EP0646938A1 - Circuit breaker with improved arc chute - Google Patents
Circuit breaker with improved arc chute Download PDFInfo
- Publication number
- EP0646938A1 EP0646938A1 EP94410082A EP94410082A EP0646938A1 EP 0646938 A1 EP0646938 A1 EP 0646938A1 EP 94410082 A EP94410082 A EP 94410082A EP 94410082 A EP94410082 A EP 94410082A EP 0646938 A1 EP0646938 A1 EP 0646938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- arc
- separators
- breaker according
- contact
- 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.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
Definitions
- Electric circuit breaker having a fixed contact, a movable contact actuated by a control mechanism between a closed position in which the movable contact is in engagement with the fixed contact, and an open position after separation of said contacts for interrupting the current passing through the circuit breaker , a pair of current supply conductors, and at least one arc extinguishing chamber arranged in the vicinity of the contacts to cool and interrupt the arc during the phase of separation of said contacts, said chamber comprising a stack of separators of deionization fitted with inverted U-shaped slots, the fixed contact being housed inside the arc extinguishing chamber, and cooperating with the contact part of the movable contact movable in the arc-forming volume formed by the narrow slits of successive separators.
- the arc only fits correctly between the separators for relatively low currents. Above a certain intensity, it remains in the arc-forming chamber, or only partially enters the extinguishing chamber because of the plugging effect due to the high pressure.
- the arc nevertheless manages to cool by a combined effect of convection, conduction in contact with the edge of the separators, and also of radiation.
- the insertion of the arc becomes possible when the diameter of the arc decreases, which occurs when the current begins to decrease after limitation. Such a device delays the moment of extinction of the arc.
- the object of the invention is to limit the pressure generated in an arc extinguishing chamber of a circuit breaker and to improve breaking independently of the value of the short-circuit current.
- the circuit breaker according to the invention is characterized in that the lateral walls for confining the slots surround the movable contact, which is arranged on edge, with little play, that the end of the movable contact piece travels a path close to the bottom of the slots, always remaining inside the chamber, and that the volume V2 occupied by the chamber is greater than the volume V1 remaining free inside the pole.
- the arrangement of the arc formation zone in the confinement volume of the slits of the sheets of the extinguishing chamber reduces the development of the arc to a minimum trajectory which contributes to an early cooling of the arc. This results in a significant reduction in the volume of gas which maintains the internal pressure at a moderate value, even in the presence of a high short-circuit current.
- the arc quickly penetrates into the interstices of the different sheets, splitting into several short arcs. The rapid increase in the arc voltage is then favorable for rapid extinction of the arc, whatever the value of the current to be interrupted.
- Figure 1 is a schematic sectional view of a circuit breaker pole equipped with arc extinguishing chambers according to the invention.
- Figure 2 is a sectional view along line 2-2 of Figure 1.
- Figure 3 shows a variant of Figure 2.
- FIG. 4 is a side view of FIG. 3.
- a pole 10 of an electrical circuit breaker with molded insulating housing 12 comprises a movable contact 14 in the form of a bridge carried by a switching bar 16 of insulating material.
- the movable contact bridge 14 is provided with two contact parts 14a, 14b cooperating on one side with a first fixed contact 18, and on the opposite side with a second fixed contact 20.
- the contact bridge 14 is mounted floating on the bar 16 by means of two springs 22, 24 of contact pressure.
- the first fixed contact 18 is connected to a range 26 of current supply
- the second fixed contact 20 is connected to another range 28 of current supply, which is diametrically opposite with respect to the axis 30 of rotation of the bar 16.
- each pair of contacts 14a, 18; 14b, 20 of the pole 10 is associated with an arc extinguishing chamber 32 formed by a stack of separators or deionization plates 34, extending substantially parallel to one another, being separated by regular intervals.
- Each sheet 34 is made of ferromagnetic steel, in particular based on iron-tungsten, and is shaped into a quadrangular plate, equipped with a central slot 36 in a U shape (FIG. 2), adapted to the passage of the movable contact 14.
