EP2894646A1 - Electrical contact device and low-voltage unipolar phase unit including such an electrical contact device - Google Patents
Electrical contact device and low-voltage unipolar phase unit including such an electrical contact device Download PDFInfo
- Publication number
- EP2894646A1 EP2894646A1 EP15150739.9A EP15150739A EP2894646A1 EP 2894646 A1 EP2894646 A1 EP 2894646A1 EP 15150739 A EP15150739 A EP 15150739A EP 2894646 A1 EP2894646 A1 EP 2894646A1
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- EP
- European Patent Office
- Prior art keywords
- contact
- contact surface
- electrical
- movable
- spherical
- 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
Links
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 238000013475 authorization Methods 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000002242 deionisation method Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000012550 audit Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 235000010603 pastilles Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
- H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective 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
- H01H73/02—Details
- H01H73/04—Contacts
- H01H73/045—Bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
- H01H1/10—Laminated contacts with divided contact surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2205/00—Movable contacts
- H01H2205/016—Separate bridge contact
Definitions
- the present invention relates to an electrical contact device forming part of an electrical interruption device capable of allowing or interrupting the passage of an electric current and a low-voltage unipolar breaking block incorporating such an electrical contact device.
- the invention finds particular application in multipole low-voltage electrical switchgear devices constituted by assembling unipolar breaking blocks, electrically connected to a trip unit that may comprise magnetothermic or electronic means.
- This electrical switching device comprises at least one unipolar breaking block, and preferably three unipolar breaking blocks, each unipolar breaking block being connected to a trigger block at a downstream connection pad.
- Each unipolar cutoff block also includes an upstream connection pad, allowing it to be connected to a power line.
- Such a unipolar breaking block comprises a housing comprising a movable contact bridge comprising at each end a contact surface, a pair of fixed contacts, each fixed contact cooperating with the movable contact bridge and being connected to a supply lead of Electric power.
- the contact surfaces of the movable contact bridge are respectively arranged on contact pads.
- the contact pads play an important role, because they must make good electrical contact in normal operation at rated current, while being robust to wear.
- the document DE4204641 discloses a contact pad having a spherical contact surface, so as to control the position of the contact point with an electrical contact, thereby making contact with good mechanical and electrical performance.
- the invention aims to provide an improved contact device in case of arcing, while maintaining very good mechanical and electrical contact performance in normal use.
- an electrical contact device forming part of an electrical interruption device capable of allowing or interrupting the passage of an electric current, comprising at least one mobile support and one contact pad mounted on the movable support, the movable support being able to evolve to position the contact pad in contact with a fixed contact surface connected to an electrical conductor, the contact pad comprising a contact surface intended to collaborate with said fixed contact area.
- This electrical contact device is remarkable in that said contact surface of the contact pad comprises a first portion of spherical shape, comprising a zone of effective contact with said fixed contact surface in the current passage authorization position, and , in continuity with the first portion in spherical shape, a second convex portion of variable shape ranging from spherical to cylindrical.
- the first portion of spherical shape of the contact patch makes it possible to achieve a centering of the effective point of contact, and to guarantee good mechanical and electrical endurance performance.
- the contact pad comprises, in continuity with the first portion in spherical shape, a second portion of variable area ranging from spherical to cylindrical, which allows a faster circulation of an electric arc formed to the outside of the contact patch.
- the movable contact bridge of this unipolar break block comprises a contact device as briefly described above.
- the unipolar breaking block comprises a pair of fixed contacts each fixed contact cooperating with the movable contact bridge.
- the movable contact bridge comprises two support arms, each support arm having a rounded end adapted to move in a cutoff gas evacuation chamber.
- the figure 1 represents an example of a cutoff electrical apparatus 2 according to an exploded perspective representation, comprising three unipolar cutoff blocks 4.
- the switching device may comprise one, two, three or four unipolar breaking blocks.
- Each unipolar break block 4 allows the cutting of a single pole.
- Each cutoff block is in the form of a flat housing 6, for example made of molded plastic, formed of two large parallel faces 8, spaced apart by a thickness of about 23 millimeters (mm) for a 160 Ampere gauge ( AT).
- the housing is preferably formed of two mirror symmetrical parts, secured by any suitable means.
