EP0200581B1 - Mechanisms of fault current protective switches which enable their coupling in or to automatic breakers - Google Patents

Mechanisms of fault current protective switches which enable their coupling in or to automatic breakers Download PDF

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Publication number
EP0200581B1
EP0200581B1 EP86400503A EP86400503A EP0200581B1 EP 0200581 B1 EP0200581 B1 EP 0200581B1 EP 86400503 A EP86400503 A EP 86400503A EP 86400503 A EP86400503 A EP 86400503A EP 0200581 B1 EP0200581 B1 EP 0200581B1
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EP
European Patent Office
Prior art keywords
spring
circuit breaker
relay
rocking lever
lever
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
EP86400503A
Other languages
German (de)
French (fr)
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EP0200581A1 (en
Inventor
José Maria Elizalde
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.)
ELECTROTECNICA F DE RODA SA
Original Assignee
ELECTROTECNICA F DE RODA SA
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Filing date
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Publication of EP0200581A1 publication Critical patent/EP0200581A1/en
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Publication of EP0200581B1 publication Critical patent/EP0200581B1/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/58—Manual reset mechanisms which may be also used for manual release actuated by push-button, pull-knob, or slide

Definitions

  • the present invention relates to differential circuit breaker mechanisms to allow their coupling in or to automatic circuit breakers.
  • the active element in which the disconnection triggering begins that is to say the relay
  • this differential circuit breaker mechanism in addition to its tripping and resetting device which has the characteristics set out above with regard to precision and low inertia, there is also present the corresponding circuit test button which allows to check, at any time, the proper functioning of the device. According to the invention, this test button does not complicate the whole mechanism at all because of its design, the return spring of this button is used as a conductive element which establishes the closing of the test circuit.
  • the device according to the invention has, by virtue of its new design, a plurality of advantageous characteristics among which one can cite the fact that it comprises a single intermediate piece of plastic , a floating adjustable trigger relay, simple mounting and adjustment, a test button for highly sensitive operation and absolute reliability.
  • the apparatus comprises, as can be seen in FIG. 1, an electromechanical assembly housed in a carcass 1 made of a dielectric material and which is separated into two separate compartments, namely a compartment for housing a transformer 2 and another compartment in which is located the actual differential mechanism which is triggered by the action of a relay 3 whose central rod is movable.
  • the differential mechanism warns of its triggering by the output to the outside of a push button 4 which also constitutes the element used for resetting it.
  • This push button 4 carries, inside, a projection 5 on which bears a spring 6 against which the rearming takes place, this spring being the element which causes the push button to exit in the case an anomaly in the circuit.
  • the lower internal part of the push button 4 has a recess in which a pawl 7 can be hooked held in this position by a spring 8, a position which ensures the retention of the push button 4.
  • a balance 9 articulated in its central part comprising two branches practically square, which constitutes a part with several functions cooperating, on one side, with the pawl 7 and also, on the other side, with an intermediate piece 15 as well as with a spring 13.
  • This pendulum 9 maintains its position of equilibrium against a spring wound on its axis of rotation, as a result of the retention carried out by a lever bent with a piece 10, of plastic material, which constitutes the single element existing between the relay 3 and the rest of the differential mechanism.
  • the position of this lever 10 is also determined by the action of a spring 11.
  • the intermediate part 15 (FIG. 3) constitutes, between the carcass 1 and the rest of the housing which contains the disconnection contacts, a floating part, having the possibility of a sliding movement, the axis of rotation being indicated by the reference 18 in FIG. 3.
  • This part 15 is actuated, on one side on which it has a protuberance or a stud, by the pendulum 9 and it receives, on the other side, a rod 16 which constitutes the disconnection element poles of automatic circuit breakers.
  • the absolute protection of this sliding intermediate piece 15 ensures a perfect transmission following any requirement or external action.
  • relay 3 its mounting is, as can be seen in FIG. 1, of the floating type and it is held by an adjustment screw 14 engaged in a lower appendage 17 which projects from the frame of the relay 3.
  • This screw 14 makes it possible to approach the relay 3 more or less of the lever 10.
  • the screw 14 carries a coaxial helical spring which brakes it and fixes the chosen position.
  • the pendulum 9 returns to its position shown in FIG. 1 when the reset push-button 4 is pressed, however after having resolved the cause which produced the trip.
  • the push button 4 rotates the balance 9 in the opposite direction which is then immobilized in a fixed position if the position of the bent lever 10 allows it.