- the presence of the parallel sheets 14 in the chamber 32 increases the exchange surface between the hot gases and the metal, followed by the splitting of the arc into a plurality of partial arcs hung between the successive sheets 34. n results in an increase in the arc voltage, and a rapid extinction of the arc.
- volume V1 formed between each chamber 32 and the switching bar 16 is less than the volume V2 occupied by said chamber 32.
- Such an architecture of the pole 10 with a minimum of free volumes, is suitable for the permanent maintenance of the arc in chamber 32. This results in effective cooling of the arc, combined with moderate internal pressure.
- FIG. 2 it can be seen that the fixed contact 18 is housed inside the extinguishing chamber 32, and that the movement of the contact piece 14a of the movable contact 14 in the slots 36 of the sheets 34 takes place with a small clearance.
- the end of the contact piece 14a moves opposite the bottom 38 of the slot 36 of each sheet 34, and the side walls 40, 42 of the narrow slot 36 substantially match the shape of the movable contact 14
- Such penetration of the movable contact 14 into the slots 36 of the sheets 34 makes it possible to obtain the birth of the arc directly inside the chamber 32.
- the initial arc develops in the volume of the slots 36, and s 'hooks quickly on the sheets 34 by splitting into several short arcs.
- the early cooling of the arc restricts the volume occupied by the latter in the extinguishing chamber 32, and thereby maintains the pressure at a moderate value, even in the presence of a short-circuit current.
- the movable contact 14 is arranged on the edge, and during its movement, it always remains inside the chamber 32 without leaving the slots 36.
- the current supply range 26, 28 serving as a support for the associated fixed contact 18, 20 is advantageously shaped as a half-loop promoting the rapid development of the arc towards the sheets 34.
- the sheets 134 of the arc extinguishing chamber 132 also have narrow slots 136 in the shape of a U with side walls 140, 142, but the thickness of the two side branches 140a, 142a disposed on either side of the slots 136 is greater than that of the common posterior portion 143.
- the arc is quickly inserted by magnetic attraction into the interstices 145, 146, 147 formed between the posterior parts 143 of the successive sheets 134.
- Each interval between the sheets 134 at the level of the front part of the branches 140a, 142a has a thickness substantially equal to half the thickness of the interstices 145, 146, 147.
- Such an extinction chamber 132 makes it possible to obtain a cutoff arc fast.
- the sheets can also be replaced by separators made of porous refractory material, or by blocks of agglomerated metal balls.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Disjoncteur électrique ayant un contact fixe , un contact mobile actionné par un mécanisme de commande entre une position fermée dans laquelle le contact mobile est en engagement avec le contact fixe , et une position ouverte après séparation desdits contacts pour l'interruption du courant traversant le disjoncteur, une paire de conducteurs d'amenée de courant, et au moins une chambre d'extinction d'arc disposée au voisinage des contacts pour refroidir et interrompre l'arc pendant la phase de séparation desdits contacts, ladite chambre comprenant un empilage de séparateurs de désionisation équipés de fentes en forme de U renversé, le contact fixe étant logé à l'intérieur de la chambre d'extinction d'arc , et coopèrant avec la pièce de contact du contact mobile déplaçable dans le volume de formation d'arc formé par les fentes étroites des séparateurs successifs.Electric circuit breaker having a fixed contact, a movable contact actuated by a control mechanism between a closed position in which the movable contact is in engagement with the fixed contact, and an open position after separation of said contacts for interrupting the current passing through the circuit breaker , a pair of current supply conductors, and at least one arc extinguishing chamber arranged in the vicinity of the contacts to cool and interrupt the arc during the phase of separation of said contacts, said chamber comprising a stack of separators of deionization fitted with inverted U-shaped slots, the fixed contact being housed inside the arc extinguishing chamber, and cooperating with the contact part of the movable contact movable in the arc-forming volume formed by the narrow slits of successive separators.
