EP1085610A1 - Aluminum connecting clamp for an electrical apparatus especially for a fuse - Google Patents

Aluminum connecting clamp for an electrical apparatus especially for a fuse Download PDF

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Publication number
EP1085610A1
EP1085610A1 EP00410105A EP00410105A EP1085610A1 EP 1085610 A1 EP1085610 A1 EP 1085610A1 EP 00410105 A EP00410105 A EP 00410105A EP 00410105 A EP00410105 A EP 00410105A EP 1085610 A1 EP1085610 A1 EP 1085610A1
Authority
EP
European Patent Office
Prior art keywords
contact
connection clamp
clamp according
stud
terminal
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.)
Withdrawn
Application number
EP00410105A
Other languages
German (de)
French (fr)
Inventor
Philippe Schneider Elec. Ind. SA Blochouse
Grégoire Schneider Elec. Ind. SA Brun
Stéphane Schneider Elec. Ind. SA Bure
Stéphane Schneider Elec. Ind. SA Lamy
Eric Schneider Elec. Ind. SA Lebos
Alain Schneider Elec. Ind. SA Peccave
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1085610A1 publication Critical patent/EP1085610A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22—End pieces terminating in a spring clip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H85/203—Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/47—Means for cooling
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • the clamps commonly used for the connection of high-caliber fuses, especially for intensities of the order of 400 A, are made from a sheet of copper, cut and folded to form a first clamp with main contacts for the passage of the nominal current, and a second clamp provided with arcing contacts.
  • the two clamps are joined to a common U-shaped base, and the contact pressure is ensured by circular springs in the form of circlips acting on the branches elastic of the first clamp.
  • the cost of manufacturing such pliers is relatively high, and the heat absorption due to the passage of the current remains very limited.
  • the object of the invention is to make a connection clamp for an apparatus electric high caliber, with optimum heat dissipation, and cost reduced manufacturing.
  • the internal face of the yoke is inclined relative to in the longitudinal direction so as to form a convergent with the yoke of the other contact element.
  • Each contact element has a rectangular section, and includes on the external surface a groove located between the fins and the fixing base for anchoring a double spring.
  • the contact surface is advantageously provided with grooves to promote electrical contact with the knife-shaped terminal.
  • One of the studs are made of copper or a copper alloy, while the other stud is made of material insulating, so as to transfer the arc zone to the first pad playing the role of contact arc.
  • the mounting base of each contact element is curved with respect to the flat range of the starting conductor to allow spreading and closing movements during the racking-in and terminal removal.
  • the two contact elements are provided with stops arranged under the contact surfaces and coming into engagement with each other to delimit a first transverse interval between the studs.
  • each contact element is divided into at least two adjacent parts separated from each other by a second interval extending perpendicular to the first interval so as to constitute a clamp multiple contacts.
  • connection clamp 10 for a high-caliber fuse 12 is composed of two elongated contact elements 14, 16, arranged opposite one of the other in symmetry with respect to the longitudinal median plane. The posterior ends of the two contact elements 14, 16 are secured to an attachment pad 18 of a starting conductor 20.
  • the contact elements 14, 16 have identical structures constituted by aluminum bars, advantageously made by spinning, and subject to a nickel or silver based surface treatment.
  • Each contact element 14, 16 of rectangular section has a contact surface 22 substantially convex and grooved, disposed in the internal median part between a stop 24, 25 and a stud 26, 27, the latter constituting a spark gap for the contact element 14 on the left, and a spark gap for the contact element 16 on the right.
  • the part anterior terminal above the stud 16 is capped by a yoke 28 of insulating material, for example based on polyamide, serving as an abrupt latching member at the entry of the connection clamp.
  • the internal faces of the two yokes 28 are inclined relative to the longitudinal direction so as to constitute a convergent at the entry of the clamp 10.
  • the grooves on the contact surface 22 promote electrical contact, and decrease the insertion and extraction effort of the knife-shaped terminal 29 of the fuse 12.
  • the convex shape of the two contact surfaces 22 allow any defect to be absorbed of alignment of the terminal 29 with respect to the clamp 10.
  • each contact element 14, 16 is provided with a series of fins 30 of heat dissipation, extending opposite the stud 26, 27 between the yoke 28 and a groove 32 in which the end strands of two springs 34 of contact pressure.
  • Each spring has a U shape extended by two legs ends bent at right angles. The presence of this double spring guarantees a distribution uniform contact pressure of the clamp 10 on the terminal 29 in the inserted position.
  • each contact element 14, 16 is provided with a base 36 substantially curved, and fitted with a tapped hole into which at least one screw is screwed 38 allowing the mounting of the contact elements 14, 16 on the attachment pad 18 of the conductor 20.
  • a compression spring 40 is interposed between track 18 and the head of each screw 38, so as to allow a slight movement of separation of the elements of contact 14, 16 when entering or exiting terminal 29.
  • the entry into engagement of respective stops 24, 25 prevents the contact elements 14, 16 from coming together at the inlet of the clamp 10, and permanently maintains a transverse gap 42 between the studs 26, 27.
  • the stud 26 constituting the spark gap on the left contact element 14 is made of copper, or a tellurium copper alloy, intended to resist welding solder.
  • the other stud 27 constituting the counter-spark gap of the second contact element 16 is produced advantageously in insulating material, for example polyamide, so as to defer permanently the arc zone on the pad 26, which plays the role of arcing contact. It's clear that the stud 27 could also be conductive like the stud 26.
  • connection clamp 10 The operation of the connection clamp 10 according to FIGS. 1 to 4 is as follows:
  • the spacing between the pads 26, 27 is less than the thickness of the terminal 29, and the interval between the two contact surfaces 22.
  • the double spring 34 and the engagement of the stops 24, 25 maintain the two contact surfaces 22 substantially parallel to each other, and perpendicular to the attachment range 18.
  • the studs 26, 27 remain permanently projecting relative to the converging of the yokes 28.
  • terminal 29 of fuse 12 is inserted between the two contact surfaces 22, and the double spring 34 ensures a uniform distribution of the pressure of contact.
  • the mechanical reaction generated during the terminal 29 insertion phase causes a slight movement of separation of the contact elements 14, 16 following the pivoting in the opposite direction of the bases 36 on the attachment range 18 of the conductor 20.
  • the current of fuse 12 is split in two in contact elements 14, 16, and the effect
  • the corresponding Joule is evacuated by the fins 30 for heat dissipation.
  • the presence of insulating yokes 28 at the entry of the clamp 10 allows an abrupt engagement under tension, the arc occurring exclusively between the stud 26 and the terminal 29 without migration on the contact elements 14, 16 made of aluminum.
  • FIGS. 5 and 6 show a multiple contact clamp 100, in which each element contact 114, 116 is divided into two parts 114a, 114b; 116a, 116b adjacent, separate from each other by an interval 142 extending perpendicular to the interval 42. It is clear that the contact elements 114, 116 could be subdivided into three or four parts equal depending on the size of the switchgear, and the maximum temperature rise allowed.

