EP0542636B1 - Multipole circuit-breaker being composed of single-pole units - Google Patents

Multipole circuit-breaker being composed of single-pole units Download PDF

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Publication number
EP0542636B1
EP0542636B1 EP92420356A EP92420356A EP0542636B1 EP 0542636 B1 EP0542636 B1 EP 0542636B1 EP 92420356 A EP92420356 A EP 92420356A EP 92420356 A EP92420356 A EP 92420356A EP 0542636 B1 EP0542636 B1 EP 0542636B1
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EP
European Patent Office
Prior art keywords
circuit breaker
box
breaker according
connecting bars
pole
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.)
Expired - Lifetime
Application number
EP92420356A
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German (de)
French (fr)
Other versions
EP0542636A1 (en
Inventor
Philippe Perrier
Jean-Pierre Nereau
Robert Morel
Jean-Pierre Nebon
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Schneider Electric SE
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Schneider Electric SE
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H01H2071/1036—Interconnected mechanisms having provisions for four or more poles
    • 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
    • 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a low-voltage, double-jacketed, multipolar circuit breaker, each pole of which comprises, a single-pole breaking block having a parallelepiped box with two large side faces, made of molded plastic, and fixed and mobile contacts associated with a chamber cut-out and housed in said block, several blocks being mounted side by side in a molded case to form the multipole circuit breaker, the movable contact being arranged in the form of a rotary contact bridge cooperating with two opposite fixed contacts, being carried by a section of rotary bar, which extends transversely substantially at the center of said box while being inserted and guided laterally by the two large lateral faces of the box while being able to struggle in limited translation parallel to these large faces.
  • a circuit breaker of the type mentioned (see for example FR-A-2 622 347 & EP-A-0 314 540), comprises for each pole an individual block constituted by a bulb, in this case by a molded plastic box containing the contacts and the breaking chambers.
  • the advantages of such modular systems are well known, in particular the reduction in manufacturing and assembly costs. They nevertheless impose constraints on the respective positioning of the different modules, in this case of connection between the moving parts of the different unipolar blocks.
  • a known circuit breaker comprises a rotary shaft which crosses all of the unipolar blocks to drive, in simultaneous rotation, the movable contacts of these blocks. The presence of this rotating shaft imposes constraints on positioning and architecture.
  • the object of the present invention is to produce a multipole circuit breaker, of the modular type, having a mechanical connection between the unipolar blocks compatible with the use of a contact bridge.
  • the circuit breaker according to the invention is characterized in that the sections of bars of the various juxtaposed blocks are mechanically secured by two parallel connecting bars which extend perpendicularly to said large faces and pass through diametrically opposite orifices, made with little play, formed in successive bar sections, that the two connecting bars are coupled to a crank with two diametrically opposite arms, that said two large lateral faces each have two curved openings for the passage with clearance and the clearance of said two connecting bars and that a control mechanism, fixed to the upper part of one of the blocks , comprises two metal flanges carrying the bearings of said crank and a lower connecting rod actuating said crank.
  • Each unipolar block constitutes a breaking assembly housed in an insulating envelope in the form of a box, and these blocks are grouped in a second envelope constituted by the casing of the multipolar circuit breaker.
  • the contact bridge of each unipolar block is mounted floating on a section of bar and the rigid mechanical connection between the different sections of bar, is carried out by the two bars which extend parallel to the bar, and are offset from the axis of rotation of the latter.
  • the bar section is positioned in the axial direction by the two large faces of the box which frame it, but it is free to move in the other directions to compensate for manufacturing or positioning irregularities.
  • the two connecting bars diametrically opposite, rigidly secure the successive sections of bar, while leaving free the central part of the section for the passage of the contact bridge.
  • the large faces of the box have openings in the form of an arc of a circle for passage with a set of connecting bars, the only other openings being those for the exhaust of the cut-off gases at the rear of the chambers.
  • the circuit breaker control mechanism is associated with one of the unipolar blocks, preferably with the central block, and it is arranged to be placed on the upper face of the box by registering in the width of the box.
  • Such a mechanism can, in this case, be used for the entire range of single-pole or multi-pole circuit breakers, which facilitates the manufacture of such a range of circuit breakers.
  • the mechanism is of the lever type, in particular pivoting, and with a toggle for controlling the rotation of a crank with two diametrically opposite arms.
  • One of said connecting bars is coupled to each arm of the crank to rotate the bar sections.
  • the mechanism comprises two lateral flanges, each of which carries a bearing with a crank and these lateral flanges serve as fastening parts to the associated unipolar block, for example using alignment rods, which connect the different unipolar blocks and the spacers.
  • the spacers between two adjacent blocks ensure modularity between circuit breakers of the same range, in this case between a single-pole circuit breaker and a multi-pole circuit breaker, as described in detail in the French patent application filed jointly, and entitled " Range of low voltage circuit breakers with molded case ".
  • the spacer plate has, opposite the curved openings of the large lateral faces of each box, two curved openings centered on the axis of the bar for the passage of the two connecting bars.
  • the bar section of generally cylindrical shape made of an insulating material, comprises on the one hand a diametrical lumen crossed by the contact bridge, and on the other hand two orifices offset angularly and perpendicular to the lumen for the passage without clearance of the bars which are thus electrically isolated from the contact bridge.
  • the curved openings of the large lateral faces are crossed with the eu by the connecting bars which only partially close these openings.
  • the curved lights are capped by the bottom of the bar section facing the large face.
  • the tightness can be improved by inserting between the bottom and the large face a flexible disc secured to the connecting bars which pass through it without play. During an internal overpressure the disc is pressed against the large lateral face by closing the curved openings.
  • the contact bridges of the various modular blocks extend in a plane substantially parallel to the bottom of the housing and each contact bridge, cooopere on the one hand, with a fixed contact located above this plane and on the other hand, on the opposite side with a fixed contact located below this plane.