L'usage de séparateurs parallèles en acier magnétique dans une chambre d'extinction d'arc permet d'augmenter la surface d'échange entre les gaz chauds et le métal, et dans les cas favorables, de fractionner l'arc en une pluralité d'arcs courts permettant une élévation de la tension d'arc d'une vingtaine de volts par séparateur. Dans les disjoncteurs connus, les contacts sont souvent agencés dans une chambre de formation d'arc séparée de la chambre d'extinction d'arc par une certaine distance autorisant le développement de l'arc. Le volume de gaz engendré par l'arc étant proportionnel à sa température, la pression à l'intérieur de la chambre peut atteindre une valeur élevée lorsque le volume de gaz devient trop grand. Ce phénomène existe notamment avec l'usage de matériaux isolants gazogènes en contact avec l'arc. En pratique, l'arc ne s'insère correctement entre les séparateurs que pour les courants relativement faibles. Au delà d'une certaine intensité, il reste dans la chambre de formation d'arc, ou rentre que partiellement dans la chambre d'extinction à cause de l'effet de bouchon dû à la pression élevée. L'arc arrive néanmoins à se refroidir par un effet combiné de convection, de conduction au contact de la tranche des séparateurs, et également de rayonnement. L'insertion de l'arc devient possible lorsque le diamètre de l'arc diminue, ce qui se produit quand le courant commence à décroître après limitation. Un tel dispositif retarde l'instant de l'extinction de l'arc.The use of parallel magnetic steel separators in an arc extinguishing chamber makes it possible to increase the exchange surface between the hot gases and the metal, and in favorable cases, to split the arc into a plurality of 'short arcs allowing an increase in the arc voltage of around twenty volts per separator. In known circuit breakers, the contacts are often arranged in an arc forming chamber separated from the arc extinguishing chamber by a certain distance allowing the development of the arc. The volume of gas generated by the arc being proportional to its temperature, the pressure inside the chamber can reach a high value when the volume of gas becomes too large. This phenomenon exists in particular with the use of gas-generating insulating materials in contact with the arc. In practice, the arc only fits correctly between the separators for relatively low currents. Above a certain intensity, it remains in the arc-forming chamber, or only partially enters the extinguishing chamber because of the plugging effect due to the high pressure. The arc nevertheless manages to cool by a combined effect of convection, conduction in contact with the edge of the separators, and also of radiation. The insertion of the arc becomes possible when the diameter of the arc decreases, which occurs when the current begins to decrease after limitation. Such a device delays the moment of extinction of the arc.
L'objet de l'invention consiste à limiter la pression engendrée dans une chambre d'extinction d'arc d'un disjoncteur et à améliorer la coupure indépendamment de la valeur du courant de court-circuit.The object of the invention is to limit the pressure generated in an arc extinguishing chamber of a circuit breaker and to improve breaking independently of the value of the short-circuit current.
Le disjoncteur selon l'invention est caractérisé en ce que les parois latérales de confinement des fentes entourent à faible jeu le contact mobile lequel est disposé de chant, que l'extrémité de la pièce de contact mobile parcourt une trajectoire proche du fond des fentes, en restant toujours à l'intérieur de la chambre, et que le volume V2 occupé par la chambre soit supérieur au volume V1 restant libre à l'intérieur du pôle.The circuit breaker according to the invention is characterized in that the lateral walls for confining the slots surround the movable contact, which is arranged on edge, with little play, that the end of the movable contact piece travels a path close to the bottom of the slots, always remaining inside the chamber, and that the volume V2 occupied by the chamber is greater than the volume V1 remaining free inside the pole.
