EP0501844B1 - Protection circuit breaker having a thermo-magnetic sub-assembly - Google Patents

Protection circuit breaker having a thermo-magnetic sub-assembly Download PDF

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Publication number
EP0501844B1
EP0501844B1 EP92400239A EP92400239A EP0501844B1 EP 0501844 B1 EP0501844 B1 EP 0501844B1 EP 92400239 A EP92400239 A EP 92400239A EP 92400239 A EP92400239 A EP 92400239A EP 0501844 B1 EP0501844 B1 EP 0501844B1
Authority
EP
European Patent Office
Prior art keywords
base
coil
support
bimetal strip
electrical device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92400239A
Other languages
German (de)
French (fr)
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EP0501844A1 (en
Inventor
Serge Guenin
Patrick Roger
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 SE
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Schneider Electric SE
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Publication date
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Publication of EP0501844A1 publication Critical patent/EP0501844A1/en
Application granted granted Critical
Publication of EP0501844B1 publication Critical patent/EP0501844B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair

Definitions

  • the object of the invention is to remedy these drawbacks and to produce, for each pole of a switch device of the type mentioned above, the same magnetothermal tripping sub-assembly which is by design very compact.
  • Another object of the invention is to provide such a suitable magnetothermal sub-assembly which is easy to assemble and to assemble in the switching device.
  • the conductive support of the bimetallic strip and the coil carcass are respectively fixed to the base by means of cooperating engagement members.
  • the two large faces of the bimetallic strip are parallel to the longitudinal direction of the support.
  • the lever is a direct percussion lever for the mobile contact support and has advanced coaxial pivots substantially at the foot of the bimetallic strip.
  • the base of the magnetothermal sub-assembly and / or the wings of the coil carcass advantageously have guide ribs intended to slide in grooves made in the housing during assembly of the magnetothermal sub-assembly in the housing.
  • the electrical protection switch designated by the general reference 10 in FIGS. 1 and 2, is a low-voltage double-pole multipole circuit breaker with a single pole, of which only one pole has been shown.
  • the apparatus 10 comprises an insulating housing 11 composed of a base 12 and a cover 13.
  • the housing comprises, on its front face, a projecting part 14 and, on its rear face, elements 15 serving for fixing of the device by snapping onto a standard profile.
  • Each pole of the apparatus 10 comprises a contact bridge 17 carrying two movable contacts 18, 19 arranged on either side of a median plane P - common to all of the poles - and intended to occupy either a position of closure in which they cooperate respectively with two fixed contacts 20, 21 formed on respective conductive parts 22, 23, or an open position in which they are separated from the fixed contacts 20, 21 following an automatic tripping in the event of a fault in overcurrent or manual control.
  • the conductive part 22, FIGS. 1 and 2 is directly connected to a first electrical connection terminal 26, while the conductive part 23 is electrically connected to a second electrical connection terminal 27 via a series electrical assembly composed of a thermal trip device with bimetal generally designated at 28 for protection against overload currents, and with an electromagnetic trip device with striker generally designated at 29 for protection against short-circuit currents.
  • thermal 28 and electromagnetic trip devices with striker 29 of each pole, as well as the associated connection terminal 27, form an integral part of the same monobloc magnetothermal trip sub-assembly designated by the general reference 30, as we will describe in detail later.
  • the apparatus 10, FIGS. 1 and 2 also comprises a triggering mechanism with lock 31, common to all the poles and arranged in a central compartment 32 of flat shape, that is to say of relatively small thickness perpendicular to the median plane P.
  • FIG 1 there is partially shown an embodiment of the lock 31 in the armed position; this comprises a pivoting hook 33 having a spout passing through a lumen 36 formed in a side wall 31a of the lock situated on the side of the magnetothermal sub-assembly 30, and being engaged with a bearing surface of an opening 37 made in the vicinity of the upper end of a flat piece in the form of a strip 38 adjacent to the side wall 31a of the lock, as well as an opening member 39 subject to the action of the hook 33.
  • a pivoting hook 33 having a spout passing through a lumen 36 formed in a side wall 31a of the lock situated on the side of the magnetothermal sub-assembly 30, and being engaged with a bearing surface of an opening 37 made in the vicinity of the upper end of a flat piece in the form of a strip 38 adjacent to the side wall 31a of the lock, as well as an opening member 39 subject to the action of the hook 33.
  • the striker of the electromagnetic trip device 29 of each pole is a pivoting lever 41 which, in normal service (FIG. 1), on the one hand is engaged with a bearing surface of an opening 42 made in the vicinity of the lower end of the strip 38 and, on the other hand, opens out as close as possible to the median plane P by passing through a lumen 43 formed in the side wall 31a of the lock 31.
  • the contact bridge 17, FIG. 1 is biased in the direction of closing of the contacts by a return and pressure spring 44 which also bears against the bottom of the housing 11.
  • the contact bridge 17 can be controlled in the direction of the opening of the contacts by a drive pusher 45 carrying the bridge and belonging to a part common to all of the poles, which part comprising as many pushers as there are poles.
  • the pusher 45 is itself driven, following a short circuit detected by the electromagnetic trip device 29 of each pole, by the striker lever 41 pivoting in a plane substantially transverse to the median plane, and this after triggering the lock 31, of which time to response is greater than the time of percussion of the striker lever 41, by means of the strip 38 driven parallel to the median plane under the action of a traction exerted by the lever during its pivoting; the striker lever 41 therefore constitutes a very rapid contact opening member, while the opening member 39 of the lock 31 in the tripped position constitutes in this case a member for confirming the opening of the contacts, the member 39 moving parallel to the median plane ( Figure 2).
  • the pusher 45 is also driven by the opening member 39 of the lock 31 following the release of the latter either by a manual control member or by a control device (not shown) subject to a trigger bridge partially shown at 48 in FIGS. 1 and 2 and requested by the thermal trigger 28 of each pole in response to an electrical overload detected by the latter.
  • an opening push button or "stop” button causing the triggering of the lock 31 is shown at 50, and at 51 a reset and closing push button or “on” button, these push-buttons 50 and 51 being arranged in the compartment 32 so as to be able to protrude at the front of the housing 11.
  • the push-buttons could be replaced for example by tilting buttons, or even by a single rotary lever for resetting, closing and opening, without departing from the spirit of the invention.
  • the strip 38, the opening member 39 and the striker lever 41 are in the high position (FIG. 1) under normal operating conditions, the operating push button 51 being pressed. They are all three in the low position (FIG. 2) when a short circuit has been detected by the electromagnetic trip device 29; on the other hand, the opening member 39 is alone in the low position when an electrical overload has been detected by the thermal release 28 or when the stop push-button 50 has been pressed.
  • the thermal trip device 28 of the magnetothermal trip sub-assembly 30 of each pole comprises a thin bimetal strip 55 of generally elongated rectangular shape extending in a plane QQ ′ and having a first free end 56 and a second end or foot 57 assembled by any suitable fixing means on a support plate 59 of generally rectangular shape, of given thickness e , made of an electrically conductive material and extending in a plane RR ′ perpendicular to the plane QQ ′.
  • the bimetallic strip 55 is arranged such that its two large opposite lateral faces 55a, 55b are located in the plane QQ ′ parallel to the longitudinal direction of the plate 59.
  • the trigger 28 also includes a heater 61, here in the form of a ribbon, which is applied against the bimetallic strip 55 via an appropriate means of electrical insulation, in this case a thin rectangular insulating sleeve. 62 surrounding the bimetallic strip 55, approximately between the two ends 56, 57 of the latter.
  • the heater 61 has a first end 64 intended to be electrically connected to the conductive part 23 (FIGS. 1 and 2) carrying the fixed contact 21 and a second end 65 connected, for example by welding, at a particular point of the bimetallic strip 55 located at near the free end 56 thereof.
  • the bimetallic strip support plate 59 is composed of a first portion 67, of width l , carrying the bimetal trigger 28 at the end, and of a second portion 68 narrowed relative to the first and extending the latter via two transverse recesses, only one of which is visible at 69 in FIG. 3; the plate 59 has, at the end of its portion 68 opposite to that carrying the bimetallic strip, a part 70 folded at 90 °.
  • the sub-assembly 30, FIG. 3 comprises a molded insulating base or base 72 of rectangular shape, of length L greater than that of the plate 59 and of the same width l as the portion 67 of the plate carrying the bimetallic strip 55, and having a front end 73 and a rear end 74.
  • the base 72 is provided, on its two longitudinal upper edges 76, 77, with two respective longitudinal risers 78, 79 insulating and molded, having a height h slightly greater than the thickness e of the plate 59.
  • the base 72 also has an insulating fixing pin 83 molded which cooperates with an opening 84 formed in the portion 68 of the wafer 59 during the mounting of the wafer assembly 59 - bimetal thermal release 28 on the base 72 (see FIGS. 3 and 4).
  • the electromagnetic trip device with striker 29 of the sub-assembly 30 of each pole comprises a coil carcass, designated by the reference general 86 in FIG. 3, molded from an insulating material and having two parallel flat wings 87, 88 with the same center distance as that existing between the two risers 78, 79, and joined transversely to their top by a flat spacer 89 surmounted perpendicularly by a hollow tube 90 around which a control coil 91 is wound, as visible in FIGS. 1 and 2.
  • the electromagnetic trip device 29 also includes a magnetic circuit housed inside the tube 90 of the coil carcass and formed of a fixed cylindrical core 92 and of a movable sliding core shaped like a cylindrical plunger 93 axially aligned with the fixed core 92.
  • the fixed core 92 is made integral with the tube 90, at the upper end thereof, by any suitable holding means, and a helical return spring 94 is mounted in abutment on the respective polar faces, facing one another, of the fixed 92 and mobile 93 cores.
  • the plunger core 93 is extended axially by a tail 95 projecting from the tube 90 when said core 93 is in the rest position (FIG. 1) and coupled to the striker lever 41 of the electromagnetic trip device.
  • the striker lever 41 has two parallel arms 96, 97 ( Figure 5), one of which (96) is longer than the other (97) and constitutes a percussion arms, connected transversely by a coupling fork 98 with two teeth between which the tail 95 of the plunger core 93 is inserted, as seen in FIG. 6.
  • the two arms 96, 97 of the striker lever 41, FIG. 5, carry, on their respective external faces, two coaxial pivots 101, 102 intended to engage respectively in two corresponding orifices 103, 104 ( Figure 3) practiced in terminal conformations 105, 106 provided on the respective two wings 87, 88 of the coil carcass 86, at the base thereof.
  • the striker lever 41 is preferably made by molding in an insulating material.
  • the coil housing 86 of the electromagnetic trip device 29 also has two parallel vertical sides 109, 110 formed from the spacer 89, in the rear extension of the two wings 87, 88 and connected transversely to their respective bases, by a vertical veil 112 intended to come to cooperate with an insulating heel 113 molded with the base 72 and disposed transversely on the upper face 81 of the base, at the rear end 74 thereof.
  • the electrical connection terminal 27, FIG. 3, associated with the sub-assembly 30 is intended to be housed between the two sides 109, 110 of the coil carcass 86.
  • This terminal 27, in this case of the screw-caliper type, is connected to a conductive part 115, better visible in FIG. 3, comprising a first flat branch 116 provided with a threaded central hole 117 intended to receive the terminal 27 and with two lateral projections, only one of which is visible at 118 in the figure 3, intended to cooperate with two openings 119, 120 formed respectively in the two sides 109, 110 of the coil-carcass.
  • This first branch 116 of the conductive part 115 continues via a 90 ° bend, by a second branch 122 intended to go along the coil 91 (see FIGS. 1 and 2) and continuing through a new 90 ° bend, by a third branch 123 intended to bear partially on the upper end of the tube 90 (see FIGS. 1 and 2) and having a portion 124 folded at 90 °.
  • the coil 91 is mounted around the tube 90 of the coil carcass 86 and the plunger core 93 is introduced into said tube 90 and is coupled by its tail 95 to the striker lever 41, which is then pivotally mounted on the two wings 87, 88 of the coil-carcass.
  • the return spring 94 and the fixed core 92 are then introduced into the tube 90; the conductive part 115 associated with the connection terminal 27 is made integral with the coil carcass 86 by engagement of the two projections 118 in the two slots 119, 120 of the respective flanks 109, 110 of the coil carcass, the end 91a of the coil 91 coming to bear against the portion 124 folded at 90 ° to the conductive part 115.
  • FIG. 4 shows this assembly of the electromagnetic trip device with striker 29, in association with terminal 27.
  • said electromagnetic trip unit with striker 29 - terminal 27 is then mounted on the base 72 by engagement, on the one hand, of the two wings 87, 88 of the coil carcass 86 on the two risers 78, 79 and, on the other hand, of the web 112 of the coil carcass 86 on the heel 113, by means of cooperating fasteners, such as for example tenons and mortises.
  • FIG. 7 represents the magnetothermal sub-assembly 30 once assembled.
  • the two ends 91a and 91b of the coil 91 (FIG. 3) are electrically connected, for example by welding carried out in a single operation, respectively to the portion 124 of the part.
  • the sub-assembly 30 being assembled, the bimetallic strip 55 and the tube 90 housing the magnetic circuit of the electromagnetic trip device 29 are parallel coplanar, while the percussion arm 96 of the pivoting lever 41 extends laterally to one of the large faces of the bimetallic strip 55 so as not to be hampered by the latter; in the rest position, FIG. 7, the percussion arm 96 is moreover situated substantially at the foot of the bimetallic strip 55, extending beyond the anterior end 73 of the base 72.
  • the lower face 128 of the base 72 is provided, in the vicinity of its rear end 74, with two insulating members shaped as hooks, only one of which is visible at 129 in these figures, between which a first is inserted.
  • the front end 73 of the base 72 is bordered by an insulating cross member 133 provided with hooking members 134 (FIG. 8) cooperating with notches 135 formed in a second flat end branch 136 of the fixed contact carrier arm 23, opposite the first and folded at 90 ° (see Figures 8 and 9).
  • the two hooks 129 and the cross-member 133 come from molding with the base 72.
  • the fixed contact support arm 23 therefore forms an integral part of the sub-assembly 30 as illustrated in FIG. 8.
  • the branch 136 of said arm 23 is electrically connected, for example by welding, on the end 64 of the heater 61 of the bimetal thermal trip device 28.
  • FIG. 8 there are shown at 140 longitudinal guide ribs coming from molding and formed on the base 72 of the sub-assembly 30 as well as on the wings 87, 88 of the coil-carcass 86; these ribs 140 are provided to slide in longitudinal grooves 142 (FIG. 11) formed in two interpolar walls 11a, 11b of the housing 11 during the mounting of the magnetothermal sub-assembly 30 equipped with the fixed contact carrier arm 23 in the housing.
  • longitudinal guide ribs coming from molding and formed on the base 72 of the sub-assembly 30 as well as on the wings 87, 88 of the coil-carcass 86; these ribs 140 are provided to slide in longitudinal grooves 142 (FIG. 11) formed in two interpolar walls 11a, 11b of the housing 11 during the mounting of the magnetothermal sub-assembly 30 equipped with the fixed contact carrier arm 23 in the housing.
  • the base 72 of this sub-assembly 30 extends longitudinally in a direction perpendicular to the median plane P.
  • an electrical overload detected by the bimetallic strip 55 causes it to deflect which actuates the trigger bridge 48, which drives a control device, symbolized by the arrow F, which acts on the hook 33 to release it from the strip 38; by this release, the hook 33 pivots clockwise and causes the lock 31 to fire.
  • the opening member 39 descends to strike the pusher 45 which drives the bridge 17 and causes the contacts to open.
  • the plunger core 93 moves by attraction towards the fixed core 92 and causes the striker lever 41 which is coupled to it to pivot.
  • the lever 41 drives the slide 38 which descends to trigger the lock 31 by releasing the hook 33 vis-à-vis the slide, the released hook 33 pivoting clockwise.
  • the response time of which is greater than the time of percussion of the lever 41, the latter strikes the pusher 45 which drives the bridge 17 and causes the opening of the contacts, this opening being confirmed by descent and application of the 'opening member 39 on the pusher 45 ( Figure 2).
  • the striker lever 41 - plunger core 93 assembly returns to its position in FIG. 1 under the action of the return spring 94, the return of the striker lever 41 causing the strip 38 to rise.