- Each unipolar breaking block 4 is connected to a trip block 10, which comprises magnetothermal or electronic means, at a downstream connection pad 12 (see FIG. figure 2 ) and on the other hand to a current line to be protected at an upstream contact pad 14.
- the unipolar breaking blocks are assembled via spacers 16, which are for example plastic molded, and comprise a central partition 18 intended to be parallel to the large faces 8 of the unipolar cutoff blocks 4.
- the clamping of the spacers 16 one on the other is improved by bottom edges 20.
- the unipolar cutoff blocks are intended to be driven simultaneously and coupled for this purpose by at least one rod 22.
- One of the unipolar cutoff blocks includes a handle 24, adapted to be housed in the nose 26 of the device, and to control a mechanism 28 for actuating the electrical contacts.
- the figure 2 illustrates in more detail the contact device or cut-off 30 housed in the housing 6, according to an embodiment in which it is a rotary double-cut mechanism, suitable for applications up to 800 A.
- the breaking device 30 comprises a movable contact bridge 32 comprising, in the embodiment of the figure 2 , two symmetrical rotating arms 33, 35, and at each end of the support formed by a rotating arm 33, 35, a movable contact surface 34, 36 movable. It comprises a pair of fixed contacts 38, 40, each fixed contact 38, 40 having a fixed contact surface intended to cooperate with a movable contact surface 34, 36 of the movable contact bridge 32.
- the contact surfaces 34, 36 of the movable contact bridge 32 are respectively arranged on contact pads 60 and 62.
- the contact pads 60 and 62 are fixed to the ends of each rotation arm 33, 35 of the movable contact bridge 32 by a sintering method.
- the moving contact surfaces 34, 36 then develop on one of the faces of the contact pads 60, 62.
- a first fixed contact 38 is intended to be connected to the current line by the upstream connection pad 14.
- a second fixed contact 40 is intended to be connected to the trigger block 10 via the downstream connection pad 12.
- the contact surfaces of the fixed contacts 38, 40 are planar in this embodiment.
- the movable contact bridge 32 is mounted between an open position in which the movable contact surfaces 34, 36 are spaced apart from the fixed contacts 38, 40 and a closed position, which is a passing position for the electric current, represented in FIG. the figure 2 in which the movable contact surfaces 34, 36 are in contact with each of the contact surfaces of the fixed contacts 38, 40.
- the unipolar breaking block 4 comprises two arc cutting chambers 42 for extinguishing electric arcs.
- Each arc cutting chamber 42 comprises at at least one stack of at least two deionization fins 44 separated from each other by a cutoff gas exchange space.
- Each arc cutting chamber 42 comprises at least one outlet connected to at least one exhaust channel 46 of the cutoff gases, intended to evacuate the gases through at least one opening 48.
- the movable contact bridge 32 is rotatable about an axis of rotation Y.
- the movable contact bridge 32 is mounted floating in a rotary bar 50 interposed between the two lateral faces 8 of the housing 6, by via connecting elements 52.
- At least one exhaust channel 46 comprises a rotary valve 54 intended to be rotated by the passage of the cutoff gases.
- the rotary valve 54 is rotated about an axis substantially perpendicular to the exhaust channel 46.
- the rotation of a first obstruction position to a second release position is intended to release the actuating mechanism 28 to cause the opening of the movable contact surfaces 34, 36.
- Each contact pad 60, 62 is preferably silver so as to make electrical contact between a movable contact surface 34, 36 of the movable contact bridge 32 and a contact surface of a fixed contact 38, 40.
- the contact pad 62 is integrated with the free end of the rotation arm 35 so as to provide continuity between the contact surface 36 of the contact pad 62 and the end rounded 65 of the rotation arm 35.
- the contact surface 36 of the contact pad 62 is formed according to a particular geometry combining a first portion of spherical shape 66 at the level of the contact zone and a second portion 68 convex, moving outwardly of the contact surface, thus away from the axis of rotation Y of the movable contact bridge 32, to a cylindrical shape.
- the "zone of contact Z" defines the zone of the movable contact surface 36 which is really in contact with the contact surface of the fixed contact 40.
