EP0619591B1 - Magnetothermal trip unit - Google Patents

Magnetothermal trip unit Download PDF

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Publication number
EP0619591B1
EP0619591B1 EP19940410019 EP94410019A EP0619591B1 EP 0619591 B1 EP0619591 B1 EP 0619591B1 EP 19940410019 EP19940410019 EP 19940410019 EP 94410019 A EP94410019 A EP 94410019A EP 0619591 B1 EP0619591 B1 EP 0619591B1
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EP
European Patent Office
Prior art keywords
yoke
module
bimetal strip
adjustment screw
blade
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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
EP19940410019
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German (de)
French (fr)
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EP0619591A1 (en
Inventor
Jean-Luc Payet-Burin
Gilbert Garnier
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Schneider Electric SE
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Schneider Electric SE
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Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0619591A1 publication Critical patent/EP0619591A1/en
Application granted granted Critical
Publication of EP0619591B1 publication Critical patent/EP0619591B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • 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
    • H01H71/405—Combined electrothermal and electromagnetic mechanisms in which a bimetal forms the inductor for the electromagnetic mechanism

Definitions

  • the present invention relates to a magneto-thermal trip module for a pole of a multipole circuit breaker, this pole being provided with an input terminal and an output terminal, this module comprising a magnetic yoke having a shaped cross section of E defining two compartments arranged on either side of the central branch of E, this cylinder head being crossed by a bimetallic strip traversed by a current flowing between the input terminal and the output terminal, and associated with a movable pallet capable to be attracted against the polar surfaces of the magnetic yoke when the current flowing in the bimetallic strip exceeds a predetermined threshold, and to actuate in this case a trip bar for the circuit breaker.
  • Known trigger modules are constructed to be either of the high caliber type or the low caliber type.
  • the components are generally different in the two cases and not interchangeable according to the needs of the user. This constitutes a drawback which complicates the manufacture and storage of these devices (see US 3,278,707).
  • the present invention proposes to provide a solution to this problem by producing a trigger module which can come in two different variants depending on whether the user wishes to have a module of the high-caliber type or a module of the low caliber, while having the same basic components, but arranged differently.
  • the invention as defined in the preamble and characterized in that said bimetallic strip is placed in one of said compartments and is connected by a flexible conductive braid to a conductive part disposed either in the other adjacent compartment, or to the outside of the cylinder head as a function of the desired magnetic tripping threshold, that the pallet is biased in a position remote from the pole surfaces of the magnetic cylinder head by a return spring, and that adjustment means comprise a first adjusting screw of the initial deflection of the bimetallic strip, and a second adjustment screw for the air gap of the pallet.
  • FIG. 1 represents a pole of a multipole circuit breaker 10 having a molded insulating casing 12 and which comprises a single-pole breaking module 14, formed by a one-piece bulb 16 made of molded plastic, and having the shape of a rectangular parallelepiped.
  • the bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of a movable contact 24, two large parallel lateral faces 26, 28 and two small connecting faces 30, 32 parallel.
  • This tripping device comprises a magneto-thermal tripping module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the pole of the circuit breaker, called the output terminal .
  • the trip module 46 is inserted in series in the pole with the contacts 34, 36, 24 of the breaking module 14. It further comprises a bimetallic strip 54 traversed by the current flowing through the pole and a movable pallet 56.
  • the current enters through the input terminal 40 and flows successively in the first range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the pads 42 and 44, the trip module 46, the contact pad 48 and the output terminal 50.
  • the triggering device further comprises a trigger bar 52 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuating member of the trigger module 46, which is either bimetal 54 or the pallet 56.
  • the rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold.
  • a latch 58 for a mechanism 60 for controlling the toggle joint 62 and the lever 64 is
  • the mechanism 60 is common to all of the poles, only the handle 64 being accessible from the outside by passing through a passage light of the housing 12, for controlling the circuit breaker 10.
  • a lower link 80 of the toggle joint 62 is coupled to a protuberance 81 of a switching bar 82 serving to support the movable contacts 24 of all the poles.
  • the switching bar 82 is made of an insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.
  • the unlocking order of the lock 58 can come from the magneto-thermal trip module 46, or from an auxiliary trip, in particular with a lack of voltage MN, with emission of current MX, differential, etc.
  • the trigger module 46 is shown in more detail in the following figures.
  • Figures 2A, 2B and 2C illustrate a low-caliber trigger module and Figures 3A, 3B and 3C illustrate a high-caliber trigger module.
  • This trigger module 46 comprises a magnetic yoke 100 having an E-shaped cross section, as shown in FIGS. 2B and 3B. Therefore the central branch 101 of the cylinder head defines two compartments 102 and 103.
  • the bimetallic strip 54 which is connected by a flexible conductive braid 104 to a conductive part 105a ( Figure 2A) respectively 105b (Figure 3A ) which is connected to said fourth contact pad 48 (FIG. 1).
  • this trigger module is equipped with a pallet 56, articulated at 106 and urged towards a position remote from the cylinder head by a return spring 107.
  • the conductive part 105a is arranged in said second compartment 103 substantially parallel to the bimetallic strip 54.
  • the trigger module being of low caliber so that a short-circuit current can attract the pallet 56 for the purpose of tripping the circuit breaker by actuation of the trip bar, it is necessary, or desirable for reasons of operational safety, that the electrical circuit pass through the magnetic yoke twice. It is for this reason that the conductive part 105a is placed in said second compartment.
  • the conductive part 105b is arranged outside the magnetic yoke.
  • the trip module being of high caliber, a short-circuit current is sufficiently intense to attract the pallet 56 and trip the circuit breaker by actuation of the trip bar, without the electrical circuit crossing the magnetic yoke twice.
  • the cylinder head is equipped with an adjustment screw 108 which constitutes an adjustable stop pressed against the bimetallic strip 54.
  • This screw which is accessible from the rear of the trigger module is engaged in a bore threaded in the magnetic yoke and the adjustment is made by rotation of this screw in one direction or the other.
  • the yoke carries an adjustment screw 109 which has at its free end a hooking head 110 which passes through an opening made in the pallet and which opposes the traction exerted by the return spring 107.
  • this adjusting screw is accessible from the rear of the trigger module and the adjustment is made by rotation of this screw in one direction or the other.