La disposition de la zone de formation d'arc dans le volume de confinement des fentes des tôles de la chambre d'extinction réduit le développement de l'arc à une trajectoire minimum qui contribue à un refroidissement précoce de l'arc. Il en résulte une diminution notable du volume de gaz qui maintient la pression interne à une valeur modérée, même en présence d'un courant de court-circuit élevé. L'arc pénètre rapidement dans les interstices des différentes tôles en se fractionnant en plusieurs arcs courts. L'accroissement rapide de la tension d'arc est alors favorable à une extinction rapide de l'arc, quel que soit la valeur du courant à interrompre.The arrangement of the arc formation zone in the confinement volume of the slits of the sheets of the extinguishing chamber reduces the development of the arc to a minimum trajectory which contributes to an early cooling of the arc. This results in a significant reduction in the volume of gas which maintains the internal pressure at a moderate value, even in the presence of a high short-circuit current. The arc quickly penetrates into the interstices of the different sheets, splitting into several short arcs. The rapid increase in the arc voltage is then favorable for rapid extinction of the arc, whatever the value of the current to be interrupted.
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 aux dessins annexés, dans lesquels :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 drawings, in which:
La figure 1 est une vue schématique en coupe d'un pôle de disjoncteur équipé de chambres d'extinction d'arc selon l'invention.Figure 1 is a schematic sectional view of a circuit breaker pole equipped with arc extinguishing chambers according to the invention.
La figure 2 est une vue en coupe selon la ligne 2-2 de la figure 1.Figure 2 is a sectional view along line 2-2 of Figure 1.
La figure 3 montre une variante de la figure 2.Figure 3 shows a variant of Figure 2.
La figure 4 est une vue de profil de la figure 3.FIG. 4 is a side view of FIG. 3.
Sur la figure 1, un pôle 10 d'un disjoncteur électrique à boîtier 12 isolant moulé, comporte un contact mobile 14 en forme de pont porté par un barreau 16 de commutation en matériau isolant. Le pont de contact mobile 14 est doté de deux pièces de contact 14a, 14b coopérant d'un côté avec un premier contact fixe 18, et du côté opposé avec un deuxième contact fixe 20. Le pont de contact 14 est monté flottant sur le barreau 16 par l'intermédiaire de deux ressorts 22, 24 de pression de contact. Le premier contact fixe 18 est raccordé à une plage 26 d'amenée de courant, et le deuxième contact fixe 20 est relié à une autre plage 28 d'amenée de courant, laquelle est diamétralement opposée par rapport à l'axe 30 de rotation du barreau 16.In FIG. 1, a pole 10 of an electrical circuit breaker with molded
A chaque paire de contacts 14a, 18 ; 14b, 20 du pôle 10 est associée une chambre d'extinction d'arc 32 formée par un empilage de séparateurs ou tôles 34 de désionisation, s'étendant sensiblement parallèlement les unes par rapport aux autres, en étant séparées par des intervalles réguliers. Chaque tôle 34 est réalisée en acier ferromagnétique notamment à base de fer-tungstène, et est conformée en une plaque quadrangulaire, équipée d'une fente 36 centrale en U (figure 2), adaptée au passage du contact mobile 14.At each pair of
La présence des tôles 14 parallèles dans la chambre 32 augmente la surface d'échange entre les gaz chauds et le métal, suivi du fractionnement de l'arc en une pluralité d'arcs partiels accrochés entre les tôles 34 successives. n en résulte une augmentation de la tension d'arc, et une extinction rapide de l'arc.The presence of the
Il est primordial que le volume V1 ménagé entre chaque chambre 32 et le barreau de commutation 16, soit inférieur au volume V2 occupé par ladite chambre 32. Une telle architecture du pôle 10 avec un minimum de volumes libres, est adaptée au maintien permanent de l'arc dans la chambre 32. n en résulte un refroidissement efficace de l'arc, combiné avec une pression interne modérée.It is essential that the volume V1 formed between each