  • Each fixed contact is connected to a connection pad, and the pad connected to the fixed contact arranged below the plane is close to the front face of the box, while the pad connected to the other fixed contact is in the vicinity from the bottom of the box.
  • This arrangement gives the unipolar block a certain symmetry and facilitates the connection of a trip unit which can either be integrated into the circuit breaker box or be attached to the small side face of the circuit breaker box.
  • the trigger block is common to the different unipolar blocks, but it is conceivable to produce modular systems each associated with one of the unipolar blocks.
  • the trigger block is arranged on the side of the pads on the front face of the unipolar blocks.
  • the modularity of the system facilitates the realization of a range of circuit breakers from a limited number of sub-assemblies.
  • the system is particularly simple and the double envelope, as well as the double cutoff, give it remarkable performance.
  • Figure 1 is a schematic exploded perspective view of a circuit breaker according to the invention.
  • FIG. 2 is a perspective view on an enlarged scale of a single-pole unit and of the associated control mechanism of the circuit breaker according to FIG. 1.
  • Figure 3 is a cross-sectional view of the unipolar block.
  • Figure 4 is an axial sectional view of the bar section, showing the sealing valves.
  • a multipolar circuit breaker with molded housing 10 comprises four unipolar blocks 11 of generally parallelepiped shape, and arranged side by side in the housing 10.
  • Each unipolar block comprises a box 12 of molded plastic having a bottom 13, a front face 14, two large parallel side faces 15,16 and two small parallel faces 17,18.
  • a contact bridge 19 carried by a section of bar 20 extending perpendicularly to the large lateral faces 15, 16.
  • the movable contact bridge 19 cooperates, on one side with a fixed contact 22, and on the opposite side with a fixed contact 23 and on each pair of contacts 19, 22; 19,23 is associated with a breaking chamber 24 with deionization plates.
  • the movable contact bridge 19 is mounted floating on the bar section 20, by means of two opposite springs in the manner described in detail in French Patent No. 2,622,347.
  • the axis of rotation 21 of the contact bridge 19 is substantially in the center of the box 12, and in the closed position the contact bridge 19 extends in a median plane, substantially parallel to the bottom 13 of the box 12.
  • the fixed contact 22 is disposed above this median plane, and is connected to a contact pad 25, near the front face 14, of the box 12.
  • the other contact opposite 23 is arranged below this median plane, and is connected to a track 26 near the bottom 13 of the box 12.
  • the unipolar block 11 is an independent unit constituting, one of the poles of the circuit breaker, and the association of several unipolar blocks allows the production of a multipolar circuit breaker.
  • the unipolar blocks 11 are joined by their large lateral faces 15, 16, with the interposition of a spacer plate 27 defining an interval between the successive blocks.
  • the bar sections 20 of the different unipolar blocks 11 are mechanically connected by two connecting bars 28 which extend parallel to the axis of rotation 21, and which pass without clearance through the orifices 29 formed in the bar sections 20.
  • the bars connecting 28 are eccentric with respect to the axis of rotation 21, and the large lateral faces 15, 16, and the spacer plates 27, have elongated slots 30 of curved shape, allowing the passage with clearance of the connecting bars 28 with a possibility of travel suitable for the rotational movement of the bar sections 20.
  • the bar section 20 in the form of a cylindrical nut made of an insulating material, is framed laterally with little play by the two large faces 15, 16, but it is free to move slightly in the other directions to compensate for manufacturing irregularities or positioning.
  • the contact bridge 19, in the form of a bar, passes through a lumen 33 formed along a diameter in the bar section 20 and this lumen 33 is angularly offset with respect to the orifices 29 for passage of the connecting bars 28 perpendicular to the contact bridge 19 .
  • a mechanism 32 On the front face 14 of one of the central unipolar blocks 11, is fixed a mechanism 32, of a standard type, having a control lever 31 and a toggle.
  • the mechanism 32 comprises two external metal flanges 34, extending in parallel while being spaced apart by a distance corresponding substantially to the width of the unipolar block 11.
  • These flanges 34 are fixed, at their lower part 35, to the unipolar block 11 by alignment rods 37 which extend perpendicular to the large faces 15,16 and pass through aligned orifices 38,39 respectively flanges 34 and boxes 12.
  • Each flange 34 carries a bearing 40 of a crank 42 with axis 41 controlled by the mechanism 32 to perform a limited rotation alternately respectively for the opening and closing of the circuit breaker.
  • Each crank 42 has two opposite arms 43, each crossed without play by one of the connecting bars 28. A rotation of the cranks 42 is transmitted by means of the two bars 28, which struggle in the curved slots 30, to the different bar sections 20 for opening and closing the contacts
  • the mechanism 32 is common to all of the unipolar blocks 11, and this mechanism is housed in the housing 10, only the handle 31 being accessible from the outside for controlling the circuit breaker.
  • the bars 28 constitute a rigid connection between the sections 20 which form a bar articulated by the bearings 40 on the two flanges 34.
  • the imperfections in positioning or manufacturing do not affect the movement of the contact bridge 19 guided by the bar section 20, the latter being mounted with play in the box 12. From standard unipolar blocks 11, it is possible to manufacture a whole range of circuit breakers with molded casing, the double jacket constituted by the box 12 and the casing 10, as well as the floating mounting of the contact bridge 19 guaranteeing remarkable performances of the circuit breaker.
  • the circuit breaker comprises a trip block (not shown) which is either integrated into the housing 10, or attached to the small external face of the latter.
  • the trigger of the electronic or electromechanical type can be common to all the unipolar blocks 11, or possibly be of the modular type, associated with each pole unit 11.
  • At the rear of the switching chambers 24 are provided exhaust openings 44 cut-off gases outside the box 12, the only other openings of the latter being the curved openings 30 for passage of the connecting bars 28.
  • the quasi-tightness of the box 12, in particular in its central part promotes cutting, the arc being blown towards the cutting chambers 34. In with reference to FIG. 4, it can be seen that this sealing is improved by the small clearance between the front part 45 of the bar section 20 and the internal surface of the large face 15, 16.
  • a suspect disc 46 is interposed between the bar section 20 and the large face 15, 16 facing the curved openings 30.
  • the disc 46 operates as a valve coming to be pressed against the faces 15, 16 during an internal overpressure to close off the openings 30.
  • the connecting bars 28 pass through holes made in the disc 46 which moves with these bars with little play.
  • Other sealing means for example with a drawer, can be envisaged.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Distribution Board (AREA)
  • Amplifiers (AREA)

