EP0314540A1 - Opening device for a multipole circuit breaker with a rotating contact bridge - Google Patents

Opening device for a multipole circuit breaker with a rotating contact bridge Download PDF

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Publication number
EP0314540A1
EP0314540A1 EP88402559A EP88402559A EP0314540A1 EP 0314540 A1 EP0314540 A1 EP 0314540A1 EP 88402559 A EP88402559 A EP 88402559A EP 88402559 A EP88402559 A EP 88402559A EP 0314540 A1 EP0314540 A1 EP 0314540A1
Authority
EP
European Patent Office
Prior art keywords
bar
contact
springs
rotary contact
longitudinal direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88402559A
Other languages
German (de)
French (fr)
Other versions
EP0314540B1 (en
Inventor
Roger Bolongeat-Mobleu
Jean-Pierre Néreau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0314540A1 publication Critical patent/EP0314540A1/en
Application granted granted Critical
Publication of EP0314540B1 publication Critical patent/EP0314540B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H1/32—Self-aligning contacts
    • 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
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
    • 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
    • H01H1/12—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
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H2001/223—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member using a torsion spring

Definitions

  • the invention relates to a breaking device for a low-voltage multipole circuit breaker and with an insulating housing, comprising a rotary switching bar guided in rotation around a first transverse fixed axis by means of bearings provided in the housing, said first axis being perpendicular to the longitudinal direction of each pole, which comprises: - a pair of fixed contacts in connection with the connection pads; - A double-break rotary contact extending in a housing of the bar in the longitudinal direction of the pole, and having opposite contact parts cooperating with the fixed contacts in the closed position; - A pair of springs arranged inside the bar housing to cooperate with the rotary contact while ensuring a predetermined contact pressure of the contact parts on the fixed contacts;
  • the central part of the rotary contact comprises an oblong hole threaded on a fixed support rod to form a guide system having a degree of freedom in translation.
  • the fixed support rod has a cylindrical shape and is mounted coaxially in the bar, so that the rotary contact can move slightly in the direction perpendicular to the longitudinal axis of the pole to ensure a balanced contact pressure at the two cut-off intervals.
  • the diameter of the rod corresponds substantially to the width of the oblong hole, and any displacement of the rotary contact in the longitudinal direction is made impossible.
  • the longitudinal positioning of the rotary contact is precisely determined by the support rod, which imposes strict manufacturing tolerances.
  • the contact pressure springs do not provide effective self-centering of the movable contact in the longitudinal direction of extension of the connection pads.
  • the positioning of the movable contact relative to the fixed contacts may change during the life of the switch. This results in a longitudinal offset of the contacts which is harmful to breaking the arc.
  • the object of the invention is to simplify the mounting of a double-break rotary contact on the switching rod of a circuit breaker with molded insulating housing.
  • the breaking device is characterized in that the rotary contact is resiliently positioned by the springs along the longitudinal direction of the pole, and is capable of pivoting inside the housing around a second imaginary axis, mounted floating with respect to the first fixed axis of the bar, the maintenance of the rotary contact inside the bar housing operating with two degrees of freedom in translation, capable of simultaneously generating a torque of uniform distribution of the contact pressure on the two pairs of contacts, and an equilibrium position of the rotary contact obtained by the self-centering effect of the springs in the longitudinal direction.
  • the mounting of the rotary contact is simplified, and the presence of the only two springs ensures self-centering of the rotary contact on the second axis.
  • the latter can be confused with the first transverse fixed axis of the bar, or on the contrary move in a plane perpendicular to the first axis.
  • the springs cooperating with the rotary contact can be springs of the torsion, traction or compression type.
  • a breaking pole 10 of a low voltage circuit breaker is housed in a compartment of the housing 12 of molded insulating material.
  • the pole 10 comprises a rotary contact 14 with double break capable of pivoting about an axis 16 of rotation between a closed position ( Figure 1), and an open position (not shown).
