EP0033671A2 - Low-voltage multi-pole differential switch - Google Patents

Low-voltage multi-pole differential switch Download PDF

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Publication number
EP0033671A2
EP0033671A2 EP81400035A EP81400035A EP0033671A2 EP 0033671 A2 EP0033671 A2 EP 0033671A2 EP 81400035 A EP81400035 A EP 81400035A EP 81400035 A EP81400035 A EP 81400035A EP 0033671 A2 EP0033671 A2 EP 0033671A2
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EP
European Patent Office
Prior art keywords
contacts
contact
differential
switch according
differential switch
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
EP81400035A
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German (de)
French (fr)
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EP0033671B1 (en
EP0033671A3 (en
Inventor
Michel Bonniau
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
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Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0033671A2 publication Critical patent/EP0033671A2/en
Publication of EP0033671A3 publication Critical patent/EP0033671A3/en
Application granted granted Critical
Publication of EP0033671B1 publication Critical patent/EP0033671B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals

Definitions

  • a known switch of the kind mentioned (French Patent No. 2,282,715) comprises a bar carrying contact bridges, each of which cooperates with two fixed contacts to create a double break per pole.
  • the present invention is based on the observation that the contacts constitute critical points of the switches whose evolution is poorly controlled and whose contact resistance is a cause of heating by the Joule effect of the device.
  • the impact of the contacts on the cost of the device is not negligible, especially when the contacts include silver-based pads.
  • the invention aims to avoid the aforementioned drawbacks and to allow the production of an economical differential switch with improved performance.
  • each contact arm is elastically semi-fixed mounted on the bar to be able to perform a limited relative movement of pivoting and translation said arm extending on either side of the bar and carrying at one of its ends the movable contact capable of cooperating with the fixed fixed contact, the opposite end of the arm being connected by a braid to a terminal of the device and being capable of moving freely, a stop unidirectionally limiting the movement of said opposite end in the closing direction of the contacts.
  • the stop cooperating with the contact arm is in slight projection so that the contact arm comes at the end of the translational movement in abutment and subsequently pivots to close the contacts.
  • the insulating box of parallelepiped shape is formed by the superposition of a base, an intermediate support block and a shutter cover.
  • the intermediate block subdivides the interior of the case into two superimposed compartments, the upper one of which contains a first electrical sub-assembly sheet composed by the contacts, the relay and the trip mechanism and the contacts, and the other lower contains a second electrical sub-assembly, composed by the differential transformer crossed by conductors connecting the fixed contacts to the output terminals.
  • Said first and second sub-assemblies are pre-assembled outside the housing to group the electrical members of the different poles, then positioned and secured respectively on the opposite faces of the intermediate block.
  • said intermediate block comprises housings of connection terminals staggered along the two edges of the block parallel to the slide.
  • the integral terminals of the first sub-assembly are inserted from above into a series of housings, while the integral terminals of the second sub-assembly are inserted from below into the opposite housings.
  • the trigger mechanism is equipped with a contact position indicator actuated directly by the slide.
  • a low-voltage differential switch 10 is housed in a case 12 of molded insulating material formed by the superposition of a base 14, of a block Intermediate 16 supporting electric components and E- m-mechanical, and a cover 18 closing of the casing 12.
  • the invention is described with reference to a differential switch 10 connected in a four-pole three-phase system with neutral conductor (fig. 1 to 9), but it is obvious that it also applies to a bipolar differential switch used in a single-phase network with neutral (fig. 10 to 12).
  • the intermediate insulating block 16 comprises a transverse wall 20, extending parallel to the base of the base 14, and dividing the interior of the housing 10 into two compartments, the upper 22 directed towards the cover 18 for housing a switching chamber 24, a control mechanism 26 with an opening resaort and a polarized relay 28, the other lower 30, formed between the wall 20 and the base 14 for the arrangement of a toroidal differential transformer 32 for summing the currents flowing through the conductors of the switch 10.
  • the detection member of the differential tripping device consists of the toroidal transformer 32 whose measurement winding 34 is connected by conductors 36 to the control coil of the relay 28.
  • the movable pallet 36 of the latter cooperates with a locking lever 40 of a lock of the control mechanism 26 juxtaposed with a rotary handle 42 resettable movable between two extreme positions closing and opening.
  • a differential tripping device is usual and its operation can be summarized by signaling that an excitation of the relay 26 by the transformer 32 occurs during the appearance of a differential current in the conductors crossing the detection terminal, and causes pivoting of the locking lever 40 clockwise ( Figure 9b) causing the release of the mechanism 26 lock followed by the automatic release of the switch whose contacts open under the action of the spring d 'opening.
  • Rearmament of the lock is effected by pivoting the lever 42 of the m e - mechanism 26 to the closed position (fig 9a.) of the contacts.
  • a device for controlling and testing the operation of the differential protection by the transformer 32 is produced in a conventional manner by a branch circuit comprising in series a test resistor 44 and a salt switch (not shown) with test button 46. Pressing the test button 46 against its return spring causes the test switch to close, generating an artificial differential current detected by the transformer 32, which causes the switch to open. 10.
  • the test resistor 44 is housed in the lower compartment 30 inside a notch 48 formed in the intermediate block 16 (FIG. 3).
  • the test button 46 protrudes from the cover 18 through a square window located near a circular hole 50 for the introduction of the control handle 42. The latter comprises an operating pin 52 engaged in an orifice 54 of the mechanism 26 (fig. 1).
  • the differential trigger relay 28 and the associated control mechanism 26 are arranged in the upper compartment 24 on a common fixed plate 56 disposed on a cover 58 insulating shutter of the breaking chamber 24.
  • a switching bar 60 in the form of insulating slide is mounted in limited translation in the chamber 24 during a predetermined stroke between two extreme positions of closing and opening of the switch.
  • the displacement in translation of the bar 60 is effected by the intermediary of a transmission finger 62 of the mechanism 26 co-operating by interlocking with an actuating orifice 64 of the bar 60.
  • the transmission finger 62 is guided during the - said stroke in an oblong slot 66 of the mechanism 26, extending in the longitudinal direction of the sliding bar 60.
  • the switching bar 60 is equipped with four bridges of Contacts 68 of identical structures, spread to inter- v a ll are regular along the longitudinal direction in the housing 70 rectangular to the axis of rod 60.
  • the contact bridge 68 reotilinear of each pole extends perpendicular to the bar 60 and passes through the corresponding housing 70 while being held in place by a contact pressure spring 72, interposed between the middle part of the bridge 68 and the bottom of the housing 70
  • the interrupting chamber 24 is subdivided by intermediate partitions 74 (FIG. 4) into four juxtaposed spaces 76 staggered along the bar 60 and serving as housing for the contact bridges 68 of the different poles.
  • Each partition 74 perpendicular to the wall 20 is molded with the block 16 and has a central groove for housing the sliding bar 60.
  • each bridge 68 carries a contact pad constituting the movable contact 78 coming into engagement in the closed position of the switch with a fixed contact 80 secured to the corresponding partition 74.
  • the cut-off interval 82 formed between the separate contacts 80, 78 of each pole extends in the longitudinal direction along the same side of the bar 60 to the interior of the corresponding housing 70.
  • the other end of the bridge 68 electrically connected by a flexible connecting braid 86 to a pad 87 conducting a connection terminal 88 of the corresponding pole.
  • each terminal 88 is bent in a U, and mounted captive in a conductive cage provided with a fixing screw 90 resting on the base of the area 87 which simultaneously serves as a clamping plate for the electrical conductor held in the window of the terminal 88.
  • Each connection terminal 88 remains integral with the corresponding contact bridge 68, and is threaded by sliding into a housing 92 formed in the wall 20 of the intermediate block. 16.
  • Each fixed contact 80 is carried by a strip of not con- ction 94 which passes through the wall 20 and then extends trans- ve rsalement in the lower compartment 30.
  • the differential transformer the toroid 32 is traversed by primary conductive tors 96 connected respectively by their opposite ends to the bars 94 and to areas 97 of connection terminals 98 of the different poles.
  • Each terminal 98 of the cage type is inserted into a housing 100 of the intermediate block 16, and the corresponding pad 97 is shaped as a double square, the middle branch of which is arranged in the cage and serves as a clamping plate.
  • the housings 92, 100 of the current supply terminals 88, 98 extend along two opposite sides of the intermediate block 16 on either side of the switching rod 60.
  • the terminals 88, 98 of the same pole are aligned in a direction perpendicular to the bar 60 and parallel to the corresponding contact bridge 68.
  • the cover 18 of the housing 12 is provided with holes 102 for access to the terminal fixing screws 88, 98.
  • FIGS. 7a, 7b and 7c schematically show the operation of the switching bar 60 during its translational travel at a pole of the switch.
  • the contact bridge 68 is resiliently mounted in the housing 70 of the slide in the open position of the contacts 78, 80 (fig. 7a).
  • the heel of the bridge 68 opposite the contact 78 abuts in an intermediate position against a fixed shoulder 104 of the wall 74 of the insulating block 16 before the contacts 76, 80 are closed (fig. 7b).
  • the continued closing stroke of the consutation bar 60 then causes the contacts to close (fig. 7c) and a correct contact pressure by compression of the spring 72 associated with the bridge 68.
  • a reverse opening movement causes, during bonding of the contacts, a breakout by pivoting, the bridge 68 constituting a force multiplier lever.
  • the intermediate block 16 serves as a support for two pre-assembled sub-assemblies A and B grouping together the electrical members of the different poles.
  • the first sub-assembly A (fig. 1) is formed by the connection bars 94 of the fixed contacts 80, the differential transformer 32 associated with the primary conductors 96 and the connection terminals 98.
  • the second sub-assembly B (fig . 1 and 5) comprises the switching bar 60 fitted with bridges 68 connected to the terminals 88 by the flexible braids 86.
  • the two sub-assemblies A and B are respectively positioned on the lower and upper faces of the wall 20 of the block 16 after insertion of the sliding terminals 98, 88 in the appropriate housings 100, 92.
  • the breaking chamber 24 is then covered by the cover 56 provided with a light 106 for the passage of the transmission finger 62 during the mounting of the mechanism 26 and the relay 28.
  • the intermediate block 16 fully wired is then positioned by the underside of the wall 22 in guide grooves 108 of the base 14; the cover 18 covers the bodies of the upper compartment 22 by resting on the upper face of the wall 22 after fitting the lever 42 and the test button 46.
  • the final assembly of the housing 12 of the switch 10 takes place at by means of two fixing screws passing through aligned holes in the base 14, the intermediate block 16 and the cover 16.
  • the assembly of the block 16 on the base 14 is effected by means of two hollow rivets taking the place of fastening elements of the switch 10 when the latter is mounted on a panel.
  • the differential switch is equipped with a position indicator 110 of the contacts capable of occupying two distinct positions depending on the position of the switching torch 54, a first position resetting the control mechanism 26 (fig. 9a) corresponding to the closing of the contacts 78, 80 of the poles of the switch, and a second position for signaling the opening of the contacts 78, 80 (fig. 9b).
  • Position indicator 110 comprises a bent lever 112, articulated on a pivot 114 secured to the upper plate 116 of the mechanism 26 located opposite the cover 18.
  • One of the ends of the pivoting signaling lever 112 comprises a hole 118 oblong in which the finger engages transmission 62 of the control mechanism 26.
  • a reference mark 0 for signaling.
  • the upper 116 and lower 56 plates of the mechanism 26 are each provided with a notch 120 revealing a fixed mark I secured to the cover 58 of the intermediate block 16.
  • the mark I is located opposite a window 122 formed in the cover 18 made of opaque insulating material.
  • the opening of the contacts by manual action or on differential actuation causes the translation of the transmission finger 62 in the lumen 66 and the pivoting of the signaling lever 112 anticlockwise to the second active signaling position opening the switch.
  • the reference I is hidden by the reference 0, and the latter is visible through the window 122. The user is then certain that the contacts 78, f0 of the poles are open.
  • Figures 10 to 12 show the embodiment of a bipolar switch 130 from the four-pole version described above.
  • the same references designate parts that are identical or similar to those of FIGS. 1 to 9.
  • the standard four-pole switch 10 is used after removing two strips 94 for connecting fixed contacts 80, and two movable contacts 68 with the associated braids 86.
  • the corresponding terminals 88 and 98 are replaced by shutters 132.
  • a device for locking the actuating members (fig. 12 and 13), in particular of the lever 42 and of the test button 46, comprises a seal 134 which can be sealed, formed by a precut polycarbonate plate arranged on the cover 18. The lever 42 may thus be locked in the two engaged and released positions.
  • the four-pole 10 and two-pole switches 130 can be equipped with a remote tripping device.
  • this remote triggering device for the bipolar switch 130 will be described (see FIGS. 11 and 12). It comprises a connector 136 integrated into the intermediate block 16 and cooperating with a plug-in socket 138 for remote triggering.
  • the electrical connection of connector 136 is made by two connecting wires, one of which 140 is connected to one phase and the other of which 142 is connected to the other phase by means of a tertiary winding 144 of the transformer differential 32.