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  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

La présente invention concerne des mécanismes de disjoncteurs différentiels pour permettre leur accouplement dans ou à des disjoncteurs automatiques.The present invention relates to differential circuit breaker mechanisms to allow their coupling in or to automatic circuit breakers.

Ces perfectionnements concernent le faitque, dans le mécanisme de disjoncteur ainsi perfectionné, il est prévu, entre l'élément actif qui délivre le signal de coupure et qui est formé par un relais à tige mobile, et l'élément qui agit sur l'ensemble de déconnexion, une seule pièce en forme de levier angulaire dont la constitution monobloc et en matière plastique présente des avantages évidents en ce qui concerne la durée de service, la précision de réalisation, l'entretien nul, l'emploi d'un matériau diélectrique et la faible inertie, qui font, dans leur ensemble, du mécansime différentiel un élément ayant une précision et une fiabilité que l'on n'a pu atteindre jusqu'à ce jour.These improvements relate to the fact that, in the circuit breaker mechanism thus improved, provision is made between the active element which delivers the cut-off signal and which is formed by a relay with movable rod, and the element which acts on the whole of disconnection, a single piece in the form of an angular lever whose monobloc and plastic constitution has obvious advantages with regard to the service life, the precision of production, zero maintenance, the use of a dielectric material and the low inertia, which make, as a whole, the differential mechanism an element having a precision and a reliability which one could not reach until today.

Un détail additionnel important que présente l'invention est le fait que l'élément actif dans lequel commence le déclenchement de déconnexion, c'est-à-dire le relais, a une position flottante qui peut être modifiée facilement sous l'action d'une vis autofreinée par un ressort coaxial, ce qui permet de régler de cette façon, avec la précision voulue, l'action de déconnexion dans une marge très étroite, en fonction de chaque installation concrète, et ce que permet aussi de grande tolérances lors de la fabrication, tout en fournissant un appareil d'une précision garantie.An additional important detail presented by the invention is the fact that the active element in which the disconnection triggering begins, that is to say the relay, has a floating position which can be easily modified under the action of a screw self-locking by a coaxial spring, which allows to adjust in this way, with the desired precision, the disconnection action within a very narrow margin, depending on each concrete installation, and what also allows great tolerances during manufacturing, while providing a device with guaranteed precision.

Dans ce mécanisme de disjoncteur différentiel suivant l'invention, outre son dispositif de déclenchement et de réarmement qui présente les caractéristiques exposées ci-dessus en ce qui concerne la précision et la faible inertie, est également présent le bouton correspondant de test du circuit qui permet de constater, à n'importe quel moment, le bon fonctionnement de l'appareil. Suivant l'invention ce bouton de test ne complique pas du tout l'ensemble du mécanisme du fait que, de par sa conception, le ressort de rappel de ce bouton est utilisé comme élément conducteur qui établit la fermeture du circuit de test.In this differential circuit breaker mechanism according to the invention, in addition to its tripping and resetting device which has the characteristics set out above with regard to precision and low inertia, there is also present the corresponding circuit test button which allows to check, at any time, the proper functioning of the device. According to the invention, this test button does not complicate the whole mechanism at all because of its design, the return spring of this button is used as a conductive element which establishes the closing of the test circuit.

Par rapport aux appareils connus jusqu'à ce jour l'appareil suivant l'invention présente, de par sa nouvelle conception, une pluralité de caractéristiques avantageuses parmi lesquelles on peut citer le fait qu'il comprend une pièce intermé- diaiare unique en matière plastique, un relais de déclenchement ajustable en position flottante, une simplicité de montage et de réglage, un bouton de test d'un fonctionnement à grande sensibilité et une fiabilité absolue.Compared to the devices known to date, the device according to the invention has, by virtue of its new design, a plurality of advantageous characteristics among which one can cite the fact that it comprises a single intermediate piece of plastic , a floating adjustable trigger relay, simple mounting and adjustment, a test button for highly sensitive operation and absolute reliability.

Ces avantages ainsi que d'autres, qui sont apportés par l'appareil suivant l'invention présentement décrit sont tout à fait distincts et originaux par rapport aux appareils connus antérieurement.These advantages as well as others, which are provided by the apparatus according to the invention described herein are quite distinct and original compared to the previously known apparatuses.

