-circuiting the electric arc that arises during rebounds of the third movable contacts 5C. And so on, until rebound stabilization.
  • the total duration of the presence of the electric arc as well as the specific duration of the presence of the electric arc at each docking are greatly reduced, making it possible to achieve a high number of closing cycles and increased endurance.
  • the lateral movable contacts 5B-C, 5B-F are totally arc-free, the electric arc being established only on the central mobile contact 5A when it leaves lastly the fixed contacts 4. Therefore, the lateral movable contacts 5B-C, 5B-F undergo no wear, erosion or local melting due to the electric arc, and participate fully in the permanent passage of the electric current.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Domaine technique :Technical area :

La présente invention concerne un appareil de coupure électrique à haut pouvoir de fermeture pourvu d'un module de commande associé à au moins un module de coupure correspondant à une phase d'un réseau électrique, ce module de coupure comportant au moins un contact mobile associé à au moins une paire de contacts fixes, ledit contact mobile étant couplé à un mécanisme d'actionnement commandé par ledit module de commande pour être déplacé entre au moins une position déclenchée dans laquelle le contact mobile est éloigné de la paire de contacts fixes et le circuit électrique est ouvert, et une position enclenchée dans laquelle le contact mobile est en appui contre la paire de contacts fixes et le circuit électrique est fermé.The present invention relates to a high-power shut-off device provided with a control module associated with at least one cut-off module corresponding to a phase of an electrical network, this cut-off module comprising at least one associated mobile contact. at least one pair of fixed contacts, said movable contact being coupled to an actuation mechanism controlled by said control module to be moved between at least one triggered position in which the movable contact is remote from the pair of fixed contacts and the electrical circuit is open, and an engaged position in which the movable contact bears against the pair of fixed contacts and the electrical circuit is closed.

Technique antérieure :Prior art:

Un exemple de ce type d'appareil de coupure électrique est décrit dans les publications FR 2 818 434 et FR 2 891 395 du même demandeur et concerne notamment des interrupteurs, des interrupteurs fusibles, des commutateurs, des commutateurs-inverseurs, des disjoncteurs, ou similaires.An example of this type of electric switchgear is described in the publications FR 2 818 434 and FR 2 891 395 of the same applicant and particularly concerns switches, fuse switches, switches, reversing switches, circuit breakers, or the like.

Pour établir un courant électrique, un appareil électrique possède au moins une paire de contacts fixes et un contact mobile. Lors de la fermeture du circuit électrique, le contact mobile est amené contre le contact fixe. Pour assurer la qualité du contact électrique, garante d'un bon fonctionnement de l'appareil, le mouvement du contact mobile dans sa course d'accostage doit être indépendant de toutes actions extérieures. Pour ce faire l'appareil électrique comporte un mécanisme de fermeture et d'ouverture des contacts, appelé aussi mécanisme d'actionnement, qui consiste en un mécanisme dit à fermeture brusque et indépendante de l'opérateur. Lors de la fermeture, ce mécanisme transmet au contact mobile une vitesse de déplacement de l'ordre de quelques m/s. Durant cette période, le contact mobile acquiert une certaine quantité d'énergie cinétique. Lors de l'entrée en contact du contact mobile sur le contact fixe, il s'ensuit un choc. L'énergie cinétique du contact mobile se transforme en déformation des matériaux et en une inversion de la vitesse ayant pour effet de ré-ouvrir le contact mobile, provoquant un rebond du contact mobile. La course de réouverture dépendra de la vitesse d'accostage, de la nature des matériaux, de l'effort presseur de maintien du contact mobile contre le contact fixe. Lors de cette réouverture, il se produit un arc électrique qui, suivant son intensité, va provoquer une fusion locale des matériaux des zones de contact. Suivant les conditions, le rebond peut être unique ou consister en plusieurs rebonds consécutifs, d'amplitude amortie, jusqu'à ce que l'énergie cinétique du contact mobile se soit dissipée. A la fin des rebonds, le contact électrique s'établit sur une partie en fusion qui, avec le temps va se solidifier. Le risque de soudure du contact mobile sur le contact fixe est latent. Dans tous les cas, il s'ensuit une érosion des zones de contact qui, si elle est répétée, peut devenir dommageable pour le fonctionnement normal de l'appareil électrique.To establish an electric current, an electrical apparatus has at least one pair of fixed contacts and a movable contact. When closing the electrical circuit, the movable contact is brought against the fixed contact. To ensure the quality of the electrical contact, ensuring proper operation of the device, the movement of the movable contact in its docking stroke must be independent of any external actions. To do this the electrical device comprises a mechanism for closing and opening the contacts, also called actuating mechanism, which consists of a so-called abrupt closure mechanism independent of the operator. When closing, this mechanism transmits to the moving contact a moving speed of the order of a few m / s. During this period, the moving contact acquires a certain amount of kinetic energy. When the moving contact comes into contact with the fixed contact, a shock ensues. The kinetic energy of the moving contact is transformed into deformation of the materials and a reversal of the speed having the effect of re-opening the moving contact, causing a rebound of the moving contact. The reopening stroke will depend on the berthing speed, the nature of the materials, the pressing force holding the moving contact against the fixed contact. During this reopening, there arises an electric arc which, depending on its intensity, will cause a local melting of the materials of the contact areas. Depending on the conditions, the rebound may be single or consist of several consecutive rebounds, of damped amplitude, until the kinetic energy of the moving contact has dissipated. At the end of rebounds, the electrical contact is established on a melt which, with time will solidify. The risk of welding of the moving contact on the fixed contact is latent. In any case, it follows erosion of the contact areas which, if repeated, can become damaging to the normal operation of the electrical appliance.