Abstract

1. Multi-pole low-voltage differential switch with an insulated moulded housing (12) comprising : - a differential current detector constituted by an annular core transformer (32) totalising the currents of the a. c. network to be protected, - a relay (28) operated by said detector to free the interlock of a control mechanism (26) on appearance of a differential fault current, - a switch shaft (60) in form of a oblong runner operated by said control mechanism (26) and supporting staggered along the shaft (60) contact arms (68) of the movable contacts (78) of the different poles extending transversely to said shaft, this shaft being mounted with longitudinal sliding motion in order to move said movable contacts (78) selectively in the open position and in the closed position in contact with the coupled stationary contacts (80), characterized by the fact that each contact arm (68) is mounted elastically on the shaft (60) in order to execute a limited relative pivoting and translation movement, said arm (68) extending on both sides of the shaft (60) and supporting on one of its ends the movable contact (78) which can cooperate with the coupled stationary contact (80), the opposite end of the arm being connected by a strip (86) with terminals (88) of the apparatus and being capable to move unrestrainedly, a stop (104) limiting indirectionnally the movement of said opposite end into the closing direction of the contacts.

Description

L'invention concerne un interrupteur différentiel multipolaire basse tension à boîtier isolant moulé renfermant :

  • - un détecteur de courant différentiel formé par un transformateur torique de sommation des courants du réseau alternatif à protéger,
  • - un relais piloté par ledit détecteur pour libérer lors de l'apparition d'un courant de défaut différentiel, la serrure d'un mécanisme de commande,
  • - un barreau de commutation en forme de coulisseau allongé actionné par ledit mécanisme de commande et portant échelonnés le long du barreau des bras de support des contacts mobiles des différents pôles s'étendant transversalement audit barreau ce dernier étant monté à coulissement longitudinal pour déplacer lesdits contacts mobiles sélectivement en position d'ouverture et en position de fermeture au contact de contacts fixes conjugués.
The invention relates to a low-voltage multipole differential switch with molded insulating housing containing:
  • - a differential current detector formed by a toroidal transformer for summing the currents of the AC network to be protected,
  • - a relay controlled by said detector to release, when a differential fault current appears, the lock of a control mechanism,
  • - a switching rod in the form of an elongated slide actuated by said control mechanism and bearing staggered along the bar of the support arms of the movable contacts of the various poles extending transversely to said bar, the latter being mounted in longitudinal sliding to move said contacts selectively movable in the open position and in the closed position in contact with conjugate fixed contacts.