- the contact surface 36 is surrounded by substantially parallel edges, a first inner edge 67 and a second outer edge 69.
- the first portion 66 extends over one half of the contact surface 36, between the first inner edge 67 of the support and a central line L parallel to the first edge 67 and passing through the center C of the contact surface 36.
- the second portion 68 extends over the other half of the contact surface 36, between the central line L and the second outer edge 69.
- the characteristics of the portions 66 and 68 are determined so that each occupies about 50% of the contact area.
- the contact surface 36 is made during the welding of the contact pad 62 to the support of the rotation arm 35.
- the contact surface 36 is made by a combination of sintering and soldering by current flow.
- the contact zone Z is positioned so that the repeated contacts induce regular wear of the parts 62, 40 and guarantee good mechanical and electrical endurance of the contact.
- the embodiment of the second portion 68 makes it possible to obtain a substantially perfect continuity between the contact pad 62 and the support of the rotating arm carrying the contact pad, which allows an optimized circulation of an electric arc.
- the outside of the movable contact bridge 32 is here referred to as the zones outside the ends of the rotation arms 33, 35 opposite to the axis of rotation Y.
- FIG. 6 to 8 illustrate several steps of opening the movable contact bridge 32 illustrated in FIG. figure 3 .
- an electric arc 70, 72 is formed between the movable contact pad 60, 62 and the fixed contact 38, 40.
- each contact surface 34, 36 and in particular of its second convex portion 68 in continuity with a cylindrical shape the electric arc 70, 72 moves towards the outside of the movable contact bridge 32 to level of each arm of rotation ( figure 7 ), until a complete evacuation towards the breaking chambers 42 at the level of the deionization fins 44, by the external edges of the rotation arms 33, 35 ( figure 8 ).
- the invention has been described above in a particular embodiment, the contact device being implemented in a unipolar breaking block having a particular structure.
- the invention finds application in any electrical switchgear, when there is a need to maintain good mechanical and electrical contact performance in normal use, while facilitating the elimination of electric arc to a zone external surface of the support of the contact pad.
Abstract
L'invention concerne un dispositif de contact électrique faisant partie d'un dispositif d'interruption électrique apte à autoriser ou à interrompre le passage d'un courant électrique, comprenant au moins un support mobile (33, 35) et une pastille de contact (60, 62) montée sur le support mobile (33, 35), le support mobile (33, 35) étant apte à évoluer pour positionner la pastille de contact (60, 62) en contact avec une surface de contact fixe (38, 40) reliée à un conducteur électrique, la pastille de contact (60, 62) comprenant une surface de contact (34, 36) destinée à collaborer avec ladite surface de contact fixe (38, 40). La surface de contact (34, 36) de la pastille de contact (60, 62) comprend une première portion de forme sphérique, comprenant une zone de contact effectif avec ladite surface de contact fixe (38, 40) en position d'autorisation de passage de courant, et, en continuité de la première portion en forme sphérique, une deuxième portion convexe de forme variable allant de sphérique à cylindrique. L'invention concerne également un bloc de coupure unipolaire basse tension comprenant un tel dispositif de contact électrique.The invention relates to an electrical contact device forming part of an electrical interruption device able to allow or interrupt the passage of an electric current, comprising at least one mobile support (33, 35) and a contact pad ( 60, 62) mounted on the movable support (33, 35), the movable support (33, 35) being able to evolve to position the contact pad (60, 62) in contact with a fixed contact surface (38, 40). ) connected to an electrical conductor, the contact patch (60, 62) comprising a contact surface (34, 36) for collaborating with said fixed contact surface (38, 40). The contact surface (34, 36) of the contact pad (60, 62) comprises a first spherical portion, comprising an area of effective contact with said stationary contact surface (38, 40) in the clearance position of passage of current, and, in continuity with the first spherical portion, a second convex portion of variable shape ranging from spherical to cylindrical. The invention also relates to a low-voltage unipolar breaking block comprising such an electrical contact device.
Description
La présente invention concerne un dispositif de contact électrique faisant partie d'un dispositif d'interruption électrique apte à autoriser ou à interrompre le passage d'un courant électrique et un bloc de coupure unipolaire basse tension intégrant un tel dispositif de contact électrique.The present invention relates to an electrical contact device forming part of an electrical interruption device capable of allowing or interrupting the passage of an electric current and a low-voltage unipolar breaking block incorporating such an electrical contact device.