Abstract

A low voltage multipole circuit breaker having a double housing, each pole including a single-pole breaking unit having a parallelepipedic plastic box having two extended side faces. Contacts are further provided and are associated with an extinguishing chamber housed within the single-pole breaking unit. Several units are mounted side by side in the parallelepipedic box to form a multipole circuit breaker.

Description

L'invention est relative à un disjoncteur multipolaire basse tension à double enveloppe, dont chaque pôle comprend, un bloc unipolaire de coupure ayant une boîte parallélélipèdique à deux grandes faces latérales, en matière plastique moulée, et des contacts fixes et mobiles associés à une chambre de coupure et logés dans ledit bloc, plusieurs blocs étant montés côte à côte dans un boîtier moulé pour constituer le disjoncteur multipolaire, le contact mobile étant agencé en forme de pont de contacts rotatif coopèrant avec deux contacts fixes opposés, en étant porté par un tronçon de barreau rotatif, qui s'étend transversalement sensiblement au centre de ladite boîte en étant intercalé et guidé latéralement par les deux grandes faces latérales de la boîte tout en pouvant se débattre en translation limitée parallèlement à ces grandes faces .The invention relates to a low-voltage, double-jacketed, multipolar circuit breaker, each pole of which comprises, a single-pole breaking block having a parallelepiped box with two large side faces, made of molded plastic, and fixed and mobile contacts associated with a chamber cut-out and housed in said block, several blocks being mounted side by side in a molded case to form the multipole circuit breaker, the movable contact being arranged in the form of a rotary contact bridge cooperating with two opposite fixed contacts, being carried by a section of rotary bar, which extends transversely substantially at the center of said box while being inserted and guided laterally by the two large lateral faces of the box while being able to struggle in limited translation parallel to these large faces.

Un disjoncteur, du genre mentionné (voir par exemple FR-A-2 622 347 & EP-A-0 314 540), comporte pour chaque pôle un bloc individuel constitué par une ampoule, en l'occurrence par une boîte en matière plastique moulée contenant les contacts et les chambres de coupure. Les avantages de tels systèmes modulaires sont bien connus, en particulier les réductions des coûts de fabrication et de montage. Ils imposent néanmoins des contraintes de positionnement respectif des différents modules, en l'occurrence de liaison entre les parties mobiles des différents blocs unipolaires. Un disjoncteur connu comporte un arbre rotatif qui traverse l'ensemble des blocs unipolaires pour entraîner en rotation simultanée, les contacts mobiles de ces blocs. La présence de cet arbre rotatif impose des contraintes de positionnement et d'architecture.A circuit breaker, of the type mentioned (see for example FR-A-2 622 347 & EP-A-0 314 540), comprises for each pole an individual block constituted by a bulb, in this case by a molded plastic box containing the contacts and the breaking chambers. The advantages of such modular systems are well known, in particular the reduction in manufacturing and assembly costs. They nevertheless impose constraints on the respective positioning of the different modules, in this case of connection between the moving parts of the different unipolar blocks. A known circuit breaker comprises a rotary shaft which crosses all of the unipolar blocks to drive, in simultaneous rotation, the movable contacts of these blocks. The presence of this rotating shaft imposes constraints on positioning and architecture.

La présente invention a pour but de réaliser un disjoncteur multipolaire, du type modulaire, ayant une liaison mécanique entre les blocs unipolaires compatible avec l'emploi d'un pont de contacts.The object of the present invention is to produce a multipole circuit breaker, of the modular type, having a mechanical connection between the unipolar blocks compatible with the use of a contact bridge.

Le disjoncteur selon l'invention est caractérisé en ce que les tronçons de barreau des différents blocs juxtaposés sont mécaniquement solidarisés par deux barres de liaison parallèles qui s'étendent perpendiculairement auxdites grandes faces et traversent à faible jeu des orifices diamétralement opposés, ménagés dans les tronçons de barreau successifs, que les deux barres de liaison sont accouplées à une manivelle à deux bras diamétralement opposés, que lesdites deux grandes faces latérales comportent chacune deux lumières incurvées pour le passage avec jeu et le débattement desdites deux barres de liaison et qu'un mécanisme de commande, fixé à la partie supérieure de l'un des blocs, comporte deux flasques métalliques portant les paliers de ladite manivelle et une bielle inférieure actionnant ladite manivelle.The circuit breaker according to the invention is characterized in that the sections of bars of the various juxtaposed blocks are mechanically secured by two parallel connecting bars which extend perpendicularly to said large faces and pass through diametrically opposite orifices, made with little play, formed in successive bar sections, that the two connecting bars are coupled to a crank with two diametrically opposite arms, that said two large lateral faces each have two curved openings for the passage with clearance and the clearance of said two connecting bars and that a control mechanism, fixed to the upper part of one of the blocks , comprises two metal flanges carrying the bearings of said crank and a lower connecting rod actuating said crank.