Landscapes

  • Fuses (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

Connection clamp (10) has two contacting jaws (14,16) each with a contacting face (22), a contact block (26,27) complete with a plastic cover (28) and cooling fins (30).

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à une pince de connexion pour une borne d'appareillage électrique, comprenant :

  • au moins deux éléments de contact symétriques destinés à s'embrocher sur ladite borne, et ayant des contacts principaux pour le passage du courant nominal, et des contacts d'arc jouant le rôle de pince éclateur,
  • et des moyens élastiques pour assurer une pression de contact sur la borne.
The invention relates to a connection clamp for an electrical equipment terminal, comprising:
  • at least two symmetrical contact elements intended to be plugged onto said terminal, and having main contacts for the passage of the nominal current, and arcing contacts playing the role of spark gap clamp,
  • and elastic means for ensuring contact pressure on the terminal.

Etat de la techniqueState of the art

Les pinces utilisées couramment pour la connexion des fusibles de calibres élevés, notamment pour des intensités de l'ordre de 400 A, sont réalisées à partir d'une tôle de cuivre, découpée et pliée pour former une première pince munie de contacts principaux pour le passage du courant nominal, et une deuxième pince pourvue de contacts d'arc. Les deux pinces sont réunies à une embase commune en forme de U, et la pression des contact est assurée par des ressorts circulaires en forme de circlips agissant sur les branches élastiques de la première pince. Le coût de fabrication de telles pinces est relativement élevé, et l'absorption calorifique due au passage du courant reste très limitée.The clamps commonly used for the connection of high-caliber fuses, especially for intensities of the order of 400 A, are made from a sheet of copper, cut and folded to form a first clamp with main contacts for the passage of the nominal current, and a second clamp provided with arcing contacts. The two clamps are joined to a common U-shaped base, and the contact pressure is ensured by circular springs in the form of circlips acting on the branches elastic of the first clamp. The cost of manufacturing such pliers is relatively high, and the heat absorption due to the passage of the current remains very limited.