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  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Description

La présente invention est relative à un appareil électrique interrupteur de protection du genre disjoncteur à double coupure, comprenant dans un boîtier :

  • au moins un chemin de courant polaire établi entre deux bornes de raccordement électrique et muni d'au moins un support de contact mobile, coopérant avec un contact fixe ;
  • pour chaque chemin polaire, un sous-ensemble magnétothermique de déclenchement comportant :
    • un déclencheur thermique muni d'un bilame monté perpendiculairement sur un support conducteur plat, à l'une des extrémités de celui-ci, ledit bilame étant électriquement relié au contact fixe et étant apte à commander l'ouverture des contacts via un mécanisme de déclenchement en réponse à un courant de surcharge,
    • un déclencheur électromagnétique comprenant :
      • . une carcasse-bobine en matière isolante présentant un tube autour duquel est enroulée une bobine de commande, et dans lequel peut coulisser un noyau magnétique mobile en réponse à un courant de court-circuit dans le chemin de courant polaire,
      • . un levier commandé par le noyau mobile pour ouvrir les contacts en réponse à un courant de court-circuit.
The present invention relates to an electrical protection switch device of the double break circuit breaker type, comprising in a housing:
  • at least one polar current path established between two electrical connection terminals and provided with at least one movable contact support, cooperating with a fixed contact;
  • for each polar path, a magnetothermal triggering sub-assembly comprising:
    • a thermal trip device provided with a bimetallic strip mounted perpendicularly on a flat conductive support, at one of its ends, said bimetallic strip being electrically connected to the fixed contact and being capable of controlling the opening of the contacts via a tripping mechanism in response to an overload current,
    • an electromagnetic trip device comprising:
      • . a coil carcass of insulating material having a tube around which a control coil is wound, and in which a movable magnetic core can slide in response to a short-circuit current in the polar current path,
      • . a lever controlled by the movable core to open the contacts in response to a short circuit current.