  • the axis 16 of rotation is located in the central zone of the pole 10, and the rotary contact 14 is constituted by a pair of lever arms 18, 20 extending between the axis 16 of rotation and two contact parts 22, 24 opposite cooperating respectively with fixed contacts 26,28.
  • connection pads 30, 32 crossing two opposite faces of the housing 12.
  • the areas 30, 32 are aligned in the longitudinal direction 34 of the pole, and their internal ends carry the fixed contacts 26, 28.
  • An arc extinguishing chamber 36, 38 comprising a stack of metal sheets, is associated with each pair of contacts 26, 22; 28,24 located on the same side of the axis of rotation 16.
  • the nominal current flows through the main circuit of the pole by entering through one of the ranges, for example 30, and then passing through the fixed contact 26, the rotary contact 14, the fixed contact 28 to exit the pole by the other area 32.
  • the rotation of the movable contact 14 clockwise causes the two pairs of contacts 26,22 to separate simultaneously; 28,24, and the formation of two arcs connected in series.
  • the rotary contact 14 is driven in rotation by means of a switch bar 40 of insulating material extending in the transverse direction of the axis 16 of rotation of the contact 14.
  • the bar 40 is guided in rotation about an axis transverse fixed by means of bearings arranged in the housing 12.
  • the bar 40 occupies the central compartment 39 of the housing 12, separated from the extinguishing chambers 36, 38 by walls 37 of subdivision. Ports 35 are provided in the walls 37 for the passage of the movable contact 14.
  • a control mechanism (not shown) is mechanically coupled to the bar 40 to transmit the opening and closing movements to the different poles.
  • the rotary contact 14 of the pole 10 is positioned in a housing 41 of the bar 40 extending perpendicular to the transverse axis 16 and parallel to the longitudinal direction 34.
  • the functions of holding and guiding the rotary contact 14 inside the housing 41 are provided by a pair of torsion springs 42, 44 arranged coaxially along the axis. of rotation 16 on either side of the contact 14.
  • the first torsion spring 42 has a curved end 46 hooked in a notch 47 of the lever arm 18, and the opposite end 48 is stressed by the elasticity of the spring 42 in abutment against an internal projection 50 of the bar 40.
  • the notch 47 for hooking the spring 42 is located opposite the contact piece 22.
  • the second spring 44 is anchored in a similar manner in a notch 52 of the lever arm 20, and on an internal projection 54 of the bar 40.
  • the two projections 50, 54 of the bar 40 are diametrically opposite with respect to the axis of rotation 16.
  • the presence of the two torsion springs 42,44 urges the rotary contact in a counterclockwise direction to ensure a uniform distribution of the contact pressure of the contact parts 22,24 on the corresponding fixed contacts 26,28, and at the same time allows a elastic positioning of the movable contact 14 along the longitudinal direction 34 of the pole.
  • the second imaginary axis of rotation 16 of the movable contact 14 is mounted floating relative to the first fixed axis of the bar 40.
  • the movable contact 14 with double break tends towards a position of equilibrium in the longitudinal direction as a function of the manufacturing tolerances of the housing 12 and of the bar 40.
  • the positioning of the rotary contact 14 in the housing 41 of the bar 40 is effected by means of two tension springs 60,62 arranged in the median plane having as trace the longitudinal direction 34 of the pole.
  • the first tension spring 60 is interposed between a lug 64 fixed on a boss of the lever arm 18, and a lug 66 for anchoring secured to the bar 40.
  • the second tension spring 62 is mounted in a similar manner between a lug 68 of the lever arm 20 and a tab 70 of the bar 40.
  • the two lugs 64 and 68 of the rotary contact 14 with double break are diametrically opposite with respect to the axis of rotation 16. It is the same for the two legs 66 and 70 of the bar 40.
  • the two tension springs 60, 62 extend parallel to one another in an oblique direction relative to the horizontal direction 34 (FIG. 3). Such an arrangement of the springs 60, 62 makes it possible to generate both a torque of contact pressure, and an equilibrium position of the rotary contact 14 in the longitudinal direction 34.
  • the rotary contact 14 is associated with two compression springs 72,74 making it possible to obtain the contact pressure on the fixed contacts 26,28, and the longitudinal equilibrium position.
  • the rotary contact 14 can be separated from the fixed contacts 26, 28 by the effect of electrodynamic repulsion, while the bar 40 remains stationary until the control mechanism is triggered.
  • This repulsion effect is obtained by an appropriate shape, in particular in a loop, of the pads 30, 32 for supporting the two fixed contacts 26, 28.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