Un interrupteur connu du genre mentionné (brevet français N° 2.282.715) comporte un barreau portant des ponts de contacts, dont chacun coopère avec deux contacts fixes pour créer une double coupure par pôle. La présente invention est basée sur la constatation que les contacts constituent des points critiques des interrupteurs dont l'évolution est mal maîtrisée et dont la résistance de contact est une cause d'échauffement par effet Joule de l'appareil. L'incidence des contacts sur le coût de l'appareil n'est pas négligeable surtout lorsque les contacts comportent des pastilles à base d'argent.A known switch of the kind mentioned (French Patent No. 2,282,715) comprises a bar carrying contact bridges, each of which cooperates with two fixed contacts to create a double break per pole. The present invention is based on the observation that the contacts constitute critical points of the switches whose evolution is poorly controlled and whose contact resistance is a cause of heating by the Joule effect of the device. The impact of the contacts on the cost of the device is not negligible, especially when the contacts include silver-based pads.

L'invention a pour but d'éviter les inconvénients précités et de permettre la réalisation d'un interrupteur différentiel économique à performances améliorées.The invention aims to avoid the aforementioned drawbacks and to allow the production of an economical differential switch with improved performance.

L'interrupteur différentiel selon l'invention est caractérisé par le fait que chaque bras de contact est monté élastiquement semi-fixe sur le barreau pour pouvoir effectuer un mouvement relatif limité de pivotement et de translation ledit bras s'étendant de part et d'autre du barreau et portant à l'une de ses extrémités le contact mobile susceptible de coopérer avec le contact fixe conjugué, l'extrémité opposée du bras étant reliée par une tresse à une borne de l'appareil et étant susceptible de se déplacer librement, une butée limitant unidirectionnellement le déplacement de ladite extrémité opposée en direction de fermeture des contacts.The differential switch according to the invention is characterized in that each contact arm is elastically semi-fixed mounted on the bar to be able to perform a limited relative movement of pivoting and translation said arm extending on either side of the bar and carrying at one of its ends the movable contact capable of cooperating with the fixed fixed contact, the opposite end of the arm being connected by a braid to a terminal of the device and being capable of moving freely, a stop unidirectionally limiting the movement of said opposite end in the closing direction of the contacts.

Les avantages d'une telle disposition sont à la fois d'ordre économique par utilisation de deux contacts d'argent par pôle au lieu de quatre, et d'ordre technique par réduction des chutes de tension et de l'aptitude au collage des contacts sur court-circuit. Lors d'un collage le bras de contact fait office de levier imposant un pivotement relatif des contacts favorable à un arrachement.The advantages of such an arrangement are both economic by using two silver contacts per pole instead of four, and technical by reducing voltage drops and the bonding ability of the contacts on short circuit. When bonding the contact arm acts as a lever imposing a relative pivoting of the contacts favorable to tearing.

On connaît bien entendu des contacts à simple coupure ayant des bras de contact montés à pivotement sur un axe ou sur des surfaces d'appui (demande de brevet allemand 2.706.647), mais ces dispositifs connus imposent une trajectoire prédéterminée de déplacement du contact mobile et sont incapables de rompre un collage accidentel des contacts par un micro- déplacement relatif.Of course, single-cut contacts are known having contact arms pivotally mounted on an axis or on bearing surfaces (German patent application 2,706,647), but these known devices impose a predetermined path of movement of the movable contact. and are unable to break an accidental bonding of the contacts by a relative micro-displacement.

Selon un développement de l'invention, la butée coopérant avec le bras de contact est en faible saillie de façon que le bras de contact vienne en fin de mouvement de translation en butée et par la suite pivote pour fermer les contacts. Cette disposition garantit une pression de contact dès la fermeture des contacts évitant toute étincelle.According to a development of the invention, the stop cooperating with the contact arm is in slight projection so that the contact arm comes at the end of the translational movement in abutment and subsequently pivots to close the contacts. This arrangement guarantees contact pressure as soon as the contacts are closed, avoiding any sparks.

Selon un mode de réalisation de l'invention, le boîtier isolant de forme parallélépipédique est formé par la superposition d'un socle, d'un bloc intermédiaire de support et d'un capot d'obturation. Le bloc intermédiaire subdivise l'intérieur du boitier en deux compartiments superposés dont l'un supérieur contient un premier sous-ensemble électrique composé par les contacts, le relais et le mécanisme déclencheur et les contacts, etndont l'autre inférieur contient un deuxième sous-ensemble électrique, composé par le transformateur différentiel traversé par des conducteurs de connexion des contacts fixes aux bornes de sortie. Lesdits premier et deuxième sous-ensembles sont prémontés à l'extérieur du boîtier pour regrouper les organes électriques des différents pôles, puis positionnés et solidarisés respectivement sur les faces opposées du bloc intermédiaire.According to one embodiment of the invention, the insulating box of parallelepiped shape is formed by the superposition of a base, an intermediate support block and a shutter cover. The intermediate block subdivides the interior of the case into two superimposed compartments, the upper one of which contains a first electrical sub-assembly sheet composed by the contacts, the relay and the trip mechanism and the contacts, and the other lower contains a second electrical sub-assembly, composed by the differential transformer crossed by conductors connecting the fixed contacts to the output terminals. Said first and second sub-assemblies are pre-assembled outside the housing to group the electrical members of the different poles, then positioned and secured respectively on the opposite faces of the intermediate block.

Selon une autre caractéristique de l'invention, ledit bloc intermédiaire comporte des logements de bornes de raccordement échelonnés le long des deux bords du bloc parallèles au coulisseau. Lors du montage, les bornes solidaires du premier sous-ensemble, sont insérées par le haut dans une série de logements, tandis que les bornes solidaires du deuxième sous-ensemble sont insérées par le bas dans les logements opposés.According to another characteristic of the invention, said intermediate block comprises housings of connection terminals staggered along the two edges of the block parallel to the slide. During assembly, the integral terminals of the first sub-assembly are inserted from above into a series of housings, while the integral terminals of the second sub-assembly are inserted from below into the opposite housings.

Selon un développement de l'invention, le mécanisme déclencheur est équipé d'un indicateur de position des contacts actionné directement par le coulisseau.According to a development of the invention, the trigger mechanism is equipped with a contact position indicator actuated directly by the slide.

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

  • la figure 1 est une vue éclatée en perspective de l'interrupteur différentiel selon l'invention;
  • la figure 2 montre une vue en plan du bloc intermédiaire de support, le couvercle de fermeture de la chambre de commutation étant supposé enlevé;
  • la figure 3 représente une vue de dessous du bloc intermédiaire de support en position montée du transformateur différentiel;
  • la figure 4 est une vue analogue à celle de la figure 2, en position démontée du barreau de commutation;
  • la figure 5 montre une vue en élévation du sous-ensemble 8 équipé du barreau de commutation selon l'invention;
  • la figure 6 est une vue de profil du barreau de commutation;
  • les figures 7a, 7b, 7c, sont des vues schématiques par- tielles au niveau d'un pôle de la course en translation du barreau de commutation selon l'invention, respectivement en positions d'ouverture, intermédiaire et de fermeture des contacts. la positive intermediaire étant exagerée:
  • la figure 8 est une vue en coupe selon la ligne VIII-VIII de la fig. 2;
  • les figures 9a et 9b représentent des vues schématiques en plan du mécanisme de commande équipé d'un indicateur de déclenchement différentiel, respectivement en positions effacée de réarmement du mécanisme et active de signalisation du défaut;
  • les figures 10 et 11 sont des vues analogues à celles des figures 2 et 3, et représentent le bloc intermédiaire d'un interrupteur bipolaire;
  • la figure 12 est une vue de profil de l'interrupteur bipolaire équipé d'un dispositif de déclenchement à distance;
  • la figure 13 représente une vue en plan d'un interrupteur bipolaire équipé d'un dispositif de verrouillage plombable des organes de manoeuvre.
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 an exploded perspective view of the differential switch according to the invention;
  • FIG. 2 shows a plan view of the intermediate support block, the closure cover of the switching chamber being assumed to be removed;
  • FIG. 3 represents a bottom view of the intermediate support block in the mounted position of the differential transformer;
  • Figure 4 is a view similar to that of Figure 2, in the disassembled position of the switching rod;
  • Figure 5 shows an elevational view of the sub-assembly 8 equipped with the switching bar according to the invention;
  • Figure 6 is a side view of the switching bar;
  • Figures 7a, 7b, 7c are schematic views par- t ielles at one pole of the translational travel of the switching bar according to the invention, respectively in the open positions, intermediate and closing the contacts. the positive intermediate being exaggerated:
  • Figure 8 is a sectional view along line VIII-VIII of FIG. 2;
  • Figures 9a and 9b show schematic plan views of the control mechanism equipped with a differential trip indicator respectively at positions deleted e reset mechanism and active fault signaling;
  • Figures 10 and 11 are views similar to those of Figures 2 and 3, and show the intermediate block of a bipolar switch;
  • Figure 12 is a side view of the bipolar switch equipped with a remote release device;
  • FIG. 13 represents a plan view of a bipolar switch equipped with a sealable locking device for the operating members.