Une des solutions pour éviter ces risques de soudure est de différentier la zone d'accostage de la zone de contact permanent. Lorsque les contacts sont glissants, la zone d'accostage peut correspondre au chanfrein d'entrée comme dans les publications FR 2 524 195 , FR 2 638 017 et EP 1 026 710 . Le pouvoir de fermeture des contacts glissants sur des courants de court-circuit est limité à la puissance du mécanisme d'actionnement qui doit s'opposer aux forces de Laplace. De plus, la fermeture des contacts par glissement s'effectue sous courant, ce qui provoque inévitablement une érosion des zones de contact permanent, limitant l'endurance de l'appareil. Une solution utilisée dans le cas de contacts à pression est d'équiper les zones de contact de pastilles, rivets ou similaires réalisés dans des matériaux différents dont l'un d'eux est généralement réfractaire afin de limiter les risques de soudure, ou encore de prévoir un relief jouant le rôle de pare-étincelles comme dans la publication EP 1 085 610 . La mise en oeuvre de ces réalisations est relativement coûteuse.One of the solutions to avoid these risks of welding is to differentiate the docking zone from the permanent contact zone. When the contacts are slippery, the docking area may correspond to the entry chamfer as in the publications FR 2,524,195 , FR 2,638,017 and EP 1 026 710 . The closing power of the sliding contacts on short-circuit currents is limited to the power of the actuating mechanism which must oppose the Laplace forces. In addition, the closure of the contacts by sliding is under power, which inevitably causes erosion of the permanent contact areas, limiting the endurance of the device. A solution used in the case of pressure contacts is to equip the contact areas pellets, rivets or the like made of different materials, one of them is generally refractory to limit the risk of welding, or to provide a relief playing the role of spark arrester as in the publication EP 1 085 610 . The implementation of these achievements is relatively expensive.

La publication WO 2006/137687 A1 propose un appareil de coupure pourvu d'un contact mobile de phase et d'un contact mobile de neutre distincts, ayant des longueurs différentes pour générer des courses différentes de manière à décaler dans le temps l'accostage desdits contacts mobiles. Le décalage temporel obtenu est supérieur à 0,1s pour laisser le temps à des relais d'analyser le courant afin de déceler un éventuel dysfonctionnement. Or cet agencement ne permet pas de résoudre le problème posé.The publication WO 2006/137687 A1 proposes a switching device provided with a separate moving phase contact and a moving contact of neutral, having different lengths to generate different strokes so as to shift in time the docking of said movable contacts. The time offset obtained is greater than 0.1s to allow time for the relays to analyze the current in order to detect a possible malfunction. However, this arrangement does not solve the problem.

Exposé de l'invention:Presentation of the invention

La présente invention vise à pallier ces inconvénients en proposant un appareil de coupure électrique pourvu de contacts à pression à fort pouvoir de fermeture même sur des courants de court-circuit, dans lequel les risques de soudure et/ou d'érosion au niveau des zones de contact permanent sont considérablement réduits voire supprimés, pour atteindre un nombre élevé de cycles et ceci sans altération de la qualité du contact électrique.The present invention aims to overcome these drawbacks by proposing an electrical switching device provided with pressure contacts with high closing power even on short-circuit currents, in which the risks of welding and / or erosion at the zones permanent contact are considerably reduced or even eliminated, to achieve a high number of cycles and this without altering the quality of the electrical contact.

Dans ce but, l'invention concerne un appareil de coupure électrique selon la revendication 1.For this purpose, the invention relates to an electric switchgear according to claim 1.