An opening device for a low-voltage circuit-breaker includes, in each pole, a switch bar (40), a pair of fixed contacts (26, 28) communicating with the connecting areas (30, 32), a double-opening rotary contact (14) extending into a housing (41) of the bar (40), and two arc-quenching chambers (36, 38) disposed on either side of the bar (40). Two contact compression springs (60, 62) ensure elastic positioning of the rotary contact (14) along the longitudinal direction of the pole. The pivoting of the rotary contact (14) takes place about a dummy axle (16) mounted so as to float in relation to the fixed axle of rotation of the bar (40). …<IMAGE>…

Description

L'invention est relative à un dispositif de coupure pour un disjoncteur multipolaire à basse tension et à boîtier isolant, comprenant un barreau rotatif de commutation guidé en rotation autour d'un premier axe fixe transversal au moyen de paliers ménagés dans le boîtier, ledit premier axe étant perpendiculaire à la direction longitudinale de chaque pôle, lequel comporte:
- une paire de contacts fixes en liaison avec les plages de raccordement;
- un contact rotatif à double coupure s'étendant dans un logement du barreau selon la direction longitudinale du pôle, et ayant des pièces de contact opposées coopérant avec les contacts fixes en position de fermeture;
- une paire de ressorts agencée à l'intérieur du logement du barreau pour coopérer avèc le contact rotatif en assurant une pression de contact prédéterminée des pièces de contact sur les contacts fixes;The invention relates to a breaking device for a low-voltage multipole circuit breaker and with an insulating housing, comprising a rotary switching bar guided in rotation around a first transverse fixed axis by means of bearings provided in the housing, said first axis being perpendicular to the longitudinal direction of each pole, which comprises:
- a pair of fixed contacts in connection with the connection pads;
- A double-break rotary contact extending in a housing of the bar in the longitudinal direction of the pole, and having opposite contact parts cooperating with the fixed contacts in the closed position;
- A pair of springs arranged inside the bar housing to cooperate with the rotary contact while ensuring a predetermined contact pressure of the contact parts on the fixed contacts;