On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel:

  • La figure 1 est une vue en élévation d'un appareil suivant l'invention, son couvercle étant retiré pour permettre de voir l'intérieur de cet appareil.
  • La figure 2 est une vue en coupe faite suivant la ligne II-II de la figure 1, cette vue montrant partiellement la configuration de la carcasse du disjoncteur.
  • La figure 3 est une vue en coupe faite suivant la ligne III-III de la figure 1, cette vue montrant la pièce intermédiaire qui transmet le mouvement de déclenchement.
  • La figure 4 est un schéma de la configuration du circuit de test.
An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
  • Figure 1 is an elevational view of an apparatus according to the invention, its cover being removed to allow the interior of this apparatus to be seen.
  • Figure 2 is a sectional view taken along the line II-II of Figure 1, this view partially showing the configuration of the frame of the circuit breaker.
  • Figure 3 is a sectional view taken along line III-III of Figure 1, this view showing the intermediate piece which transmits the triggering movement.
  • Figure 4 is a diagram of the configuration of the test circuit.

L'appareil suivant l'invention comprend, comme on peut le voir sur la figure 1, un ensemble électromécanique logé dans une carcasse 1 en un matériau diélectrique et qui est séparée en deux compartiments distincts à savoir un compartiment pour le logement d'un transformateur 2 et un autre compartiment dans lequel se trouve le mécanisme différentiel proprement dit qui est déclenché sous l'action d'un relais 3 dont la tige centrale est mobile.The apparatus according to the invention comprises, as can be seen in FIG. 1, an electromechanical assembly housed in a carcass 1 made of a dielectric material and which is separated into two separate compartments, namely a compartment for housing a transformer 2 and another compartment in which is located the actual differential mechanism which is triggered by the action of a relay 3 whose central rod is movable.

Le mécanisme différentiel avertit de son déclenchement par la sortie à l'extérieur d'un bouton-poussoir 4 qui constitue également l'élément servant à son réarmement. Ce bouton-poussoir 4 porte, à l'intérieur, une saillie 5 sur laquelle prend appui un ressort 6 à l'encontre duquel s'effectue le réarmement, ce ressort étant l'élément qui provoque la sortie du bouton-poussoir dans le cas d'une anomalie dans le circuit. La partie interne inférieure du bouton-poussoir 4 présente un creux dans lequel peut s'accrocher un cliquet 7 maintenu dans cette position par un ressort 8, position qui assure la retenue du bouton-poussoir 4.The differential mechanism warns of its triggering by the output to the outside of a push button 4 which also constitutes the element used for resetting it. This push button 4 carries, inside, a projection 5 on which bears a spring 6 against which the rearming takes place, this spring being the element which causes the push button to exit in the case an anomaly in the circuit. The lower internal part of the push button 4 has a recess in which a pawl 7 can be hooked held in this position by a spring 8, a position which ensures the retention of the push button 4.

Au centre du mécanisme différentiel se trouve, comme on peut le voir sur la figure 1, un balancier 9 articulé dans sa partie centrale, comportant deux branches pratiquement à l'équerre, lequel constitue une pièce à plusieurs fonctions coopérant, d'un côté, avec le cliquet 7 et également, de l'autre côté, avec une pièce intermédiaire 15 ainsi qu'avec un ressort 13. Ce balancier 9 maintient sa position d'équilibre à l'encontre d'un ressort enroulé sur son axe de rotation, par suite de la retenue réalisée par un levier coudé d'une pièce 10, en matière plastique, qui constitue l'élément unique existant entre le relais 3 et le reste du mécanisme différentiel. La position de ce levier 10 est également déterminée par l'action d'un ressort 11.At the center of the differential mechanism is, as can be seen in FIG. 1, a balance 9 articulated in its central part, comprising two branches practically square, which constitutes a part with several functions cooperating, on one side, with the pawl 7 and also, on the other side, with an intermediate piece 15 as well as with a spring 13. This pendulum 9 maintains its position of equilibrium against a spring wound on its axis of rotation, as a result of the retention carried out by a lever bent with a piece 10, of plastic material, which constitutes the single element existing between the relay 3 and the rest of the differential mechanism. The position of this lever 10 is also determined by the action of a spring 11.

La pièce intermédiaire 15 (figure 3) constitue, entre la carcasse 1 et le reste du boîtier qui contient les contacts de déconnexion, une pièce flottante, ayant la possibilité d'un mouvement de glissement, l'axe de rotation étant indiqué par la référence 18 sur la figure 3. Cette pièce 15 est actionnée, d'un côté sur lequel elle présente une protubérance ou un téton, par le balancier 9 et elle reçoit, de l'autre côté, une tige 16 qui constitue l'élément de déconnexion des poles des disjoncteurs automatiques. La protection absolue de cette pièce intermédiaire glissante 15 assure une transmission parfaite à la suite d'une quelconque exigence ou action extérieure.The intermediate part 15 (FIG. 3) constitutes, between the carcass 1 and the rest of the housing which contains the disconnection contacts, a floating part, having the possibility of a sliding movement, the axis of rotation being indicated by the reference 18 in FIG. 3. This part 15 is actuated, on one side on which it has a protuberance or a stud, by the pendulum 9 and it receives, on the other side, a rod 16 which constitutes the disconnection element poles of automatic circuit breakers. The absolute protection of this sliding intermediate piece 15 ensures a perfect transmission following any requirement or external action.