Cette construction particulière permet notamment de différencier la zone de pare-étincelles des zones de contact permanent et de minimiser la présence de l'arc électrique à la fermeture en désynchronisant les rebonds par la création de décalages temporels d'accostage de l'ordre de 100µs entre deux contacts mobiles qui se succèdent dans un même ensemble.This particular construction makes it possible in particular to differentiate the spark arrester zone from the permanent contact zones and to minimize the presence of the electric arc at closing by desynchronizing the rebounds by the creation of temporal docking delays of the order of 100 μs. between two mobile contacts that succeed one another in the same set.

Le nombre de contacts mobiles peut être déterminé en fonction du calibre dudit appareil de coupure de sorte que la densité de courant par contact mobile ne dépasse pas une valeur d'intensité de 15kA en courant de crête.The number of moving contacts can be determined according to the rating of said switchgear so that the moving contact current density does not exceed an intensity value of 15kA peak current.

Selon le calibre dudit appareil de coupure, ledit ensemble peut comporter deux contacts mobiles centraux.Depending on the size of said switchgear, said assembly may comprise two central movable contacts.

Dans un même ensemble, les contacts mobiles sont avantageusement disposés symétriquement par rapport à un axe médian passant par le centre dudit ensemble, et les contacts mobiles latéraux décalés deux à deux par rapport audit contact mobile central pour former des étages.In the same set, the movable contacts are advantageously arranged symmetrically with respect to a median axis passing through the center of said assembly, and the lateral movable contacts offset two by two with respect to said central movable contact to form stages.

Dans la forme préférée de l'invention, le contact mobile central comporte un bossage central qui, lorsque ledit module de coupure est en position enclenchée, s'étend dans l'espace libre entre les contacts fixes de ladite paire. Selon les calibres, le contact mobile central peut être associé à un écran isolant qui remplace ou s'ajoute audit bossage.In the preferred form of the invention, the central movable contact comprises a central boss which, when said breaking module is in the engaged position, extends in the free space between the fixed contacts of said pair. According to the templates, the central mobile contact may be associated with an insulating screen that replaces or adds to said boss.

Chaque ensemble de plusieurs contacts mobiles peut être porté par un chariot électriquement isolant couplé audit mécanisme d'actionnement.Each set of multiple moving contacts may be carried by an electrically insulating carriage coupled to said actuating mechanism.

Ce chariot comporte avantageusement un logement pour chaque contact mobile, dans lequel chaque contact mobile est sollicité vers ladite paire de contacts fixes par un organe de rappel. Ces logements ont de préférence des profondeurs différentes pour positionner lesdits contacts mobiles d'un même ensemble en étages.This carriage advantageously comprises a housing for each movable contact, in which each movable contact is biased towards said pair of fixed contacts by a return member. These housings preferably have different depths to position said moving contacts of the same set in stages.

Description sommaire des dessins :Brief description of the drawings:

La présente invention et ses avantages apparaîtront mieux dans la description suivante d'un mode de réalisation donné à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels:

  • la figure 1 est une vue en perspective d'un appareil de coupure électrique selon l'invention comportant un module de commande associé à trois modules de coupure, dans lequel le dernier module de coupure est ouvert,
  • la figure 2 est une vue en coupe d'un module de coupure de l'appareil de la figure 1 en position enclenchée,
  • la figure 3 est une vue en perspective d'un ensemble de contacts mobiles selon un premier calibre de courant,
  • la figure 4 est une vue similaire à la figure 3 d'un ensemble de contacts mobiles selon un second calibre de courant, et
  • les figures 5A à 5C sont des vues de côté des contacts fixes et mobiles du module de coupure de la figure 2, dans trois positions d'accostage pendant la fermeture du circuit électrique.
The present invention and its advantages will appear better in the following description of an embodiment given by way of non-limiting example, with reference to the appended drawings, in which:
  • the figure 1 is a perspective view of an electrical switching device according to the invention comprising a control module associated with three breaking modules, in which the last breaking module is open,
  • the figure 2 is a sectional view of a cutoff module of the device of the figure 1 in the engaged position,
  • the figure 3 is a perspective view of a set of movable contacts according to a first current template,
  • the figure 4 is a view similar to the figure 3 a set of movable contacts according to a second current template, and
  • the FIGS. 5A to 5C are side views of the fixed and moving contacts of the break module of the figure 2 , in three docking positions during closing of the electrical circuit.