Dans des appareils disjoncteurs de ce genre, de même que dans celui qui se trouve décrit dans le brevet EP-A-281 443, il s'avère que, par leur conception, les sous-ensembles magnétothermiques de déclencnement sont relativement encombrants et volumineux. Ces sous-ensembles magnétothermiques sont également relativement complexes à réaliser en raison des difficuités d'assemblage du déclencheur thermique et du déclencneur électromagnétique à percuteur.In circuit breaker devices of this type, as well as that which is described in patent EP-A-281 443, it turns out that, by their design, the magnetothermal tripping subassemblies are relatively bulky and bulky. These magnetothermal sub-assemblies are also relatively complex to produce due to the difficulties in assembling the thermal trip device and the electromagnetic trip device with striker.

L'invention a pour but de remédier à ces inconvénients et de réaliser, pour chaque pôle d'un appareil interrupteur du type rappelé ci-dessus, un même sous-ensemble de déclenchement magnétothermique qui soit par conception de grande compacité.The object of the invention is to remedy these drawbacks and to produce, for each pole of a switch device of the type mentioned above, the same magnetothermal tripping sub-assembly which is by design very compact.

Un autre but de l'invention est de fournir un tel sous-ensemble magnétothermique approprié qui soit facile à assembler et à monter dans l'appareil interrupteur.Another object of the invention is to provide such a suitable magnetothermal sub-assembly which is easy to assemble and to assemble in the switching device.

Selon l'invention, un appareil électrique interrupteur de protection du type décrit précédemment, est plus particulièrement caractérisé en ce que :

  • le sous-ensemble magnétothermique comporte un socle en matière isolante de forme allongée, présentant une extrémité antérieure proche du contact fixe et logeant fixement à plat le support portant le bilame ;
  • le levier du déclencheur électromagnétique est un percuteur pour le support du contact mobile, ce levier percuteur étant monté pivotant sur la carcasse de bobine et s'étendant latéralement au bilame au-delà de l'extrémité antérieure du socle,
  • le support du bilame et la carcasse de bobine sont montés en chevauchement mutuel sur le socle.
According to the invention, an electrical protection switch device of the type described above, is more particularly characterized in that:
  • the magnetothermal sub-assembly comprises a base made of insulating material of elongated shape, having an anterior end close to the fixed contact and fixedly housing the support carrying the bimetallic strip;
  • the lever of the electromagnetic trip device is a striker for the support of the movable contact, this striker lever being pivotally mounted on the coil carcass and extending laterally to the bimetallic strip beyond the front end of the base,
  • the support of the bimetallic strip and the coil carcass are mounted in mutual overlap on the base.

Dans une forme d'exécution préférée, le support conducteur du bilame et la carcasse de bobine sont respectivement fixés au socle au moyen d'organes coopérant d'engagement. Les deux grandes faces du bilame sont parallèles à la direction longitudinale du support. Le levier est un levier de percussion directe pour le support de contact mobile et présente des pivots coaxiaux avancés sensiblement au niveau du pied du bilame.In a preferred embodiment, the conductive support of the bimetallic strip and the coil carcass are respectively fixed to the base by means of cooperating engagement members. The two large faces of the bimetallic strip are parallel to the longitudinal direction of the support. The lever is a direct percussion lever for the mobile contact support and has advanced coaxial pivots substantially at the foot of the bimetallic strip.

Le socle du sous-ensemble magnétothermique et/ou les ailes de la carcasse-bobine présentent avantageusement des nervures de guidage prévues pour coulisser dans des rainures ménagées dans le boîtier lors du montage du sous-ensemble magnétothermique dans le boîtier.The base of the magnetothermal sub-assembly and / or the wings of the coil carcass advantageously have guide ribs intended to slide in grooves made in the housing during assembly of the magnetothermal sub-assembly in the housing.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :

  • Les figures 1 et 2 sont des vues schématiques en élévation partielle d'un appareil disjoncteur à double coupure équipé par pôle d'un sous-ensemble magnétothermique de déclenchement conforme à l'invention, respectivement dans les positions de fermeture et d'ouverture en cas de court-circuit ;
  • La figure 3 montre à échelle agrandie une vue en perspective éclatée du sous-ensemble magnétothermique associé à une borne de raccordement selon la figure 1 ;
  • La figure 4 est une vue en perspective du sous-ensemble de la figure 3, après montage du déclencheur thermique sur le socle et assemblage des constituants du déclencheur électromagnétique à percuteur en association avec la borne ;
  • La figure 5 est une vue de dessus du levier percuteur du déclencheur électromagnétique ;
  • La figure 6 est une vue en perspective du levier percuteur attelé au noyau magnétique mobile du déclencheur électromagnétique ;
  • La figure 7 est une vue en perspective du sous-ensemble de la figure 4, après montage de l'association déclencheur électromagnétique / borne sur le socle ;
  • La figure 8 est une vue analogue à la figure 7 montrant l'association du sous-ensemble avec une pièce conductrice portant un contact fixe ;
  • La figure 9 est une vue en perspective de la pièce porte-contact selon la figure 8 ;
  • La figure 10 est une vue en perspective partielle de la pièce porte-contact en position retournée, montrant le contact fixe ; et
  • La figure 11 représente schématiquement en coupe transversale partielle l'appareil disjoncteur de la figure 1 selon un plan passant par l'axe de coulissement du noyau mobile du déclencheur électromagnétique, montrant la présence de rainures dans le boîtier servant de guides au sous-ensemble magnétothermique lors de son montage dans le boîtier.
Other characteristics and advantages of the invention will appear more clearly in the detailed description which follows and which refers to the appended drawings given solely by way of example and in which:
  • Figures 1 and 2 are schematic views in partial elevation of a double break circuit breaker device equipped with pole of a trip thermomagnetic sub-assembly according to the invention, respectively in the closed and open positions in case short circuit;
  • Figure 3 shows on an enlarged scale an exploded perspective view of the magnetothermal sub-assembly associated with a connection terminal according to Figure 1;
  • Figure 4 is a perspective view of the sub-assembly of Figure 3, after mounting the thermal release on the base and assembly of the components of the electromagnetic trip device with striker in association with the terminal;
  • Figure 5 is a top view of the striker lever of the electromagnetic trip device;
  • Figure 6 is a perspective view of the striker lever coupled to the movable magnetic core of the electromagnetic trip device;
  • Figure 7 is a perspective view of the sub-assembly of Figure 4, after mounting of the electromagnetic trip / terminal combination on the base;
  • Figure 8 is a view similar to Figure 7 showing the association of the sub-assembly with a conductive part carrying a fixed contact;
  • Figure 9 is a perspective view of the contact carrier part according to Figure 8;
  • Figure 10 is a partial perspective view of the contact carrier part in the inverted position, showing the fixed contact; and
  • Figure 11 schematically shows in partial cross section the circuit breaker device of Figure 1 along a plane passing through the sliding axis of the movable core of the electromagnetic trip device, showing the presence of grooves in the housing serving as guides for the magnetothermal sub-assembly when mounted in the housing.

L'appareil électrique interrupteur de protection, désigné par la référence générale 10 sur les figures 1 et 2, est un disjoncteur multipolaire basse tension à double coupure dont un seul pôle a été représenté.The electrical protection switch, designated by the general reference 10 in FIGS. 1 and 2, is a low-voltage double-pole multipole circuit breaker with a single pole, of which only one pole has been shown.

L'appareil 10 comprend un boîtier isolant 11 composé d'un socle 12 et d'un couvercle 13. Le boîtier comporte, sur sa face avant, une partie en saillie 14 et, sur sa face arrière, des éléments 15 servant à la fixation de l'appareil par encliquetage sur un profilé normalisé.The apparatus 10 comprises an insulating housing 11 composed of a base 12 and a cover 13. The housing comprises, on its front face, a projecting part 14 and, on its rear face, elements 15 serving for fixing of the device by snapping onto a standard profile.