Sur les figures, un interrupteur différentiel 10 à basse tension est logé dans un bottier 12 en matériau isolant moulé formé par la superposition d'un socle 14, d'un bloc intermédiaire 16 de support des organes électriques et mé- caniques, et d'un capot 18 d'obturation du bottier 12. L'invention est décrite en référence à un interrupteur différentiel 10 tétrapolaire connecté dans un réseau triphasé avec conducteur neutre (fig. 1 à 9), mais il est évident qu'elle s'applique également à un interrupteur différentiel bipolaire utilisé dana un réseau monophasé avec neutre (fig. 10 à 12).In the figures, a low-voltage differential switch 10 is housed in a case 12 of molded insulating material formed by the superposition of a base 14, of a block Intermediate 16 supporting electric components and E- m-mechanical, and a cover 18 closing of the casing 12. The invention is described with reference to a differential switch 10 connected in a four-pole three-phase system with neutral conductor (fig. 1 to 9), but it is obvious that it also applies to a bipolar differential switch used in a single-phase network with neutral (fig. 10 to 12).

Sur les figures 1 à 9, le bloc isolant intermédiaire 16 comprend une paroi 20 transversale, a'étendant parallèlement à la base du socle 14, et divisant l'intérieur du boîtier 10 en deux compartiments, l'un 22 supérieur dirigé vers le capot 18 pour le logement d'une chambre de coupure 24, d'un mécanisme de commande 26 à resaort d'ouverture et d'un relais 28 polarisé, l'autre 30 inférieur, ménagé entre la paroi 20 et le socle 14 pour l'agencement d'un transformateur différentiel 32 torique de sommation des courants parcourant les conducteurs de l'interrupteur 10. L'organe de détection du dispositif de déclenchement différentiel est constitué par le transformateur 32 torique dont l'enroulement de mesure 34 est branché par des conducteurs de liaison 36 à la bobine de commande du relais 28. La palette 36 mobile de ce dernier coopère avec un levier de verrouillage 40 d'une serrure du mécanisme de commande 26 juxtaposé à manette 42 rotative de réarmement déplaçable entre deux positions extrêmes de fermeture et d'ouverture. Un tel dispositif de déclenchement différentiel est usuel et son fonctionnement peut être résumé en signalant qu'une excitation du relais 26 par le transformateur 32 intervient lors d'une apparition d'un courant différentiel dans les conducteurs de traversée du tere de détection, et provoque le pivotement du levier de verrouillage 40 dans le sens des aiguilles d'une montre (figure 9b) antraînant la libération de le serrure du mécanisme 26 suivie du déclenchement automatique de l'interrupteur dont les contacts s'ouvrent sous l'action du ressort d'ouverture. Le réarmement de la serrure s'opère par pivotement de la manette 42 du mé- canisme 26 vers la position de fermeture (fig. 9a) des contacts.In FIGS. 1 to 9, the intermediate insulating block 16 comprises a transverse wall 20, extending parallel to the base of the base 14, and dividing the interior of the housing 10 into two compartments, the upper 22 directed towards the cover 18 for housing a switching chamber 24, a control mechanism 26 with an opening resaort and a polarized relay 28, the other lower 30, formed between the wall 20 and the base 14 for the arrangement of a toroidal differential transformer 32 for summing the currents flowing through the conductors of the switch 10. The detection member of the differential tripping device consists of the toroidal transformer 32 whose measurement winding 34 is connected by conductors 36 to the control coil of the relay 28. The movable pallet 36 of the latter cooperates with a locking lever 40 of a lock of the control mechanism 26 juxtaposed with a rotary handle 42 resettable movable between two extreme positions closing and opening. Such a differential tripping device is usual and its operation can be summarized by signaling that an excitation of the relay 26 by the transformer 32 occurs during the appearance of a differential current in the conductors crossing the detection terminal, and causes pivoting of the locking lever 40 clockwise (Figure 9b) causing the release of the mechanism 26 lock followed by the automatic release of the switch whose contacts open under the action of the spring d 'opening. Rearmament of the lock is effected by pivoting the lever 42 of the m e - mechanism 26 to the closed position (fig 9a.) of the contacts.

Un dispositif de contrôle et d'essai du fonctionnement de la protection différentielle par le transformateur 32 est réalisé d'une manière classique par un circuit dérivé comprenant en série une résistance d'essai 44 et un interrupteur d'es- sal (non représenté) à bouton test 46. Un enfoncement du bouton test 46 à l'encontre de son ressort de rappel entraîne la fermeture de l'interrupteur d'essai engendrant un courant différentiel artificiel détecté par le transformateur 32, qui provoque l'ouverture de l'interrupteur 10. La résistance d'essai 44 est logée dans le compartiment inférieur 30 à l'intérieur d'une encoche 48 ménagée dans le bloc intermédiaire 16 (fig. 3). Le bouton test 46 fait saillie au capot 18 à travers une fenêtre carrée située à proximité d'un trou 50 circulaire pour l'introduction de la manette 42 de commande. Cette dernière comporte un tenon de manoeuvre 52 engagé dans un orifice 54 du mécanisme 26 (fig. 1).A device for controlling and testing the operation of the differential protection by the transformer 32 is produced in a conventional manner by a branch circuit comprising in series a test resistor 44 and a salt switch (not shown) with test button 46. Pressing the test button 46 against its return spring causes the test switch to close, generating an artificial differential current detected by the transformer 32, which causes the switch to open. 10. The test resistor 44 is housed in the lower compartment 30 inside a notch 48 formed in the intermediate block 16 (FIG. 3). The test button 46 protrudes from the cover 18 through a square window located near a circular hole 50 for the introduction of the control handle 42. The latter comprises an operating pin 52 engaged in an orifice 54 of the mechanism 26 (fig. 1).

Le relais 28 de déclenchement différentiel et le mécanisme de commande 26 associé sont egencés dans le compartiment supérieur 24 sur une platine 56 fixe commune disposée sur un couvercle 58 isolant d'obturation de la chambre de coupure 24. Un barreau 60 de commutation en forme de coulisseau isolant est monté à translation limitée dans la chambre 24 durant une course prédéterminée entre deux positions extrêmes de fermeture et d'ouverture de l'interrupteur. Le déplacement en translation du barreau 60 est opéré par l'interné- diaire d'un doigt de transmission 62 du mécanisme 26 cospé- rant par emboîtement avec un orifice d' actionnement 64 du barreau 60. Le doigt de transmission 62 est guide durant la- dîte course dans une lumière 66 oblongue du mécanisme 26, s'étendant dans la direction longitudinale du barreau 60 coulissant.The differential trigger relay 28 and the associated control mechanism 26 are arranged in the upper compartment 24 on a common fixed plate 56 disposed on a cover 58 insulating shutter of the breaking chamber 24. A switching bar 60 in the form of insulating slide is mounted in limited translation in the chamber 24 during a predetermined stroke between two extreme positions of closing and opening of the switch. The displacement in translation of the bar 60 is effected by the intermediary of a transmission finger 62 of the mechanism 26 co-operating by interlocking with an actuating orifice 64 of the bar 60. The transmission finger 62 is guided during the - said stroke in an oblong slot 66 of the mechanism 26, extending in the longitudinal direction of the sliding bar 60.