Illustrations de l'invention et différentes manières de la réaliser :Illustrations of the invention and different ways of making it:

En référence à la figure 1, l'appareil de coupure électrique 1 visé dans l'invention est habituellement constitué d'un module de commande 2 associé à un ou plusieurs modules de coupure 3 correspondant chacun à une phase d'un réseau électrique. Dans l'exemple illustré, l'appareil 1 comporte trois modules de coupure 3. Chaque module de coupure 3 comporte de manière connue un boîtier isolant 30 à l'intérieur duquel sont logés au moins deux contacts fixes 4, formant une paire, prolongés à l'extérieur dudit boîtier par des bornes de raccordement 40, et au moins un contact mobile 5 couplé à un mécanisme d'actionnement 6 commandé par le module de commande 2 pour être déplacé entre au moins une position déclenchée dans laquelle il est éloigné des contacts fixes et le circuit électrique est ouvert, et une position enclenchée dans laquelle il est en appui contre les contacts fixes et le circuit électrique est fermé. Le module de commande 2 peut être actionné manuellement par une poignée 20 et/ou automatiquement par une motorisation (non représentée). L'appareil de coupure 1 comporte dans l'exemple représenté des chambres de fractionnement 7 disposées au dessus des contacts fixes 4 et du contact mobile 5 pour capturer, étirer, refroidir puis éteindre l'arc électrique généré par le courant à chaque changement d'état dudit appareil.With reference to the figure 1 , the electrical switching device 1 referred to in the invention usually consists of a control module 2 associated with one or more cutoff modules 3 each corresponding to a phase of an electrical network. In the example illustrated, the device 1 comprises three cut-off modules 3. Each cut-off module 3 comprises in known manner an insulating housing 30 inside which are housed at least two fixed contacts 4, forming a pair, extended to outside said housing by connection terminals 40, and at least one contact mobile 5 coupled to an actuating mechanism 6 controlled by the control module 2 to be moved between at least one triggered position in which it is remote from the fixed contacts and the electrical circuit is open, and an engaged position in which it is in support against the fixed contacts and the electrical circuit is closed. The control module 2 can be operated manually by a handle 20 and / or automatically by a motor (not shown). The cut-off device 1 comprises in the example shown fractionating chambers 7 arranged above the fixed contacts 4 and the movable contact 5 to capture, stretch, cool and then extinguish the electric arc generated by the current at each change of state of said apparatus.

Cet appareil de coupure 1 doit pouvoir établir et couper des courants 1 dits normaux ou de défaut d'une valeur de 0 à 10In, In étant la valeur du courant nominal qui peut traverser l'appareil en permanence. Cet appareil doit aussi pouvoir établir, et le cas échéant couper, des courants de court-circuit dont la valeur peut atteindre 100 à 300 fois le courant nominal In, sans altération des zones de contact permanent afin de garantir une qualité de contact électrique constante dans le temps.This switching device 1 must be able to establish and cut currents 1 called normal or fault of a value of 0 to 10In, In being the value of the nominal current that can pass through the device permanently. This device must also be able to establish, and if necessary cut, short-circuit currents whose value can reach 100 to 300 times the rated current In, without altering the permanent contact zones in order to guarantee a constant quality of electrical contact in the weather.

La solution de l'invention est décrite en référence à un appareil électrique dont les modules de coupure ont une architecture interne spécifique, objet d'une autre demande de brevet déposée simultanément, mais peut bien entendu s'appliquer à toute autre architecture interne connue. Dans l'exemple représenté aux figures 1 et 2, les contacts fixes 4 et le contact mobile 5 sont disposés pour former une boucle de courant en forme d'oméga, symétrique par rapport à un axe médian A confondu avec l'axe de déplacement Fd du contact mobile 5, dans lequel s'exercent les forces dites de Laplace, appelées aussi efforts de compensation Fc, générées par le courant circulant dans la boucle de courant. Les pièces conductrices formant les contacts fixes 4 sont rigidement fixées au boîtier 30, pliées approximativement en S, disposées en opposition et séparées par un espace médian libre. La pièce conductrice formant le contact mobile 5 a une largeur supérieure à l'espace libre entre les deux contacts fixes 4 pour, en position enclenchée, être plaquée contre les contacts fixes 4. Ces pièces conductrices offrent chacune une zone de contact C située dans un plan incliné par rapport à l'axe médian A d'un angle sensiblement égal à 45°. Cet exemple n'est pas limitatif étant donné que les zones de contact C peuvent être comprises dans un plan incliné par rapport à l'axe médian A selon un angle pouvant être compris entre 0° et 90° dans lequel la valeur 0° est exclue.The solution of the invention is described with reference to an electrical apparatus whose breaking modules have a specific internal architecture, object of another patent application filed simultaneously, but can of course apply to any other known internal architecture. In the example shown in Figures 1 and 2 the fixed contacts 4 and the movable contact 5 are arranged to form an omega-shaped current loop, symmetrical with respect to a median axis A coinciding with the axis of displacement Fd of the moving contact 5, in which the so-called Laplace forces, also called compensation forces Fc, generated by the current flowing in the current loop. The conductive parts forming the fixed contacts 4 are rigidly fixed to the housing 30, folded approximately S, arranged in opposition and separated by a free median space. The conductive part forming the movable contact 5 has a width greater than the free space between the two fixed contacts 4 for, in the engaged position, to be pressed against the fixed contacts 4. These conductive parts each offer a contact area C located in a plane inclined relative to the central axis A of an angle substantially equal to 45 °. This example is not limiting since the contact areas C can be included in a plane inclined with respect to the median axis A at an angle that can be between 0 ° and 90 ° in which the value 0 ° is excluded .