L'utilisation dans un disjoncteur d'un contact rotatif à double coupure permet la mise en série de deux arcs favorable à un pouvoir de coupure élevé. Dans un système hyperstatique à guidage intégral en rotation du contact mobile se pose le problème de la répartition uniforme de la pression de contact sur les deux contacts fixes. Une solution à ce problème est proposée dans le document EP174904, dans lequel la partie centrale du contact rotatif comporte un trou oblong enfilé sur une tige fixe de support pour former un système de guidage ayant un degré de liberté en translation. La tige fixe de support a une forme cylindrique et est montée coaxialement dans le barreau, tel que le contact rotatif puisse se déplacer légèrement dans la direction perpendiculaire à l'axe longitudinal du pôle pour assurer une pression de contact équilibrée au niveau des deux intervalles de coupure. Le diamètre de la tige correspond sensiblement à la largeur du trou oblong, et tout déplacement du contact rotatif dans la direction longitudinale est rendu impossible. Le positionnement longitudinal du contact rotatif est déterminé avec précision par la tige support, ce qui impose des tolérances sévères de fabrication.The use in a circuit breaker of a double-breaking rotary contact allows the series connection of two arcs favorable to a high breaking capacity. In a hyperstatic system with integral guidance in rotation of the movable contact, the problem arises of the uniform distribution of the contact pressure on the two fixed contacts. A solution to this problem is proposed in document EP174904, in which the central part of the rotary contact comprises an oblong hole threaded on a fixed support rod to form a guide system having a degree of freedom in translation. The fixed support rod has a cylindrical shape and is mounted coaxially in the bar, so that the rotary contact can move slightly in the direction perpendicular to the longitudinal axis of the pole to ensure a balanced contact pressure at the two cut-off intervals. The diameter of the rod corresponds substantially to the width of the oblong hole, and any displacement of the rotary contact in the longitudinal direction is made impossible. The longitudinal positioning of the rotary contact is precisely determined by the support rod, which imposes strict manufacturing tolerances.

Dans l'interrupteur rotatif à double coupure selon le document DE-OS-2.845.950, les ressorts de pression contact n'assurent pas un auto-centrage efficace du contact mobile dans la direction longitudinale d'extension des plages de raccordement. Le positionnement du contact mobile par rapport aux contacts fixes risque d'être modifié au cours de la durée de vie de l'interrupteur. Il en résulte un décalage longitudinal des contacts néfaste à la coupure de l'arc.In the double-break rotary switch according to document DE-OS-2.845.950, the contact pressure springs do not provide effective self-centering of the movable contact in the longitudinal direction of extension of the connection pads. The positioning of the movable contact relative to the fixed contacts may change during the life of the switch. This results in a longitudinal offset of the contacts which is harmful to breaking the arc.

L'objet de l'invention consiste à simplifier le montage d'un contact rotatif à double coupure sur le barreau de commutation d'un disjoncteur à boîtier isolant moulé.The object of the invention is to simplify the mounting of a double-break rotary contact on the switching rod of a circuit breaker with molded insulating housing.

Le dispositif de coupure selon l'invention est caractérisé en ce que le contact rotatif est positionné élastiquement par les ressorts le long de la direction longitudinale du pôle, et est susceptible de pivoter à l'intérieur du logement autour d'un deuxième axe fictif, monté flottant par rapport au premier axé fixe du barreau, le maintien du contact rotatif à l'intérieur du logement du barreau s'opèrant avec deux degrés de liberté en translation, capable d'engendrer simultanément un couple de répartition uniforme de la pression de contact sur les deux paires de contacts, et une position d'équilibre du contact rotatif obtenue par effet d'auto-centrage des ressorts dans la direction longitudinale.The breaking device according to the invention is characterized in that the rotary contact is resiliently positioned by the springs along the longitudinal direction of the pole, and is capable of pivoting inside the housing around a second imaginary axis, mounted floating with respect to the first fixed axis of the bar, the maintenance of the rotary contact inside the bar housing operating with two degrees of freedom in translation, capable of simultaneously generating a torque of uniform distribution of the contact pressure on the two pairs of contacts, and an equilibrium position of the rotary contact obtained by the self-centering effect of the springs in the longitudinal direction.

Le montage du contact rotatif est simplifié, et la présence des deux seuls ressorts permet d'assurer un autocentrage du contact rotatif sur le deuxième axe. Ce dernier peut être confondu avec le premier axe fixe transversal du barreau, ou au contraire se déplacer dans un plan perpendiculaire au premier axe.The mounting of the rotary contact is simplified, and the presence of the only two springs ensures self-centering of the rotary contact on the second axis. The latter can be confused with the first transverse fixed axis of the bar, or on the contrary move in a plane perpendicular to the first axis.