Chaque pôle de l'appareil 10 comporte un pont de contact 17 portant deux contacts mobiles 18, 19 disposés de part et d'autre d'un plan médian P - commun à l'ensemble des pôles - et destinés à occuper soit une position de fermeture dans laquelle ils coopèrent respectivement avec deux contacts fixes 20, 21 formés sur des pièces conductrices respectives 22, 23, soit une position d'ouverture dans laquelle ils sont séparés des contacts fixes 20, 21 suite à un déclenchement automatique en cas de défaut de surintensité ou à une commande manuelle.Each pole of the apparatus 10 comprises a contact bridge 17 carrying two movable contacts 18, 19 arranged on either side of a median plane P - common to all of the poles - and intended to occupy either a position of closure in which they cooperate respectively with two fixed contacts 20, 21 formed on respective conductive parts 22, 23, or an open position in which they are separated from the fixed contacts 20, 21 following an automatic tripping in the event of a fault in overcurrent or manual control.

La pièce conductrice 22, figures 1 et 2, est directement connectée à une première borne de raccordement électrique 26, tandis que la pièce conductrice 23 est reliée électriquement à une seconde borne de raccordement électrique 27 via un montage électrique série composé d'un déclencheur thermique à bilame désigné globalement en 28 pour la protection contre les courants de surcharge, et d'un déclencheur électromagnétique à percuteur désigné globalement en 29 pour la protection contre les courants de court-circuit.The conductive part 22, FIGS. 1 and 2, is directly connected to a first electrical connection terminal 26, while the conductive part 23 is electrically connected to a second electrical connection terminal 27 via a series electrical assembly composed of a thermal trip device with bimetal generally designated at 28 for protection against overload currents, and with an electromagnetic trip device with striker generally designated at 29 for protection against short-circuit currents.

Conformément à l'invention, les déclencheurs thermique 28 et électromagnétique à percuteur 29 de chaque pôle, ainsi que la borne de raccordement associée 27, font partie intégrante d'un même sous-ensemble monobloc de déclenchement magnétothermique désigné par le repère général 30, que l'on décrira en détail plus loin.In accordance with the invention, the thermal 28 and electromagnetic trip devices with striker 29 of each pole, as well as the associated connection terminal 27, form an integral part of the same monobloc magnetothermal trip sub-assembly designated by the general reference 30, as we will describe in detail later.

L'appareil 10, figures 1 et 2, comprend également un mécanisme de déclenchement à serrure 31, commun à l'ensemble des pôles et disposé dans un compartiment central 32 de forme plate, c'est-à-dire d'épaisseur relativement faible perpendiculairement au plan médian P.The apparatus 10, FIGS. 1 and 2, also comprises a triggering mechanism with lock 31, common to all the poles and arranged in a central compartment 32 of flat shape, that is to say of relatively small thickness perpendicular to the median plane P.

Sur la figure 1, on a montré partiellement un exemple de réalisation de la serrure 31 en position armée ; celle-ci comporte un crochet pivotant 33 présentant un bec traversant une lumière 36 ménagée dans une paroi latérale 31a de la serrure située du côté du sous-ensemble magnétothermique 30, et étant en prise avec une surface d'appui d'une ouverture 37 pratiquée au voisinage de l'extrémité supérieure d'une pièce plate en forme de réglette 38 adjacente à la paroi latérale 31a de la serrure, ainsi qu'un organe d'ouverture 39 assujetti à l'action du crochet 33.In Figure 1, there is partially shown an embodiment of the lock 31 in the armed position; this comprises a pivoting hook 33 having a spout passing through a lumen 36 formed in a side wall 31a of the lock situated on the side of the magnetothermal sub-assembly 30, and being engaged with a bearing surface of an opening 37 made in the vicinity of the upper end of a flat piece in the form of a strip 38 adjacent to the side wall 31a of the lock, as well as an opening member 39 subject to the action of the hook 33.

Dans cet exemple, le percuteur du déclencheur électromagnétique 29 de chaque pôle est un levier pivotant 41 qui, en service normal (figure 1), d'une part est en prise avec une surface d'appui d'une ouverture 42 pratiquée au voisinage de l'extrémité inférieure de la réglette 38 et, d'autre part, débouche aussi près que possible du plan médian P en traversant une lumière 43 ménagée dans la paroi latérale 31a de la serrure 31.In this example, the striker of the electromagnetic trip device 29 of each pole is a pivoting lever 41 which, in normal service (FIG. 1), on the one hand is engaged with a bearing surface of an opening 42 made in the vicinity of the lower end of the strip 38 and, on the other hand, opens out as close as possible to the median plane P by passing through a lumen 43 formed in the side wall 31a of the lock 31.

Le pont de contact 17, figure 1, est sollicité dans le sens de la fermeture des contacts par un ressort 44 de rappel et de pression par ailleurs en appui contre le fond du boîtier 11. Le pont de contact 17 est commandable dans le sens de l'ouverture des contacts par un poussoir d'entraînement 45 portant le pont et appartenant à une pièce commune à l'ensemble des pôles, laquelle pièce comprenant autant de poussoirs qu'il y a de pôles.The contact bridge 17, FIG. 1, is biased in the direction of closing of the contacts by a return and pressure spring 44 which also bears against the bottom of the housing 11. The contact bridge 17 can be controlled in the direction of the opening of the contacts by a drive pusher 45 carrying the bridge and belonging to a part common to all of the poles, which part comprising as many pushers as there are poles.

Le poussoir 45 est lui-même entraîné, suite à un court-circuit détecté par le déclencheur électromagnétique 29 de chaque pôle, par le levier percuteur 41 pivotant dans un plan sensiblement transversal au plan médian, et ce après déclenchement de la serrure 31, dont le temps de réponse est supérieur au temps de percussion du levier percuteur 41, au moyen de la réglette 38 entraînée parallèlement au plan médian sous l'action d'une traction exercée par le levier au cours de son pivotement ; le levier percuteur 41 constitue donc un organe d'ouverture très rapide des contacts, tandis que l'organe d'ouverture 39 de la serrure 31 en position déclenchée constitue dans ce cas un organe de confirmation de l'ouverture des contacts, l'organe 39 se déplaçant parallèlement au plan médian (figure 2).The pusher 45 is itself driven, following a short circuit detected by the electromagnetic trip device 29 of each pole, by the striker lever 41 pivoting in a plane substantially transverse to the median plane, and this after triggering the lock 31, of which time to response is greater than the time of percussion of the striker lever 41, by means of the strip 38 driven parallel to the median plane under the action of a traction exerted by the lever during its pivoting; the striker lever 41 therefore constitutes a very rapid contact opening member, while the opening member 39 of the lock 31 in the tripped position constitutes in this case a member for confirming the opening of the contacts, the member 39 moving parallel to the median plane (Figure 2).

Le poussoir 45, figure 1, est également entraîné par l'organe d'ouverture 39 de la serrure 31 suite au déclenchement de celle-ci soit par un organe de commande manuelle, soit par un dispositif de commande (non représenté) assujetti à un pont de déclenchement représenté partiellement en 48 sur les figures 1 et 2 et sollicité par le déclencheur thermique 28 de chaque pôle en réponse à une surcharge électrique détectée par celui-ci.The pusher 45, Figure 1, is also driven by the opening member 39 of the lock 31 following the release of the latter either by a manual control member or by a control device (not shown) subject to a trigger bridge partially shown at 48 in FIGS. 1 and 2 and requested by the thermal trigger 28 of each pole in response to an electrical overload detected by the latter.

On obtient ainsi dans chacun des modes de fonctionnement (mode disjoncteur ou manuel) une double coupure ; des dispositifs d'extinction d'arc 49 sont associés à chaque chambre de coupure.One thus obtains in each of the operating modes (circuit breaker or manual mode) a double break; arc extinguishing devices 49 are associated with each breaking chamber.

Sur les figures 1 et 2, on a représenté en 50 un bouton-poussoir d'ouverture ou bouton "arrêt" provoquant le déclenchement de la serrure 31, et en 51 un bouton-poussoir de réarmement et de fermeture ou bouton "marche", ces boutons-poussoirs 50 et 51 étant disposés dans le compartiment 32 de manière à pouvoir faire saillie à l'avant du boîtier 11. Il convient de signaler ici que les boutons-poussoirs pourraient être remplacés par exemple par des boutons basculants, ou encore par une seule manette rotative de réarmement, fermeture et ouverture, sans s'écarter pour autant de l'esprit de l'invention.In FIGS. 1 and 2, an opening push button or "stop" button causing the triggering of the lock 31 is shown at 50, and at 51 a reset and closing push button or "on" button, these push-buttons 50 and 51 being arranged in the compartment 32 so as to be able to protrude at the front of the housing 11. It should be noted here that the push-buttons could be replaced for example by tilting buttons, or even by a single rotary lever for resetting, closing and opening, without departing from the spirit of the invention.