Description

La présente invention concerne un module déclencheur magnéto-thermique pour un pôle d'un disjoncteur multipolaire, ce pôle étant pourvu d'une borne d'entrée et d'une borne de sortie, ce module comportant une culasse magnétique ayant une section transversale en forme de E définissant deux compartiments disposés de part et d'autre de la branche centrale du E, cette culasse étant traversée par un bilame parcouru par un courant circulant entre la borne d'entrée et la borne de sortie, et associée à une palette mobile susceptible d'être attirée contre les surfaces polaires de la culasse magnétique lorsque le courant qui circule dans le bilame dépasse un seuil prédéterminé, et pour actionner dans ce cas une barre de déclenchement du disjoncteur.The present invention relates to a magneto-thermal trip module for a pole of a multipole circuit breaker, this pole being provided with an input terminal and an output terminal, this module comprising a magnetic yoke having a shaped cross section of E defining two compartments arranged on either side of the central branch of E, this cylinder head being crossed by a bimetallic strip traversed by a current flowing between the input terminal and the output terminal, and associated with a movable pallet capable to be attracted against the polar surfaces of the magnetic yoke when the current flowing in the bimetallic strip exceeds a predetermined threshold, and to actuate in this case a trip bar for the circuit breaker.

Les modules déclencheurs connus sont construits pour être soit du type à calibre élevé soit du type à bas calibre. Les composants sont généralement différents dans les deux cas et non interchangeables en fonction des besoins de l'utilisateur. Ceci constitue un inconvénient qui complique la fabrication et le stockage de ces dispositifs (voir US 3278 707).Known trigger modules are constructed to be either of the high caliber type or the low caliber type. The components are generally different in the two cases and not interchangeable according to the needs of the user. This constitutes a drawback which complicates the manufacture and storage of these devices (see US 3,278,707).