Le barreau 60 de commutation est équipé de quatre ponts de contacts 68 de structures identiques, échelonnés à inter- valles réguliers le long de la direction longitudinale dans des logements 70 rectangulaires à l'axe du barreau 60.The switching bar 60 is equipped with four bridges of Contacts 68 of identical structures, spread to inter- v a ll are regular along the longitudinal direction in the housing 70 rectangular to the axis of rod 60.

Le pont de contact 68 reotiligne de chaque pôle a'étend perpendiculairement au barreau 60 et traverse le logement 70 correspondant en étant maintenu en place par un ressort 72 de pression de contact, intercalé entre la partie médiane du pont 68 et le fond du logement 70. La chambre de coupure 24 est subdivisée par des cloisons 74 interoa- laires (fig. 4) en quatre espaces 76 juxtaposés échelonnés le long du barreau 60 et servant de logement aux ponts de contact 68 des différents pôles. Chaque cloison 74 perpendiculaire à la paroi 20 vient de moulage avec le bloc 16 et comporte une rainure centrale pour le logement du barreau 60 coulissant. L'une des extrémités de chaque pont 68 porte une pastille de contact constituant le contact mobile 78 venant en engagement en position de fermeture de l'interrupteur avec un contact fixe 80 assujetti à la cloison 74 correspondante. Lors de la translation du barreau 60 vers la position d'ouverture, l'intervalle de coupure 82 ménagé entre les contacts séparés 80, 78 de chaque pôle, s'étend dans la direction longitudinale le long d'un même côté du barreau 60 à l'intérieur du logement 70 correspondant. A l'opposé de l'intervalle de coupure 82 par rapport à l'axe du barreau 60 se trouve l'autre extrémité du pont 68 reliée électriquement par une tresse souple de liaison 86 à une plage 87 conductrice d'une borne de raccordement 88 du pôle correspondent.The contact bridge 68 reotilinear of each pole extends perpendicular to the bar 60 and passes through the corresponding housing 70 while being held in place by a contact pressure spring 72, interposed between the middle part of the bridge 68 and the bottom of the housing 70 The interrupting chamber 24 is subdivided by intermediate partitions 74 (FIG. 4) into four juxtaposed spaces 76 staggered along the bar 60 and serving as housing for the contact bridges 68 of the different poles. Each partition 74 perpendicular to the wall 20 is molded with the block 16 and has a central groove for housing the sliding bar 60. One end of each bridge 68 carries a contact pad constituting the movable contact 78 coming into engagement in the closed position of the switch with a fixed contact 80 secured to the corresponding partition 74. During the translation of the bar 60 towards the open position, the cut-off interval 82 formed between the separate contacts 80, 78 of each pole, extends in the longitudinal direction along the same side of the bar 60 to the interior of the corresponding housing 70. Opposite the cut-off interval 82 with respect to the axis of the bar 60 is the other end of the bridge 68 electrically connected by a flexible connecting braid 86 to a pad 87 conducting a connection terminal 88 of the corresponding pole.

La plage 87 de chaque borne 88 est recourbée en U, et montée prisonnière dans une cage conductrice munie d'une vis de fixation 90 prenant appui sur la base de la plage 87 qui sert en même temps de plaquette de serrage au conducteur électrique maintenu dans la fenêtre de la borne 88. Chaque borne de raccordement 88 reste solidaire du pont de contact 68 correspondant, et est enfilée par coulissement dans un logement 92 ménagé dans la paroi 20 du bloc intermédiaire.16.The area 87 of each terminal 88 is bent in a U, and mounted captive in a conductive cage provided with a fixing screw 90 resting on the base of the area 87 which simultaneously serves as a clamping plate for the electrical conductor held in the window of the terminal 88. Each connection terminal 88 remains integral with the corresponding contact bridge 68, and is threaded by sliding into a housing 92 formed in the wall 20 of the intermediate block. 16.

Chaque contact fixe 80 est porté par une barrette de con- nexion 94 qui traverse la paroi 20 et s'étend ensuite trans- versalement dans le compartiment inférieur 30. Le tore du transformateur 32 différentiel est traversé par des conduc- teurs primaires 96 branchés respectivement par leurs extrémités opposées aux barrettes 94 et à des plages 97 de bornes de raccordement 98 des différents pôles. Chaque borne 98 du type à cage est insérée dans un logement 100 du bloc intermédiaire 16, et la plage 97 correspondante est conformée en double équerre, dont la branche médiane est agencée dans la cage et sert de plaquette de serrage.Each fixed contact 80 is carried by a strip of not con- ction 94 which passes through the wall 20 and then extends trans- ve rsalement in the lower compartment 30. The differential transformer the toroid 32 is traversed by primary conductive tors 96 connected respectively by their opposite ends to the bars 94 and to areas 97 of connection terminals 98 of the different poles. Each terminal 98 of the cage type is inserted into a housing 100 of the intermediate block 16, and the corresponding pad 97 is shaped as a double square, the middle branch of which is arranged in the cage and serves as a clamping plate.

Les logements 92, 100 des bornes 88, 98 d'amenée de courant s'étendent le long de deux côtés opposés du bloc intermédiaire 16 de part et d'autre du barreau de commutation 60. Les bornes 88, 98 d'un même pôle sont alignées selon une direction perpendiculaire au barreau 60 et parallèle au pont de contact 68 correspondant. Le capot 18 du boîtier 12 est doté d'orifices 102 d'accès aux vis de fixation des bornes 88, 98.The housings 92, 100 of the current supply terminals 88, 98 extend along two opposite sides of the intermediate block 16 on either side of the switching rod 60. The terminals 88, 98 of the same pole are aligned in a direction perpendicular to the bar 60 and parallel to the corresponding contact bridge 68. The cover 18 of the housing 12 is provided with holes 102 for access to the terminal fixing screws 88, 98.

Les figurer 7a, 7b et 7c montrent schématiquement le fonctionnement du barreau de commutation 60 au cours de sa course de translation au niveau d'un pôle de l'interrupteur. Le pont de contact 68 est monté élastiquement dans le logement 70 du coulisseau en position d'ouverture des contacts 78, 80 (fig. 7a). Au cours de la course de fermeture du coulisseau actionné dans le sens de la flèche F par le mécanisme de commande 26, le talon du pont 68 à l'opposé du contact 78 vient buter dans une position intermédiaire contre un épaulement 104 fixe de la paroi 74 du bloc isolant 16 avant la fermeture des contacts 76, 80 (fig. 7b). La course de fermeture poursuivie du barreau de consutation 60provoque ensuite la fermeture des contacts (fig. 7c) et une pression de contact correcte par compression du ressort 72 associé au pont 68. Un mouvement inverse d'ouverture provoque, lors d'un collage des contacts, un arrachement par pivotement, le pont 68 constituant un levier multiplicateur d'effort.Figures 7a, 7b and 7c schematically show the operation of the switching bar 60 during its translational travel at a pole of the switch. The contact bridge 68 is resiliently mounted in the housing 70 of the slide in the open position of the contacts 78, 80 (fig. 7a). During the closing stroke of the slide actuated in the direction of arrow F by the control mechanism 26, the heel of the bridge 68 opposite the contact 78 abuts in an intermediate position against a fixed shoulder 104 of the wall 74 of the insulating block 16 before the contacts 76, 80 are closed (fig. 7b). The continued closing stroke of the consutation bar 60 then causes the contacts to close (fig. 7c) and a correct contact pressure by compression of the spring 72 associated with the bridge 68. A reverse opening movement causes, during bonding of the contacts, a breakout by pivoting, the bridge 68 constituting a force multiplier lever.

