EP0337900B1 - High sensitivity electromagnetic tripper - Google Patents

High sensitivity electromagnetic tripper Download PDF

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Publication number
EP0337900B1
EP0337900B1 EP89420102A EP89420102A EP0337900B1 EP 0337900 B1 EP0337900 B1 EP 0337900B1 EP 89420102 A EP89420102 A EP 89420102A EP 89420102 A EP89420102 A EP 89420102A EP 0337900 B1 EP0337900 B1 EP 0337900B1
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EP
European Patent Office
Prior art keywords
base
trip device
armature
cover
electromagnetic trip
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
EP89420102A
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German (de)
French (fr)
Other versions
EP0337900A1 (en
Inventor
Michel Bonniau
Marc Paupert
Régis Renel
Alain Karczewski
Jacques Vallot
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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Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0337900A1 publication Critical patent/EP0337900A1/en
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Publication of EP0337900B1 publication Critical patent/EP0337900B1/en
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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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/325—Housings, assembly or disposition of different elements in the housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • 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
    • H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques

Definitions

  • the invention relates to an electromagnetic trip device with magnetic latching, in particular for a differential switch or circuit breaker, having an insulating housing consisting of a base and an open bottom cover snapping onto the base to form a closed housing. , inside which are housed a U-shaped frame, the ends of the two legs of which constitute two co-planar pole surfaces, a pivoting pallet on the end of one of said two legs of the frame and coming in the armed position of the trigger sticking to said two pole surfaces to close the magnetic circuit formed by the armature and the paddle, a permanent magnet for polarizing the magnetic circuit and a trigger coil surrounding the other of said two legs of the armature and having a carcass with lower face attached to the base of the frame and snapped onto the base.
  • the documents FR-A-2,095,278 and DE-A-3,631,405 describe a trigger of the kind mentioned, in which the elements of the trigger are housed in a housing constituted by a base and a cover snapped onto the base. On one of the legs of the frame is threaded the carcass of the coil and on the other a fixing piece which in combination with the carcass is snapped onto the base. The base of the frame is interposed between the carcass and a permanent magnet housed in a recess in the base.
  • an elastic washer is also interposed between the magnet and the bottom of the recess, the armature being thus resiliently held in the housing. This fixation is complicated.
  • the manufacture and mounting of very high sensitivity electromagnetic trip devices of the kind mentioned must be particularly careful in order to obtain high trigger accuracy.
  • the object of the present invention is to produce a simplified trip device the mounting of which is easier and is likely to be partially or entirely automated.
  • the electromagnetic trip device according to the invention comprises the elements set out in claim 1.
  • the trigger elements are fixed on the one hand by the snap-fastening of the coil carcass on the base and on the other hand by the support of the cover on this carcass. Locking by the cover ensures proper fixing and positioning of the trigger elements inside the housing.
  • This fixing is effected by simple snaps which can be carried out by automatic assembly machines.
  • the cover has a generally parallelepiped shape with means for fixing the trigger.
  • One of the fixing means is constituted by a beveled angle of the upper face allowing to remain on the edges, two perforated ears allowing the passage of a fixing axis.
  • the two angles are preferably bevelled for fixing by the two edges of the upper face of the cover.
  • the cover advantageously has additional fixing means constituted by lugs carried by the small side faces in a manner well known to specialists.
  • the two large side faces of the cover may have steps for fixing by snap-fastening to secure the trigger to a support carrying snap-on spouts.
  • a return spring of the pallet is anchored at one of its ends by an adjustment screw screwed into the turns of the spring.
  • the screw performs the dual function of holding and adjusting the spring return force.
  • the head of the adjustment screw is supported on a lug secured to the frame of the trigger by inserting into a notch formed in this lug.
  • the relay boxes with very high sensitivity must be dust-tight and according to a development of the invention, the snap-fit lugs of the base on the cover are shaped to close the openings in which these lugs engage.
  • the orifices are advantageously circular in shape and the ends of the spouts are in the form of cylindrical pins snapping into these orifices.