La présente invention se propose d'apporter une solution à ce problème en réalisant un module déclencheur qui peut se présenter sous deux variantes différentes selon que l'utilisateur souhaite disposer d'un module du type à calibre élevé ou d'un module du type à bas calibre, tout en comportant les mêmes composants de base, mais agencés différemment.The present invention proposes to provide a solution to this problem by producing a trigger module which can come in two different variants depending on whether the user wishes to have a module of the high-caliber type or a module of the low caliber, while having the same basic components, but arranged differently.

Ce but est atteint par l'invention telle que définie en préambule et caractérisée en ce que ledit bilame est placé dans un desdits compartiments et est raccordé par une tresse souple conductrice à une pièce conductrice disposée soit dans l'autre compartiment adjacent, soit à l'extérieur de la culasse en fonction du seuil de déclenchement magnétique recherché, que la palette est sollicitée dans une position éloignée des surfaces polaires de la culasse magnétique par un ressort de rappel, et que des moyens de réglage comportent une première vis d'ajustage de la déflexion initiale du bilame, et une deuxième vis de réglage de l'entrefer de la palette .This object is achieved by the invention as defined in the preamble and characterized in that said bimetallic strip is placed in one of said compartments and is connected by a flexible conductive braid to a conductive part disposed either in the other adjacent compartment, or to the outside of the cylinder head as a function of the desired magnetic tripping threshold, that the pallet is biased in a position remote from the pole surfaces of the magnetic cylinder head by a return spring, and that adjustment means comprise a first adjusting screw of the initial deflection of the bimetallic strip, and a second adjustment screw for the air gap of the pallet.

La présente invention sera mieux comprise en référence à la description d'exemples de réalisation préférés mais non limitatifs et aux dessins annexés dans lesquels :

  • la figure 1 représente un pôle d'un disjoncteur multipolaire pourvu d'un module déclencheur selon l'invention,
  • les figures 2A, 2B et 2C représentent des vues en élévation et en coupe selon la ligne A et la ligne C d'un module déclencheur selon l'invention du type à bas calibre, et
  • les figures 3A, 3B et 3C représentent des vues en élévation et en coupe selon la ligne A et la ligne C d'un module déclencheur selon l'invention du type à calibre élevé.
The present invention will be better understood with reference to the description of preferred but nonlimiting exemplary embodiments and to the accompanying drawings in which:
  • FIG. 1 represents a pole of a multipole circuit breaker provided with a trip module according to the invention,
  • FIGS. 2A, 2B and 2C represent views in elevation and in section along line A and line C of a trigger module according to the invention of the low caliber type, and
  • Figures 3A, 3B and 3C show elevation and sectional views along line A and line C of a trigger module according to the invention of the high caliber type.

La figure 1 représente un pôle d'un disjoncteur multipolaire 10 ayant un boîtier 12 isolant moulé et qui comporte un module de coupure 14 unipolaire, formé par une ampoule 16 monobloc en matière plastique moulée, et ayant une forme de parallélépipède rectangle. L'ampoule 16 comprend un fond 18, une face avant 20 ayant un orifice 22 de passage d'un contact mobile 24, deux grandes faces latérales parallèles 26, 28 et deux petites faces de raccordement 30, 32 parallèles.FIG. 1 represents a pole of a multipole circuit breaker 10 having a molded insulating casing 12 and which comprises a single-pole breaking module 14, formed by a one-piece bulb 16 made of molded plastic, and having the shape of a rectangular parallelepiped. The bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of a movable contact 24, two large parallel lateral faces 26, 28 and two small connecting faces 30, 32 parallel.

A l'intérieur de l'ampoule 16 se trouvent deux contacts fixes 34, 36 reliés respectivement par des conducteurs 35, 37 de liaison à une première plage 38 d'une borne de raccordement 40, appelée borne d'entrée du pôle du disjoncteur, et à une deuxième plage 42 destinée à être connectée par une vis 43 à une troisième plage de contact 44 d'un dispositif de déclenchement.Inside the bulb 16 are two fixed contacts 34, 36 connected respectively by conductors 35, 37 connecting to a first area 38 of a connection terminal 40, called input terminal of the circuit breaker pole, and to a second pad 42 intended to be connected by a screw 43 to a third contact pad 44 of a tripping device.