Objet de l'inventionSubject of the invention

L'objet de l'invention consiste à réaliser une pince de connexion pour un appareillage électrique de calibres élevés, bénéficiant d'une dissipation thermique optimum, et d'un coût de fabrication réduit.The object of the invention is to make a connection clamp for an apparatus electric high caliber, with optimum heat dissipation, and cost reduced manufacturing.

La pince de connexion selon l'invention est caractérisée en ce que les deux éléments de contact sont constitués par des barrettes en aluminium, comportant chacune:

  • une surface de contact convexe disposée dans la partie médiane interne entre l'embase de fixation à la partie postérieure, et un plot saillant jouant le rôle d'éclateur,
  • une chape en matière isolante coiffant la partie antérieure au-dessus du plot pour former un organe d'enclenchement brusque à l'entrée de la pince,
  • et des ailettes de dissipation thermique réparties sur la surface externe à l'opposé du plot.
The connection clamp according to the invention is characterized in that the two contact elements consist of aluminum bars, each comprising:
  • a convex contact surface disposed in the internal median part between the fixing base to the posterior part, and a protruding stud acting as a spark gap,
  • a yoke of insulating material covering the front part above the stud to form a snap engagement member at the entrance of the clamp,
  • and heat dissipation fins distributed on the external surface opposite the stud.

Selon un mode de réalisation préférentiel, la face interne de la chape est inclinée par rapport à la direction longitudinale de manière à constituer un convergent avec la chape de l'autre élément de contact. Chaque élément de contact possède une section rectangulaire, et comprend sur la surface externe une rainure située entre les ailettes et l'embase de fixation pour l'ancrage d'un ressort double. La surface de contact est pourvue avantageusement de cannelures pour favoriser le contact électrique avec la borne en forme de couteau. L'un des plots est en cuivre ou en alliage de cuivre, tandis que l'autre plot est réalisé en matière isolante, de manière à reporter la zone d'arc sur le premier plot jouant le rôle de contact d'arc.According to a preferred embodiment, the internal face of the yoke is inclined relative to in the longitudinal direction so as to form a convergent with the yoke of the other contact element. Each contact element has a rectangular section, and includes on the external surface a groove located between the fins and the fixing base for anchoring a double spring. The contact surface is advantageously provided with grooves to promote electrical contact with the knife-shaped terminal. One of the studs are made of copper or a copper alloy, while the other stud is made of material insulating, so as to transfer the arc zone to the first pad playing the role of contact arc.

Selon une caractéristique de l'invention, l'embase de fixation de chaque élément de contact est incurvée par rapport à la plage plane du conducteur de départ pour autoriser des mouvements d'écartement et de rapprochement lors des phases d'embrochage et de débrochage de la borne.According to a characteristic of the invention, the mounting base of each contact element is curved with respect to the flat range of the starting conductor to allow spreading and closing movements during the racking-in and terminal removal.

Selon une autre caractéristique de l'invention, les deux éléments de contact sont dotés de butées agencées sous les surfaces de contact et venant en engagement l'une avec l'autre pour délimiter un premier intervalle transversal entre les plots.According to another characteristic of the invention, the two contact elements are provided with stops arranged under the contact surfaces and coming into engagement with each other to delimit a first transverse interval between the studs.

En fonction du calibre et de l'échauffement toléré, chaque élément de contact est divisé en au moins deux parties adjacentes séparées l'une de l'autre par un deuxième intervalle s'étendant perpendiculairement au premier intervalle de manière à constituer une pince à contacts multiple. Depending on the size and the temperature rise tolerated, each contact element is divided into at least two adjacent parts separated from each other by a second interval extending perpendicular to the first interval so as to constitute a clamp multiple contacts.