Chaque bloc unipolaire constitue un ensemble de coupure logé dans une enveloppe isolante en forme de boîte, et ces blocs sont groupés dans une deuxième enveloppe constituée par le boîtier du disjoncteur multipolaire. Le pont de contact de chaque bloc unipolaire est monté flottant sur un tronçon de barreau et la liaison mécanique rigide entre les différents tronçons de barreau, est réalisée par les deux barres qui s'étendent parallèlement au barreau, et sont excentrées par rapport à l'axe de rotation de ce dernier.Each unipolar block constitutes a breaking assembly housed in an insulating envelope in the form of a box, and these blocks are grouped in a second envelope constituted by the casing of the multipolar circuit breaker. The contact bridge of each unipolar block is mounted floating on a section of bar and the rigid mechanical connection between the different sections of bar, is carried out by the two bars which extend parallel to the bar, and are offset from the axis of rotation of the latter.

Le tronçon de barreau est positionné dans la direction axiale par les deux grandes faces du boîtier qui l'encadrent, mais il est libre de bouger dans les autres directions pour compenser les irrégularités de fabrication ou de positionnement. Les deux barres de liaison, diamétralement opposées, solidarisent rigidement les tronçons successifs de barreau, tout en laissant libre la partie centrale du tronçon pour le passage du pont de contacts. Les grandes faces de la boîte ont des ouvertures en forme d'arc de cercle pour le passage avec jeu de barres de liaison, les seules autres ouvertures étant celles d'échappement des gaz de coupure à l'arrière des chambres.The bar section is positioned in the axial direction by the two large faces of the box which frame it, but it is free to move in the other directions to compensate for manufacturing or positioning irregularities. The two connecting bars, diametrically opposite, rigidly secure the successive sections of bar, while leaving free the central part of the section for the passage of the contact bridge. The large faces of the box have openings in the form of an arc of a circle for passage with a set of connecting bars, the only other openings being those for the exhaust of the cut-off gases at the rear of the chambers.

Selon un développement de l'invention, le mécanisme de commande du disjoncteur est associé à l'un des blocs unipolaires, de préférence au bloc central, et il est agencé pour être dispos sur la face supérieure de la boîte en s'inscrivant dans le gabarit en largeur de la boîte. Un tel mécanisme peut, dans ce cas, être utilisé pour l'ensemble de la gamme de disjoncteurs unipolaires ou multipolaires, ce qui facilite la fabrication d'une telle gamme de disjoncteurs. Le mécanisme est du type à manette, notamment pivotante, et à genouillère de commande en rotation d'une manivelle à deux bras diamétralement opposés. A chaque bras de la manivelle est accouplée l'une desdites barres de liaison pour entraîner en rotation les tronçons de barreau.According to a development of the invention, the circuit breaker control mechanism is associated with one of the unipolar blocks, preferably with the central block, and it is arranged to be placed on the upper face of the box by registering in the width of the box. Such a mechanism can, in this case, be used for the entire range of single-pole or multi-pole circuit breakers, which facilitates the manufacture of such a range of circuit breakers. The mechanism is of the lever type, in particular pivoting, and with a toggle for controlling the rotation of a crank with two diametrically opposite arms. One of said connecting bars is coupled to each arm of the crank to rotate the bar sections.

Le mécanisme comporte deux flasques latéraux dont chacun porte un palier d'une manivelle et ces flasques latéraux servent de pièces de fixation au bloc unipolaire associé, par exemple à l'aide de tiges d'alignement, qui relient les différents blocs unipolaires et les entretoises.Les entretoises entre deux blocs adjacents assurent la modularité entre les disjoncteurs d'une même gamme, en l'occurrence entre un disjoncteur unipolaire et un disjoncteur multipolaire, de la manière décrite en détail dans la demande de brevet français déposée conjointement, et intitulée"Gamme de disjoncteurs basse tension à boîtier moulé". La plaque entretoise présente en regard des ouvertures incurvées des grandes faces latérales de chaque boîte, deux lumières incurvées centrées sur l'axe du barreau pour le passage des deux barres de liaison.The mechanism comprises two lateral flanges, each of which carries a bearing with a crank and these lateral flanges serve as fastening parts to the associated unipolar block, for example using alignment rods, which connect the different unipolar blocks and the spacers. .The spacers between two adjacent blocks ensure modularity between circuit breakers of the same range, in this case between a single-pole circuit breaker and a multi-pole circuit breaker, as described in detail in the French patent application filed jointly, and entitled " Range of low voltage circuit breakers with molded case ". The spacer plate has, opposite the curved openings of the large lateral faces of each box, two curved openings centered on the axis of the bar for the passage of the two connecting bars.