  • the permanent magnet for biasing the armature is disposed between the legs of this armature and is held by the carcass of the coil which for this purpose has extensions provided with cutouts through which the permanent magnet passes.
  • the assembly is particularly simple and the assembly is carried out by simple stacking and latching of the parts one on the other.
  • the cover and the base are advantageously made of plastic material loaded with magnetic particles, in particular iron, to form a magnetic screen against external disturbances.
  • This magnetic protection can be reinforced or produced by an external magnetic screen, which fits, for example, on the cover and the base.
  • the magnetic circuit of a high-sensitivity electromagnetic trip device consists of a U-shaped frame 10 and a pivoting pallet 12.
  • the pallet 12 is articulated on the end of one of the legs 14, 16 of the frame 10 and in the armed position of the trigger, the pallet 12 is applied to the ends of the legs 14, 16 constituting two polar surfaces.
  • On the branch 16 of the frame 10 is threaded a carcass 18 of a coil 20.
  • a permanent magnet 22 for biasing the frame 10 is interposed between the legs 14, 16 to maintain the pallet 12 in the position attracted to the against the restoring force of a coil spring 24.
  • the assembly is housed inside a housing constituted by a base 26 and a cover 28 covering the base 26. The upper face of the cover 28 is crossed by a control pin 30 bearing on the pallet 12.
  • Such a trigger is well known and it suffices to recall that the release of the pallet is caused by an excitation of the coil 20 canceling the attraction of the pallet 12 by the permanent magnet 22.
  • the coil 20 is surrounded by lower 32 and upper 34 flanges (faces) of the carcass 18, these flanges (faces) being extended to form support elements for the permanent magnet 22 which passes through orifices 36, 38, formed in the extensions of these flanges 32, 34.
  • the underside of the flange 32 is supported on the base of the frame 10 and has two slots 46, 48 in which engage snap-fit spouts 42, 44 carried by the base 26 In the latched position, the carcass 18 maintains the base of the frame 10 in abutment on the base 26 and positions the permanent magnet 22.
  • the cover 28 fits on the base 26 by snapping onto four spouts 50 provided at the four corners of the rectangular base.
  • the upper face of the base 28 carries internal bosses 52 which come to bear on the upper face of the upper flange 34 of the carcass 18 in the snap-on position of the cover, in order to lock this carcass on the base 26.
  • the carcass 18 also carries pins centering 54 engaging in conjugate holes in the base 26.
  • the return spring 24 is a coil tension spring, one end 56 of which is anchored to the pallet 12 and the other end 58 of which is anchored by an adjustment screw 60 to a lug 62 secured to the frame 10
  • the screw 60 is engaged in a notch 64 of the tab 62, the head 66 of the screw 60 resting on the edges of this notch 64 and the threaded part of the screw 60 both screwed into the turns of the spring 24.
  • the adjustment is effected by a rotation of the head 66 causing the threaded part of the screw 60 to penetrate into the spring 24.
  • the base 26 has, opposite the head 66, an orifice 68 for access to the screw 60.
  • the cover 28 of generally parallelepiped shape has on its two small side faces 70, 72 of the fixing lugs perforated 74, 76, allowing the trigger to be supported and fixed by screws passing through the legs 74, 76.
  • the upper corners of the small lateral faces 70, 72 have bevels (heels) 78, 80 which allow lateral extensions to remain.
  • the cover 28 comprises a third fixing means constituted by conjugate steps of the bosses 52.
  • the ends of the snap-fit spouts 50 carried by the base 26 have a rounded shape engaging and closing off circular orifices provided in the cover 28. This shape of the latching spouts contributes to the sealing of the housing by limiting the penetration of dust or other impurities.
  • the base 26 carries two pins 87 to which the wires of the coil 20 are welded.
  • the mounting of the trigger according to the invention is particularly simple.
  • This assembly is secured to the base 26 by simple snap-fitting of the spouts 42, 44, into the slots 46, 48 taking care to correctly position the centering pins 54.
  • This snap-fastening fixes the elements of the trigger to the rigid base 26 while allowing access to the adjustment screw 66 through the orifice 68 of the base.
  • the cover 28 is fitted and snapped onto the base 26 and the bosses 52 come to bear on the carcass 18 to lock the latter.
  • the housing can be fixed to a support, for example to a differential circuit breaker, either by the lateral fixing lugs 74, 76, or by the axes passing through the perforated ears 82, 84, or by a snap-fastening on the steps opposite the bosses 52
  • the different means of fixing the housing can be used separately or in combination.
  • the adjustment of the return force of the spring 24 by a simple rotation of the screw 60 ensures a great precision of adjustment while avoiding any untimely rotation of the screw 60 thanks to the self-tightening effect of the turns of the spring on the screw thread.