Description sommaire des dessinsBrief description of the drawings

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en perspective d'une pince de connexion selon l'invention;
  • la figure 2 montre une vue éclatée en perspective d'un ensemble pince et conducteur de départ avant l'embrochage du fusible;
  • la figure 3 est une vue identique de la figure 2 après embrochage du fusible;
  • la figure 4 représente une vue en élévation de la pince selon la figure 1;
  • la figure 5 montre une vue en perspective d'une autre pince à contacts multiple;
  • la figure 6 est une vue de profil de la figure 5.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawings in which:
  • Figure 1 is a schematic perspective view of a connection clamp according to the invention;
  • FIG. 2 shows an exploded perspective view of a clamp and starting conductor assembly before the fuse is plugged in;
  • Figure 3 is an identical view to Figure 2 after plugging in the fuse;
  • Figure 4 shows an elevational view of the clamp according to Figure 1;
  • Figure 5 shows a perspective view of another multiple contact clamp;
  • FIG. 6 is a side view of FIG. 5.

Description d'un mode de réalisation préférentielDescription of a preferred embodiment

En référence aux figures 1 à 4, une pince de connexion 10 d'un fusible 12 à calibres élevés, est composée de deux éléments de contact 14, 16 allongés, disposés en regard l'un de l'autre en symétrie par rapport au plan médian longitudinal. Les extrémités postérieures des deux éléments de contact 14, 16 sont solidarisées à une plage de fixation 18 d'un conducteur de départ 20.With reference to FIGS. 1 to 4, a connection clamp 10 for a high-caliber fuse 12, is composed of two elongated contact elements 14, 16, arranged opposite one of the other in symmetry with respect to the longitudinal median plane. The posterior ends of the two contact elements 14, 16 are secured to an attachment pad 18 of a starting conductor 20.

Les éléments de contact 14, 16 présentent des structures identiques constitués par des barrettes en aluminium, réalisées avantageusement par filage, et faisant l'objet d'un traitement de surface à base de nickel ou d'argent.The contact elements 14, 16 have identical structures constituted by aluminum bars, advantageously made by spinning, and subject to a nickel or silver based surface treatment.

Chaque élément de contact 14, 16 de section rectangulaire, comporte une surface de contact 22 sensiblement convexe et cannelée, disposée dans la partie médiane interne entre une butée 24, 25 et un plot 26, 27, ce dernier constituant un éclateur pour l'élément de contact 14 de gauche, et un contre-éclateur pour l'élément de contact 16 de droite. La partie terminale antérieure au-dessus du plot 16, est coiffée par une chape 28 en matière isolante, par exemple à base de polyamide, servant d'organe d'enclenchement brusque à l'entrée de la pince de connexion. Les faces internes des deux chapes 28 sont inclinées par rapport à la direction longitudinale de manière à constituer un convergent à l'entrée de la pince 10.Each contact element 14, 16 of rectangular section, has a contact surface 22 substantially convex and grooved, disposed in the internal median part between a stop 24, 25 and a stud 26, 27, the latter constituting a spark gap for the contact element 14 on the left, and a spark gap for the contact element 16 on the right. The part anterior terminal above the stud 16, is capped by a yoke 28 of insulating material, for example based on polyamide, serving as an abrupt latching member at the entry of the connection clamp. The internal faces of the two yokes 28 are inclined relative to the longitudinal direction so as to constitute a convergent at the entry of the clamp 10.

Les cannelures sur la surface de contact 22 favorisent le contact électrique, et diminuent l'effort d'insertion et d'extraction de la borne 29 en forme de couteau du fusible 12. La forme convexe des deux surfaces de contact 22 permettent d'absorber tout défaut d'alignement de la borne 29 par rapport à la pince 10.The grooves on the contact surface 22 promote electrical contact, and decrease the insertion and extraction effort of the knife-shaped terminal 29 of the fuse 12. The convex shape of the two contact surfaces 22 allow any defect to be absorbed of alignment of the terminal 29 with respect to the clamp 10.