Les ressorts coopérant avec le contact rotatif peuvent être des ressorts du type à torsion, traction ou compression.The springs cooperating with the rotary contact can be springs of the torsion, traction or compression type.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de plusieurs modes de réalisation, donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, dans lesquels:

  • - la figure 1 est une vue schématique en coupe verticale d'un dispositif de coupure selon l'invention, les contacts du disjoncteur étant représentés en position de fermeture;
  • - la figure 2 est une vue en coupe horizontale de la figure 1;
  • - les figures 3 et 4 montrent des vues analogues à celles des figures 1 et 2, d'une variante de réalisation;
  • - les figures 5 et 6 représentent des vues analogues à celles des figures 1 et 2 d'une autre variante.
Other advantages and characteristics will emerge more clearly from the description which follows of several embodiments, given by way of nonlimiting examples and represented in the appended drawings, in which:
  • - Figure 1 is a schematic view in vertical section of a breaking device according to the invention, the contacts of the circuit breaker being shown in the closed position;
  • - Figure 2 is a horizontal sectional view of Figure 1;
  • - Figures 3 and 4 show views similar to those of Figures 1 and 2, of an alternative embodiment;
  • - Figures 5 and 6 show views similar to those of Figures 1 and 2 of another variant.

En référence aux figures 1 et 2, un pôle de coupure 10 d'un disjoncteur à basse tension est logé dans un compartiment du boîtier 12 en matériau isolant moulé. Le pôle 10 comporte un contact rotatif 14 à double coupure susceptible de pivoter autour d'un axe 16 de rotation entre une position de fermeture (figure 1), et une position d'ouverture (non représentée). L'axe 16 de rotation se trouve dans la zone centrale du pôle 10, et le contact rotatif 14 est constitué par une paire de bras de leviers 18,20 s'étendant entre l'axe 16 de rotation et deux pièces de contact 22,24 opposées coopérant respectivement avec des contacts fixes 26,28.Referring to Figures 1 and 2, a breaking pole 10 of a low voltage circuit breaker is housed in a compartment of the housing 12 of molded insulating material. The pole 10 comprises a rotary contact 14 with double break capable of pivoting about an axis 16 of rotation between a closed position (Figure 1), and an open position (not shown). The axis 16 of rotation is located in the central zone of the pole 10, and the rotary contact 14 is constituted by a pair of lever arms 18, 20 extending between the axis 16 of rotation and two contact parts 22, 24 opposite cooperating respectively with fixed contacts 26,28.

Le raccordement électrique du pôle s'effectue au moyen de deux plages de connexion 30,32 traversant deux faces opposées du boîtier 12. Les plages 30,32 sont alignées selon la direction longitudinale 34 du pôle, et leurs extrémités internes portent les contacts fixes 26,28. Une chambre d'extinction d'arc 36,38 comprenant un empilage de tôles métalliques, est associée à chaque paire de contacts 26,22; 28,24 située d'un même côté de l'axe de rotation 16.The electrical connection of the pole is made by means of two connection pads 30, 32 crossing two opposite faces of the housing 12. The areas 30, 32 are aligned in the longitudinal direction 34 of the pole, and their internal ends carry the fixed contacts 26, 28. An arc extinguishing chamber 36, 38 comprising a stack of metal sheets, is associated with each pair of contacts 26, 22; 28,24 located on the same side of the axis of rotation 16.

En position de fermeture du disjoncteur, le courant nominal traverse le circuit principal du pôle en entrant par l'une des plages, par exemple 30, et en parcourant ensuite le contact fixe 26, le contact rotatif 14, le contact fixe 28 pour sortir du pôle par l'autre plage 32. La rotation du contact mobile 14 dans le sens des aiguilles d'une montre provoque la séparation simultanée des deux paires de contacts 26,22; 28,24, et la formation de deux arcs connectés en série. Le contact rotatif 14 est entraîné en rotation au moyen d'un barreau 40 de commutation en matériau isolant s'étendant selon la direction transversale de l'axe 16 de rotation du contact 14. Le barreau 40 est guidé en rotation autour d'un axe fixe transversal au moyen de paliers agencés dans le boîtier 12.In the closed position of the circuit breaker, the nominal current flows through the main circuit of the pole by entering through one of the ranges, for example 30, and then passing through the fixed contact 26, the rotary contact 14, the fixed contact 28 to exit the pole by the other area 32. The rotation of the movable contact 14 clockwise causes the two pairs of contacts 26,22 to separate simultaneously; 28,24, and the formation of two arcs connected in series. The rotary contact 14 is driven in rotation by means of a switch bar 40 of insulating material extending in the transverse direction of the axis 16 of rotation of the contact 14. The bar 40 is guided in rotation about an axis transverse fixed by means of bearings arranged in the housing 12.

Le barreau 40 occupe le compartiment central 39 du boîtier 12, séparé des chambres d'extinction 36,38 par des parois 37 de subdivision. Des orifices 35 sont ménagés dans les parois 37 pour le passage du contact mobile 14.The bar 40 occupies the central compartment 39 of the housing 12, separated from the extinguishing chambers 36, 38 by walls 37 of subdivision. Ports 35 are provided in the walls 37 for the passage of the movable contact 14.