Ce dispositif de déclenchement comporte un module déclencheur 46 magnéto-thermique, équipé à l'opposé de la plage 44, d'une quatrième plage de contact 48 faisant partie de l'autre borne 50 de raccordement du pôle du disjoncteur, appelée borne de sortie. Le module déclencheur 46 est inséré en série dans le pôle avec les contacts 34, 36, 24 du module de coupure 14. Il comporte en outre un bilame 54 parcouru par le courant circulant à travers le pôle et une palette mobile 56.This tripping device comprises a magneto-thermal tripping module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the pole of the circuit breaker, called the output terminal . The trip module 46 is inserted in series in the pole with the contacts 34, 36, 24 of the breaking module 14. It further comprises a bimetallic strip 54 traversed by the current flowing through the pole and a movable pallet 56.

Dans l'état fermé du disjoncteur, le courant rentre par la borne d'entrée 40 et circule successivement dans la première plage 38, le conducteur 35, le contact fixe 34, le contact mobile 24, l'autre contact fixe 36, le conducteur 37, les plages 42 et 44, le module déclencheur 46, la plage de contact 48 et la borne de sortie 50.In the closed state of the circuit breaker, the current enters through the input terminal 40 and flows successively in the first range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the pads 42 and 44, the trip module 46, the contact pad 48 and the output terminal 50.

Le dispositif de déclenchement comprend d'autre part une barre de déclenchement 52 montée à rotation limitée entre une position armée et une position déclenchée en fonction de la position de l'organe d'actionnement du module déclencheur 46, qui est soit le bilame 54 soit la palette 56. La barre rotative 52 est déplacée vers la position déclenchée dès que le courant circulant dans le pôle dépasse un seuil prédéterminé. Elle coopère d'autre part avec un verrou d'accrochage 58 d'un mécanisme 60 de commande à genouillère 62 et à manette 64.The triggering device further comprises a trigger bar 52 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuating member of the trigger module 46, which is either bimetal 54 or the pallet 56. The rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold. On the other hand, it cooperates with a latch 58 for a mechanism 60 for controlling the toggle joint 62 and the lever 64.

Le mécanisme 60 est commun à l'ensemble des pôles, seule la manette 64 étant accessible de l'extérieur en traversant une lumière de passage du boîtier 12, pour la commande du disjoncteur 10.The mechanism 60 is common to all of the poles, only the handle 64 being accessible from the outside by passing through a passage light of the housing 12, for controlling the circuit breaker 10.

Une biellette inférieure 80 de la genouillère 62 est couplée à une protubérance 81 d'un barreau de commutation 82 servant de support aux contacts mobiles 24 de tous les pôles. Le barreau de commutation 82 est réalisé en un matériau isolant et s'étend parallèlement à la barre de déclenchement 52 dans la direction transversale des pôles.A lower link 80 of the toggle joint 62 is coupled to a protuberance 81 of a switching bar 82 serving to support the movable contacts 24 of all the poles. The switching bar 82 is made of an insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.

Une action de déverrouillage de la barre de déclenchement 52 sur le verrou 58 libère le mécanisme 60 qui se désarme sous l'action de détente d'un ressort d'embiellage 72, entraînant le déplacement par pivotement de la genouillère 62 et la rotation du barreau 82 vers la position d'ouverture des contacts 34, 36, 24 de tous les pôles. L'ordre de déverrouillage du verrou 58 peut provenir du module déclencheur magnéto-thermique 46, ou d'un déclencheur auxiliaire, notamment à manque de tension MN, à émission de courant MX, différentiel, etc...An unlocking action of the trigger bar 52 on the latch 58 releases the mechanism 60 which disarms under the trigger action of a connecting rod spring 72, causing the pivoting movement of the toggle joint 62 and the rotation of the bar 82 to the open position of contacts 34, 36, 24 of all the poles. The unlocking order of the lock 58 can come from the magneto-thermal trip module 46, or from an auxiliary trip, in particular with a lack of voltage MN, with emission of current MX, differential, etc.