On a mentionné précédemment, à propos du balancier 9, l'existence du ressort 13 qui est articulé sur le même axe que le levier coudé 10. Ce ressort 13, du fait de sa constitution en un matériau métallique conducteur de l'électricité, agit à la fois en tant que ressort pour l'actionnement d'un bouton de test 12 et, comme on peut le voir sur le schéma de la figure 4, en tant qu'élément conducteur complètant le circuit électrique, pour provoquer son déclenchement, et tout cela au moyen d'un seul élément à fonction multiple, présentant une grande fiabilité, une économie et une simplicité de montage.We have previously mentioned, with regard to the pendulum 9, the existence of the spring 13 which is articulated on the same axis as the bent lever 10. This spring 13, due to its constitution in a metallic material which conducts electricity, acts both as a spring for actuating a test button 12 and, as can be seen in the diagram in FIG. 4, as a conducting element completing the electrical circuit, to cause it to trip, and all this by means of a single element with multiple functions, offering great reliability, economy and simplicity of assembly.

En ce qui concerne le relais 3 son montage est, comme on peut le voir sur la figure 1, du type flottant et il est maintenu par une vis de réglage 14 engagée dans un appendice inférieur 17 qui fait saillie à partir de la carcasse du relais 3. Cette vis 14 permet d'approcher plus ou moins le relais 3 du levier 10. La vis 14 porte un ressort hélicoïdal coaxial qui la freine et fixe la position choisie.As for relay 3, its mounting is, as can be seen in FIG. 1, of the floating type and it is held by an adjustment screw 14 engaged in a lower appendage 17 which projects from the frame of the relay 3. This screw 14 makes it possible to approach the relay 3 more or less of the lever 10. The screw 14 carries a coaxial helical spring which brakes it and fixes the chosen position.

Le mécanisme, tel qu'il est représenté sur la figure 1, se trouve en position armée et si, par suite de l'apparition d'une anomalie dans le circuit électrique dans lequel le disjoncteur est monté ou par suite de l'actionnement du bouton de test 12, il se produit un déclenchement, le relais 3 actionne, par l'intermédiaire de sa tige, le levier coudé 10 à l'encontre de son ressort de rappel 11. Cette action a pour effect de libérer l'extrémité supérieure du balancier 9 lequel tourne dans le sens inverse des aiguilles d'une montre sous l'action de son ressort coaxial en produisant les effets suivants:

  • En premier lieu il déplace la pièce intermédiaire 15 en provoquant la déconnexion des contacts respectifs:
  • En deuxième lieu il actionne, par sa queue, le cliquet 7 en le repoussant et en libérant ainsi le bouton-poussoir 4 qui fait alors saillie à l'extérieur;
  • En troisième lieu il déplace, comme on peut le voir sur le schéma de la figure 4, le ressort conducteur 13, en coupant ainsi le circuit de test;
  • En quantrième lieu il réarme le relais 3.
The mechanism, as shown in FIG. 1, is in the armed position and if, following the appearance of an anomaly in the electrical circuit in which the circuit breaker is mounted or following the actuation of the test button 12, a trigger occurs, the relay 3 actuates, by means of its rod, the bent lever 10 against its return spring 11. This action has the effect of releasing the upper end of the pendulum 9 which rotates anti-clockwise under the action of its coaxial spring, producing the following effects:
  • First, it moves the intermediate part 15, causing the respective contacts to be disconnected:
  • Secondly it actuates, by its tail, the pawl 7 by pushing it back and thus releasing the push button 4 which then projects outside;
  • Thirdly, it displaces, as can be seen in the diagram in FIG. 4, the conductive spring 13, thereby cutting off the test circuit;
  • In the third place it resets relay 3.

Ces quatre actions sont réalisées simultanément au moyen de mécanismes indépendants qui, en réalité, n'ont rien de commun entre eux, en ne causant aucun dommage pour le fonctionnement correct de l'ensemble.These four actions are carried out simultaneously by means of independent mechanisms which, in reality, have nothing in common with each other, causing no damage to the correct functioning of the assembly.