Abstract

The casing of a very-high-sensitivity electromagnetic tripper consists of a support base (26) on which a cap (28) snap-fits. The elements of the tripper are fixed to the base (26) by snap-fitting the frame (18) for the coil (20), this snap-fitting applying the armature (10) to the base (26). Bosses (52) of the cap (28) lock the frame (18) when the cap is positioned. Adjustment of the return force of the vane (12) is carried out with a screw (60) engaging with the turns of the spiral return spring (24). <IMAGE>

Description

L'invention est relative à un déclencheur électromagnétique à accrochage magnétique, notamment pour un interrupteur ou disjoncteur différentiel, ayant un boîtier isolant constitué d'un socle et d'un capot à fond ouvert venant s'encliqueter sur le socle pour former un boîtier fermé, à l'intérieur duquel sont logés une armature en forme de U, dont les extrémités des deux jambes constituent deux surfaces polaires coplanaires, une palette pivotante sur l'extrémité de l'une desdites deux jambes de l'armature et venant en position armée du déclencheur se coller sur lesdites deux surfaces polaires pour fermer le circuit magnétique constitué par l'armature et la palette, un aimant permanent de polarisation du circuit magnétique et une bobine de déclenchement entourant l'autre desdites deux jambes de l'armature et ayant une carcasse à face inférieure accolée à la base de l'armature et encliquetée sur le socle.The invention relates to an electromagnetic trip device with magnetic latching, in particular for a differential switch or circuit breaker, having an insulating housing consisting of a base and an open bottom cover snapping onto the base to form a closed housing. , inside which are housed a U-shaped frame, the ends of the two legs of which constitute two co-planar pole surfaces, a pivoting pallet on the end of one of said two legs of the frame and coming in the armed position of the trigger sticking to said two pole surfaces to close the magnetic circuit formed by the armature and the paddle, a permanent magnet for polarizing the magnetic circuit and a trigger coil surrounding the other of said two legs of the armature and having a carcass with lower face attached to the base of the frame and snapped onto the base.

Les documents FR-A-2.095.278 et DE-A-3.631.405 décrivent un déclencheur du genre mentionné, dans lequel les éléments du déclencheur sont logés dans un boîtier constitué par un socle et un capot encliqueté sur le socle. Sur l'une des jambes de l'armature est enfilée la carcasse de la bobine et sur l'autre une pièce de fixation qui en combinaison avec la carcasse est encliquetée sur le socle. La base de l'armature est intercalée entre la carcasse et un aimant permanent logé dans un évidement du socle. Dans le déclencheur du document FR-A-2.095.278, une rondelle élastique est en outre interposée entre l'aimant et le fond de l'évidement, l'armature étant ainsi élastiquement maintenue dans le boîtier. Cette fixation est compliquée.The documents FR-A-2,095,278 and DE-A-3,631,405 describe a trigger of the kind mentioned, in which the elements of the trigger are housed in a housing constituted by a base and a cover snapped onto the base. On one of the legs of the frame is threaded the carcass of the coil and on the other a fixing piece which in combination with the carcass is snapped onto the base. The base of the frame is interposed between the carcass and a permanent magnet housed in a recess in the base. In the trigger of document FR-A-2,095,278, an elastic washer is also interposed between the magnet and the bottom of the recess, the armature being thus resiliently held in the housing. This fixation is complicated.