Le bloc intermédiaire 16 sert de support à deux sous-ensembles A et B prémontés regroupant les organes électriques des différents pôles. Le premier sous-ensseble A (fig. 1) est formé par les barrettes de connexion 94 des contacts fixes 80, le transformateur différentiel 32 associé aux oonduc- teurs primaires 96 et les bornes de raccordement 98. Le deuxième sous-ensemble B (fig. 1 et 5) comporte le barreau de commutation 60 équipé des ponts 68 raccordés aux bornes 88 par les tresses souples 86. Les deux sous-ensembles A et B sont respectivement positionnés sur les faces inférieure et supérieure de la paroi 20 du bloc 16 après insertion des bornes coulissantes 98, 88 dans les logements appropriés 100, 92. La chambre de coupure 24 est ensuite recouverte par le couvercle 56 pourvu d'une lumière 106 pour le passage du doigt de transmission 62 lors du montage du mécanisme 26 et du relais 28. Le bloc intermédiaire 16 entièrement câblé est ensuite positionné par la face inférieure de le paroi 22 dans des rainures de guidage 108 du socle 14; le capot 18 coiffe les organes du compartiment supérieur 22 en reposant sur la face supérieure de la paroi 22 après mise en place de la manette 42 et du bouton test 46. L'assemblage définitif du boîtier 12 de l'interrupteur 10 s'opère au moyen de deux vis de fixation traversant des trous alignés du socle 14, du bloc intermédiaire 16 et du capot 16.The intermediate block 16 serves as a support for two pre-assembled sub-assemblies A and B grouping together the electrical members of the different poles. The first sub-assembly A (fig. 1) is formed by the connection bars 94 of the fixed contacts 80, the differential transformer 32 associated with the primary conductors 96 and the connection terminals 98. The second sub-assembly B (fig . 1 and 5) comprises the switching bar 60 fitted with bridges 68 connected to the terminals 88 by the flexible braids 86. The two sub-assemblies A and B are respectively positioned on the lower and upper faces of the wall 20 of the block 16 after insertion of the sliding terminals 98, 88 in the appropriate housings 100, 92. The breaking chamber 24 is then covered by the cover 56 provided with a light 106 for the passage of the transmission finger 62 during the mounting of the mechanism 26 and the relay 28. The intermediate block 16 fully wired is then positioned by the underside of the wall 22 in guide grooves 108 of the base 14; the cover 18 covers the bodies of the upper compartment 22 by resting on the upper face of the wall 22 after fitting the lever 42 and the test button 46. The final assembly of the housing 12 of the switch 10 takes place at by means of two fixing screws passing through aligned holes in the base 14, the intermediate block 16 and the cover 16.

L'assemblage du bloc 16 sur le socle 14 s'opère au moyen de deux rivets creux tenant lieu d'éléments de fixation de l'interrupteur 10 lorsque celui-ci est monté sur panneau.The assembly of the block 16 on the base 14 is effected by means of two hollow rivets taking the place of fastening elements of the switch 10 when the latter is mounted on a panel.

Selon un développement de l'invention, illustré aux fleures 9 a et 9b, l'interrupteur différentiel est équipé d'un indicateur de position 110 des contacts susceptible d'occuper deux positions distinctes selon la position du burreau de commutation 54, une première position de réarmement du mécanisme de commande 26 (fig. 9a) correspondant à la fermeture des contacts 78, 80 des pôles de l'interrupteur, et une deuxième position de signalisation de l'ouverture des contacts 78, 80 (fig. 9b). L'indicateur de position 110 comporte un levier 112 coudé, articulé sur un pivot 114 assujetti à la platine 116 supérieure du mécanisme 26 située en regard du capot 18. L'une des extrémités du levier pivotant de signalisation 112 comprend un trou 118 oblong dans lequel s'engage le doigt de transmission 62 du mécanisme de commande 26. A l'extrémité opposée du levier 112 est associé un repère 0 de signalisation. Les platines supérieure 116 et inférieure 56 du mécanisme 26 sont munies chacune d'une encoche 120 laissant apparaître un repère I fixe solidaire du couvercle 58 du bloc intermédiaire 16. Le repère I est situé en regard d'une fenêtre 122 ménagée dans le capot 18 en matériau isolant opaque.According to a development of the invention, illustrated in flowers 9a and 9b, the differential switch is equipped with a position indicator 110 of the contacts capable of occupying two distinct positions depending on the position of the switching torch 54, a first position resetting the control mechanism 26 (fig. 9a) corresponding to the closing of the contacts 78, 80 of the poles of the switch, and a second position for signaling the opening of the contacts 78, 80 (fig. 9b). Position indicator 110 comprises a bent lever 112, articulated on a pivot 114 secured to the upper plate 116 of the mechanism 26 located opposite the cover 18. One of the ends of the pivoting signaling lever 112 comprises a hole 118 oblong in which the finger engages transmission 62 of the control mechanism 26. At the opposite end of the lever 112 is associated a reference mark 0 for signaling. The upper 116 and lower 56 plates of the mechanism 26 are each provided with a notch 120 revealing a fixed mark I secured to the cover 58 of the intermediate block 16. The mark I is located opposite a window 122 formed in the cover 18 made of opaque insulating material.

Le fonctionnement de l'indicateur de position 110 est le suivant :

  • En position armée du mécanisme 26 et de fermeture des contacts 78, 801(fig. 9a) de l'interrupteur, le levier de signalisation 112 se trouve dans la première position effacée autorisant la visualisation du repère 1 à travers la fenêtre 122 du capet 16.
The operation of the position indicator 110 is as follows:
  • In the armed position of the mechanism 26 and of the closing of the contacts 78, 801 (fig. 9a) of the switch, the signaling lever 112 is in the first erased position allowing the display of the mark 1 through the window 122 of the capet 16 .

L'ouverture des contacts par action manuelle ou sur déclenchement différentiel entraîne la translation du doigt de transmission 62 dans la lumière 66 et le pivotement du levier de signalisation 112 dans le sens inverse des aiguilles d'une montre jusque dans la deuxième position active de signalisation de l'ouverture de l'interrupteur. Le repère I est caché par le repère 0, et ce dernier est visible à travers la fenêtre 122. L'utilisateur est alors certain que les contacts 78, f0 des pôles sont ouverts.The opening of the contacts by manual action or on differential actuation causes the translation of the transmission finger 62 in the lumen 66 and the pivoting of the signaling lever 112 anticlockwise to the second active signaling position opening the switch. The reference I is hidden by the reference 0, and the latter is visible through the window 122. The user is then certain that the contacts 78, f0 of the poles are open.

Les trois opérations de réarmement du aéoanisee tt, de fareeture des contacts de l'interrupteur 10 et de remise de l'indicateur de position 110 en position de repos sont effectuésspar un simple actionnemement de la manette 42 pivotante vers la position abaisée de fermeture (fig. 9a).The three operations of resetting the aéoanisee tt, the fareeture of the contacts of the switch 10 and the return of the position indicator 110 to the rest position are carried out by a simple actuation of the lever 42 pivoting towards the lowered closing position (fig . 9a).

Les figures 10 à 12 représentent la réalisation d'un interrupteur bipolaire 130 à partir de la version tétrapolaire décrite précédemment. Les mêmes repères désignent des pièces identiques ou similaires à celles des figures 1 à 9. On emploie avantageusement l'interrupteur tétrapolaire 10 standard après avoir supprlmé deux barrettes 94 de connexion de contacts fixes 80, et deux contacts mobiles 68 avec les tresses associées 86. Les bornes 88 et 98 correspondantes sont resplacées par des obturateurs 132.Figures 10 to 12 show the embodiment of a bipolar switch 130 from the four-pole version described above. The same references designate parts that are identical or similar to those of FIGS. 1 to 9. Advantageously, the standard four-pole switch 10 is used after removing two strips 94 for connecting fixed contacts 80, and two movable contacts 68 with the associated braids 86. The corresponding terminals 88 and 98 are replaced by shutters 132.