L'appareil de coupure 1 selon l'invention se distingue de l'état de l'art par son contact mobile 5 qui est en fait constitué d'un ensemble 5, 5' de plusieurs contacts mobiles 5A-C, 5A-F, parallèles et décalés permettant d'échelonner dans le temps l'accostage des contacts mobiles sur les contacts fixes 4 et de ne pas dépasser une valeur d'intensité de 10 à 15kA de courant de crête par contact mobile. En correspondance, les contacts fixes 4 sont dimensionnés pour offrir une zone de contact C apte à recevoir la pluralité de contacts mobiles d'un même ensemble 5, 5'. Le nombre de contacts mobiles par ensemble 5, 5' peut être déterminé en fonction du calibre du courant nominal In. Les figures 3 et 4 illustrent deux variantes de réalisation d'un ensemble de contacts mobiles, dont un premier ensemble 5 qui comporte cinq contacts mobiles 5A-C et correspond à un calibre de 250A avec une valeur de crête de 50 à 75 kA, et un second ensemble 5' qui comporte douze contacts mobiles 5A-F et correspond à un calibre de 1600A avec une valeur de crête de 120 à 150 kA. Les ensembles 5, 5' sont symétriques par rapport à l'axe médian A de l'appareil de coupure 1 et comportent un ou deux contact(s) mobile(s) central(aux) 5A différent(s) des autres contacts mobiles 5B-F latéraux. Dans l'ensemble de la figure 3, le contact mobile central 5A est centré sur l'axe médian A et dans l'ensemble de la figure 4, les deux contacts mobiles centraux 5A sont symétriques à l'axe médian A. Chaque contact mobile central 5A est plus grand et/ou positionné en avance sur les autres pour être le premier à accoster les contacts fixes 4 afin d'établir le courant, et le dernier à quitter les contacts fixes 4 afin de couper le courant. C'est lui qui subit l'arc électrique et joue par conséquent le rôle de pare-étincelles.The switching device 1 according to the invention is distinguished from the state of the art by its movable contact 5 which is in fact constituted by an assembly 5, 5 'of a plurality of movable contacts 5A-C, 5A-F, parallel and staggered for staggering in time the docking of the movable contacts on the fixed contacts 4 and not to exceed an intensity value of 10 to 15 kA peak current per moving contact. Correspondingly, the fixed contacts 4 are sized to provide a contact area C adapted to receive the plurality of movable contacts of the same set 5, 5 '. The number of movable contacts per set 5, 5 'can be determined according to the nominal current rating In. Figures 3 and 4 illustrate two alternative embodiments of a set of movable contacts, including a first assembly 5 which has five movable contacts 5A-C and corresponds to a 250A rating with a peak value of 50 to 75 kA, and a second set 5 ' which has twelve movable contacts 5A-F and corresponds to a rating of 1600A with a peak value of 120 to 150 kA. The assemblies 5, 5 'are symmetrical with respect to the central axis A of the breaking device 1 and comprise one or two movable contact (s) central (s) 5A different (s) other 5B movable contacts -F lateral. In the whole of the figure 3 , the central movable contact 5A is centered on the median axis A and in the whole of the figure 4 , the two central movable contacts 5A are symmetrical to the central axis A. Each central movable contact 5A is larger and / or positioned in advance of the others to be the first to dock the fixed contacts 4 in order to establish the current, and the last to leave the fixed contacts 4 to turn off the power. It is he who undergoes the electric arc and therefore plays the role of spark arrester.