Un mécanisme de commande (non représenté) est accouplé mécaniquement au barreau 40 pour transmettre les mouvements d'ouverture et de fermeture vers les différents pôles.A control mechanism (not shown) is mechanically coupled to the bar 40 to transmit the opening and closing movements to the different poles.

Le contact rotatif 14 du pôle 10 est positionné dans un logement 41 du barreau 40 en s'étendant perpendiculairement à l'axe transversal 16 et parallèlement à la direction longitudinale 34.The rotary contact 14 of the pole 10 is positioned in a housing 41 of the bar 40 extending perpendicular to the transverse axis 16 and parallel to the longitudinal direction 34.

Les fonctions de maintien et de guidage du contact rotatif 14 à l'intérieur du logement 41 sont assurées par une paire de ressorts de torsion 42,44 disposés coaxialement le long de l'axe de rotation 16 de part et d'autre du contact 14. Le premier ressort 42 de torsion comporte une extrémité recourbée 46 accrochée dans une encoche 47 du bras de levier 18, et l'extrémité opposée 48 est sollicitée par l'élasticité du ressort 42 en butée contre une saillie 50 interne du barreau 40. L'encoche 47 d'accrochage du ressort 42 est située à l'opposé de la pièce de contact 22.The functions of holding and guiding the rotary contact 14 inside the housing 41 are provided by a pair of torsion springs 42, 44 arranged coaxially along the axis. of rotation 16 on either side of the contact 14. The first torsion spring 42 has a curved end 46 hooked in a notch 47 of the lever arm 18, and the opposite end 48 is stressed by the elasticity of the spring 42 in abutment against an internal projection 50 of the bar 40. The notch 47 for hooking the spring 42 is located opposite the contact piece 22.

Le deuxième ressort 44 est ancré d'une manière similaire dans une encoche 52 du bras de levier 20, et sur une saillie 54 interne du barreau 40. Les deux saillies 50,54 du barreau 40 sont diamétralement opposées par rapport à l'axe de rotation 16.The second spring 44 is anchored in a similar manner in a notch 52 of the lever arm 20, and on an internal projection 54 of the bar 40. The two projections 50, 54 of the bar 40 are diametrically opposite with respect to the axis of rotation 16.

La présence des deux ressorts de torsion 42,44 sollicite le contact rotatif dans le sens trigonométrique pour assurer une répartition uniforme de la pression de contact des pièces de contact 22,24 sur les contacts fixes 26,28 correspondants, et autorise en même temps un positionnement élastique du contact mobile 14 le long de la direction longitudinale 34 du pôle. A l'intérieur du logement 41, le deuxième axe fictif de rotation 16 du contact mobile 14 est monté flottant par rapport au premier axe fixe du barreau 40. Il en résulte que le contact mobile 14 à double coupure tend vers une position d'équilibre dans la direction longitudinale en fonction des tolérances de fabrication du boîtier 12 et du barreau 40.The presence of the two torsion springs 42,44 urges the rotary contact in a counterclockwise direction to ensure a uniform distribution of the contact pressure of the contact parts 22,24 on the corresponding fixed contacts 26,28, and at the same time allows a elastic positioning of the movable contact 14 along the longitudinal direction 34 of the pole. Inside the housing 41, the second imaginary axis of rotation 16 of the movable contact 14 is mounted floating relative to the first fixed axis of the bar 40. As a result, the movable contact 14 with double break tends towards a position of equilibrium in the longitudinal direction as a function of the manufacturing tolerances of the housing 12 and of the bar 40.

Selon la variante des figures 3 et 4, le positionnement du contact rotatif 14 dans le logement 41 du barreau 40 s'opère au moyen de deux ressorts de traction 60,62 disposés dans le plan médian ayant pour trace la direction longitudinale 34 du pôle. Le premier ressort de traction 60 est intercalé entre un ergot 64 fixé sur un bossage du bras de levier 18, et une patte 66 d'ancrage solidaire du barreau 40. Le deuxième ressort de traction 62 est monté d'une manière similaire entre un ergot 68 du bras de levier 20 et une patte 70 du barreau 40. Les deux ergots 64 et 68 du contact rotatif 14 à double coupure sont diamétralement opposés par rapport à l'axe de rotation 16. Il en est de même pour les deux pattes 66 et 70 du barreau 40. Les deux ressorts de traction 60,62 s'étendent parallèlement l'un à l'autre selon une direction oblique par rapport à la direction horizontale 34 (figure 3). Une telle disposition des ressorts 60,62 permet d'engendrer à la fois un couple de pression de contact, et une position d'équilibre du contact rotatif 14 dans la direction longitudinale 34.According to the variant of Figures 3 and 4, the positioning of the rotary contact 14 in the housing 41 of the bar 40 is effected by means of two tension springs 60,62 arranged in the median plane having as trace the longitudinal direction 34 of the pole. The first tension spring 60 is interposed between a lug 64 fixed on a boss of the lever arm 18, and a lug 66 for anchoring secured to the bar 40. The second tension spring 62 is mounted in a similar manner between a lug 68 of the lever arm 20 and a tab 70 of the bar 40. The two lugs 64 and 68 of the rotary contact 14 with double break are diametrically opposite with respect to the axis of rotation 16. It is the same for the two legs 66 and 70 of the bar 40. The two tension springs 60, 62 extend parallel to one another in an oblique direction relative to the horizontal direction 34 (FIG. 3). Such an arrangement of the springs 60, 62 makes it possible to generate both a torque of contact pressure, and an equilibrium position of the rotary contact 14 in the longitudinal direction 34.