Elle se situe dans le domaine des appareils de coupure basse tension, et en particulier dans le domaine de l'amélioration de l'interruption de courant électrique, notamment lors de la survenue d'arcs électriques.It is located in the field of low voltage switchgear, and in particular in the field of improving the interruption of electric current, especially during the occurrence of arcing.
L'invention trouve une application particulière dans des appareils électriques de coupure basse tension multipolaires constitués par assemblage de blocs de coupure unipolaires, raccordés électriquement à un bloc de déclenchement pouvant comporter des moyens magnétothermiques ou électroniques.The invention finds particular application in multipole low-voltage electrical switchgear devices constituted by assembling unipolar breaking blocks, electrically connected to a trip unit that may comprise magnetothermic or electronic means.
Il existe divers modèles de tels appareils électriques de coupure modulaires.There are various models of such modular electrical break devices.
Un tel appareil de coupure électrique est décrit par exemple dans la demande de brevet
Un tel bloc de coupure unipolaire comprend un boîtier comprenant un pont de contacts mobiles comportant à chaque extrémité une surface de contact, une paire de contacts fixes, chaque contact fixe coopérant avec le pont de contacts mobile et étant relié à un conducteur d'amenée de courant électrique. Les surfaces de contact du pont de contacts mobiles sont respectivement disposées sur des pastilles de contact.Such a unipolar breaking block comprises a housing comprising a movable contact bridge comprising at each end a contact surface, a pair of fixed contacts, each fixed contact cooperating with the movable contact bridge and being connected to a supply lead of Electric power. The contact surfaces of the movable contact bridge are respectively arranged on contact pads.
Les pastilles de contact jouent un rôle important, car elles doivent réaliser un bon contact électrique en fonctionnement normal sous courant nominal, tout en étant robustes à l'usure.The contact pads play an important role, because they must make good electrical contact in normal operation at rated current, while being robust to wear.
Le document
Cependant, une telle pastille de contact ne montre pas de performance suffisante en ce qui concerne l'élimination d'arc électrique pouvant se produire lors de l'ouverture du contact.However, such a contact patch does not show sufficient performance with regard to the elimination of electric arc that can occur during the opening of the contact.
L'invention a pour objectif de proposer un dispositif de contact amélioré en cas de survenue d'arc électrique, tout en maintenant de très bonnes performances mécaniques et électriques de contact en utilisation normale.The invention aims to provide an improved contact device in case of arcing, while maintaining very good mechanical and electrical contact performance in normal use.
A cet effet, l'invention propose selon un premier aspect, un dispositif de contact électrique faisant partie d'un dispositif d'interruption électrique apte à autoriser ou à interrompre le passage d'un courant électrique, comprenant au moins un support mobile et une pastille de contact montée sur le support mobile, le support mobile étant apte à évoluer pour positionner la pastille de contact en contact avec une surface de contact fixe reliée à un conducteur électrique, la pastille de contact comprenant une surface de contact destinée à collaborer avec ladite surface de contact fixe. Ce dispositif de contact électrique est remarquable en ce que ladite surface de contact de la pastille de contact comprend une première portion de forme sphérique, comprenant une zone de contact effectif avec ladite surface de contact fixe en position d'autorisation de passage de courant, et, en continuité de la première portion en forme sphérique, une deuxième portion convexe de forme variable allant de sphérique à cylindrique.For this purpose, the invention proposes according to a first aspect, an electrical contact device forming part of an electrical interruption device capable of allowing or interrupting the passage of an electric current, comprising at least one mobile support and one contact pad mounted on the movable support, the movable support being able to evolve to position the contact pad in contact with a fixed contact surface connected to an electrical conductor, the contact pad comprising a contact surface intended to collaborate with said fixed contact area. This electrical contact device is remarkable in that said contact surface of the contact pad comprises a first portion of spherical shape, comprising a zone of effective contact with said fixed contact surface in the current passage authorization position, and , in continuity with the first portion in spherical shape, a second convex portion of variable shape ranging from spherical to cylindrical.