Le module déclencheur 46 est représenté plus en détail par les figures suivantes. Les figures 2A, 2B et 2C illustrent un module déclencheur de bas calibre et les figures 3A, 3B et 3C illustrent un module déclencheur de calibre élevé. Ce module déclencheur 46 comporte une culasse magnétique 100 ayant une section transversale en forme de E, comme le montrent les figures 2B et 3B. De ce fait la branche centrale 101 de la culasse définit deux compartiments 102 et 103. Dans le premier compartiment 102 est placé le bilame 54 qui est raccordé par une tresse souple conductrice 104 à une pièce conductrice 105a (figure 2A) respectivement 105b (figure 3A) qui est connectée à ladite quatrième plage de contact 48 (figure 1). Par ailleurs, ce module déclencheur est équipé d'une palette 56, articulée en 106 et sollicitée vers une position éloignée de la culasse par un ressort de rappel 107.The trigger module 46 is shown in more detail in the following figures. Figures 2A, 2B and 2C illustrate a low-caliber trigger module and Figures 3A, 3B and 3C illustrate a high-caliber trigger module. This trigger module 46 comprises a magnetic yoke 100 having an E-shaped cross section, as shown in FIGS. 2B and 3B. Therefore the central branch 101 of the cylinder head defines two compartments 102 and 103. In the first compartment 102 is placed the bimetallic strip 54 which is connected by a flexible conductive braid 104 to a conductive part 105a (Figure 2A) respectively 105b (Figure 3A ) which is connected to said fourth contact pad 48 (FIG. 1). Furthermore, this trigger module is equipped with a pallet 56, articulated at 106 and urged towards a position remote from the cylinder head by a return spring 107.

Dans le cas du déclencheur selon les figures 2A, 2B et 2C, la pièce conductrice 105a est disposée dans ledit deuxième compartiment 103 sensiblement parallèlement au bilame 54. Le module déclencheur étant de bas calibre pour qu'un courant de court-circuit puisse attirer la palette 56 en vue du déclenchement du disjoncteur par actionnement de la barre de déclenchement, il est nécessaire, ou souhaitable pour des raisons de sécurité de fonctionnement, que le circuit électrique traverse deux fois la culasse magnétique. C'est pour cette raison que la pièce conductrice 105a est placée dans ledit deuxième compartiment.In the case of the trigger according to FIGS. 2A, 2B and 2C, the conductive part 105a is arranged in said second compartment 103 substantially parallel to the bimetallic strip 54. The trigger module being of low caliber so that a short-circuit current can attract the pallet 56 for the purpose of tripping the circuit breaker by actuation of the trip bar, it is necessary, or desirable for reasons of operational safety, that the electrical circuit pass through the magnetic yoke twice. It is for this reason that the conductive part 105a is placed in said second compartment.

Dans le cas du module selon les figures 3A, 3B et 3C, la pièce conductrice 105b est disposée à l'extérieur de la culasse magnétique. Le module déclencheur étant de calibre élevé, un courant de court-circuit est suffisamment intense pour attirer la palette 56 et déclencher le disjoncteur par actionnement de la barre de déclenchement, sans que le circuit électrique traverse deux fois la culasse magnétique.In the case of the module according to FIGS. 3A, 3B and 3C, the conductive part 105b is arranged outside the magnetic yoke. The trip module being of high caliber, a short-circuit current is sufficiently intense to attract the pallet 56 and trip the circuit breaker by actuation of the trip bar, without the electrical circuit crossing the magnetic yoke twice.

L'avantage de cette construction est qu'elle offre une utilisation très souple pour l'utilisateur. L'une ou l'autre des réalisations qui sont très proches l'une de l'autre en ce qui concerne les composants qui les constituent, est mise en place selon les besoins et le souhait de l'utilisateur.The advantage of this construction is that it offers a very flexible use for the user. One or other of the embodiments which are very close to one another as regards the components which constitute them, is put in place according to the needs and the wish of the user.