Un dispositif de verrouillage des organes de manoeuvre (fig. 12 et 13), notamment de la manette 42 et du bouton test 46, comprend un verrou 134 plombable, formé par une plaque prédécoupée en polycarbonate agencée sur le capot 18. La manette 42 pourra être ainsi verrouillée dans les deux positions enclenchée et déclenchée.A device for locking the actuating members (fig. 12 and 13), in particular of the lever 42 and of the test button 46, comprises a seal 134 which can be sealed, formed by a precut polycarbonate plate arranged on the cover 18. The lever 42 may thus be locked in the two engaged and released positions.

Selon un autre développement de l'invention, les interrupteurs tétrapolaires 10 et bipolaires 130 peuvent être équipés d'un dispositif de déclenchement à distance. A titre d'exemple, on décrira ce dispositif de déclenchement à distance pour l'interrupteur bipolaire 130 (voir figures 11 et 12). Il comporte un connecteur 136 intégré au bloc intermédiaire 16 et coopérant avec une prise 138 enfichable pour le déclenchement à distance. Le raccordement électrique du connecteur 136 s'effectue par deux fils de liaison, dont l'un 140 est relié à une phase et dont l'autre 142 est relié à l'autre phase par l'intermédiaire d'un enroulement tertiaire 144 du transformateur différentiel 32.According to another development of the invention, the four-pole 10 and two-pole switches 130 can be equipped with a remote tripping device. By way of example, this remote triggering device for the bipolar switch 130 will be described (see FIGS. 11 and 12). It comprises a connector 136 integrated into the intermediate block 16 and cooperating with a plug-in socket 138 for remote triggering. The electrical connection of connector 136 is made by two connecting wires, one of which 140 is connected to one phase and the other of which 142 is connected to the other phase by means of a tertiary winding 144 of the transformer differential 32.

Claims (9)

1. Interrupteur différentiel multipolaire basse tension à boîtier (12) isolant moulé renfermant : - un détecteur de courant différentiel formé par un transformateur (32) torique de sommation des courants du réseau alternatif à protéger, - un relais (28) piloté par ledit détecteur pour libérer lors de l'apparition d'un courant de défaut différentiel, la serrure d'un mécanisme (26) de commande, - un barreau de commutation (60) en forme de coulisseau allonge actionné par ledit mécanisme de commande (26) et portant échelonnés le long du barreau (60) des bras de support (65) des contacts mobiles (75) des différents pôles s'étendant transversalement audit barreau, ce dernier étant monté à coulissement longitudinal pour déplacer lesdits contacts mobiles (78) sélectivement en position d'ouverture et en position de fermeture au contact de contacts fixes (80) conjugués, caractérisé par le fait que chaque bras de contact (65) est monté élastiquement semi-fixe sur le barreau (60) pour pouvoir effectuer un mouvement relatif limité de pivotement et de translation, ledit bras (68) s'étendant de part et d'autre du barreau (60) et portant à l'une de ses extrémités le contact mobile (78) susceptible de coopérer avec le contact fixe conjugué (80), l'extrémité opposée du bras étant reliée par une tresse (86) à une borne (88) de l'appareil et étant susceptible de se déplacer librement, une butée (104) limitant unidirectionnellement le déplacement de ladite extrémité opposée en direction de fermeture des contacts. 1. Low voltage multipolar differential switch with molded insulating housing (12) containing: - a differential current detector formed by a toroidal transformer (32) for summing the currents of the alternating network to be protected, - a relay (28) controlled by said detector to release, when a differential fault current appears, the lock of a control mechanism (26), - A switching rod (60) in the form of an extension slide actuated by said control mechanism (26) and bearing staggered along the rod (60) of the support arms (65) of the movable contacts (75) of the different poles extending transversely to said bar, the latter being mounted with longitudinal sliding for displacing said movable contacts (78) selectively in the open position and in the closed position in contact with fixed fixed contacts (80), characterized in that each contact arm (65) is elastically semi-fixed mounted on the bar (60) to be able to perform a limited relative movement of pivoting and translation, said arm (68) extending on either side of the bar (60) and bringing to one of its ends the movable contact (78) capable of cooperating with the conjugate fixed contact (80), the opposite end of the arm being connected by a braid (86) to a terminal (88) of the device and being capable of moving freely, a stop e (104) unidirectionally limiting the movement of said opposite end in the direction of closing of the contacts. 2. Interrupteur selon la revendication 1, caractérisé en ce que ladite butée (104) est disposée en faible saillie du plan transversal contenant le contact fixe conjugué (80) en direction du bras de contact (68) de façon que le bras de contact vient en butée par ladite extrémité opposée avant la fermeture des contacts.2. Switch according to claim 1, characterized in that said stop (104) is arranged in slight projection from the transverse plane containing the fixed conjugate contact (80) in the direction of the contact arm (68) so that the contact arm comes abutted by said opposite end before the contacts are closed. 3. Interrupteur différentiel multipolaire selon la revendication 1 ou 2, ayant un boîtier (12) parallélépipédique en matériau isolant formé par la superposition d'un socle (14) d'un bloc intermédiaire (16) de support et d'un capot d'obturation (18), caractérisé par le fait que ledit bloc intermédiaire (16) sert de support à l'ensemble des organes électriques et au mécanisme de commande (26), et comporte une paroi transversale (20) s'étendant parallèlement à la base du socle (14) pour diviser l'intérieur du boîtier en deux compartiments (22, 30) superposés, dont l'un (22) supérieur contient le relais (28), le mécanisme (26) et un premier sous-ensemble B comportant les contacts (80, 78) et le coulisseau (60), et dont l'autre (30) inférieur contient un deuxième sous-ensemble A formé par le transformateur différentiel (32) traversé par des conducteurs (96) de connexion des contacts fixes (80) aux bornes de sortie (98).3. Multipolar differential switch according to claim 1 or 2, having a housing (12) parallelepiped in insulating material formed by the superposition of a base (14) of an intermediate block (16) for support and a cover of shutter (18), characterized in that said intermediate block (16) serves as a support for all the electrical members and the control mechanism (26), and comprises a transverse wall (20) extending parallel to the base the base (14) for dividing the interior of the housing into two superimposed compartments (22, 30), one of which (22) upper contains the relay (28), the mechanism (26) and a first sub-assembly B comprising the contacts (80, 78) and the slide (60), and the other (30) of which contains a second sub-assembly A formed by the differential transformer (32) crossed by conductors (96) for connection of the fixed contacts (80) to the output terminals (98). 4. Interrupteur différentiel multipolaire selon la revendication 3, caractérisé par le fait que ledit bloc intermédiaire (16) comporte des logements (92, 100) échelonnés le long des côtés latéraux opposés du bloc (16) dans la direction de déplacement du coulisseau (60) et de part et d'autre de ce dernier, et que lors de l'assemblage de l'interrupteur lesdites bornes de raccordement (88, 98) du type à cage sont insérées par coulissement vertical respectivement par le haut dans les logements (92) correspondants et par le bas dans les logements (100) opposés des différents pôles.4. Multipolar differential switch according to claim 3, characterized in that said intermediate block (16) comprises housings (92, 100) staggered along the opposite lateral sides of the block (16) in the direction of movement of the slide (60 ) and on either side of the latter, and that during assembly of the switch, said connection terminals (88, 98) of the cage type are inserted by vertical sliding respectively from above into the housings (92 ) corresponding and from below in the housings (100) opposite the different poles. 5. Interrupteur différentiel multipolaire selon la revendication 4, caractérisé par le fait que dans chaque pôle la tresse (86) souple de liaison et le conducteur de connexion (96) sont raccordés respectivement à des plages (87, 97) conductrices des bornes (88, 98) opposées, chaque plage (87, 97) étant montée prisonnière dans la cage de la borne (88, 98) correspondante et coopérant avec un organe de fixation pour jouer en même temps le rôle de plaquette de serrage des conducteurs de branchement dudit pôle de l'interrupteur. 6. Interrupteur différentiel multipolaire selon l'une des revendications 2 à 5, dans lequel ladite chambre de coupure (24) de logement du coulisseau (60) est subdivisée par des cloisons (74) intercalaires solidaires du bloc intermédiaire (16), en une pluralité d'espaces (76) juxtaposés échelonnés le long du coulisseau (60) et servant de logement aux bras de contact (68) des différents pôles, caractérisé par le fait que chaque cloison (74) intercalaire en matériau isolant vient de moulage avec le bloc intermédiaire (16) en s'étendant perpendiculairement à la paroi (20) dans le compartiment supérieur (22), et que chaque bras de contact (68) est monté élastiquement dans une fenêtre (70) axiale du cou-Jisseau (60), la butée (104) étant portée par la cloison (74).5. Multipolar differential switch according to claim 4, characterized in that in each pole the flexible braid (86) and the connection conductor (96) are respectively connected to pads (87, 97) conducting the terminals (88 , 98) opposite, each track (87, 97) being mounted captive in the cage of the corresponding terminal (88, 98) and cooperating with a fixing member to play at the same time the role of clamping plate of the connection conductors of said switch pole. 6. Multipolar differential switch according to one of claims 2 to 5, in which said cut-out chamber (24) for housing the slide (60) is subdivided by dividing partitions (74) integral with the intermediate block (16), in a plurality of juxtaposed spaces (76) staggered along the slide (60) and serving as housing for the contact arms (68) of the different poles, characterized in that each partition (74) inserted in insulating material is molded with the intermediate block (16) extending perpendicular to the wall (20) in the upper compartment (22), and that each contact arm (68) is resiliently mounted in an axial window (70) of the neck-Jisseau (60) , the stop (104) being carried by the partition (74). 7. Interrupteur différentiel multipolaire selon la revendication 6, caractérisé par le fait que chaque bras de contact (68) traverse perpendiculairement la fenêtre (70) correspondante du coulisseau (60) et qu'un ressort (72) de compression, intercalé entre la partie médiane dudit pont (68) et l'un des fonds de la fenêtre (70) est comprimé en position de fermeture du coulisseau (60) pour assurer une press ion de contact appropriée.7. Multipolar differential switch according to claim 6, characterized in that each contact arm (68) passes perpendicularly through the corresponding window (70) of the slide (60) and that a compression spring (72) interposed between the part median of said bridge (68) and one of the bottoms of the window (70) is compressed in the closed position of the slide (60) to ensure an appropriate contact pressure. 8. Interrupteur différentiel multipolaire selon l'une des revendications 1 à 7, caractérisé par le fait que le mécanisme déclencheur (26) est équipé d'un indicateur de position des contacts (110) susceptible d'occuper deux positions distinctes selon la position du barreau de commutation (60), une première position effacée de réarmement du mécanisme (26) correspondant à la fermeture des contacts (78, 80) des pôles, et une deuxième position active correspondant à l'ouverture des contacts.8. Multipole differential switch according to one of claims 1 to 7, characterized in that the trigger mechanism (26) is equipped with a contact position indicator (110) capable of occupying two distinct positions depending on the position of the switching bar (60), a first erased reset position of the mechanism (26) corresponding to the closing of the contacts (78, 80) of the poles, and a second active position corresponding to the opening of the contacts. 9. Interrupteur différentiel multipolaire selon la revendication 8, caractérisé par le fait que ledit indicateur de position (110) des contacts comporte un levier coudé (112) articulé sur un pivot (114) assujetti à la platine supérieure (116) du mécanisme (26) située en regard du capot (18), l'une des extrémités dudit levier (112) étant dotée d'un trou oblong (118) dans lequel s'engage un doigt de transmission (62) du mécanisme (26), et l'extrémité opposée étant associée à un repère indicateur de la position ouverture des contacts, visible à travers une fenêtre (122) du capot (18) dans ladite position active.9. Multipolar differential switch according to claim 8, characterized in that said position indicator (110) of the contacts comprises an elbow lever (112) articulated on a pivot (114) secured to the upper plate (116) of the mechanism (26 ) located opposite the cover (18), one end of said lever (112) being provided an oblong hole (118) into which a transmission finger (62) of the mechanism (26) engages, and the opposite end being associated with a marker indicating the position of the opening of the contacts, visible through a window ( 122) of the cover (18) in said active position. 10. Interrupteur différentiel multipolaire selon la revendication 9, caractérisé par le fait que ledit mécanisme déclencheur (26) coopère avec une manette de commande (42) dont l'actionnement vers la position de fermeture assure simultanément le réarmement du mécanisme (26), la fermeture des contacts (78, 80) des différents pôles et la remise de l'indicateur de position (110) en position effacée de repos.10. Multipolar differential switch according to claim 9, characterized in that the said trigger mechanism (26) cooperates with a control handle (42), the actuation of which towards the closed position simultaneously resets the mechanism (26), the closing the contacts (78, 80) of the various poles and returning the position indicator (110) to the erased position of rest.
EP19810400035 1980-01-31 1981-01-13 Low-voltage multi-pole differential switch Expired EP0033671B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8002327 1980-01-31
FR8002327A FR2475291A1 (en) 1980-01-31 1980-01-31 LV multipolar differential protection switch - has spring-mounted contact arms with limited relative rotation and translation