La face latérale externe de chaque élément de contact 14, 16 est dotée d'une série d'ailettes 30 de dissipation thermique, s'étendant à l'opposé du plot 26, 27 entre la chape 28 et une rainure 32 dans laquelle sont logés bout à bout les brins d'extrémités de deux ressorts 34 de pression de contact. Chaque ressort a une forme en U prolongée par deux pattes d'extrémités pliées en équerre. La présence de ce ressort double garantit une répartition uniforme de la pression de contact de la pince 10 sur la borne 29 en position insérée.The external lateral face of each contact element 14, 16 is provided with a series of fins 30 of heat dissipation, extending opposite the stud 26, 27 between the yoke 28 and a groove 32 in which the end strands of two springs 34 of contact pressure. Each spring has a U shape extended by two legs ends bent at right angles. The presence of this double spring guarantees a distribution uniform contact pressure of the clamp 10 on the terminal 29 in the inserted position.

La partie postérieure de chaque élément de contact 14, 16 est pourvue d'une embase 36 sensiblement incurvée, et équipée d'un trou taraudé dans lequel est vissée au moins une vis 38 permettant le montage des éléments de contact 14, 16 sur la plage de fixation 18 du conducteur 20. Un ressort 40 de compression est interposé entre la plage 18 et la tête de chaque vis 38, de manière à autoriser un léger mouvement d'écartement des éléments de contact 14, 16 lors de l'entrée ou de la sortie de la borne 29. La venue en engagement des butées 24, 25 respectives évite le rapprochement des éléments de contact 14, 16 à l'entrée de la pince 10, et maintient en permanence un intervalle 42 transversal entre les plots 26, 27.The rear part of each contact element 14, 16 is provided with a base 36 substantially curved, and fitted with a tapped hole into which at least one screw is screwed 38 allowing the mounting of the contact elements 14, 16 on the attachment pad 18 of the conductor 20. A compression spring 40 is interposed between track 18 and the head of each screw 38, so as to allow a slight movement of separation of the elements of contact 14, 16 when entering or exiting terminal 29. The entry into engagement of respective stops 24, 25 prevents the contact elements 14, 16 from coming together at the inlet of the clamp 10, and permanently maintains a transverse gap 42 between the studs 26, 27.

Le plot 26 constituant l'éclateur sur l'élément de contact 14 de gauche, est réalisé en cuivre, ou en alliage de cuivre au tellure, destiné à résister aux amorces de soudure. L'autre plot 27 constituant le contre-éclateur du deuxième élément de contact 16 est réalisé avantageusement en matière isolante, par exemple en polyamide, de manière à reporter en permanence la zone d'arc sur le plot 26, lequel joue le rôle de contact d'arc. Il est clair que le plot 27 pourrait également être conducteur comme le plot 26.The stud 26 constituting the spark gap on the left contact element 14 is made of copper, or a tellurium copper alloy, intended to resist welding solder. The other stud 27 constituting the counter-spark gap of the second contact element 16 is produced advantageously in insulating material, for example polyamide, so as to defer permanently the arc zone on the pad 26, which plays the role of arcing contact. It's clear that the stud 27 could also be conductive like the stud 26.

Le fonctionnement de la pince de connexion 10 selon les figures 1 à 4 est le suivant:The operation of the connection clamp 10 according to FIGS. 1 to 4 is as follows:

Dans la position débrochée de la pince 10 illustrée aux figures 1 et 4, l'écartement entre les plots 26, 27 est inférieur à l'épaisseur de la borne 29, et à l'intervalle ménagé entre les deux surfaces de contact 22. Le ressort double 34 et la venue en engagement des butées 24, 25 maintiennent les deux surfaces de contact 22 sensiblement parallèles entre elles, et perpendiculaires à la plage de fixation 18. Les plots 26, 27 restent en permanence en saillie par rapport au convergent des chapes 28.In the withdrawn position of the clamp 10 illustrated in FIGS. 1 and 4, the spacing between the pads 26, 27 is less than the thickness of the terminal 29, and the interval between the two contact surfaces 22. The double spring 34 and the engagement of the stops 24, 25 maintain the two contact surfaces 22 substantially parallel to each other, and perpendicular to the attachment range 18. The studs 26, 27 remain permanently projecting relative to the converging of the yokes 28.