Sur les figures 5 et 6, le contact rotatif 14 est associé à deux ressorts de compression 72,74 permettant d'obtenir la pression de contact sur les contacts fixes 26,28, et la position longitudinale d'équilibre.In FIGS. 5 and 6, the rotary contact 14 is associated with two compression springs 72,74 making it possible to obtain the contact pressure on the fixed contacts 26,28, and the longitudinal equilibrium position.

On remarque sur les trois variantes des figures 1 à 6, que le contact rotatif 14 peut être séparé des contacts fixes 26,28 par effet de répulsion électrodynamique, pendant que le barreau 40 reste immobile jusqu'au déclenchement du mécanisme de commande. Cet effet de répulsion est obtenue par une forme appropriée, notamment en boucle, des plages 30, 32 de support des deux contacts fixes 26, 28.It will be noted in the three variants of FIGS. 1 to 6, that the rotary contact 14 can be separated from the fixed contacts 26, 28 by the effect of electrodynamic repulsion, while the bar 40 remains stationary until the control mechanism is triggered. This repulsion effect is obtained by an appropriate shape, in particular in a loop, of the pads 30, 32 for supporting the two fixed contacts 26, 28.

Claims (6)

1.Dispositif de coupure pour un disjoncteur multipolaire à basse tension et à boîtier (12) isolant, comprenant un barreau (40) rotatif de commutation guidé en rotation autour d'un premier axe fixe transversal au moyen de paliers ménagés dans le boîtier 12), ledit premier axe étant perpendiculaire à la direction longitudinale (34) de chaque pôle, lequel comporte:
- une paire de contacts fixes (26,28) en liaison avec les plages de raccordement (30,32)
- un contact rotatif (14) à double coupure s'étendant dans un logement (41) du barreau (40) selon la direction longitudinale (34) du pôle, et ayant des pièces de contact (22,24) opposées coopérant avec les contacts fixes (26,28) en position de fermeture;
- une paire de ressorts (42,44; 60,62; 72,74) agencée à l'intérieur du logement (41) du barreau (40) pour coopérer avec le contact rotatif (14) en assurant une pression de contact prédéterminée des pièces de contact (22,24) sur les contacts fixes (26,28);
caractérisé en ce que le contact rotatif (14) est positionné élastiquement par les ressorts le long de la direction longitudinale (34) du pôle, et est susceptible de pivoter à l'intérieur du logement (41) autour d'un deuxième axe (16) fictif, monté flottant par rapport au premier axe fixe du barreau (40), le maintien du contact rotatif (14) à l'intérieur du logement (41) du barreau (40) s'opèrant avec deux degrés de liberté en translation, capable d'engendrer simultanément un couple de répartition uniforme de la pression de contact sur les deux paires de contacts (26,22; 28,24), et une position d'équilibre du contact rotatif (14) obtenue par effet d'auto-­ centrage des ressorts (42,44; 60, 62; 72,74) dans la direction longitudinale (34).1.Switching device for a low-voltage multipolar circuit breaker and with an insulating housing (12), comprising a rotary switching bar (40) guided in rotation around a first transverse fixed axis by means of bearings provided in the housing 12) , said first axis being perpendicular to the longitudinal direction (34) of each pole, which comprises:
- a pair of fixed contacts (26,28) in connection with the connection pads (30,32)
- a rotary contact (14) with double break extending in a housing (41) of the bar (40) in the longitudinal direction (34) of the pole, and having opposite contact pieces (22,24) cooperating with the contacts fixed (26,28) in the closed position;
- a pair of springs (42,44; 60,62; 72,74) arranged inside the housing (41) of the bar (40) to cooperate with the rotary contact (14) while ensuring a predetermined contact pressure of the contact parts (22,24) on the fixed contacts (26,28);
characterized in that the rotary contact (14) is resiliently positioned by the springs along the longitudinal direction (34) of the pole, and is capable of pivoting inside the housing (41) around a second axis (16 ) imaginary, mounted floating relative to the first fixed axis of the bar (40), the maintenance of the rotary contact (14) inside the housing (41) of the bar (40) operating with two degrees of freedom in translation, capable of simultaneously generating a uniform distribution torque of the contact pressure on the two pairs of contacts (26,22; 28,24), and an equilibrium position of the rotary contact (14) obtained by self-effect centering of the springs (42,44; 60, 62; 72,74) in the longitudinal direction (34). 2. Dispositif de coupure selon la revendication 1, caractérisé en ce que le contact rotatif (14) comporte deux bras de leviers (18,20) centrés sur le deuxième axe (16) et coopérant avec une extrémité desdits ressorts (42,44; 60,62; 72,74), l'autre extrémité étant solidarisée au barreau 40.2. Cutting device according to claim 1, characterized in that the rotary contact (14) comprises two lever arms (18,20) centered on the second axis (16) and cooperating with one end of said springs (42,44; 60.62; 72.74), the other end being secured to the bar 40. 3. Dispositif de coupure selon la revendication 1 ou 2, caractérisé en ce que deux chambres d'extinction d'arc (36,38) sont disposées de part et d'autre du barreau (40) le long de la direction longitudinale (34), avec interposition de parois (37) de subdivision ayant des orifices (35) de passage du contact mobile (14).3. Cut-off device according to claim 1 or 2, characterized in that two arc extinguishing chambers (36, 38) are arranged on either side of the bar (40) along the longitudinal direction (34 ), with interposition of walls (37) of subdivision having orifices (35) for passage of the movable contact (14). 4. Dispositif de coupure selon la revendication 2 ou 3, caractérisé en ce que les deux ressorts de positionnement du contact rotatif (14) sont formés par des ressorts de torsion (42,44) disposés symétriquement par rapport à la direction longitudinale (34) du pôle, l'une des extrémités de chaque ressort (42,44) étant accrochée au bras de levier (18,20) correspondant, et l'autre extrémité étant sollicitée élastiquement contre une saillie (50,54) du barreau (40).4. Cutting device according to claim 2 or 3, characterized in that the two positioning springs of the rotary contact (14) are formed by torsion springs (42,44) arranged symmetrically with respect to the longitudinal direction (34) of the pole, one end of each spring (42,44) being hooked to the corresponding lever arm (18,20), and the other end being elastically biased against a projection (50,54) of the bar (40) . 5. Dispositif de coupure selon la revendication 2 ou 3, caractérisé en ce que les deux ressorts de positionnement du contact rotatif (14) comportent des ressorts de traction (60,62) ou de compression (72,74) s'étendant parallèlement l'un à l'autre selon une direction oblique à la direction longitudinale (34).5. Cutting device according to claim 2 or 3, characterized in that the two positioning springs of the rotary contact (14) comprise tension (60,62) or compression (72,74) springs extending parallel l to each other in a direction oblique to the longitudinal direction (34). 6. Dispositif de coupure selon l'une des revendications 1 à 5, caractérisé en ce que les plages (30,32) de support des contacts fixes (26,28) sont conformées en boucle pour engendrer un effet de répulsion électrodynamique au début de la séparation des contacts du disjoncteur.6. Cut-off device according to one of claims 1 to 5, characterized in that the pads (30,32) for supporting the fixed contacts (26,28) are shaped in a loop to generate an electrodynamic repulsion effect at the start of separation of the circuit breaker contacts.
EP88402559A 1987-10-26 1988-10-11 Opening device for a multipole circuit breaker with a rotating contact bridge Expired - Lifetime EP0314540B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8714964 1987-10-26
FR8714964A FR2622347B1 (en) 1987-10-26 1987-10-26 CUTTING DEVICE FOR A MULTIPOLAR CIRCUIT BREAKER WITH DOUBLE ROTARY CONTACT