Dans les exemples représentés, le contact mobile central 5A est constitué d'une pièce conductrice sous la forme d'une lame comportant dans sa partie supérieure un bossage central 50 lui conférant une forme sensiblement triangulaire symétrique par rapport à l'axe médian A. Bien entendu, toute autre forme peut convenir. Lorsque le module de coupure 3 est en position enclenchée, le bossage 50 s'étend dans l'espace libre entre les contacts fixes 4 à l'extérieur de la boucle de courant. Ce bossage 50 est relié aux zones de contact C par un épaulement 51 formant un nez sur lequel s'accroche l'arc électrique généré par le courant à la fermeture et à l'ouverture du circuit électrique, libérant ainsi rapidement les zones de contact C. Ce bossage 50 définit ensuite une pente 52 qui monte dans la direction des efforts de compensation Fc et accompagne le déplacement dudit arc électrique poussé par ces efforts de compensation Fc en direction des chambres de fractionnement 7. Le contact mobile central 5A peut être complété par un écran isolant (non représenté) qui s'étend en lieu et place du bossage 50 ou s'ajoute à ce bossage 50 pour faciliter l'extinction de l'arc électrique notamment sous faible courant de l'ordre de 0,1 In par exemple.In the examples shown, the central movable contact 5A consists of a conductive part in the form of a blade having in its upper part a central boss 50 conferring a substantially triangular shape symmetrical with respect to the median axis A. Well Of course, any other form may be suitable. When the breaking module 3 is in the engaged position, the boss 50 extends in the free space between the fixed contacts 4 outside the current loop. This boss 50 is connected to the contact areas C by a shoulder 51 forming a nose on which the electric arc generated by the current clings to the closing and opening of the electric circuit, thus rapidly releasing the contact areas C This boss 50 then defines a slope 52 which rises in the direction of the compensating forces Fc and accompanies the displacement of the electric arc pushed by these compensating forces Fc towards the fractionating chambers 7. The central movable contact 5A can be completed by an insulating screen (not shown) which extends in place of the boss 50 or adds to this boss 50 to facilitate the extinction of the electric arc especially in low current of the order of 0.1 In by example.

Les autres contacts mobiles latéraux 5B-F sont constitués d'une pièce conductrice sous la forme d'une lame symétrique par rapport à l'axe médian A et pourvue latéralement de deux zones de contact C. Ils peuvent avoir des dimensions identiques ou non. Ils sont au moins identiques deux à deux symétriquement par rapport à l'axe médian A.The other lateral movable contacts 5B-F consist of a conductive part in the form of a blade symmetrical with respect to the central axis A and provided laterally with two contact zones C. They may have identical dimensions or not. They are at least identical two by two symmetrically with respect to the median axis A.

Les contacts mobiles 5A-C, 5A-F d'un même ensemble 5, 5' sont logés dans un chariot 8 électriquement isolant, délimitant des logements 80 séparés et parallèles, de profondeurs différentes pour que les contacts mobiles latéraux 5B-C, 5B-F soient décalés deux à deux par rapport au contact mobile central 5A proéminent et former des étages E1, E2. La course d'un étage à l'autre peut être égale ou non. Ce chariot 8 peut être formé d'une seule pièce ou de plusieurs pièces assemblées, ces pièces pouvant être réalisée(s) par exemple par moulage de matières synthétiques. Le chariot 8 est couplé au mécanisme d'actionnement 6.The movable contacts 5A-C, 5A-F of the same assembly 5, 5 'are housed in an electrically insulating carriage 8, delimiting separate and parallel housings 80, of different depths for the lateral movable contacts 5B-C, 5B -F are shifted two by two with respect to the prominent central movable contact 5A and form stages E1, E2. The race from one floor to another may be equal or not. This carriage 8 can be formed in one piece or in several assembled parts, these parts can be made for example by molding plastics. The carriage 8 is coupled to the actuating mechanism 6.

Dans l'exemple représenté, le mécanisme d'actionnement 6 de l'ensemble 5, 5' de contacts mobiles comporte un axe d'entraînement 60 Lié en rotation avec la poignée 20 par un renvoi d'angle (non visible) et/ou commandé par un second organe (non représenté) emboîté dans l'alésage carré 61. Un système de transformation du mouvement de rotation de l'axe d'entraînement 60 en un mouvement de translation permet de déplacer un chariot 64 portant le chariot 8 dans l'axe médian A. Ce système de transformation de mouvement comporte une paire de bielles 62, 63 articulées, mais tout autre moyen équivalent est envisageable. La première bielle 62 est solidaire de l'axe d'entraînement 60 et couplée en rotation à la seconde bielle 63 par une première articulation B1. La seconde bielle 63 est couplée en rotation avec le chariot 64, et simultanément avec le chariot 8, par une seconde articulation B2. Le chariot 64 est guidé en translation par rapport au boîtier 30 au moyen de rails, de nervures ou de tout autre moyen équivalent, dans lesquelles circulent les extrémités saillantes de l'axe formant l'articulation B2.In the example shown, the actuating mechanism 6 of the set 5, 5 'of movable contacts comprises a drive shaft 60 connected in rotation with the handle 20 by an angle gear (not visible) and / or controlled by a second member (not shown) fitted into the square bore 61. A system for converting the rotational movement of the drive shaft 60 into a translation movement makes it possible to move a carriage 64 carrying the carriage 8 into the median axis A. This motion transformation system comprises a pair of rods 62, 63 hinged, but any other equivalent means is conceivable. The first link 62 is integral with the drive shaft 60 and rotatably coupled to the second link 63 by a first link B1. The second connecting rod 63 is coupled in rotation with the carriage 64, and simultaneously with the carriage 8, by a second articulation B2. The carriage 64 is guided in translation relative to the housing 30 by means of rails, ribs or any other equivalent means, in which the projecting ends of the axis forming the articulation B2 circulate.