Avantageusement, la première portion de forme sphérique de la pastille de contact permet de réaliser un centrage du point effectif de contact, et de garantir de bonnes performances d'endurance mécanique et électrique. En outre, la pastille de contact comprend, en continuité de la première portion en forme sphérique, une deuxième portion de surface variable allant de sphérique à cylindrique, ce qui permet une circulation plus rapide d'un arc électrique formé vers l'extérieur de la pastille de contact.Advantageously, the first portion of spherical shape of the contact patch makes it possible to achieve a centering of the effective point of contact, and to guarantee good mechanical and electrical endurance performance. In addition, the contact pad comprises, in continuity with the first portion in spherical shape, a second portion of variable area ranging from spherical to cylindrical, which allows a faster circulation of an electric arc formed to the outside of the contact patch.
La pastille de contact électrique selon l'invention peut également présenter une ou plusieurs des caractéristiques ci-dessous :
- le support mobile comporte une extrémité arrondie et la deuxième portion convexe est formée en continuité de ladite extrémité arrondie ;
- la première portion sphérique s'étend sur une moitié de la surface de contact, entre un premier bord intérieur du support mobile et une ligne centrale sensiblement parallèle audit premier bord, et la deuxième portion s'étend sur l'autre moitié de la surface de contact, la surface de ladite deuxième portion étant variable de sphérique à cylindrique entre ladite ligne centrale et un deuxième bord extérieur du support mobile.
- the movable support has a rounded end and the second convex portion is formed in continuity with said rounded end;
- the first spherical portion extends over one half of the contact surface, between a first inner edge of the movable support and a central line substantially parallel to said first edge, and the second portion extends over the other half of the surface of the contact, the surface of said second portion being variable from spherical to cylindrical between said central line and a second outer edge of the movable support.
Selon un deuxième aspect, l'invention concerne un bloc de coupure unipolaire basse tension comprenant un boîtier, et, dans ledit boîtier :
- un pont de contacts mobile comportant au moins une surface de contact,
- au moins un contact fixe coopérant avec le pont de contacts mobile et étant relié à un conducteur d'amenée de courant électrique.
- a movable contact bridge having at least one contact surface,
- at least one fixed contact cooperating with the movable contact bridge and being connected to an electric current supply conductor.
Le que le pont de contacts mobile de ce bloc de coupure unipolaire comprend un dispositif de contact tel que brièvement décrit ci-dessus.The movable contact bridge of this unipolar break block comprises a contact device as briefly described above.
Selon une caractéristique, le bloc de coupure unipolaire comprend une paire de contacts fixes chaque contact fixe coopérant avec le pont de contacts mobile.According to one characteristic, the unipolar breaking block comprises a pair of fixed contacts each fixed contact cooperating with the movable contact bridge.
Selon une caractéristique, le pont de contact mobile comprend deux bras de support, chaque bras de support comportant une extrémité arrondie apte à se déplacer dans une chambre d'évacuation de gaz de coupure.According to one characteristic, the movable contact bridge comprises two support arms, each support arm having a rounded end adapted to move in a cutoff gas evacuation chamber.
D'autres caractéristiques et avantages de l'invention ressortiront de la description qui en est donnée ci-dessous, à titre indicatif et nullement limitatif, en référence aux figures annexées, parmi lesquelles :
- la
figure 1 représente une vue éclatée en perspective d'un appareil de coupure comportant des blocs de coupure unipolaires et un bloc de déclenchement selon l'invention ; - la
figure 2 représente une vue en coupe de l'intérieur d'un bloc de coupure unipolaire selon l'invention; - les
figures 3 et4 représentent des détails d'un dispositif de contact selon un mode de réalisation de l'invention ; - la
figure 5 illustre un mode de réalisation de la surface de contact d'une pastille de contact ; - les
figures 6 à 8 illustrent le fonctionnement d'un bloc de coupure unipolaire selon un mode de réalisation de l'invention.
- the
figure 1 is an exploded perspective view of a switchgear comprising unipolar break blocks and a tripping block according to the invention; - the
figure 2 is a sectional view of the interior of a unipolar break block according to the invention; - the
figures 3 and4 represent details of a contact device according to one embodiment of the invention; - the
figure 5 illustrates an embodiment of the contact surface of a contact pad; - the
Figures 6 to 8 illustrate the operation of a unipolar break block according to one embodiment of the invention.