La réglette 38, l'organe d'ouverture 39 et le levier percuteur 41 sont en position haute (figure 1) dans les conditions de marche normale, le bouton-poussoir marche 51 étant enfoncé. Ils sont tous les trois en position basse (figure 2) lorsqu'un court-circuit a été détecté par le déclencheur électromagnétique 29 ; par contre, l'organe d'ouverture 39 est seul en position basse lorsqu'une surcharge électrique a été détectée par le déclencheur thermique 28 ou lorsqu'on a enfoncé le bouton-poussoir arrêt 50.The strip 38, the opening member 39 and the striker lever 41 are in the high position (FIG. 1) under normal operating conditions, the operating push button 51 being pressed. They are all three in the low position (FIG. 2) when a short circuit has been detected by the electromagnetic trip device 29; on the other hand, the opening member 39 is alone in the low position when an electrical overload has been detected by the thermal release 28 or when the stop push-button 50 has been pressed.

En référence à la figure 3, le déclencheur thermique 28 du sous-ensemble de déclenchement magnétothermique 30 de chaque pôle comporte un bilame 55 mince de forme générale rectangulaire allongée s'étendant dans un plan QQ′ et ayant une première extrémité libre 56 et une seconde extrémité ou pied 57 assemblé par tout moyen de fixation approprié sur une plaquette de support 59 de forme générale rectangulaire, d'épaisseur donnée e, réalisée en un matériau électriquement conducteur et s'étendant dans un plan RR′ perpendiculaire au plan QQ′. Comme le montre la figure 3, le bilame 55 est agencé de telle sorte que ses deux grandes faces latérales opposées 55a, 55b soient situées dans le plan QQ′ parallèlement à la direction longitudinale de la plaquette 59.With reference to FIG. 3, the thermal trip device 28 of the magnetothermal trip sub-assembly 30 of each pole comprises a thin bimetal strip 55 of generally elongated rectangular shape extending in a plane QQ ′ and having a first free end 56 and a second end or foot 57 assembled by any suitable fixing means on a support plate 59 of generally rectangular shape, of given thickness e , made of an electrically conductive material and extending in a plane RR ′ perpendicular to the plane QQ ′. As shown in FIG. 3, the bimetallic strip 55 is arranged such that its two large opposite lateral faces 55a, 55b are located in the plane QQ ′ parallel to the longitudinal direction of the plate 59.

Dans l'exemple illustré à la figure 3, le déclencheur 28 comporte également une chaufferette 61, ici en forme de ruban, qui est appliquée contre le bilame 55 via un moyen approprié d'isolation électrique, en l'occurrence un mince manchon isolant rectangulaire 62 entourant le bilame 55, approximativement entre les deux extrémités 56, 57 de ce dernier. La chaufferette 61 possède une première extrémité 64 destinée à être reliée électriquement à la pièce conductrice 23 (figures 1 et 2) portant le contact fixe 21 et une seconde extrémité 65 reliée, par exemple par soudage, en un point particulier du bilame 55 situé à proximité de l'extrémité libre 56 de celui-ci.In the example illustrated in FIG. 3, the trigger 28 also includes a heater 61, here in the form of a ribbon, which is applied against the bimetallic strip 55 via an appropriate means of electrical insulation, in this case a thin rectangular insulating sleeve. 62 surrounding the bimetallic strip 55, approximately between the two ends 56, 57 of the latter. The heater 61 has a first end 64 intended to be electrically connected to the conductive part 23 (FIGS. 1 and 2) carrying the fixed contact 21 and a second end 65 connected, for example by welding, at a particular point of the bimetallic strip 55 located at near the free end 56 thereof.

La plaquette 59 de support du bilame se compose d'une première portion 67, de largeur l, portant en extrémité le déclencheur à bilame 28, et d'une seconde portion 68 rétrécie relativement à la première et prolongeant celle-ci par l'intermédiaire de deux décrochements transversaux dont un seul est visible en 69 sur la figure 3 ; la plaquette 59 présente, à l'extrémité de sa portion 68 opposée à celle portant le bilame, une partie 70 pliée à 90°.The bimetallic strip support plate 59 is composed of a first portion 67, of width l , carrying the bimetal trigger 28 at the end, and of a second portion 68 narrowed relative to the first and extending the latter via two transverse recesses, only one of which is visible at 69 in FIG. 3; the plate 59 has, at the end of its portion 68 opposite to that carrying the bimetallic strip, a part 70 folded at 90 °.

Le sous-ensemble 30, figure 3, comporte une semelle ou socle isolant moulé 72 de forme rectangulaire, de longueur L supérieure à celle de la plaquette 59 et de même largeur l que la portion 67 de la plaquette portant le bilame 55, et présentant une extrémité antérieure 73 et une extrémité postérieure 74. Le socle 72 est doté, sur ses deux bords supérieurs longitudinaux 76, 77, de deux rehausses longitudinales respectives 78, 79 isolantes et venues de moulage, ayant une hauteur h légèrement supérieure à l'épaisseur e de la plaquette 59. Ces rehausses 78, 79 sont disposées en des emplacements respectifs tels qu'après assemblage du déclencheur à bilame 28 et de sa plaquette de support 59, les deux décrochements transversaux 69 de la plaquette 59 viennent en appui respectivement contre les deux rehausses du socle 72 lors du montage à plat, sur la face supérieure 81 du socle, de la plaquette 59 supportant le bilame 55, lequel bilame étant alors situé au voisinage de l'extrémité antérieure 73 du socle, comme visible à la figure 4. Le socle 72 possède de plus un pion de fixation isolant 83 venu de moulage qui coopère avec une ouverture 84 pratiquée dans la portion 68 de la plaquette 59 lors du montage de l'ensemble plaquette 59 - déclencheur thermique à bilame 28 sur le socle 72 (voir figures 3 et 4).The sub-assembly 30, FIG. 3, comprises a molded insulating base or base 72 of rectangular shape, of length L greater than that of the plate 59 and of the same width l as the portion 67 of the plate carrying the bimetallic strip 55, and having a front end 73 and a rear end 74. The base 72 is provided, on its two longitudinal upper edges 76, 77, with two respective longitudinal risers 78, 79 insulating and molded, having a height h slightly greater than the thickness e of the plate 59. These extensions 78, 79 are arranged in respective locations such that after assembly of the bimetallic trip unit 28 and its support plate 59, the two transverse recesses 69 of the plate 59 come to bear respectively against the two risers of the base 72 during flat mounting, on the upper face 81 of the base, of the plate 59 supporting the bimetallic strip 55, which bimetallic strip is then located in the vicinity from the front end 73 of the base, as visible in FIG. 4. The base 72 also has an insulating fixing pin 83 molded which cooperates with an opening 84 formed in the portion 68 of the wafer 59 during the mounting of the wafer assembly 59 - bimetal thermal release 28 on the base 72 (see FIGS. 3 and 4).

En regard de la figure 3, le déclencheur électromagnétique à percuteur 29 du sous-ensemble 30 de chaque pôle comporte une carcasse-bobine, désignée par le repère général 86 sur la figure 3, moulée en une matière isolante et présentant deux ailes planes parallèles 87, 88 de même entraxe que celui existant entre les deux rehausses 78, 79, et réunies transversalement à leur sommet par une entretoise plane 89 surmontée perpendiculairement par un tube creux 90 autour de laquelle est enroulée une bobine de commande 91, comme visible aux figures 1 et 2.With reference to FIG. 3, the electromagnetic trip device with striker 29 of the sub-assembly 30 of each pole comprises a coil carcass, designated by the reference general 86 in FIG. 3, molded from an insulating material and having two parallel flat wings 87, 88 with the same center distance as that existing between the two risers 78, 79, and joined transversely to their top by a flat spacer 89 surmounted perpendicularly by a hollow tube 90 around which a control coil 91 is wound, as visible in FIGS. 1 and 2.

Sur les figures 1 et 2, le déclencheur électromagnétique 29 comporte également un circuit magnétique logé à l'intérieur du tube 90 de la carcasse-bobine et formé d'un noyau fixe cylindrique 92 et d'un noyau mobile à coulissement conformé en plongeur cylindrique 93 axialement aligné avec le noyau fixe 92. Le noyau fixe 92 est rendu solidaire du tube 90, à l'extrémité supérieure de celui-ci, par tout moyen de maintien approprié, et un ressort hélicoïdal de rappel 94 est monté en appui sur les faces polaires respectives, en regard l'une de l'autre, des noyaux fixe 92 et mobile 93.In FIGS. 1 and 2, the electromagnetic trip device 29 also includes a magnetic circuit housed inside the tube 90 of the coil carcass and formed of a fixed cylindrical core 92 and of a movable sliding core shaped like a cylindrical plunger 93 axially aligned with the fixed core 92. The fixed core 92 is made integral with the tube 90, at the upper end thereof, by any suitable holding means, and a helical return spring 94 is mounted in abutment on the respective polar faces, facing one another, of the fixed 92 and mobile 93 cores.