On voit que les tronçons de barreau sont positionnés par rapport au mécanisme par les barres de liaison solidaires de la manivelle, tandis que les boîtes sont positionnées par les tiges d'alignement. Les imperfections de fabrication sont compensées par le faible jeu entre le tronçon de barreau et la boîte. Le tronçon de barreau,de forme générale cylindrique en un matériau isolant, comporte d'une part une lumière diamétrale traversée par le pont de contacts, et d'autre part deux orifices décalés angulairement et perpendiculaires à la lumière pour le passage sans jeu des barres de liaison qui sont ainsi isolées électriquement du pont de contacts. Les lumières incurvées des grandes faces latérales sont traversées avec'eu par les barres de liaison qui n'obturent que partiellement ces lumières. Pour disposer d'une partie centrale de la boîte quasi étanche et favoriser ainsi le déplacement de l'arc vers les chambres de coupure, les lumières incurvées sont coiffées par le fond du tronçon de barreau en regard de la grande face. L'étanchéité peut être améliorée en intercalant entre le fond et la grande face un disque souple solidaire des barres de liaison qui le traversent sans jeu. Lors d'une surpression interne le disque est plaqué contre la grande face latérale en obturant les lumières incurvées.We see that the bar sections are positioned relative to the mechanism by the connecting bars integral with the crank, while the boxes are positioned by the alignment rods. Manufacturing imperfections are compensated for by the small clearance between the bar section and the box. The bar section, of generally cylindrical shape made of an insulating material, comprises on the one hand a diametrical lumen crossed by the contact bridge, and on the other hand two orifices offset angularly and perpendicular to the lumen for the passage without clearance of the bars which are thus electrically isolated from the contact bridge. The curved openings of the large lateral faces are crossed with the eu by the connecting bars which only partially close these openings. For have a central part of the almost watertight box and thus favor the displacement of the arc towards the breaking chambers, the curved lights are capped by the bottom of the bar section facing the large face. The tightness can be improved by inserting between the bottom and the large face a flexible disc secured to the connecting bars which pass through it without play. During an internal overpressure the disc is pressed against the large lateral face by closing the curved openings.

Dans la position fermée du disjoncteur, les ponts de contacts des différents blocs modulaires s'étendent dans un plan sensiblement parallèle au fond du boîtier et chaque pont de contacts, cooopère d'une part, avec un contact fixe situé au dessus de ce plan et d'autre part, du côté opposé avec un contact fixe situé en dessous de ce plan. Chaque contact fixe est relié à une plage de connexion, et la plage connectée au contact fixe disposé au dessous du plan, est à proximité de la face avant de la boîte, tandis que la plage connectée à l'autre contact fixe, est au voisinage du fond de la boîte. Cette disposition confère une certaine symétrie au bloc unipolaire et facilite la connexion d'un bloc déclencheur qui peut être, soit intégré au boîtier du disjoncteur, soit être accolé à la petite face latérale du boîtier du disjoncteur. Le bloc déclencheur est commun aux différents blocs unipolaires, mais il est concevable de réaliser des systèmes modulaires chacun associé à l'un des blocs unipolaires. Le bloc déclencheur est disposé du côté des plages sur la face avant des blocs unipolaires.In the closed position of the circuit breaker, the contact bridges of the various modular blocks extend in a plane substantially parallel to the bottom of the housing and each contact bridge, cooopere on the one hand, with a fixed contact located above this plane and on the other hand, on the opposite side with a fixed contact located below this plane. Each fixed contact is connected to a connection pad, and the pad connected to the fixed contact arranged below the plane is close to the front face of the box, while the pad connected to the other fixed contact is in the vicinity from the bottom of the box. This arrangement gives the unipolar block a certain symmetry and facilitates the connection of a trip unit which can either be integrated into the circuit breaker box or be attached to the small side face of the circuit breaker box. The trigger block is common to the different unipolar blocks, but it is conceivable to produce modular systems each associated with one of the unipolar blocks. The trigger block is arranged on the side of the pads on the front face of the unipolar blocks.

La modularité du système facilite la réalisation d'une gamme de disjoncteurs à partir d'un nombre limité de sous-ensembles. Le système est particulièrement simple et la double enveloppe, ainsi que la double coupure lui confèrent des performances remarquables.The modularity of the system facilitates the realization of a range of circuit breakers from a limited number of sub-assemblies. The system is particularly simple and the double envelope, as well as the double cutoff, give it remarkable performance.

D'autres avantages et caractéristiques préférentielles ressortiront plus clairement de la description qui va suivre, d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple et représenté aux dessins annexés dans lesquels:Other advantages and preferential characteristics will emerge more clearly from the description which follows, of a method of implementation. work of the invention, given by way of example and shown in the accompanying drawings in which:

La figure 1 est une vue schématique en perspective éclatée d'un disjoncteur selon l'invention.Figure 1 is a schematic exploded perspective view of a circuit breaker according to the invention.

La figure 2 est une vue en perspective à échelle agrandie d'un bloc unipolaire et du mécanisme de commande associé du disjoncteur selon la figure 1.FIG. 2 is a perspective view on an enlarged scale of a single-pole unit and of the associated control mechanism of the circuit breaker according to FIG. 1.

La figure 3 est une vue en coupe transversale du bloc unipolaire.Figure 3 is a cross-sectional view of the unipolar block.

La figure 4 est une vue en coupe axiale du tronçon de barreau, montrant les clapets d'étanchéité.Figure 4 is an axial sectional view of the bar section, showing the sealing valves.