Un organe de rappel 65 est interposé entre le chariot 64 et chaque contact mobile 5A-C, 5A-F pour exercer un effort presseur déterminé sur chacun des contacts mobiles lorsqu'il est plaqué contre les contacts fixes 4. Dans la configuration illustrée, cet effort presseur s'ajoute aux efforts de compensation Fc générés par le courant I.A return member 65 is interposed between the carriage 64 and each movable contact 5A-C, 5A-F to exert a determined pressing force on each of the movable contacts when it is pressed against the fixed contacts 4. In the configuration illustrated, this pressure force is added to the compensation forces Fc generated by current I.

Les figures 5A à 5C illustrent en trois étapes l'accostage de l'ensemble 5 de contacts mobiles 5A-5C de la figure 3 sur les contacts fixes 4 d'un module de coupure 3 pour fermer le circuit électrique. A l'enclenchement du module de coupure 3, lorsque le chariot 64 est déplacé dans la direction Fd en direction des contacts fixes 4 par le mécanisme d'actionnement 6, l'accostage des contacts fixes 4 s'effectue par le contact mobile central 5A qui est en avance sur les autres et subit le premier un rebond (cf. fig. 5A). Quelques 100µs plus tard, les deuxièmes contacts mobiles 5B qui entourent le contact mobile central 5A se ferment sur les contacts fixes 4, court-circuitant l'arc électrique ayant pris naissance lors du rebond du contact mobile central 5A, et subissent à leur tour un rebond (cf. fig. 5B). Puis quelques 100µs plus tard, les troisièmes contacts mobiles 5C qui suivent, se ferment à leur tour sur les contacts fixes 4, court-circuitant l'arc électrique ayant pris naissance lors des rebonds des deuxièmes contacts mobiles 5B (cf. fig. 5C), et subissent à leur tour un rebond. Le contact mobile central 5A qui était le premier à se fermer, termine sa course de rebond, court-circuitant l'arc électrique ayant pris naissance lors des rebonds des troisièmes contacts mobiles 5C. Et ainsi de suite, jusqu'à stabilisation des rebonds. La durée totale de la présence de l'arc électrique de même que la durée ponctuelle de la présence de l'arc électrique à chaque accostage sont fortement réduites, permettant d'atteindre un nombre élevé de cycles de fermeture et une endurance accrue.The FIGS. 5A to 5C illustrate in three steps the docking of the set 5 of movable contacts 5A-5C of the figure 3 on the fixed contacts 4 of a breaking module 3 to close the electrical circuit. On engagement of the breaking module 3, when the carriage 64 is moved in the direction Fd towards the fixed contacts 4 by the actuating mechanism 6, the docking of the fixed contacts 4 is effected by the central movable contact 5A. which is ahead of the others and undergoes the first rebound (cf. Fig. 5A ). Some 100μs later, the second movable contacts 5B surrounding the central movable contact 5A close on the fixed contacts 4, short-circuiting the electric arc that arose during the rebound of the movable contact central 5A, and in turn undergo a rebound (cf. Fig. 5B ). Then some 100μs later, the third movable contacts 5C that follow, are closed in turn on the fixed contacts 4, short-circuiting the electric arc that arises during the rebounds of the second movable contacts 5B (cf. Fig. 5C ), and in turn undergo a rebound. The central movable contact 5A, which was the first to close, ends its rebound stroke, short-circuiting the electric arc that arises during rebounds of the third movable contacts 5C. And so on, until rebound stabilization. The total duration of the presence of the electric arc as well as the specific duration of the presence of the electric arc at each docking are greatly reduced, making it possible to achieve a high number of closing cycles and increased endurance.

Par ailleurs, lors de l'ouverture du circuit électrique, les contacts mobiles latéraux 5B-C, 5B-F sont totalement exemptés d'arc électrique, l'arc électrique ne s'établissant que sur le contact mobile central 5A lorsqu'il quitte en dernier les contacts fixes 4. Par conséquent, les contacts mobiles latéraux 5B-C, 5B-F ne subissent aucune usure, ni érosion, ni fusion locale dues à l'arc électrique, et participent pleinement au passage permanent du courant électrique.Furthermore, when the electrical circuit is opened, the lateral movable contacts 5B-C, 5B-F are totally arc-free, the electric arc being established only on the central mobile contact 5A when it leaves lastly the fixed contacts 4. Therefore, the lateral movable contacts 5B-C, 5B-F undergo no wear, erosion or local melting due to the electric arc, and participate fully in the permanent passage of the electric current.