Publications (3)

Publication Number Publication Date
EP0033671A2 true EP0033671A2 (en) 1981-08-12
EP0033671A3 EP0033671A3 (en) 1981-08-26
EP0033671B1 EP0033671B1 (en) 1984-12-19

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ID=9238158

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Application Number Title Priority Date Filing Date
EP19810400035 Expired EP0033671B1 (en) 1980-01-31 1981-01-13 Low-voltage multi-pole differential switch

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EP (1) EP0033671B1 (en)
DE (1) DE3167762D1 (en)
ES (1) ES498187A0 (en)
FR (1) FR2475291A1 (en)
YU (1) YU40245B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500209A1 (en) * 1981-02-18 1982-08-20 Merlin Gerin DIFFERENTIAL SWITCH ADAPTER
FR2581792A1 (en) * 1985-05-31 1986-11-14 Gen Electric BIPOLAR CIRCUIT BREAKER AGAINST ACCIDENTS TO MASS
EP0530392A1 (en) * 1991-09-02 1993-03-10 Siemens Aktiengesellschaft Ground fault circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2923939A1 (en) 2007-11-16 2009-05-22 Schneider Electric Ind Sas ELECTRIC CUTTING APPARATUS

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282715A1 (en) * 1974-08-21 1976-03-19 Condor Werk Frede Kg Geb Leakage current protective switch - mounted on combined current transformer is in case together with test unit electrical part
DE2706647A1 (en) * 1977-02-17 1978-08-24 Bbc Brown Boveri & Cie Faulty current protective circuit breaker - has stationary support for current supply to moving contact lever, coacting with lever conductive surface

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR224860A (en) * 1973-04-05

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282715A1 (en) * 1974-08-21 1976-03-19 Condor Werk Frede Kg Geb Leakage current protective switch - mounted on combined current transformer is in case together with test unit electrical part
DE2706647A1 (en) * 1977-02-17 1978-08-24 Bbc Brown Boveri & Cie Faulty current protective circuit breaker - has stationary support for current supply to moving contact lever, coacting with lever conductive surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500209A1 (en) * 1981-02-18 1982-08-20 Merlin Gerin DIFFERENTIAL SWITCH ADAPTER
FR2581792A1 (en) * 1985-05-31 1986-11-14 Gen Electric BIPOLAR CIRCUIT BREAKER AGAINST ACCIDENTS TO MASS
EP0530392A1 (en) * 1991-09-02 1993-03-10 Siemens Aktiengesellschaft Ground fault circuit breaker

Also Published As

Publication number Publication date
YU21381A (en) 1983-06-30
EP0033671B1 (en) 1984-12-19
FR2475291A1 (en) 1981-08-07
ES8201357A1 (en) 1981-12-16
ES498187A0 (en) 1981-12-16
YU40245B (en) 1985-08-31
EP0033671A3 (en) 1981-08-26
DE3167762D1 (en) 1985-01-31
FR2475291B1 (en) 1982-09-03

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