La
Selon d'autres modes de réalisation non représentés, l'appareil de coupure peut comporter un, deux, trois ou quatre blocs de coupure unipolaires.According to other embodiments not shown, the switching device may comprise one, two, three or four unipolar breaking blocks.
Chaque bloc de coupure unipolaire 4 permet la coupure d'un seul pôle. Chaque bloc de coupure se présente sous forme d'un boîtier plat 6, par exemple en plastique moulé, formé de deux grandes faces parallèles 8, distantes d'une épaisseur de l'ordre de 23 millimètres (mm) pour un calibre 160 Ampères (A). Le boîtier est de préférence formé de deux parties symétriques en miroir, solidarisées par tout moyen adapté.Each
Chaque bloc de coupure unipolaire 4 est raccordé à un bloc de déclenchement 10, qui comporte des moyens magnétothermiques ou électroniques, au niveau d'une plage de raccordement aval 12 (voir
Dans le mode de réalisation illustré à la
Les blocs unipolaires de coupure sont destinés à être entraînés simultanément et couplés à cette fin par au moins une tige 22.The unipolar cutoff blocks are intended to be driven simultaneously and coupled for this purpose by at least one
Un des blocs unipolaires de coupure comporte une manette 24, apte à se loger dans le nez 26 de l'appareil, et à commander un mécanisme 28 d'actionnement des contacts électriques.One of the unipolar cutoff blocks includes a
La
Le dispositif de coupure 30 comprend un pont de contacts mobile 32 comportant, dans le mode de réalisation de la
Selon le mode de réalisation représenté sur la
Un premier contact fixe 38 est destiné à être raccordé à la ligne de courant par la plage de raccordement amont 14. Un second contact fixe 40 est destiné à être relié au bloc de déclenchement 10 par la plage de raccordement aval 12.A first fixed
Les surfaces de contact des contacts fixes 38, 40 sont planes dans ce mode de réalisation.The contact surfaces of the
Le pont de contacts mobile 32 est monté entre une position d'ouverture dans laquelle les surfaces de contact 34, 36 mobiles sont écartées des contacts fixes 38, 40 et une position de fermeture, qui est une position passante pour le courant électrique, représentée à la
Le bloc de coupure unipolaire 4 comporte deux chambres de coupure d'arc 42 pour l'extinction des arcs électriques. Chaque chambre de coupure d'arc 42 comprend au moins un empilement d'au moins deux ailettes de désionisation 44 séparées les unes des autres par un espace d'échange de gaz de coupure.The
Chaque chambre de coupure d'arc 42 comporte au moins une sortie reliée à au moins un canal d'échappement 46 des gaz de coupure, destiné à évacuer les gaz par au moins un orifice débouchant 48.Each
Selon un mode de réalisation particulier, le pont de contacts mobile 32 est rotatif autour d'un axe de rotation Y. Le pont de contacts mobile 32 est monté flottant dans un barreau rotatif 50 intercalé entre les deux faces latérales 8 du boîtier 6, par l'intermédiaire d'éléments de liaison 52.According to a particular embodiment, the
Au moins un canal d'échappement 46 comporte un clapet rotatif 54 destiné à être entraîné en rotation par le passage des gaz de coupure. Le clapet rotatif 54 est entraîné en rotation autour d'un axe sensiblement perpendiculaire au canal d'échappement 46. La rotation d'une première position d'obstruction vers une seconde position de déclenchement est destinée à libérer le mécanisme d'actionnement 28 pour provoquer l'ouverture des surfaces de contact 34, 36 mobiles.At least one