En position embrochée ( figure 3), la borne 29 du fusible 12 est insérée entre les deux surfaces de contact 22, et le ressort double 34 assure une répartition uniforme de la pression de contact. La réaction mécanique engendrée lors de la phase d'insertion de la borne 29 provoque un léger mouvement d'écartement des éléments de contact 14, 16 suite au pivotement de sens contraire des embases 36 sur la plage de fixation 18 du conducteur 20. Le courant du fusible 12 est partagé en deux dans les éléments de contact 14, 16, et l'effet Joule correspondant est évacué par les ailettes 30 de dissipation thermique. La présence des chapes 28 isolantes à l'entrée de la pince 10 permet un enclenchement brusque sous tension, l'arc se produisant exclusivement entre le plot 26 et la borne 29 sans migration sur les éléments de contact 14, 16 en aluminium.In the plugged-in position (Figure 3), terminal 29 of fuse 12 is inserted between the two contact surfaces 22, and the double spring 34 ensures a uniform distribution of the pressure of contact. The mechanical reaction generated during the terminal 29 insertion phase causes a slight movement of separation of the contact elements 14, 16 following the pivoting in the opposite direction of the bases 36 on the attachment range 18 of the conductor 20. The current of fuse 12 is split in two in contact elements 14, 16, and the effect The corresponding Joule is evacuated by the fins 30 for heat dissipation. The presence of insulating yokes 28 at the entry of the clamp 10 allows an abrupt engagement under tension, the arc occurring exclusively between the stud 26 and the terminal 29 without migration on the contact elements 14, 16 made of aluminum.

Lors du débrochage intervenant notamment pour le remplacement d'un fusible défectueux, le retrait de la borne 29 dans le sens de la flèche F (figure 3) provoque un rapprochement des surfaces de contact 22 dès que la borne 29 quitte les plots 26, 27. Si la manoeuvre est opérée sous tension, l'arc s'établit uniquement sur le plot 26 servant de contact d'arc.When racking-out occurs, in particular for the replacement of a defective fuse, the removal of terminal 29 in the direction of arrow F (Figure 3) causes a reconciliation contact surfaces 22 as soon as terminal 29 leaves studs 26, 27. If the operation is operated under voltage, the arc is established only on the stud 26 serving as arcing contact.

Les figures 5 et 6 montrent une pince 100 à contact multiple, dans laquelle chaque élément de contact 114, 116 est divisé en deux parties 114a, 114b; 116a, 116b adjacentes, séparées l'une de l'autre par un intervalle 142 s'étendant perpendiculairement à l'intervalle 42. Il est clair que les éléments de contact 114, 116 pourrait être subdivisé en trois ou quatre parties égales en fonction du calibre de l'appareillage, et de l'échauffement maximum toléré.FIGS. 5 and 6 show a multiple contact clamp 100, in which each element contact 114, 116 is divided into two parts 114a, 114b; 116a, 116b adjacent, separate from each other by an interval 142 extending perpendicular to the interval 42. It is clear that the contact elements 114, 116 could be subdivided into three or four parts equal depending on the size of the switchgear, and the maximum temperature rise allowed.

Claims (10)