Sur la figure 2, on remarque que le contact fixe 18 est logé à l'intérieur de la chambre d'extinction 32, et que le débattement de la pièce de contact 14a du contact mobile 14 dans les fentes 36 des tôles 34 s'effectue avec un faible jeu. L'extrémité de la pièce de contact 14a se déplace en regard du fond 38 de la fente 36 de chaque tôle 34, et les parois latérales 40, 42 de la fente 36 étroite épousent sensiblement la forme du contact mobile 14. Une telle pénétration du contact mobile 14 dans les fentes 36 des tôles 34 permet d'obtenir la naissance de l'arc directement à l'intérieur de la chambre 32. L'arc initial se développe dans le volume des fentes 36, et s'accroche rapidement sur les tôles 34 en se fractionnant en plusieurs arcs courts. Le refroidissement précoce de l'arc restreint le volume occupé par ce dernier dans la chambre d'extinction 32, et maintient de ce fait la pression à une valeur modérée, même en présence d'un courant de court-circuit.In FIG. 2, it can be seen that the fixed
Le contact mobile 14 est disposé de chant, et lors de son déplacement, il reste toujours à l'intérieur de la chambre 32 sans sortir des fentes 36.The
La plage d'amenée de courant 26, 28 servant de support au contact fixe 18, 20 associé est avantageusement conformée en demi-boucle favorisant le développement rapide de l'arc vers les tôles 34.The
Selon la variante illustrée aux figures 3 et 4, les tôles 134 de la chambre d'extinction d'arc 132 comportent également des fentes 136 étroites en forme de U à parois latérales 140, 142, mais l'épaisseur des deux branches latérales 140a, 142a disposées de part et d'autre des fentes 136 est supérieure à celle de la partie postérieure 143 commune. Après séparation des contacts 18, 14a ; 20, 14b, l'arc s'insère rapidement par attraction magnétique dans les interstices 145, 146, 147 ménagés entre les parties postérieures 143 des tôles 134 successives. Chaque intervalle entre les tôles 134 au niveau de la partie antérieure des branches 140a, 142a présente une épaisseur sensiblement égale à la moitié de l'épaisseur des interstices 145, 146, 147. Une telle chambre d'extinction 132 permet d'obtenir une coupure rapide de l'arc.According to the variant illustrated in FIGS. 3 and 4, the
Les tôles peuvent également être remplacées par des séparateurs en matériau réfractaire poreux, ou par des blocs de billes métalliques agglomérées.The sheets can also be replaced by separators made of porous refractory material, or by blocks of agglomerated metal balls.
Claims (9)
caractérisé en ce que les parois latérales (40, 42; 140, 142) de confinement des fentes (36, 136) entourent à faible jeu le contact mobile (14) lequel est disposé de chant, que l'extrémité de la pièce de contact mobile (14a, 14b) parcourt une trajectoire proche du fond des fentes (36, 136), en restant toujours à l'intérieur de la chambre (31, 132), et que le volume V2 occupé par la chambre (32) soit supérieur au volume V1 restant libre à l'intérieur du pôle (10).Electric circuit breaker having a fixed contact (18, 20), a movable contact (14, 14a, 14b) actuated by a control mechanism between a closed position in which the movable contact (14, 14a, 14b) is in engagement with the contact fixed (18, 20), and an open position after separation of said contacts for interrupting the current passing through the circuit breaker, a pair of current supply conductors (26, 28), and at least one extinguishing chamber for arc (32, 132) disposed in the vicinity of the contacts to cool and interrupt the arc during the separation phase of said contacts, said chamber comprising a stack of deionization separators (34, 134) equipped with shaped slots (36, 136) of inverted U, the fixed contact (18, 20) being housed inside the arc extinguishing chamber (32, 132), and cooperating with the contact part (14a, 14b) of the movable contact (14 ) movable in the arc-forming volume formed by the narrow slots (36, 136) d are successive separators (34, 134),