Le noyau plongeur 93 se prolonge axialement par une queue 95 faisant saillie hors du tube 90 lorsque ledit noyau 93 est en position de repos (figure 1) et accouplée au levier percuteur 41 du déclencheur électromagnétique.The plunger core 93 is extended axially by a tail 95 projecting from the tube 90 when said core 93 is in the rest position (FIG. 1) and coupled to the striker lever 41 of the electromagnetic trip device.

Dans l'exemple de réalisation illustré sur les figures 3 et 5, le levier percuteur 41 présente deux bras parallèles 96, 97 (figure 5), dont l'un (96) est plus long que l'autre (97) et constitue un bras de percussion, reliés transversalement par une fourche d'attelage 98 à deux dents entre lesquelles est insérée la queue 95 du noyau plongeur 93, comme on le voit à la figure 6.In the embodiment illustrated in Figures 3 and 5, the striker lever 41 has two parallel arms 96, 97 (Figure 5), one of which (96) is longer than the other (97) and constitutes a percussion arms, connected transversely by a coupling fork 98 with two teeth between which the tail 95 of the plunger core 93 is inserted, as seen in FIG. 6.

Les deux bras 96, 97 du levier percuteur 41, figure 5, portent, sur leurs faces externes respectives, deux pivots coaxiaux 101, 102 destinés à venir s'engager respectivement dans deux orifices correspondants 103, 104 (figure 3) pratiqués dans des conformations terminales 105, 106 prévues sur les deux ailes respectives 87, 88 de la carcasse-bobine 86, à la base de celles-ci.The two arms 96, 97 of the striker lever 41, FIG. 5, carry, on their respective external faces, two coaxial pivots 101, 102 intended to engage respectively in two corresponding orifices 103, 104 (Figure 3) practiced in terminal conformations 105, 106 provided on the respective two wings 87, 88 of the coil carcass 86, at the base thereof.

Le levier percuteur 41 est réalisé de préférence par moulage en une matière isolante.The striker lever 41 is preferably made by molding in an insulating material.

Comme le montre la figure 3, la carcasse-bobine 86 du déclencheur électromagnétique 29 présente également deux flancs verticaux parallèles 109, 110 formés à partir de l'entretoise 89, dans le prolongement arrière des deux ailes 87, 88 et reliés transversalement, à leurs bases respectives, par un voile vertical 112 destiné à venir coopérer avec un talon 113 isolant venu de moulage avec le socle 72 et disposé transversalement sur la face supérieure 81 du socle, au niveau de l'extrémité postérieure 74 de celui-ci.As shown in Figure 3, the coil housing 86 of the electromagnetic trip device 29 also has two parallel vertical sides 109, 110 formed from the spacer 89, in the rear extension of the two wings 87, 88 and connected transversely to their respective bases, by a vertical veil 112 intended to come to cooperate with an insulating heel 113 molded with the base 72 and disposed transversely on the upper face 81 of the base, at the rear end 74 thereof.

La borne de raccordement électrique 27, figure 3, associée au sous-ensemble 30 est destinée à être logée entre les deux flancs 109, 110 de la carcasse-bobine 86. Cette borne 27, en l'occurrence du type vis - étrier, est reliée à une pièce conductrice 115, mieux visible à la figure 3, comprenant une première branche plane 116 pourvue d'un trou central fileté 117 destiné à recevoir la borne 27 et de deux saillies latérales, dont une seule est visible en 118 sur la figure 3, destinées à coopérer avec deux lumières 119, 120 ménagées respectivement dans les deux flancs 109, 110 de la carcasse-bobine. Cette première branche 116 de la pièce conductrice 115 se poursuit par l'intermédiaire d'un coude à 90°, par une seconde branche 122 destinée à longer la bobine 91 (voir figures 1 et 2) et se poursuivant par l'intermédiaire d'un nouveau coude à 90°, par une troisième branche 123 destinée à prendre partiellement appui sur l'extrémité supérieure du tube 90 (voir figures 1 et 2) et présentant une portion 124 pliée à 90°.The electrical connection terminal 27, FIG. 3, associated with the sub-assembly 30 is intended to be housed between the two sides 109, 110 of the coil carcass 86. This terminal 27, in this case of the screw-caliper type, is connected to a conductive part 115, better visible in FIG. 3, comprising a first flat branch 116 provided with a threaded central hole 117 intended to receive the terminal 27 and with two lateral projections, only one of which is visible at 118 in the figure 3, intended to cooperate with two openings 119, 120 formed respectively in the two sides 109, 110 of the coil-carcass. This first branch 116 of the conductive part 115 continues via a 90 ° bend, by a second branch 122 intended to go along the coil 91 (see FIGS. 1 and 2) and continuing through a new 90 ° bend, by a third branch 123 intended to bear partially on the upper end of the tube 90 (see FIGS. 1 and 2) and having a portion 124 folded at 90 °.

Lors de l'assemblage du déclencheur électromagnétique à percuteur 29, en association avec la borne de raccordement 27, figure 3, la bobine 91 est montée autour du tube 90 de la carcasse-bobine 86 et le noyau plongeur 93 est introduit dans ledit tube 90 et est attelé par sa queue 95 au levier percuteur 41, lequel est alors monté pivotant sur les deux ailes 87, 88 de la carcasse-bobine. Le ressort de rappel 94 et le noyau fixe 92 sont ensuite introduits dans le tube 90 ; la pièce conductrice 115 associée à la borne de raccordement 27 est rendue solidaire de la carcasse-bobine 86 par engagement des deux saillies 118 dans les deux lumières 119, 120 des flancs respectifs 109, 110 de la carcasse-bobine, l'extrémité 91a de la bobine 91 venant en appui contre la portion 124 pliée à 90° de la pièce conductrice 115.During assembly of the electromagnetic trip device with striker 29, in association with the connection terminal 27, FIG. 3, the coil 91 is mounted around the tube 90 of the coil carcass 86 and the plunger core 93 is introduced into said tube 90 and is coupled by its tail 95 to the striker lever 41, which is then pivotally mounted on the two wings 87, 88 of the coil-carcass. The return spring 94 and the fixed core 92 are then introduced into the tube 90; the conductive part 115 associated with the connection terminal 27 is made integral with the coil carcass 86 by engagement of the two projections 118 in the two slots 119, 120 of the respective flanks 109, 110 of the coil carcass, the end 91a of the coil 91 coming to bear against the portion 124 folded at 90 ° to the conductive part 115.

La figure 4 montre cet assemblage du déclencheur électromagnétique à percuteur 29, en association avec la borne 27.FIG. 4 shows this assembly of the electromagnetic trip device with striker 29, in association with terminal 27.

Après montage de l'ensemble plaquette 59 - déclencheur thermique à bilame 28 sur le socle 72 et assemblage de l'ensemble déclencheur électromagnétique à percuteur 29 - borne 27, comme illustré à la figure 4, ledit ensemble déclencheur électromagnétique à percuteur 29 - borne 27 est alors monté sur le socle 72 par engagement, d'une part, des deux ailes 87, 88 de la carcasse-bobine 86 sur les deux rehausses 78, 79 et, d'autre part, du voile 112 de la carcasse-bobine 86 sur le talon 113, au moyen d'organes de fixation coopérants, tels que par exemple tenons et mortaises.After assembly of the plate assembly 59 - thermal bimetal trip unit 28 on the base 72 and assembly of the electromagnetic trip unit with striker 29 - terminal 27, as illustrated in FIG. 4, said electromagnetic trip unit with striker 29 - terminal 27 is then mounted on the base 72 by engagement, on the one hand, of the two wings 87, 88 of the coil carcass 86 on the two risers 78, 79 and, on the other hand, of the web 112 of the coil carcass 86 on the heel 113, by means of cooperating fasteners, such as for example tenons and mortises.

La figure 7 représente le sous-ensemble magnétothermique 30 une fois assemblé. A ce stade, les deux extrémités 91a et 91b de la bobine 91 ( figure 3 ) sont électriquement connectées, par exemple par soudage effectué en une seule opération, respectivement à la portion 124 de la pièce conductrice 115 et à la partie 70 de la plaquette 59 de support du bilame, comme le montrent les figures 1 et 2.FIG. 7 represents the magnetothermal sub-assembly 30 once assembled. At this stage, the two ends 91a and 91b of the coil 91 (FIG. 3) are electrically connected, for example by welding carried out in a single operation, respectively to the portion 124 of the part. conductive 115 and to the part 70 of the plate 59 for supporting the bimetallic strip, as shown in FIGS. 1 and 2.