La fabrication et le montage des déclencheurs électromagnétiques à très grande sensibilité du genre mentionné, doivent être particulièrement soignés pour obtenir une grande précision de déclenchement. La présente invention a pour but la réalisation d'un déclencheur simplifié dont le montage est plus facile et est susceptible d'être partiellement ou entièrement automatisé.The manufacture and mounting of very high sensitivity electromagnetic trip devices of the kind mentioned must be particularly careful in order to obtain high trigger accuracy. The object of the present invention is to produce a simplified trip device the mounting of which is easier and is likely to be partially or entirely automated.

Le déclencheur électromagnétique selon l'invention comprend les éléments énoncés dans la revendication 1.The electromagnetic trip device according to the invention comprises the elements set out in claim 1.

Les éléments du déclencheur sont fixés d'une part par l'encliquetage de la carcasse de la bobine sur le socle et d'autre part par l'appui du capot sur cette carcasse. Le verrouillage par le capot assure une fixation et un positionnement correct des éléments du déclencheur à l'intérieur du boîtier. Cette fixation s'opère par de simples encliquetages pouvant être réalisés par des machines automatiques de montage. Le capot présente une forme générale parallélépipédique dotée de moyens de fixation du déclencheur. L'un des moyens de fixation est constitué par un angle biseauté de la face supérieure laissant subsister sur les bords, deux oreilles perforées permettant le passage d'un axe de fixation. Les deux angles sont de préférence biseautés pour une fixation par les deux bords de la face supérieure du capot. Le capot présente avantageusement des moyens additionnels de fixation constitués par des pattes portées par les petites faces latérales d'une manière bien connue des spécialistes. Les deux grandes faces latérales du capot peuvent présenter des redans de fixation par encliquetage pour solidariser le déclencheur à un support portant des becs d'encliquetage.The trigger elements are fixed on the one hand by the snap-fastening of the coil carcass on the base and on the other hand by the support of the cover on this carcass. Locking by the cover ensures proper fixing and positioning of the trigger elements inside the housing. This fixing is effected by simple snaps which can be carried out by automatic assembly machines. The cover has a generally parallelepiped shape with means for fixing the trigger. One of the fixing means is constituted by a beveled angle of the upper face allowing to remain on the edges, two perforated ears allowing the passage of a fixing axis. The two angles are preferably bevelled for fixing by the two edges of the upper face of the cover. The cover advantageously has additional fixing means constituted by lugs carried by the small side faces in a manner well known to specialists. The two large side faces of the cover may have steps for fixing by snap-fastening to secure the trigger to a support carrying snap-on spouts.

Selon une particularité importante de l'invention, un ressort de rappel de la palette est ancré à l'une de ses extrémités par une vis de réglage vissée dans les spires du ressort. La vis assure la double fonction de maintien et de réglage de la force de rappel du ressort. La tête de la vis de réglage prend appui sur une patte solidaire de l'armature du déclencheur en s'insérant dans une encoche ménagée dans cette patte. Les boîtiers des relais à très haute sensibilité doivent être étanches à la poussière et selon un développement de l'invention, les becs d'encliquetage du socle sur le capot sont conformés pour obturer les orifices dans lesquels ces becs s'engagent. Les orifices sont avantageusement de forme circulaire et les extrémités des becs sont en forme de pions cylindriques s'encliquetant dans ces orifices.According to an important feature of the invention, a return spring of the pallet is anchored at one of its ends by an adjustment screw screwed into the turns of the spring. The screw performs the dual function of holding and adjusting the spring return force. The head of the adjustment screw is supported on a lug secured to the frame of the trigger by inserting into a notch formed in this lug. The relay boxes with very high sensitivity must be dust-tight and according to a development of the invention, the snap-fit lugs of the base on the cover are shaped to close the openings in which these lugs engage. The orifices are advantageously circular in shape and the ends of the spouts are in the form of cylindrical pins snapping into these orifices.

L'aimant permanent de polarisation de l'armature est disposé entre les jambes de cette armature et il est maintenu par la carcasse de la bobine qui comporte à cet effet des extensions munies de découpes traversées par l'aimant permanent.The permanent magnet for biasing the armature is disposed between the legs of this armature and is held by the carcass of the coil which for this purpose has extensions provided with cutouts through which the permanent magnet passes.