Pince de connexion pour une borne (29) d'appareillage électrique, comprenant : au moins deux éléments de contact (14, 16; 114, 116) symétriques destinés à s'embrocher sur ladite borne, et ayant des contacts principaux pour le passage du courant nominal, et des contacts d'arc jouant le rôle de pince éclateur, et des moyens élastiques pour assurer une pression de contact sur la borne (29), caractérisée en ce que les deux éléments de contact (14, 16; 114, 116) sont constitués par des barrettes en aluminium, comportant chacune: une surface de contact (22) convexe disposée dans la partie médiane interne entre l'embase de fixation (36) à la partie postérieure, et un plot (26, 27) saillant jouant le rôle d'éclateur, une chape (28) en matière isolante coiffant la partie antérieure au-dessus du plot (26, 27) pour former un organe d'enclenchement brusque à l'entrée de la pince (10, 100), et des ailettes (30) de dissipation thermique réparties sur la surface externe à l'opposé du plot (26, 27). Connection clamp for a terminal (29) of electrical equipment, comprising: at least two symmetrical contact elements (14, 16; 114, 116) intended to be plugged into said terminal, and having main contacts for the passage of the nominal current, and arcing contacts playing the role of spark gap pliers, and elastic means for ensuring contact pressure on the terminal (29), characterized in that the two contact elements (14, 16; 114, 116) consist of aluminum bars, each comprising: a convex contact surface (22) disposed in the internal central part between the fixing base (36) at the rear part, and a protruding stud (26, 27) playing the role of spark gap, a yoke (28) made of insulating material covering the front part above the stud (26, 27) to form an abrupt latching member at the entrance to the clamp (10, 100), and heat dissipation fins (30) distributed over the external surface opposite the stud (26, 27). Pince de connexion selon la revendication 1, caractérisée en ce que la face interne de la chape (28) est inclinée par rapport à la direction longitudinale de manière à constituer un convergent avec la chape de l'autre élément de contact.Connection clamp according to claim 1, characterized in that the internal face of the yoke (28) is inclined relative to the longitudinal direction so as to constitute a convergent with the yoke of the other contact element. Pince de connexion selon la revendication 1, caractérisée en ce que chaque élément de contact (14, 16; 114, 116) possède une section rectangulaire, et comprend sur la surface externe une rainure (32) située entre les ailettes (30) et l'embase de fixation (36) pour l'ancrage d'un ressort double (34).Connection clamp according to claim 1, characterized in that each element of contact (14, 16; 114, 116) has a rectangular section, and comprises on the external surface a groove (32) located between the fins (30) and the fixing base (36) for anchoring a double spring (34). Pince de connexion selon la revendication 1, caractérisée en ce que la surface de contact (22) est pourvue de cannelures pour favoriser le contact électrique avec la borne (29) en forme de couteau. Connection clamp according to claim 1, characterized in that the surface of contact (22) is provided with grooves to promote electrical contact with the knife-shaped terminal (29). Pince de connexion selon la revendication 1, caractérisée en ce que l'embase de fixation (36) de chaque élément de contact (14, 16; 114, 116) est incurvée par rapport à la plage (18) plane du conducteur de départ (20) pour autoriser des mouvements d'écartement et de rapprochement lors des phases d'embrochage et de débrochage de la borne (29).Connection clamp according to claim 1, characterized in that the base of fixing (36) of each contact element (14, 16; 114, 116) is curved relative to the flat area (18) of the starting conductor (20) to allow movements spacing and reconciliation during the racking-in and racking-out phases of the terminal (29). Pince de connexion selon la revendication 5, caractérisée en ce que les deux éléments de contact (14, 16; 114, 116) sont dotés de butées (24, 25) agencées sous les surfaces de contact (22) et venant en engagement l'une avec l'autre pour délimiter un premier intervalle (42) transversal entre les plots (26, 27).Connection clamp according to claim 5, characterized in that the two elements contact (14, 16; 114, 116) are provided with stops (24, 25) arranged under the surfaces contact (22) and coming into engagement with each other to delimit a first transverse gap (42) between the studs (26, 27). Pince de connexion selon la revendication 5 ou 6, caractérisée en ce que l'embase (36) incurvée est solidarisée à la plage de fixation (18) au moyen de vis (38) avec interposition de ressorts de compression (40) autorisant un léger mouvement de pivotement des deux éléments de contact (14, 16; 114, 116) lors de l'embrochage ou du débrochage.Connection clamp according to claim 5 or 6, characterized in that the base (36) curved is secured to the fixing area (18) by means of screws (38) with interposition of compression springs (40) allowing a slight movement of pivoting of the two contact elements (14, 16; 114, 116) during racking-in or removal. Pince de connexion selon l'une quelconque des revendications précédentes, caractérisée en ce que l'un des plots (26) est en cuivre ou en alliage de cuivre, tandis que l'autre plot (27) est réalisé en matière isolante, de manière à reporter la zone d'arc sur le premier plot (26) jouant le rôle de contact d'arc.Connection clamp according to any one of the preceding claims, characterized in that one of the studs (26) is made of copper or a copper alloy, while that the other stud (27) is made of insulating material, so as to transfer the area arcing on the first stud (26) playing the role of arcing contact. Pince de connexion selon la revendication 3, caractérisée en ce que le ressort double (34) comporte deux ressorts en U ayant chacun deux pattes d'extrémités pliées en équerre.Connection clamp according to claim 3, characterized in that the double spring (34) comprises two U-shaped springs, each having two end tabs folded in square. Pince de connexion selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque élément de contact (114, 116) est divisé en au moins deux parties ( 114a, 114b; 116a, 116b) adjacentes séparées l'une de l'autre par un deuxième intervalle (142) s'étendant perpendiculairement au premier intervalle (42).Connection clamp according to any one of the preceding claims, characterized in that each contact element (114, 116) is divided into at least two adjacent parts (114a, 114b; 116a, 116b) separated from each other by a second interval (142) extending perpendicular to the first interval (42).
EP00410105A 1999-09-15 2000-08-30 Aluminum connecting clamp for an electrical apparatus especially for a fuse Withdrawn EP1085610A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911695 1999-09-15
FR9911695A FR2798515B1 (en) 1999-09-15 1999-09-15 ALUMINUM CONNECTION CLIP FOR ELECTRICAL EQUIPMENT, PARTICULARLY A FUSE