Sur les figures, un disjoncteur multipolaire à boîtier moulé 10 comporte quatre blocs unipolaires 11 de forme générale parallélélipèdique, et disposés côte à côte dans le boîtier 10. Chaque bloc unipolaire comporte une boîte 12 en matière plastique moulée ayant un fond 13, une face avant 14, deux grandes faces latérales parallèles 15,16 et deux petites faces parallèles 17,18. A l'intérieur de la boîte 12, est logé un pont de contacts 19, porté par un tronçon de barreau 20 s'étendant perpendiculairement aux grandes faces latérales 15,16. Le pont de contacts mobile 19 coopère, d'un côté avec un contact fixe 22, et du côté oppposé avec un contact fixe 23 et à chaque paire de contacts 19,22; 19,23 est associée une chambre de coupure 24 à tôles de désionisation. Le pont de contacts mobile 19 est monté flottant sur le tronçon de barreau 20, par l'intermédiaire de deux ressorts opposés de la manière décrite en détail dans le brevet français n°2.622.347. L'axe de rotation 21 du pont de contacts 19 est sensiblement au centre de la boîte 12, et en position de fermeture le pont de contacts 19, s'étend dans un plan médian, sensiblement parallèle au fond 13 de la boîte 12. Le contact fixe 22 est disposé au dessus de ce plan médian, et est raccordé à une plage de contact 25, à proximité de la face avant 14, de la boîte 12. D'une manière symétrique, l'autre contact opposé 23 est disposé en dessous de ce plan médian, et est relié à une plage 26 voisine du fond 13 de la boîte 12.In the figures, a multipolar circuit breaker with molded housing 10 comprises four unipolar blocks 11 of generally parallelepiped shape, and arranged side by side in the housing 10. Each unipolar block comprises a box 12 of molded plastic having a bottom 13, a front face 14, two large parallel side faces 15,16 and two small parallel faces 17,18. Inside the box 12, is housed a contact bridge 19, carried by a section of bar 20 extending perpendicularly to the large lateral faces 15, 16. The movable contact bridge 19 cooperates, on one side with a fixed contact 22, and on the opposite side with a fixed contact 23 and on each pair of contacts 19, 22; 19,23 is associated with a breaking chamber 24 with deionization plates. The movable contact bridge 19 is mounted floating on the bar section 20, by means of two opposite springs in the manner described in detail in French Patent No. 2,622,347. The axis of rotation 21 of the contact bridge 19 is substantially in the center of the box 12, and in the closed position the contact bridge 19 extends in a median plane, substantially parallel to the bottom 13 of the box 12. The fixed contact 22 is disposed above this median plane, and is connected to a contact pad 25, near the front face 14, of the box 12. In a symmetrical manner, the other contact opposite 23 is arranged below this median plane, and is connected to a track 26 near the bottom 13 of the box 12.

Le bloc unipolaire 11 est une unité indépendante constituant, l'un des pôles du disjoncteur, et l'association de plusieurs blocs unipolaires permet la réalisation d'un disjoncteur multipolaire. Les blocs unipolaires 11 sont accolés par leurs grandes faces latérales 15,16, avec interposition d'une plaque entretoise 27 définissant un intervalle entre les blocs successifs. Les tronçons de barreau 20 des différents blocs unipolaires 11 sont reliés mécaniquement par deux barres de liaison 28 qui s'étendent parallèlement à l'axe de rotation 21, et qui traversent sans jeu des orifices 29 ménagés dans les tronçons de barreau 20. Les barres de liaison 28 sont excentrées par rapport à l'axe de rotation 21, et les grandes faces latérales 15,16, et les plaques entretoises 27, présentent des lumières allongées 30 de forme incurvée, permettant le passage avec jeu des barres de liaison 28 avec une possibilité de débattement approprié au mouvement de rotation des tronçons de barreau 20.The unipolar block 11 is an independent unit constituting, one of the poles of the circuit breaker, and the association of several unipolar blocks allows the production of a multipolar circuit breaker. The unipolar blocks 11 are joined by their large lateral faces 15, 16, with the interposition of a spacer plate 27 defining an interval between the successive blocks. The bar sections 20 of the different unipolar blocks 11 are mechanically connected by two connecting bars 28 which extend parallel to the axis of rotation 21, and which pass without clearance through the orifices 29 formed in the bar sections 20. The bars connecting 28 are eccentric with respect to the axis of rotation 21, and the large lateral faces 15, 16, and the spacer plates 27, have elongated slots 30 of curved shape, allowing the passage with clearance of the connecting bars 28 with a possibility of travel suitable for the rotational movement of the bar sections 20.

Le tronçon de barreau 20, en forme de noix cylindrique en un matériau isolant, est encadré latéralement à faible jeu par les deux grandes faces 15,16, mais il est libre de se déplacer légèrement dans les autres directions pour compenser les irrégularités de fabrication ou de positionnement. Le pont de contacts 19, en forme de barre, traverse une lumière 33 ménagée suivant un diamètre dans le tronçon de barreau 20 et cette lumière 33 est décalée angulairement par rapport aux orifices 29 de passage des barres de liaison 28 perpendiculaires au pont de contacts 19.The bar section 20, in the form of a cylindrical nut made of an insulating material, is framed laterally with little play by the two large faces 15, 16, but it is free to move slightly in the other directions to compensate for manufacturing irregularities or positioning. The contact bridge 19, in the form of a bar, passes through a lumen 33 formed along a diameter in the bar section 20 and this lumen 33 is angularly offset with respect to the orifices 29 for passage of the connecting bars 28 perpendicular to the contact bridge 19 .