L'ensemble est particulièrement simple et le montage s'effectue par simple empilage et encliquetage des pièces les unes sur les autres.The assembly is particularly simple and the assembly is carried out by simple stacking and latching of the parts one on the other.

Le capot et le socle sont avantageusement réalisés en matière plastique chargée de particules magnétiques notamment de fer, pour constituer un écran magnétique contre les perturbations externes. Cette protection magnétique peut être renforcée ou réalisée par un écran magnétique externe, qui s'emboîte par exemple sur le capot et le socle.The cover and the base are advantageously made of plastic material loaded with magnetic particles, in particular iron, to form a magnetic screen against external disturbances. This magnetic protection can be reinforced or produced by an external magnetic screen, which fits, for example, on the cover and the base.

D'autres avantages ou caractéristiques ressortiront plus clairement de la description 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 schématique en coupe suivant la ligne I.I de la figure 2 d'un déclencheur selon l'invention;
  • la figure 2 est une coupe suivant la ligne II.II de la figure 1;
  • la figure 3 est une coupe partielle suivant la ligne III.III de la figure 2.
Other advantages or characteristics will emerge more clearly from the description which follows, of an embodiment of the invention given by way of nonlimiting example and represented in the appended drawings in which:
  • Figure 1 is a schematic sectional view along line II of Figure 2 of a trip device according to the invention;
  • Figure 2 is a section along line II.II of Figure 1;
  • Figure 3 is a partial section along line III.III of Figure 2.

Sur les figures, le circuit magnétique d'un déclencheur électromagnétique à haute sensibilité, est constitué par une armature 10 en forme de U et une palette pivotante 12. La palette 12 est articulée sur l'extrémité de l'une 14 des jambes 14, 16 de l'armature 10 et en position armée du déclencheur, la palette 12 vient s'appliquer sur les extrémités des jambes 14, 16 constituant deux surfaces polaires. Sur la branche 16 de l'armature 10 est enfilée une carcasse 18 d'une bobine 20. Un aimant permanent 22 de polarisation de l'armature 10, est intercalé entre les jambes 14, 16 pour maintenir la palette 12 en position attirée à l'encontre de la force de rappel d'un ressort à boudin 24. L'ensemble est logé à l'intérieur d'un boîtier constitué par un socle 26 et un capot 28 coiffant le socle 26. La face supérieure du capot 28 est traversée par un pion de commande 30 venant en appui sur la palette 12. Un tel déclencheur est bien connu et il suffit de rappeler que la libération de la palette est provoquée par une excitation de la bobine 20 annulant l'attraction de la palette 12 par l'aimant permanent 22.In the figures, the magnetic circuit of a high-sensitivity electromagnetic trip device consists of a U-shaped frame 10 and a pivoting pallet 12. The pallet 12 is articulated on the end of one of the legs 14, 16 of the frame 10 and in the armed position of the trigger, the pallet 12 is applied to the ends of the legs 14, 16 constituting two polar surfaces. On the branch 16 of the frame 10 is threaded a carcass 18 of a coil 20. A permanent magnet 22 for biasing the frame 10 is interposed between the legs 14, 16 to maintain the pallet 12 in the position attracted to the against the restoring force of a coil spring 24. The assembly is housed inside a housing constituted by a base 26 and a cover 28 covering the base 26. The upper face of the cover 28 is crossed by a control pin 30 bearing on the pallet 12. Such a trigger is well known and it suffices to recall that the release of the pallet is caused by an excitation of the coil 20 canceling the attraction of the pallet 12 by the permanent magnet 22.