characterized in that the side walls (40, 42; 140, 142) confining the slots (36, 136) surround the movable contact (14) which is arranged in a slight clearance, as the end of the contact piece mobile (14a, 14b) travels a path close to the bottom of the slots (36, 136), always remaining inside the chamber (31, 132), and that the volume V2 occupied by the chamber (32) is greater to the volume V1 remaining free inside the pole (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9311939 | 1993-10-05 | ||
| FR9311939A FR2711012B1 (en) | 1993-10-05 | 1993-10-05 | Circuit breaker with improved arc extinguishing chamber. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0646938A1 true EP0646938A1 (en) | 1995-04-05 |
Family
ID=9451612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94410082A Ceased EP0646938A1 (en) | 1993-10-05 | 1994-09-26 | Circuit breaker with improved arc chute |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0646938A1 (en) |
| FR (1) | FR2711012B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002041439A1 (en) * | 2000-11-16 | 2002-05-23 | Moeller Gmbh | Contact arrangement for current-limiting protective circuit breakers |
| WO2008071320A2 (en) | 2006-12-14 | 2008-06-19 | Ids-Technology Gmbh | Electrical switch with a contact element mounted such that it can rotate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1446692A (en) * | 1964-11-23 | 1966-07-22 | Stotzkontakt G M B H | Arc extinguishing chamber, in particular with deionization plates |
| FR2133596A1 (en) * | 1971-04-01 | 1972-12-01 | Westinghouse Electric Corp | |
| US3801760A (en) * | 1972-08-23 | 1974-04-02 | Gen Electric | Electric circuit breaker or the magnetic blowout type |
| EP0018454A1 (en) * | 1977-10-04 | 1980-11-12 | Dorman Smith Switchgear Limited | Electric circuit breaker |
| EP0174904A1 (en) * | 1984-08-23 | 1986-03-19 | Siemens Aktiengesellschaft | Contact device for a low voltage circuit breaker with a two-armed contact lever |
| DE8807222U1 (en) * | 1988-06-03 | 1989-10-05 | Klöckner-Moeller Elektrizitätsgesellschaft mbH, 5300 Bonn | Circuit breaker with arc limiting device |
-
1993
- 1993-10-05 FR FR9311939A patent/FR2711012B1/en not_active Expired - Fee Related
-
1994
- 1994-09-26 EP EP94410082A patent/EP0646938A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1446692A (en) * | 1964-11-23 | 1966-07-22 | Stotzkontakt G M B H | Arc extinguishing chamber, in particular with deionization plates |
| FR2133596A1 (en) * | 1971-04-01 | 1972-12-01 | Westinghouse Electric Corp | |
| US3801760A (en) * | 1972-08-23 | 1974-04-02 | Gen Electric | Electric circuit breaker or the magnetic blowout type |
| EP0018454A1 (en) * | 1977-10-04 | 1980-11-12 | Dorman Smith Switchgear Limited | Electric circuit breaker |
| EP0174904A1 (en) * | 1984-08-23 | 1986-03-19 | Siemens Aktiengesellschaft | Contact device for a low voltage circuit breaker with a two-armed contact lever |
| DE8807222U1 (en) * | 1988-06-03 | 1989-10-05 | Klöckner-Moeller Elektrizitätsgesellschaft mbH, 5300 Bonn | Circuit breaker with arc limiting device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002041439A1 (en) * | 2000-11-16 | 2002-05-23 | Moeller Gmbh | Contact arrangement for current-limiting protective circuit breakers |
| WO2008071320A2 (en) | 2006-12-14 | 2008-06-19 | Ids-Technology Gmbh | Electrical switch with a contact element mounted such that it can rotate |
| WO2008071320A3 (en) * | 2006-12-14 | 2008-09-25 | Viktor Kruetten | Electrical switch with a contact element mounted such that it can rotate |
| RU2444080C2 (en) * | 2006-12-14 | 2012-02-27 | АйДиЭс-ТЕКНОЛОДЖИ ГМБХ | Electric breaker with contact element installed as capable of rotation |
| CN101595544B (en) * | 2006-12-14 | 2013-07-24 | Ids技术有限公司 | Electrical switch with a contact element mounted such that it can rotate |
| US8592707B2 (en) | 2006-12-14 | 2013-11-26 | Ids-Technology Gmbh | Electrical switch with a contact element mounted such that it can rotate |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2711012A1 (en) | 1995-04-14 |
| FR2711012B1 (en) | 1995-11-24 |
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