Sur la face avant 14 de l'un des blocs unipolaires centraux 11, est fixé un mécanisme 32, d'un type standard, ayant une manette de commande 31 et une genouillère. Le mécanisme 32 comporte deux flasques métalliques externes 34, s'étendant parallèlement en étant écartés d'une distance correspondant sensiblement à la largeur du bloc unipolaire 11. Ces flasques 34 sont fixés, à leur partie inférieure 35, sur le bloc unipolaire 11 par des tiges d'alignement 37 qui s'étendent perpendiculairement aux grandes faces 15,16 et traversent des orifices alignés 38,39 respectivement des flasques 34 et des boîtes 12. Chaque flasque 34 porte un palier 40 d'une manivelle 42 à axe 41 commandée par le mécanisme 32 pour effectuer une rotation limitée alternée respectivement pour l'ouverture et la fermeture du disjoncteur. Chaque manivelle 42 comporte deux bras opposés 43, chacun traversé sans jeu par l'une des barres de liaison 28. Une rotation des manivelles 42 est transmise par l'intermédiaire des deux barres 28, qui se débattent dans les lumières incurvées 30, aux différents tronçons de barreau 20 pour ouvrir et fermer les contacts 19,22,23.On the front face 14 of one of the central unipolar blocks 11, is fixed a mechanism 32, of a standard type, having a control lever 31 and a toggle. The mechanism 32 comprises two external metal flanges 34, extending in parallel while being spaced apart by a distance corresponding substantially to the width of the unipolar block 11. These flanges 34 are fixed, at their lower part 35, to the unipolar block 11 by alignment rods 37 which extend perpendicular to the large faces 15,16 and pass through aligned orifices 38,39 respectively flanges 34 and boxes 12. Each flange 34 carries a bearing 40 of a crank 42 with axis 41 controlled by the mechanism 32 to perform a limited rotation alternately respectively for the opening and closing of the circuit breaker. Each crank 42 has two opposite arms 43, each crossed without play by one of the connecting bars 28. A rotation of the cranks 42 is transmitted by means of the two bars 28, which struggle in the curved slots 30, to the different bar sections 20 for opening and closing the contacts 19,22,23.

Le mécanisme 32 est commun à l'ensemble des blocs unipolaires 11, et ce mécanisme est logé dans le boîtier 10, seule la manette 31 étant accessible de l'extérieur pour la commande du disjoncteur. Les barres 28 constituent une liaison rigide entre les tronçons 20 qui forment un barreau articulé par les paliers 40 sur les deux flasques 34. Les imperfections de positionnement ou de fabrication n'affectent pas le mouvement du pont de contacts 19 guidé par le tronçon de barreau 20, ce dernier étant monté avec jeu dans la boîte 12. A partir de blocs unipolaires standards 11, il est possible de fabriquer toute une gamme de disjoncteurs à boîtier moulé, la double enveloppe constituée par la boîte 12 et le boîtier 10, ainsi que le montage flottant du pont de contacts 19 garantissant des performances remarquables du disjoncteur.The mechanism 32 is common to all of the unipolar blocks 11, and this mechanism is housed in the housing 10, only the handle 31 being accessible from the outside for controlling the circuit breaker. The bars 28 constitute a rigid connection between the sections 20 which form a bar articulated by the bearings 40 on the two flanges 34. The imperfections in positioning or manufacturing do not affect the movement of the contact bridge 19 guided by the bar section 20, the latter being mounted with play in the box 12. From standard unipolar blocks 11, it is possible to manufacture a whole range of circuit breakers with molded casing, the double jacket constituted by the box 12 and the casing 10, as well as the floating mounting of the contact bridge 19 guaranteeing remarkable performances of the circuit breaker.

Le disjoncteur comporte un bloc de déclenchement (non représenté) qui est, soit intégré au boîtier 10, soit accolé à la petite face externe de ce dernier. Le déclencheur du type électronique ou électromécanique peut être commun à l'ensemble des blocs unipolaires 11, ou éventuellement être du type modulaire, associé à chaque unité polaire 11. A l'arrière des chambres de coupure 24 sont prévues des ouvertures 44 d'échappement des gaz de coupure vers l'extérieur de la boîte 12, les seules autres ouvertures de cette dernière étant les lumières incurvées 30 de passage des barres de liaison 28. La quasi étanchéité de la boîte 12, notamment dans sa partie centrale favorise la coupure, l'arc étant soufflé vers les chambres de coupures 34. En se référant à la figure 4, on voit que cette étanchéité est améliorée par le faible jeu entre la partie frontale 45 du tronçon de barreau 20 et la surface interne de la grande face 15,16. Selon un développement de l'invention, un disque soupôle 46 est intercalé entre le tronçon de barreau 20 et la grande face 15,16 en regard des lumières incurvées 30. Le disque 46 fonctionne en clapet venant se plaquer sur les faces 15,16 lors d'une surpression interne pour obturer les lumières 30. Les barres de liaison 28 traversent à faible jeu des trous ménagés dans le disque 46 qui se déplace avec ces barres. D'autres moyens d'obturation, par exemple à tiroir sont envisageables.The circuit breaker comprises a trip block (not shown) which is either integrated into the housing 10, or attached to the small external face of the latter. The trigger of the electronic or electromechanical type can be common to all the unipolar blocks 11, or possibly be of the modular type, associated with each pole unit 11. At the rear of the switching chambers 24 are provided exhaust openings 44 cut-off gases outside the box 12, the only other openings of the latter being the curved openings 30 for passage of the connecting bars 28. The quasi-tightness of the box 12, in particular in its central part promotes cutting, the arc being blown towards the cutting chambers 34. In with reference to FIG. 4, it can be seen that this sealing is improved by the small clearance between the front part 45 of the bar section 20 and the internal surface of the large face 15, 16. According to a development of the invention, a suspect disc 46 is interposed between the bar section 20 and the large face 15, 16 facing the curved openings 30. The disc 46 operates as a valve coming to be pressed against the faces 15, 16 during an internal overpressure to close off the openings 30. The connecting bars 28 pass through holes made in the disc 46 which moves with these bars with little play. Other sealing means, for example with a drawer, can be envisaged.