La bobine 20 est encadrée par des flasques (faces) inférieur 32 et supérieur 34 de la carcasse 18, ces flasques (faces) étant prolongés pour constituer des éléments de support de l'aimant permanent 22 qui traverse des orifices 36, 38, ménagés dans les prolongements de ces flasques 32, 34. La face inférieure du flasque 32 prend appui sur la base de l'armature 10 et présente deux fentes 46, 48 dans lesquelles s'engagent des becs d'encliquetage 42, 44 portés par le socle 26. En position encliquetée, la carcasse 18 maintient la base de l'armature 10 en appui sur le socle 26 et positionne l'aimant permanent 22. Le capot 28 s'emboîte sur le socle 26 en venant s'encliqueter sur quatre becs 50 ménagés aux quatre angles du socle rectangulaire. La face supérieure du socle 28 porte des bossages internes 52 qui viennent en appui sur la face supérieure du flasque supérieur 34 de la carcasse 18 en position encliquetée du capot, pour verrouiller cette carcasse sur le socle 26. La carcasse 18 porte de plus des pions de centrage 54 s'engageant dans des orifices conjugés du socle 26.The coil 20 is surrounded by lower 32 and upper 34 flanges (faces) of the carcass 18, these flanges (faces) being extended to form support elements for the permanent magnet 22 which passes through orifices 36, 38, formed in the extensions of these flanges 32, 34. The underside of the flange 32 is supported on the base of the frame 10 and has two slots 46, 48 in which engage snap-fit spouts 42, 44 carried by the base 26 In the latched position, the carcass 18 maintains the base of the frame 10 in abutment on the base 26 and positions the permanent magnet 22. The cover 28 fits on the base 26 by snapping onto four spouts 50 provided at the four corners of the rectangular base. The upper face of the base 28 carries internal bosses 52 which come to bear on the upper face of the upper flange 34 of the carcass 18 in the snap-on position of the cover, in order to lock this carcass on the base 26. The carcass 18 also carries pins centering 54 engaging in conjugate holes in the base 26.

Le ressort de rappel 24 est un ressort de traction à boudin dont l'une des extrémités 56 est ancrée à la palette 12 et dont l'autre extrémité 58 est ancrée par une vis de réglage 60 à une patte 62 solidaire de l'armature 10. La vis 60 est engagée dans une encoche 64 de la patte 62, la tête 66 de la vis 60 prenant appui sur les bords de cette encoche 64 et la partie filetée de la vis 60 tant vissée dans les spires du ressort 24. Le réglage est effectué par une rotation de la tête 66 provoquant la pénétration de la partie filetée de la vis 60 dans le ressort 24. Le socle 26 présente en regard de la tête 66 un orifice 68 d'accès à la vis 60.The return spring 24 is a coil tension spring, one end 56 of which is anchored to the pallet 12 and the other end 58 of which is anchored by an adjustment screw 60 to a lug 62 secured to the frame 10 The screw 60 is engaged in a notch 64 of the tab 62, the head 66 of the screw 60 resting on the edges of this notch 64 and the threaded part of the screw 60 both screwed into the turns of the spring 24. The adjustment is effected by a rotation of the head 66 causing the threaded part of the screw 60 to penetrate into the spring 24. The base 26 has, opposite the head 66, an orifice 68 for access to the screw 60.

Le capot 28 de forme générale parallélépipédique présente sur ses deux petites faces latérales 70, 72 des pattes de fixation perforées 74, 76, permettant le support du déclencheur et la fixation par des vis traversant les pattes 74, 76. Les angles supérieurs des petites faces latérales 70, 72, présentent des biseaux (talons) 78, 80 qui laissent subsister des extensions latérales en forme d'oreilles 82, 84 perforées de trous 86 permettant le passage d'un axe de fixation (non représenté). Le capot 28 comporte un troisième moyen de fixation constitué par des redans conjugués des bossages 52. Les extrémités des becs d'encliquetage 50 portés par le socle 26, ont une forme arrondie s'engageant et obturant des orifices circulaires ménagés dans le capot 28. Cette forme des becs d'encliquetage contribue à l'étanchéité du boîtier en limitant les pénétrations de poussière ou d'autres impuretés. Le socle 26 porte deux picots 87 auxquels sont soudés les fils de la bobine 20.The cover 28 of generally parallelepiped shape has on its two small side faces 70, 72 of the fixing lugs perforated 74, 76, allowing the trigger to be supported and fixed by screws passing through the legs 74, 76. The upper corners of the small lateral faces 70, 72 have bevels (heels) 78, 80 which allow lateral extensions to remain. ear shape 82, 84 perforated with holes 86 allowing the passage of a fixing pin (not shown). The cover 28 comprises a third fixing means constituted by conjugate steps of the bosses 52. The ends of the snap-fit spouts 50 carried by the base 26 have a rounded shape engaging and closing off circular orifices provided in the cover 28. This shape of the latching spouts contributes to the sealing of the housing by limiting the penetration of dust or other impurities. The base 26 carries two pins 87 to which the wires of the coil 20 are welded.