Chaque pastille de contact 60, 62 est de préférence en argent de manière à réaliser un contact électrique entre une surface de contact mobile 34, 36 du pont de contact mobile 32 et une surface de contact d'un contact fixe 38, 40.Each
Il est à noter que dans le mode de réalisation de la
Seule une pastille de contact 62 sera décrite ci-après en référence aux
Selon le mode de réalisation préféré de l'invention, la pastille de contact 62 est intégrée à l'extrémité libre du bras de rotation 35 de manière à réaliser une continuité entre la surface de contact 36 de la pastille de contact 62 et l'extrémité arrondie 65 du bras de rotation 35.According to the preferred embodiment of the invention, the
Avantageusement, la surface de contact 36 de la pastille de contact 62 selon l'invention est formée selon une géométrie particulière alliant une première portion de forme sphérique 66 au niveau de la zone de contact et une deuxième portion 68 convexe, évoluant vers l'extérieur de la surface de contact, donc en s'éloignant de l'axe de rotation Y du pont de contacts mobile 32, vers une forme cylindrique. On définit par « la zone de contact Z » la zone de la surface de contact mobile 36 qui est véritablement en contact avec la surface de contact du contact fixe 40.Advantageously, the
La surface de contact 36 est entourée de bords sensiblement parallèles, un premier bord intérieur 67 et un deuxième bord extérieur 69.The
Dans le mode de réalisation illustré, la première portion 66 s'étend sur une moitié de la surface de contact 36, entre le premier bord intérieur 67 du support et une ligne centrale L parallèle au premier bord 67 et passant par le centre C de la surface de contact 36.In the illustrated embodiment, the
La deuxième portion 68 s'étend sur l'autre moitié de la surface de contact 36, entre la ligne centrale L et le deuxième bord extérieur 69.The
Les caractéristiques des portions 66 et 68 sont déterminées de manière à ce que chacune occupe environ 50% de la surface de contact.The characteristics of the
La surface de contact 36 est réalisée pendant la soudure de la pastille de contact 62 au support du bras de rotation 35.The
En variante, la surface de contact 36 est réalisée par une combinaison de frittage et de soudure par passage de courant.In a variant, the
Avantageusement, la zone de contact Z est positionnée de manière à ce que les contacts répétés induisent une usure régulière des pièces 62, 40 et garantissent une bonne endurance mécanique et électrique du contact.Advantageously, the contact zone Z is positioned so that the repeated contacts induce regular wear of the
En outre, avantageusement, la réalisation de la deuxième portion 68 permet d'obtenir une continuité sensiblement parfaite entre la pastille de contact 62 et le support du bras de rotation portant la pastille de contact, ce qui permet une circulation optimisée d'un arc électrique vers la chambre d'évacuation 42, et plus généralement vers l'extérieur du pont de contacts mobile 32 lors de l'ouverture des contacts, comme illustré plus en détail aux
Les
Comme illustré à la
En particulier, grâce à la forme de chaque surface de contact 34, 36 et notamment de sa deuxième portion convexe 68 en continuité avec une forme cylindrique, l'arc électrique 70, 72 se déplace vers l'extérieur du pont de contacts mobile 32 au niveau de chaque bras de rotation (
L'invention a été décrite ci-dessus dans un mode de réalisation particulier, le dispositif de contact étant implémenté dans un bloc de coupure unipolaire ayant une structure particulière.The invention has been described above in a particular embodiment, the contact device being implemented in a unipolar breaking block having a particular structure.