Il ressort clairement de cette description que l'invention permet d'atteindre les buts fixés, notamment la multiplication des contacts mobiles et leur décalage temporel permettant de minimiser les effets néfastes des rebonds engendrés lors de la fermeture du circuit électrique. Ce décalage permet en fait de désynchroniser les rebonds de chaque contact mobile et de minimiser le temps durant lequel aucun contact mobile n'est en contact physique avec le contact fixe. L'endurance électrique de l'appareil de coupure est ainsi grandement améliorée.It is clear from this description that the invention achieves the goals set, including the multiplication of mobile contacts and their time offset to minimize the adverse effects of bounces generated during the closure of the electrical circuit. This offset actually makes it possible to desynchronize the bounces of each moving contact and to minimize the time during which no moving contact is in physical contact with the fixed contact. The electrical endurance of the switchgear is thus greatly improved.

La présente invention n'est pas limitée aux exemples de réalisation décrits mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiments described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.

Claims (10)

  1. Electrical cut-off device (1) with high making capacity provided with a control module (2) associated with at least one cut-off module (3) corresponding to a phase of an electrical network, said cut-off module including at least one moving contact (5) associated with at least one pair of fixed contacts (4), said moving contact (5) being coupled with an actuator mechanism (6) controlled by said control module (2) so as to be moved between at least one switched-off position in which the moving contact is distant from the pair of fixed contacts and the electrical circuit is open, and a switched-on position in which the moving contact is resting on the pair of fixed contacts and the electrical circuit is closed, characterized in that it comprises at least one set (5, 5') of several moving contacts (5A-C ; 5A-F) associated with said pair of fixed contacts (4), the moving contacts of said set (5, 5') being parallel and offset in space with respect to each other in order to stagger in time the approach of said moving contacts on said pair of fixed contacts when closing the electrical circuit, said set (5, 5') including at least one central moving contact (5A) that is ahead of the other moving contacts (5B-C ; 5B-F) arranged laterally around said central moving contact (5A), so that it is the first to establish the current when closing the electrical circuit and the last to cut off the current when opening said circuit.
  2. Device according to claim 1, characterized in that said set (5, 5') comprises a number of moving contacts (5A-C; 5A-F) determined according to the rating of said cut-off device (1), so that the current density for each moving contact does not exceed an intensity value of 15kA for the peak current
  3. Device according to claim 1, characterized in that said set (5') comprises two central moving contacts (5A).
  4. Device according to any of the previous claims, characterized in that in said set (5, 5'), said moving contacts (5A-C ; 5A-F) are arranged symmetrically with respect to a centerline passing through the center of said set.
  5. Device according to claim 4, characterized in that in said set (5, 5'), said lateral moving contacts (5B-C ; 5B-F) are offset two by two with respect to said central moving contact (5A) in order to form stages (E1, E2).
  6. Device according to any of the previous claims, characterized in that said central moving contact (5A) includes a central boss (50) that, when said cut-off module (3) is in its switched-on position, extends in the free space between the fixed contacts (4) of said pair.
  7. Device according to any of the previous claims, characterized in that said central moving contact (5A) is associated with an insulating screen that, when said cut-off module (3) is in its switched-on position, extends in the free space between the fixed contacts (4) of said pair, outside of said current loop.
  8. Device according to claim 1, characterized in that each set (5, 5') of several moving contacts (5A-C ; 5A-F) is carried by an electrically insulating carriage (8) coupled with said actuator mechanism (6).
  9. Device according to claim 8, characterized in that said carriage (8) includes a seat (80) for each moving contact, in which each moving contact is pressed against said pair of fixed contacts (4) by a return means (65).
  10. Device according to claim 9, characterized in that the seats (80) of a same carriage (8) have different depths for positioning said moving contacts (5A-C ; 5A-F) of a same set (5, 5') in stages.
EP12360063.7A 2011-09-01 2012-08-09 Electrical switchgear with high making capacity Active EP2565890B1 (en)

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FR1157713A FR2979744B1 (en) 2011-09-01 2011-09-01 ELECTRIC CUTTING APPARATUS WITH HIGH CLOSING POWER

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FR2979744B1 (en) 2015-05-01
EP2565890A1 (en) 2013-03-06
US20130056339A1 (en) 2013-03-07
FR2979744A1 (en) 2013-03-08
US8859916B2 (en) 2014-10-14

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