Le montage du déclencheur selon l'invention est particulièrement simple. Le sous-ensemble constitué par la bobine 20 avec sa carcasse 18 et l'aimant permanent 22, sont enfilés sur la branche 16 de l'armature 10 et la palette 12 avec son ressort de rappel 24, sont montés sur la branche opposée 14 de l'armature 10. Cet ensemble est solidarisé au socle 26 par simple encliquetage des becs 42, 44, dans les fentes 46,48 en prenant soin de positionner correctement les pions de centrage 54. Cet encliquetage fixe les élements du déclencheur au socle rigide 26 tout en permettant l'accès de la vis de réglage 66 à travers l'orifice 68 du socle. Par la suite le capot 28 est emboîté et encliqueté sur le socle 26 et les bossages 52 viennent en appui de la carcasse 18 pour verrouiller cette dernière. Le boîtier peut être fixé à un support, par exemple à un disjoncteur différentiel, soit par les pattes de fixation latérales 74, 76, soit par les axes traversant les oreilles perforées 82, 84, soit par un encliquetage sur les redans opposés aux bossages 52. Les différents moyens de fixation du boîtier peuvent être utilisés séparément ou en combinaison. Le réglage de la force de rappel du ressort 24 par une simple rotation de la vis 60 assure une grande précision de réglage tout en évitant toute rotation intempestive de la vis 60 gràce à l'effet d'autoserrage des spires du ressort sur le filetage de la vis.The mounting of the trigger according to the invention is particularly simple. The sub-assembly constituted by the coil 20 with its carcass 18 and the permanent magnet 22, are threaded on the branch 16 of the frame 10 and the pallet 12 with its return spring 24, are mounted on the opposite branch 14 of the frame 10. This assembly is secured to the base 26 by simple snap-fitting of the spouts 42, 44, into the slots 46, 48 taking care to correctly position the centering pins 54. This snap-fastening fixes the elements of the trigger to the rigid base 26 while allowing access to the adjustment screw 66 through the orifice 68 of the base. Subsequently the cover 28 is fitted and snapped onto the base 26 and the bosses 52 come to bear on the carcass 18 to lock the latter. The housing can be fixed to a support, for example to a differential circuit breaker, either by the lateral fixing lugs 74, 76, or by the axes passing through the perforated ears 82, 84, or by a snap-fastening on the steps opposite the bosses 52 The different means of fixing the housing can be used separately or in combination. The adjustment of the return force of the spring 24 by a simple rotation of the screw 60 ensures a great precision of adjustment while avoiding any untimely rotation of the screw 60 thanks to the self-tightening effect of the turns of the spring on the screw thread.

L'invention est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit.The invention is of course in no way limited to the embodiment more particularly described.

Claims (10)