Pour permettre un réglage initial de la déflexion du bilame, la culasse est équipée d'une vis de réglage 108 qui constitue une butée réglable appuyée contre le bilame 54. Cette vis qui est accessible de l'arrière du module déclencheur est engagée dans un alésage fileté ménagé dans la culasse magnétique et le réglage se fait par rotation de cette vis dans un sens ou dans l'autre.To allow an initial adjustment of the deflection of the bimetallic strip, the cylinder head is equipped with an adjustment screw 108 which constitutes an adjustable stop pressed against the bimetallic strip 54. This screw which is accessible from the rear of the trigger module is engaged in a bore threaded in the magnetic yoke and the adjustment is made by rotation of this screw in one direction or the other.

Pour assurer le réglage initial de l'entrefer entre la palette 56 et les surfaces polaires de la culasse magnétique, la culasse porte une vis de réglage 109 qui comporte à son extrémité libre une tête d'accrochage 110 qui traverse une ouverture ménagée dans la palette et qui s'oppose à la traction exercée par le ressort de rappel 107. Comme précédemment cette vis de réglage est accessible depuis l'arrière du module déclencheur et le réglage se fait par rotation de cette vis dans un sens ou dans l'autre.To ensure the initial adjustment of the air gap between the pallet 56 and the pole surfaces of the magnetic yoke, the yoke carries an adjustment screw 109 which has at its free end a hooking head 110 which passes through an opening made in the pallet and which opposes the traction exerted by the return spring 107. As previously, this adjusting screw is accessible from the rear of the trigger module and the adjustment is made by rotation of this screw in one direction or the other.

Claims (3)

  1. A magnetothermal trip module for a pole of a multipole circuit breaker (10), equipped with an input terminal (40) and an output terminal (50), the module comprising a magnetic yoke (100) having an E-shaped transverse cross section defining two compartments arranged on each side of the central branch of the E, through which yoke (100) there passes a bimetal strip (54) through which a current flows between the input terminal (40) and the output terminal (50), and this yoke being associated to a movable blade (56) able to be attracted against the polar surfaces of the magnetic yoke (100) when the current flowing in the bimetal strip (54) exceeds a preset threshold, and to actuate in this case a trip bar (52) of the circuit breaker, characterized in that said bimetal strip (54) is placed in one of said compartments (102) and is connected by a flexible conducting braid (104) to a conducting part (105a, 105b) arranged either in the other adjacent compartment (103) or outside the yoke (100) depending on the magnetic tripping threshold required, that the blade (56) is urged to a position separated from the polar surfaces of the magnetic yoke by a retum spring (107), and that the adjustment means comprise a first adjustment screw (108) for adjusting the initial deflection of the bimetal strip (54), and a second adjustment screw (109) for adjusting the air-gap of the blade (56).
  2. The module according to claim 1, characterized in that the first adjustment screw (108) is engaged through a threaded bore arranged in the magnetic yoke (100) and that its end is pressing against the bimetal strip (54).
  3. The module according to claim 1 or 2, characterized in that the second adjustment screw (109) comprises a latching head (110) which passes through an opening arranged in the blade (56).
EP19940410019 1993-04-08 1994-03-30 Magnetothermal trip unit Expired - Lifetime EP0619591B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304299 1993-04-08
FR9304299A FR2703823B1 (en) 1993-04-08 1993-04-08 Magneto-thermal trip module.

Publications (2)

Publication Number Publication Date
EP0619591A1 EP0619591A1 (en) 1994-10-12
EP0619591B1 true EP0619591B1 (en) 1997-03-12

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Family Applications (1)

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EP19940410019 Expired - Lifetime EP0619591B1 (en) 1993-04-08 1994-03-30 Magnetothermal trip unit

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EP (1) EP0619591B1 (en)
DE (1) DE69401971T2 (en)
ES (1) ES2101468T3 (en)
FR (1) FR2703823B1 (en)

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Also Published As

Publication number Publication date
EP0619591A1 (en) 1994-10-12
DE69401971T2 (en) 1997-08-14
ES2101468T3 (en) 1997-07-01
DE69401971D1 (en) 1997-04-17
FR2703823B1 (en) 1995-05-12
FR2703823A1 (en) 1994-10-14

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