Cependant, l'invention trouve une application dans tout appareil de coupure électrique, dès lors qu'il existe un besoin de maintenir de bonnes performances mécaniques et électriques de contact en utilisation normale, tout en facilitant l'élimination d'arc électrique vers une zone extérieure donnée du support de la pastille de contact.However, the invention finds application in any electrical switchgear, when there is a need to maintain good mechanical and electrical contact performance in normal use, while facilitating the elimination of electric arc to a zone external surface of the support of the contact pad.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1450225A FR3016472B1 (en) | 2014-01-13 | 2014-01-13 | ELECTRIC CONTACT DEVICE AND LOW VOLTAGE UNIPOLAR CUT-OFF BLOCK INCORPORATING AN ELECTRICAL CONTACT DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2894646A1 true EP2894646A1 (en) | 2015-07-15 |
EP2894646B1 EP2894646B1 (en) | 2016-07-06 |
Family
ID=50729605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15150739.9A Active EP2894646B1 (en) | 2014-01-13 | 2015-01-12 | Electrical contact device and low-voltage unipolar phase unit including such an electrical contact device |
Country Status (6)
Country | Link |
---|---|
US (1) | US9666383B2 (en) |
EP (1) | EP2894646B1 (en) |
CN (1) | CN104779082B (en) |
ES (1) | ES2594131T3 (en) |
FR (1) | FR3016472B1 (en) |
PL (1) | PL2894646T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD866470S1 (en) * | 2016-04-22 | 2019-11-12 | Phoenix Contact Gmbh & Co. Kg | Electrical connector |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0540431A1 (en) * | 1991-10-29 | 1993-05-05 | Schneider Electric Sa | Handling mechanism for tetrapolar circuit breaker |
DE4204641A1 (en) | 1992-02-15 | 1993-08-19 | Hella Kg Hueck & Co | Electric contact for switch device e.g. electromagnetic relay - has convex curved surface with top of curve displaced from middle of surface by predetermined amount |
EP1085552A1 (en) * | 1999-09-16 | 2001-03-21 | General Electric Company | Improved arcing contact arrangement |
FR2861891A1 (en) * | 2003-10-31 | 2005-05-06 | Valeo Equip Electr Moteur | CONTACTING DEVICE OF A CONTACTOR FOR AN ELECTRIC STARTER |
FR2986659A1 (en) | 2012-02-02 | 2013-08-09 | Schneider Electric Ind Sas | Unipolar cut off block i.e. ampoule for use in tripolar circuit breaker, has axle fixed at sidewalls of discharge channel to divide rotative valve into non-symmetrical surfaces that are moved to release position to release bypass sections |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5716222A (en) * | 1995-11-03 | 1998-02-10 | Advanced Interconnections Corporation | Ball grid array including modified hard ball contacts and apparatus for attaching hard ball contacts to a ball grid array |
CN202042382U (en) * | 2011-05-17 | 2011-11-16 | 上海电科电工材料有限公司 | Composite contact for small-size contactor |
CN102655066A (en) * | 2012-03-31 | 2012-09-05 | 温州奥来电器有限公司 | High-breaking-capacity energy-storage-type biaxial miniature circuit breaker |
-
2014
- 2014-01-13 FR FR1450225A patent/FR3016472B1/en not_active Expired - Fee Related
-
2015
- 2015-01-08 US US14/592,218 patent/US9666383B2/en active Active
- 2015-01-12 PL PL15150739.9T patent/PL2894646T3/en unknown
- 2015-01-12 ES ES15150739.9T patent/ES2594131T3/en active Active
- 2015-01-12 EP EP15150739.9A patent/EP2894646B1/en active Active
- 2015-01-13 CN CN201510015418.4A patent/CN104779082B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0540431A1 (en) * | 1991-10-29 | 1993-05-05 | Schneider Electric Sa | Handling mechanism for tetrapolar circuit breaker |
DE4204641A1 (en) | 1992-02-15 | 1993-08-19 | Hella Kg Hueck & Co | Electric contact for switch device e.g. electromagnetic relay - has convex curved surface with top of curve displaced from middle of surface by predetermined amount |
EP1085552A1 (en) * | 1999-09-16 | 2001-03-21 | General Electric Company | Improved arcing contact arrangement |
FR2861891A1 (en) * | 2003-10-31 | 2005-05-06 | Valeo Equip Electr Moteur | CONTACTING DEVICE OF A CONTACTOR FOR AN ELECTRIC STARTER |
FR2986659A1 (en) | 2012-02-02 | 2013-08-09 | Schneider Electric Ind Sas | Unipolar cut off block i.e. ampoule for use in tripolar circuit breaker, has axle fixed at sidewalls of discharge channel to divide rotative valve into non-symmetrical surfaces that are moved to release position to release bypass sections |
Also Published As
Publication number | Publication date |
---|---|
FR3016472A1 (en) | 2015-07-17 |
ES2594131T3 (en) | 2016-12-15 |
US9666383B2 (en) | 2017-05-30 |
EP2894646B1 (en) | 2016-07-06 |
PL2894646T3 (en) | 2016-12-30 |
CN104779082A (en) | 2015-07-15 |
FR3016472B1 (en) | 2016-02-05 |
CN104779082B (en) | 2019-02-22 |
US20150200060A1 (en) | 2015-07-16 |
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