  1. An electromagnetic trip device with magnetic latching, notably for an earth leakage switch or circuit breaker, having an insulating case formed by a base (26) and a cover (28) with an open bottom which clips onto the base (26) to form a closed case, inside which there are housed a U-shaped armature (10), the ends of the two legs (14, 16) of which constitute two coplanar polar surfaces, a blade (12) pivoting on the end of one (14) of said two legs (14, 16) of the armature (10) and pressing in the set position of the trip device against said two polar surfaces to close the magnetic circuit formed by the armature (10) and blade (12), a permanent magnet (22) for polarization of the magnetic circuit and a trip coil (20) surrounding the other (16) of said two legs (14, 16) of the armature (10) and having a shell (18) with a bottom face (32) adjoining the base of the armature (10) and clipped onto the base (26), characterized in that the base of the armature (10) is wedged between the bottom face of the shell (18) and the base (26) and is thus held pressed against this base (26), that the cover (28) has bosses (52) pressing against the upper face (34) of the shell (18) when the cover is fitted to position and lock the armature (10) and shell (18) inside the case, and that the permanent magnet (22) is located between the legs (14, 16) of the armature (10) and is held by extensions of said upper face (34) and lower face (32) of the shell (18) of the coil (20).
  2. The electromagnetic trip device according to claim 1, characterized in that said cover (28) of general parallelipipedic shape has on the face opposite from said open bottom a heel (78; 80) surrounded by two perforated lugs (82; 84) designed to be fitted onto a fixing spindle.
  3. The electromagnetic trip device according to claim 2, characterized in that the two corners of said opposite face each have a heel (78, 80) surrounded by lugs (82, 84).
  4. The electromagnetic trip device according to claim 1, 2 or 3, characterized in that the two small side faces (70, 72) of the cover (28) each have a fixing lug (74, 76) protruding out laterally from the case.
  5. The electromagnetic trip device according to claim 1, 2, 3 or 4, characterized in that the two large side faces of the cover (28) each have a cheek for fixing by clipping.
  6. The electromagnetic trip device according to any one of the foregoing claims, characterized in that the blade (12) is subjected to the action of a screw return spring (24) one of whose ends (56) is secured by an adjustment screw (60) screwed into the turns of the spring (24).
  7. The electromagnetic trip device according to claim 6, characterized in that the spring (24) extends between the blade (12) and the base (26), the adjustment screw (60) being accessible via an orifice (68) arranged in the base.
  8. The electromagnetic trip device according to claim 6 or 7, characterized in that the head (66) of the adjustment screw (60) is fitted into a notch (64) arranged in a lateral lug (62) securedly united to the armature (10) on which it bears.
  9. The electromagnetic trip device according to one of the foregoing claims, characterized in that the base (26) bears clipping tabs (50) cooperating with clipping orifices arranged in the cover (28) and that the ends of said tabs have a conjugate shape to that of the orifices to seal off the latter in the closed position of the case.
  10. The electromagnetic trip device according to any one of the foregoing claims, characterized in that the insulating case is made of plastic material charged with magnetic particles forming a magnetic shield.
EP89420102A 1988-04-14 1989-03-23 High sensitivity electromagnetic tripper Expired - Lifetime EP0337900B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805063 1988-04-14
FR8805063A FR2630256B1 (en) 1988-04-14 1988-04-14 HIGH SENSITIVITY ELECTROMAGNETIC TRIGGER

Publications (2)

Publication Number Publication Date
EP0337900A1 EP0337900A1 (en) 1989-10-18
EP0337900B1 true EP0337900B1 (en) 1994-06-01

Family

ID=9365375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420102A Expired - Lifetime EP0337900B1 (en) 1988-04-14 1989-03-23 High sensitivity electromagnetic tripper

Country Status (5)

Country Link
EP (1) EP0337900B1 (en)
AT (1) ATE106604T1 (en)
DE (1) DE68915607T2 (en)
ES (1) ES2057169T3 (en)
FR (1) FR2630256B1 (en)

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US6448522B1 (en) 2001-01-30 2002-09-10 General Electric Company Compact high speed motor operator for a circuit breaker
US6476337B2 (en) 2001-02-26 2002-11-05 General Electric Company Auxiliary switch actuation arrangement
US6678135B2 (en) 2001-09-12 2004-01-13 General Electric Company Module plug for an electronic trip unit
US6469882B1 (en) 2001-10-31 2002-10-22 General Electric Company Current transformer initial condition correction
US6804101B2 (en) 2001-11-06 2004-10-12 General Electric Company Digital rating plug for electronic trip unit in circuit breakers

Also Published As

Publication number Publication date
DE68915607D1 (en) 1994-07-07
ES2057169T3 (en) 1994-10-16
FR2630256B1 (en) 1995-06-23
EP0337900A1 (en) 1989-10-18
FR2630256A1 (en) 1989-10-20
ATE106604T1 (en) 1994-06-15
DE68915607T2 (en) 1994-10-20

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