Publications (2)

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EP0314540A1 true EP0314540A1 (en) 1989-05-03
EP0314540B1 EP0314540B1 (en) 1993-09-29

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EP88402559A Expired - Lifetime EP0314540B1 (en) 1987-10-26 1988-10-11 Opening device for a multipole circuit breaker with a rotating contact bridge

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US (1) US4910485A (en)
EP (1) EP0314540B1 (en)
JP (1) JP2666828B2 (en)
DE (1) DE3884557T2 (en)
ES (1) ES2046322T3 (en)
FR (1) FR2622347B1 (en)

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EP0174904A1 (en) * 1984-08-23 1986-03-19 Siemens Aktiengesellschaft Contact device for a low voltage circuit breaker with a two-armed contact lever

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EP0406130A1 (en) * 1989-06-26 1991-01-02 Merlin Gerin Limiting circuit-breaker provided with electromagnetic means for delaying the return movement of the contact
FR2648952A1 (en) * 1989-06-26 1990-12-28 Merlin Gerin LIMITING CIRCUIT BREAKER HAVING AN ELECTROMAGNETIC EFFECT CONTACT DELAY RETARDER
US5281776A (en) * 1991-10-15 1994-01-25 Merlin Gerin Multipole circuit breaker with single-pole units
FR2682531A1 (en) * 1991-10-15 1993-04-16 Merlin Gerin Multi-pole circuit breaker with single-pole units
EP0542636A1 (en) * 1991-10-15 1993-05-19 Schneider Electric Sa Multipole circuit-breaker being composed of single-pole units
AU659219B2 (en) * 1991-10-15 1995-05-11 Schneider Electric Sa Multipole circuit breaker with single-pole units
EP0560697A1 (en) * 1992-03-13 1993-09-15 Schneider Electric Sa Moulded-case circuit breaker with retardation at the end of the contact bridges repulsion movement
EP0560696A1 (en) * 1992-03-13 1993-09-15 Schneider Electric Sa Contact for moulded case circuit breaker
FR2688625A1 (en) * 1992-03-13 1993-09-17 Merlin Gerin CONTACT OF A MOLDED BOX CIRCUIT BREAKER.
US5310971A (en) * 1992-03-13 1994-05-10 Merlin Gerin Molded case circuit breaker with contact bridge slowed down at the end of repulsion travel
US5313180A (en) * 1992-03-13 1994-05-17 Merlin Gerin Molded case circuit breaker contact
FR2688626A1 (en) * 1992-03-13 1993-09-17 Merlin Gerin CIRCUIT BREAKER WITH MOLDED BOX HAVING A BRIDGE OF BRAKE CONTACTS AT THE END OF REPULSION STROKE
US5534832A (en) * 1993-03-25 1996-07-09 Telemecanique Switch
FR2703185A1 (en) * 1993-03-25 1994-09-30 Telemecanique Electromagnetic switch apparatus
EP0617449A1 (en) * 1993-03-25 1994-09-28 Schneider Electric Sa Switching apparatus
WO1995008837A1 (en) * 1993-09-24 1995-03-30 Schneider Electric S.A. Switching apparatus
FR2710453A1 (en) * 1993-09-24 1995-03-31 Telemecanique Contactor-circuit breaker device.
WO1998005053A1 (en) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Current-limiting power circuit-breaker
WO1998005049A1 (en) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Switching chamber housing for a power switch and housing modules for producing such a switching chamber housing
US6087609A (en) * 1996-07-27 2000-07-11 Kloeckner-Moeller-Gmbh Circuit breaker, arcing chamber housing for a circuit breaker and housing module for an arcing chamber housing
EP0961306A3 (en) * 1998-05-26 2000-06-28 AEG Niederspannungstechnik GmbH & Co. KG Circuit braker provided with modular contact system for different frame sizes
EP0961306A2 (en) * 1998-05-26 1999-12-01 AEG Niederspannungstechnik GmbH & Co. KG Circuit braker provided with modular contact system for different frame sizes
WO2001006529A1 (en) * 1999-07-17 2001-01-25 Moeller Gmbh Contact system comprising a contact arm with two arms
US6403901B1 (en) 1999-07-17 2002-06-11 Moeller Gmbh Spring biased contact system including a rotatable symmetrical contact with two lever arms
WO2001006530A1 (en) * 1999-07-20 2001-01-25 Aeg Niederspannungstechnik Gmbh & Co. Kg Displaceable contact having low electrical resistance
EP1079409A1 (en) * 1999-08-27 2001-02-28 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
EP1098343A1 (en) * 1999-11-03 2001-05-09 AEG Niederspannungstechnik GmbH & Co. KG Circuit breaker rotary contact arm arrangement
WO2002041345A1 (en) * 2000-11-16 2002-05-23 Moeller Gmbh Contact arrangement for current-limiting protective circuit breakers
WO2002041346A1 (en) * 2000-11-16 2002-05-23 Moeller Gmbh Contact arrangement for current-limiting protective circuit breakers
WO2002041347A1 (en) * 2000-11-16 2002-05-23 Moeller Gmbh Contact arrangement for current-limiting protective circuit breakers
FR2818003A1 (en) * 2000-12-09 2002-06-14 Moeller Gmbh SWITCHING DEVICE HAVING A DOUBLE-CUTTING FLOATING MOUNTED ROTATING CONTACT
EP1302960A2 (en) * 2001-10-12 2003-04-16 Moeller GmbH Contact arrangement for current limiting circuit breaker
EP1302960A3 (en) * 2001-10-12 2005-03-16 Moeller GmbH Contact arrangement for current limiting circuit breaker
US7221246B2 (en) 2005-01-07 2007-05-22 General Electric Company Split rotor system and method with springs
WO2007088080A1 (en) * 2006-01-31 2007-08-09 Siemens Aktiengesellschaft Contact system for electrical switchgear
WO2010139185A1 (en) 2009-06-05 2010-12-09 上海诺雅克电气有限公司 Multiple pole breaker with auxiliary supporting pieces
WO2011058120A1 (en) * 2009-11-12 2011-05-19 Eaton Industries Gmbh Rotative double contact
US9136067B2 (en) 2009-11-12 2015-09-15 Eaton Industries Gmbh Rotative double contact
CN102623265A (en) * 2011-01-06 2012-08-01 通用电气公司 Circuit interruption device and method of assembly
CN102623265B (en) * 2011-01-06 2016-06-08 通用电气公司 Circuit interrupting device and assemble method
US20150077199A1 (en) * 2012-03-28 2015-03-19 Larsen & Toubro Limited Double break contact system for moulded case circuit breakers
US9508495B2 (en) * 2012-03-28 2016-11-29 Larsen & Tourbo Limited Double break contact system for moulded case circuit breakers
US10424453B2 (en) * 2017-02-21 2019-09-24 Lsis Co., Ltd. Circuit breaker having circuit operating device

Also Published As

Publication number Publication date
JPH01166429A (en) 1989-06-30
ES2046322T3 (en) 1994-02-01
DE3884557D1 (en) 1993-11-04
DE3884557T2 (en) 1994-05-05
US4910485A (en) 1990-03-20
FR2622347B1 (en) 1995-04-14
FR2622347A1 (en) 1989-04-28
JP2666828B2 (en) 1997-10-22
EP0314540B1 (en) 1993-09-29

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