Il convient de noter que la hauteur et l'emplacement du pion de fixation isolant 83, figure 3, sont tels qu'une fois le sous-ensemble 30 assemblé, l'extrémité de la queue 95 du noyau plongeur 93 en position de repos soit en appui sur le pion 83, comme visible à la figure 11.It should be noted that the height and the location of the insulating fixing pin 83, FIG. 3, are such that once the sub-assembly 30 is assembled, the end of the tail 95 of the plunger core 93 in the rest position is resting on pin 83, as shown in Figure 11.

Comme le montre la figure 7, le sous-ensemble 30 étant assemblé, le bilame 55 et le tube 90 logeant le circuit magnétique du déclencheur électromagnétique 29 sont parallèles coplanaires, tandis que le bras de percussion 96 du levier pivotant 41 s'étend latéralement à l'une des grandes faces du bilame 55 afin de ne pas être gêné par ce dernier ; en position de repos, figure 7, le bras de percussion 96 est par ailleurs situé sensiblement au niveau du pied du bilame 55 en s'étendant au-delà de l'extrémité antérieure 73 du socle 72.As shown in FIG. 7, the sub-assembly 30 being assembled, the bimetallic strip 55 and the tube 90 housing the magnetic circuit of the electromagnetic trip device 29 are parallel coplanar, while the percussion arm 96 of the pivoting lever 41 extends laterally to one of the large faces of the bimetallic strip 55 so as not to be hampered by the latter; in the rest position, FIG. 7, the percussion arm 96 is moreover situated substantially at the foot of the bimetallic strip 55, extending beyond the anterior end 73 of the base 72.

En référence aux figures 7 et 8, la face inférieure 128 du socle 72 est pourvue, au voisinage de son extrémité postérieure 74, de deux organes isolants conformés en crochets dont un seul est visible en 129 sur ces figures, entre lesquels est insérée une première branche terminale plane 130 (figure 8) de la pièce conductrice en forme de bras 23 tel qu'illustré à la figure 9 et portant, sur sa face inférieure 131 (figure 10), le contact fixe 21. L'extrémité antérieure 73 du socle 72 est bordée d'une traverse isolante 133 pourvue d'organes d'accrochage 134 (figure 8) coopérant avec des encoches 135 pratiquées dans une seconde branche terminale plane 136 du bras porte-contact fixe 23, opposée à la première et pliée à 90° (voir figures 8 et 9). De préférence, les deux crochets 129 et la traverse 133 viennent de moulage avec le socle 72.With reference to FIGS. 7 and 8, the lower face 128 of the base 72 is provided, in the vicinity of its rear end 74, with two insulating members shaped as hooks, only one of which is visible at 129 in these figures, between which a first is inserted. flat terminal branch 130 (FIG. 8) of the conductive part in the form of an arm 23 as illustrated in FIG. 9 and bearing, on its lower face 131 (FIG. 10), the fixed contact 21. The front end 73 of the base 72 is bordered by an insulating cross member 133 provided with hooking members 134 (FIG. 8) cooperating with notches 135 formed in a second flat end branch 136 of the fixed contact carrier arm 23, opposite the first and folded at 90 ° (see Figures 8 and 9). Preferably, the two hooks 129 and the cross-member 133 come from molding with the base 72.

Le bras porte-contact fixe 23 fait donc partie intégrante du sous-ensemble 30 comme illustré à la figure 8. Une fois le bras 23 solidarisé au sous-ensemble 30, figure 8, la branche 136 dudit bras 23 est connectée électriquement, par exemple par soudage, sur l'extrémité 64 de la chaufferette 61 du déclencheur thermique à bilame 28.The fixed contact support arm 23 therefore forms an integral part of the sub-assembly 30 as illustrated in FIG. 8. Once the arm 23 is secured to the sub-assembly 30, FIG. 8, the branch 136 of said arm 23 is electrically connected, for example by welding, on the end 64 of the heater 61 of the bimetal thermal trip device 28.

Sur la figure 8, on a représenté en 140 des nervures longitudinales de guidage venues de moulage et formées sur le socle 72 du sous-ensemble 30 ainsi que sur les ailes 87, 88 de la carcasse-bobine 86 ; ces nervures 140 sont prévues pour coulisser dans des rainures longitudinales 142 (figure 11) ménagées dans deux parois interpolaires 11a, 11b du boîtier 11 lors du montage du sous-ensemble magnétothermique 30 équipé du bras porte-contact fixe 23 dans le boîtier.In FIG. 8, there are shown at 140 longitudinal guide ribs coming from molding and formed on the base 72 of the sub-assembly 30 as well as on the wings 87, 88 of the coil-carcass 86; these ribs 140 are provided to slide in longitudinal grooves 142 (FIG. 11) formed in two interpolar walls 11a, 11b of the housing 11 during the mounting of the magnetothermal sub-assembly 30 equipped with the fixed contact carrier arm 23 in the housing.

Comme on le voit sur les figures 1 et 2, après montage du sous-ensemble 30 équipé du bras porte-contact fixe 23 à l'intérieur du boîtier 11, le socle 72 de ce sous-ensemble 30 s'étend longitudinalement dans une direction perpendiculaire au plan médian P.As seen in Figures 1 and 2, after mounting the sub-assembly 30 equipped with the fixed contact arm 23 inside the housing 11, the base 72 of this sub-assembly 30 extends longitudinally in a direction perpendicular to the median plane P.

A partir de la position de fermeture des contacts telle qu'illustrée à la figure 1, une surcharge électrique détectée par le bilame 55 provoque une déflexion de celui-ci qui actionne le pont de déclenchement 48, lequel entraîne un dispositif de commande, symbolisé par la flèche F, qui agit sur le crochet 33 pour le libérer de la réglette 38 ; par cette libération, le crochet 33 pivote en sens horaire et provoque le déclenchement de la serrure 31. L'organe d'ouverture 39 descend pour percuter le poussoir 45 qui entraîne le pont 17 et provoque l'ouverture des contacts.From the closed position of the contacts as illustrated in FIG. 1, an electrical overload detected by the bimetallic strip 55 causes it to deflect which actuates the trigger bridge 48, which drives a control device, symbolized by the arrow F, which acts on the hook 33 to release it from the strip 38; by this release, the hook 33 pivots clockwise and causes the lock 31 to fire. The opening member 39 descends to strike the pusher 45 which drives the bridge 17 and causes the contacts to open.

Dans le cas où un court-circuit est détecté par le déclencheur électromagnétique à percuteur 29, le noyau plongeur 93 (figure 1) se déplace par attraction vers le noyau fixe 92 et entraîne un pivotement du levier percuteur 41 qui lui est attelé. Au cours de son pivotement, le levier 41 entraîne la réglette 38 qui descend pour déclencher la serrure 31 par libération du crochet 33 vis-à-vis de la réglette, le crochet libéré 33 pivotant en sens horaire. Après déclenchement de la serrure 31 dont le temps de réponse est supérieur au temps de percussion du levier 41, ce dernier percute le poussoir 45 qui entraîne le pont 17 et provoque l'ouverture des contacts, cette ouverture étant confirmée par descente et application de l'organe d'ouverture 39 sur le poussoir 45 (figure 2). L'ensemble levier percuteur 41 - noyau plongeur 93 revient dans sa position de la figure 1 sous l'action du ressort de rappel 94, le retour du levier percuteur 41 entraînant la remontée de la réglette 38.In the case where a short circuit is detected by the electromagnetic trip device with striker 29, the plunger core 93 (FIG. 1) moves by attraction towards the fixed core 92 and causes the striker lever 41 which is coupled to it to pivot. During its pivoting, the lever 41 drives the slide 38 which descends to trigger the lock 31 by releasing the hook 33 vis-à-vis the slide, the released hook 33 pivoting clockwise. After triggering of the lock 31, the response time of which is greater than the time of percussion of the lever 41, the latter strikes the pusher 45 which drives the bridge 17 and causes the opening of the contacts, this opening being confirmed by descent and application of the 'opening member 39 on the pusher 45 (Figure 2). The striker lever 41 - plunger core 93 assembly returns to its position in FIG. 1 under the action of the return spring 94, the return of the striker lever 41 causing the strip 38 to rise.