Publications (1)

Publication Number Publication Date
EP1085610A1 true EP1085610A1 (en) 2001-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00410105A Withdrawn EP1085610A1 (en) 1999-09-15 2000-08-30 Aluminum connecting clamp for an electrical apparatus especially for a fuse

Country Status (8)

Country Link
EP (1) EP1085610A1 (en)
CN (1) CN1157824C (en)
BR (1) BR0004167A (en)
DZ (1) DZ3092A1 (en)
EG (1) EG22168A (en)
FR (1) FR2798515B1 (en)
MA (1) MA25161A1 (en)
OA (1) OA11617A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2859575A1 (en) * 2003-09-10 2005-03-11 Cahors App Elec Fuse/electrical conductor connector having screw tightened conductor grip section and flexible strip attached section with heat dissipating wing parts held
EP2565890A1 (en) 2011-09-01 2013-03-06 Socomec S.A. Electrical switchgear with high making capacity
US8723627B2 (en) 2011-09-01 2014-05-13 Socomec, S.A. Electrical cut-off device with high electrodynamic resistance
US8993908B2 (en) 2011-09-01 2015-03-31 Socomec S.A. Moving contact-carrying carriage and electrical cut-off device equipped with such carriage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094011B (en) * 2013-02-25 2016-02-10 北京人民电器厂有限公司 A kind of electric connection structure of switching device
CN107731636A (en) * 2017-11-06 2018-02-23 温州三实电器有限公司 Contact base and bar shaped fuse base

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147014A1 (en) * 1971-07-23 1973-03-09 Gardy Particip App
FR2497005A1 (en) * 1980-12-18 1982-06-25 Wechsler Bernard Mains fuse holder or connector terminal - has spring biassed wheel element between two contact members to separate them during occurrence of arc
US4500162A (en) * 1982-04-12 1985-02-19 Marathon Electric Manufacturing Corporation Contact clip apparatus for blade-type contacts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147014A1 (en) * 1971-07-23 1973-03-09 Gardy Particip App
FR2497005A1 (en) * 1980-12-18 1982-06-25 Wechsler Bernard Mains fuse holder or connector terminal - has spring biassed wheel element between two contact members to separate them during occurrence of arc
US4500162A (en) * 1982-04-12 1985-02-19 Marathon Electric Manufacturing Corporation Contact clip apparatus for blade-type contacts

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2859575A1 (en) * 2003-09-10 2005-03-11 Cahors App Elec Fuse/electrical conductor connector having screw tightened conductor grip section and flexible strip attached section with heat dissipating wing parts held
EP2565890A1 (en) 2011-09-01 2013-03-06 Socomec S.A. Electrical switchgear with high making capacity
US8723627B2 (en) 2011-09-01 2014-05-13 Socomec, S.A. Electrical cut-off device with high electrodynamic resistance
US8859916B2 (en) 2011-09-01 2014-10-14 Socomec S.A. Electrical cut-off device with high making capacity
US8993908B2 (en) 2011-09-01 2015-03-31 Socomec S.A. Moving contact-carrying carriage and electrical cut-off device equipped with such carriage

Also Published As

Publication number Publication date
DZ3092A1 (en) 2004-06-20
BR0004167A (en) 2001-04-17
FR2798515B1 (en) 2001-11-09
CN1157824C (en) 2004-07-14
MA25161A1 (en) 2001-04-02
OA11617A (en) 2004-09-10
CN1288274A (en) 2001-03-21
EG22168A (en) 2002-09-30
FR2798515A1 (en) 2001-03-16

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