Claims (9)

  1. A low voltage multipole circuit breaker with double housing, each pole of which comprises, a single-pole breaking unit (11) having a parallelepipedic box (12) with two large side faces (15, 16), made of moulded plastic material, and movable and stationary contacts (19, 22, 23) associated to an extinguishing chamber (24) and housed in said unit (11), several units (11) being mounted side by side in a moulded case (10) to form the multipole circuit breaker, the movable contact being in the form of a rotating contact bridge (19) cooperating with two opposing stationary contacts (22, 23), and being supported by a rotating bar section (20), which extends transversely appreciably in the centre of said box (12), being inserted between and laterally guided by the two large side faces (15, 16) of the box (12) while being able to move in limited translation parallel to these large faces (15, 16), characterized in that the bar sections (20) of the different juxtaposed units (11) are mechanically united by two parallel connecting bars (28) which extend perpendicularly to said large faces (15, 16) and pass with small clearance through diametrically opposed orifices (29) arranged in the successive bar sections (20), that the two connecting bars (28) are coupled to a crank (42) with two diametrically opposed arms (43), that said two large side faces (15, 16) each comprise two curved apertures (30) for passage with clearance and movement of said two connecting bars (28) and that an operating mechanism (32), fixed to the upper part (14) of one of the units (11), comprises two metal flanges (34) supporting the bearings (40) of said crank (42) and a bottom rod actuating said crank.
  2. The circuit breaker according to claim 1, characterized in that said mechanism (32) is confined laterally by said two parallel flanges (34) the separating distance between which corresponds appreciably to that between said large faces (15, 16) of a single-pole unit (11).
  3. The circuit breaker according to claim 1, characterized in that the front face (45) of the bar section (20) facing the associated large side face (15, 16) is arranged to cover with small clearance said two curved apertures (30) limiting gas leaks via these apertures to the outside of the box (12) and to achieve a box whose central part is almost leaktight.
  4. The circuit breaker according to claim 3, characterized in that between said front face (45) and the large side face (15, 16) there is inserted a flexible disk (46) which is fixedly secured in rotation to said bars (28) and which covers said apertures, in such a way as to form a valve sealing off the apertures when an internal overpressure occurs in the box.
  5. The circuit breaker according to any one of the foregoing claims, characterized in that spacer plates (27) are inserted between adjacent single-pole units (11), that all the single-pole units (11) and spacers (27) are connected by alignment rods (37), and that the spacer plates comprise curved apertures (30) for the passage of the connecting bars (28).
  6. The circuit breaker according to claim 5, characterized in that the alignment rods (37) pass without clearance through orifices (38) arranged in the flanges (34) of the mechanism (32).
  7. The circuit breaker according to any one of the foregoing claims, characterized in that the mechanism (32) comprises a manual operating handle (31), and that the mechanism is housed in said case (10) which comprises an aperture for the handle to pass through.
  8. The circuit breaker according to any one of the foregoing claims, characterized in that said bar section (20) is made of insulating material having a window (33) for the contact bridge (19) to pass through, mounted floating according to a diameter of said section (20) and that the orifices (29) for passage of the two connecting bars (28) are angularly offset with respect to said diameter.
  9. The circuit breaker according to any one of the foregoing claims, characterized in that a handle (42) is fitted on each side of the box (12) and that the connecting bars (28) pass through all the bar sections (20) and both the handles (42).
EP92420356A 1991-10-15 1992-10-09 Multipole circuit-breaker being composed of single-pole units Expired - Lifetime EP0542636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112793A FR2682531B1 (en) 1991-10-15 1991-10-15 MULTIPOLAR CIRCUIT BREAKER WITH SINGLE POLE BLOCKS.
FR9112793 1991-10-15

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EP0542636A1 EP0542636A1 (en) 1993-05-19
EP0542636B1 true EP0542636B1 (en) 1996-04-17

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EP (1) EP0542636B1 (en)
JP (1) JP3392442B2 (en)
KR (1) KR100299551B1 (en)
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AT (1) ATE137058T1 (en)
AU (1) AU659219B2 (en)
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CA (1) CA2080063C (en)
DE (1) DE69209972T2 (en)
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FR (1) FR2682531B1 (en)
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MY107991A (en) 1996-07-15
FR2682531B1 (en) 1993-11-26
JP3392442B2 (en) 2003-03-31
ES2087493T3 (en) 1996-07-16
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MX9205923A (en) 1993-04-01
ATE137058T1 (en) 1996-05-15
DE69209972D1 (en) 1996-05-23
KR930008897A (en) 1993-05-22
KR100299551B1 (en) 2001-10-22
DE69209972T2 (en) 1996-10-31
AU659219B2 (en) 1995-05-11
BR9203982A (en) 1993-04-27
FR2682531A1 (en) 1993-04-16
CN1071785A (en) 1993-05-05
US5281776A (en) 1994-01-25
TW214013B (en) 1993-10-01
ZA927903B (en) 1993-04-21
CA2080063A1 (en) 1993-04-16
CN1028935C (en) 1995-06-14
CA2080063C (en) 2002-12-10
AU2639792A (en) 1993-04-22
EP0542636A1 (en) 1993-05-19

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