Claims (8)

  1. Protection switch electrical device (10) comprising in a casing (11) :
    - at least one polar current path established between two electrical connection terminals (26, 27) and provided with at least one mobile contact support (18, 19) cooperating with a fixed contact (21) ;
    - for each polar path a magneto-thermal tripping subsystem (30) comprising :
    . a thermal tripping device (28) provided with a bimetal strip (55) mounted perpendicularly on a flat conductive support (59) at one end thereof, said bimetal strip (55) being electrically connected to the fixed contact (21) and being adapted to command the opening of the contacts in response to an overload current,
    . an electromagnetic tripping device (29) comprising :
    -- an insulative material coil-former (86) having a tube (90) around which is wound a control coil (91) and in which a mobile magnetic core (93) can slide in response to a short-circuit current in the polar current path ;
    -- a lever (41) commanded by the mobile core (93) to open the contacts in response to a short-circuit current,
    characterized in that :
    - the magneto-thermal subsystem (30) comprises an elongate insulative material base (72) having an anterior end (73) near the fixed contact (21) and accomodating fixedly and flat the support (59) carrying the bimetal strip (55) ; and
    - the lever (41) of the electromagnetic tripping device (29) is a striker for the mobile contact support, said striker lever (41) being pivotally mounted on the coil former (86) and extending laterally of the bimetal strip (55) beyond the anterior end (73) of the base (72), the bimetal strip support (59) and the coil former (86) being mounted in a mutually overlapping manner on the base (72).
  2. Switch electrical device according to claim 1,
    characterized in that the support (59) of the bimetal strip (55) and the coil-former (86) are respectively fixed to the base (72) by cooperating engagement means.
  3. Switch electrical device according to claim 1 or 2,
    characterized in that the two larger surfaces (55a, 55b) of the bimetal strip (55) lie in a plane parallel to the longitudinal direction of the support (59).
  4. Switch electrical device according to claim 3,
    characterized in that the striker lever (41) has coaxial pivots (101, 102) substantially level with the foot of the bimetal strip (55) and a member (98) coupling it to the mobile core near the upper surface (81) of the base (72).
  5. Switch electrical device according to any one of claims 1 to 4,
    characterized in that the coil-former (86) has two parallel anterior flanges (87, 88) each comprising a bearing (103, 104) for a pivot of the lever (41) and two parallel posterior flanges (109, 110) between which is accomodated an associated connecting terminal (27).
  6. Switch electrical device according to any one of the preceding claims,
    characterized in that the base (72) carries on its upper surface (81) a fixing peg (83) inserted in an aperture (84) in the bimetal strip support (59) such that the mobile core rests on said peg in the rest position.
  7. Switch electrical device according to any one of the preceding claims,
    characterized in that the base (72) comprises towards its lower surface (128) and towards its anterior end respective members (129, 134) for holding an arm (23) carrying the associated fixed contact (21).
  8. Switch electrical device according to any one of the preceding claims,
    characterized in that the base (72) of the magneto-thermal subsystem and/or the flanges (87, 88) of the coil-former (86) have guide ribs (140) adapted to slide in grooves (142) formed in the casing (11) when the magneto-thermal subsystem (30) is mounted in the casing.
EP92400239A 1991-02-28 1992-01-30 Protection circuit breaker having a thermo-magnetic sub-assembly Expired - Lifetime EP0501844B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102394 1991-02-28
FR9102394A FR2673487B1 (en) 1991-02-28 1991-02-28 PROTECTION SWITCH INCORPORATING A TRIGGERING MAGNETOTHERMAL SUB-ASSEMBLY.

Publications (2)

Publication Number Publication Date
EP0501844A1 EP0501844A1 (en) 1992-09-02
EP0501844B1 true EP0501844B1 (en) 1996-02-28

Family

ID=9410193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400239A Expired - Lifetime EP0501844B1 (en) 1991-02-28 1992-01-30 Protection circuit breaker having a thermo-magnetic sub-assembly

Country Status (5)

Country Link
EP (1) EP0501844B1 (en)
JP (1) JPH0652782A (en)
KR (1) KR950013424B1 (en)
DE (1) DE69208488T2 (en)
FR (1) FR2673487B1 (en)

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DE19935662A1 (en) * 1999-07-29 2001-02-01 Abb Patent Gmbh Electromagnetic release
DE10002773A1 (en) * 2000-01-22 2001-07-26 Abb Patent Gmbh Safety switch for protecting motor, has circuit breaker and fixed contact piece fastened on strap extension of yoke of circuit breaker
DE102010005345A1 (en) 2010-01-21 2011-07-28 Abb Ag, 68309 Electric switch device, has middle component having wiring column and magnetic and heat tripping device, and locking mechanism standard component that is fixed on middle component and carries operator
DE202015100926U1 (en) 2015-02-26 2015-03-10 Abb Technology Ag Electrical switching device in modular design

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US5578662A (en) 1994-07-22 1996-11-26 United States Surgical Corporation Bioabsorbable branched polymers containing units derived from dioxanone and medical/surgical devices manufactured therefrom
ES2147158B1 (en) * 1998-12-30 2001-03-01 Power Controls Iberica Sl IMPROVEMENTS IN AUTOMATIC GROUND EXHAUST CIRCUITS.
JP2000340093A (en) * 1999-05-25 2000-12-08 Fuji Electric Co Ltd Overcurrent trip device for circuit breaker
DE19952179A1 (en) * 1999-10-29 2001-05-03 Moeller Gmbh Electrical protection switching device
US6621020B2 (en) * 2000-10-25 2003-09-16 Fuji Electric Co., Ltd. Breaking mechanism for circuit breaker
JP4186414B2 (en) * 2000-11-29 2008-11-26 富士電機機器制御株式会社 Instantaneous trip circuit breaker
EP1251541B1 (en) * 2001-04-21 2006-10-18 ABB PATENT GmbH Motor protection switch
JP2005339997A (en) * 2004-05-27 2005-12-08 Mitsubishi Electric Corp Overcurrent tripping device of circuit breaker
JP4492247B2 (en) 2004-08-03 2010-06-30 ブラザー工業株式会社 Embroiderable sewing machine
DE102006055007A1 (en) * 2006-11-22 2008-05-29 Abb Ag Installation switching device with a double break
CN100464387C (en) * 2006-12-15 2009-02-25 大全集团有限公司 Break tripping device
DE102008012149A1 (en) * 2008-03-01 2009-09-03 Abb Ag switchgear
DE102008016036A1 (en) * 2008-03-28 2009-10-01 Abb Ag Installation switching device with a double break
KR101015333B1 (en) * 2008-12-31 2011-02-16 엘에스산전 주식회사 Molded case circuit breaker
FR2958447B1 (en) * 2010-04-02 2012-05-04 Schneider Electric Ind Sas ELECTROMAGNETIC TRIGGER FOR ELECTRICAL APPARATUS SWITCH, ELECTRICAL APPARATUS SWITCH COMPRISING SUCH A TRIGGER
FR2962255B1 (en) * 2010-07-02 2012-07-13 Schneider Electric Ind Sas ELECTROMAGNETIC TRIGGER FOR ELECTRICAL DEVICE SWITCH, ELECTRICAL DEVICE SWITCH COMPRISING SUCH A TRIGGER.
EP2544207B1 (en) 2011-07-05 2017-03-29 Siemens Aktiengesellschaft Short circuit trigger with optimised coil connection
DE102011078634A1 (en) 2011-07-05 2013-01-10 Siemens Aktiengesellschaft Overload release, especially for a circuit breaker

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US3162739A (en) * 1962-06-25 1964-12-22 Gen Electric Electric circuit breaker with improved trip means
FR2516304A1 (en) * 1981-11-09 1983-05-13 Telemecanique Electrique MECHANICAL CONTROL SWITCH AND AUTOMATIC OPENING
FR2611082B1 (en) * 1987-02-13 1993-05-28 Telemecanique Electrique PROTECTIVE SWITCHING DEVICE WITH REMOTE OPENING AND CLOSING

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935662A1 (en) * 1999-07-29 2001-02-01 Abb Patent Gmbh Electromagnetic release
DE10002773A1 (en) * 2000-01-22 2001-07-26 Abb Patent Gmbh Safety switch for protecting motor, has circuit breaker and fixed contact piece fastened on strap extension of yoke of circuit breaker
DE10002773B4 (en) * 2000-01-22 2005-12-15 Abb Patent Gmbh Motor protection switch
DE102010005345A1 (en) 2010-01-21 2011-07-28 Abb Ag, 68309 Electric switch device, has middle component having wiring column and magnetic and heat tripping device, and locking mechanism standard component that is fixed on middle component and carries operator
DE202015100926U1 (en) 2015-02-26 2015-03-10 Abb Technology Ag Electrical switching device in modular design

Also Published As

Publication number Publication date
DE69208488D1 (en) 1996-04-04
KR950013424B1 (en) 1995-11-08
DE69208488T2 (en) 1996-07-11
KR920017152A (en) 1992-09-26
JPH0652782A (en) 1994-02-25
FR2673487A1 (en) 1992-09-04
EP0501844A1 (en) 1992-09-02
FR2673487B1 (en) 1993-10-29

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