Le balancier 9 revient à sa position représentée sur la figure 1 lorsqu'on appuie sur le bouton-poussoir de réarmement 4, toutefois après avoir résolu la cause ayant produit le déclenchement. Le bouton-poussoir 4 fait tourner le balancier 9 en sens inverse lequel est alors immobilisé en position fixe si la position du levier coudé 10 le permet.The pendulum 9 returns to its position shown in FIG. 1 when the reset push-button 4 is pressed, however after having resolved the cause which produced the trip. The push button 4 rotates the balance 9 in the opposite direction which is then immobilized in a fixed position if the position of the bent lever 10 allows it.

Claims (5)

1. Differential circuit breaker mechanism adapted to be coupled in or to an automatic circuit breaker in order to cut off a protected electrical circuit in the event of defect, comprising a relay (3) which triggers off the circuit breaker and a central rocking lever (9) which acts on means for cutting off the protected electrical circuit and which provokes emergence of a resetting push button (4) against a spring (6), characterized in that it comprises a monobloc element made of plastics material, in the form of a bent lever (10), articulated about its central part (29) against a spring (11), this monobloc element (10) being placed between the relay (3) and the central rocking lever (9) and ensuring retention of the rocking lever (9) in its set position.
2. Differential circuit breaker mechanism according to Claim 1, characterized in that the relay (3) is mounted in an adjustable floating position by means of a screw (14) provided with a helical spring (20) for coaxial braking, in order to adjust the position of the assembly of the relay (3) with respect to the bent lever (10).
3. Differential circuit breaker mechanism comprising a test button (12), according to either one of the preceding claims, characterized in that the test button (12) is in contact with a first branch of an angular spring (13) constituted by an electrically conducting wire, wound on itself and about the point of pivoting of the central part of the bent lever (10), this spring (13) serving as bridging element in the test circuit, and the rocking lever (9) is in contact with the lower branch of the spring (13) so as to provoke cut-off of the test circuit when the mechanism is triggered off, further to the rotation of the rocking lever (9) which then causes separation of the lower branch of the spring (13) from the lower point of contact of this branch in the test circuit.
4. Differential circuit breaker mechanism according to any one of the preceding claims, characterized in that the protected electrical circuit cut-off means are constituted by an intermediate piece (15) mounted to rotate about an axis (18), actuated via a protuberance or lug on which the rocking lever (9) acts during rotation thereof, this intermediate piece (15) presenting a hollow for a rod (16) or like element which provokes disconnection of the poles of the protected electrical circuit.
5. Differential circuit breaker mechanism according to any one of the preceding claims, characterized in that the resetting push button (4) presents, inside the casing (1) of the mechanism, a hollow in which is hooked a pawl (7) urged by a spring (8) and which pivots about its central part.
EP86400503A 1985-03-08 1986-03-10 Mechanisms of fault current protective switches which enable their coupling in or to automatic breakers Expired - Lifetime EP0200581B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES1985285200U ES285200Y (en) 1985-03-08 1985-03-08 IMPROVEMENTS INTRODUCED IN THE MECHANISMS OF DIFFERENTIAL SWITCHES FOR COUPLING IN OR TO AUTOMATIC SWITCHES
ES285200 1985-03-08

Publications (2)

Publication Number Publication Date
EP0200581A1 EP0200581A1 (en) 1986-11-05
EP0200581B1 true EP0200581B1 (en) 1990-08-08

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Application Number Title Priority Date Filing Date
EP86400503A Expired - Lifetime EP0200581B1 (en) 1985-03-08 1986-03-10 Mechanisms of fault current protective switches which enable their coupling in or to automatic breakers

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EP (1) EP0200581B1 (en)
DE (1) DE3673225D1 (en)
ES (1) ES285200Y (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616585A1 (en) * 1987-06-11 1988-12-16 Hager Electro TEST DEVICE FOR A DIFFERENTIAL PROTECTIVE ELECTRICAL APPARATUS INCORPORATING THIS DEVICE, IN PARTICULAR FOR A DIFFERENTIAL CIRCUIT BREAKER
FR2662019B1 (en) * 1990-05-10 1992-07-24 Merlin Gerin TEST CIRCUIT FOR A DIFFERENTIAL TRIGGER.
EP2339606B1 (en) * 2009-12-24 2012-07-11 Hager Electro Sas Electric line-protection lock mechanism with differential function

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1466250A (en) * 1965-03-01 1967-01-20 High breaking capacity branch circuit breaker, more especially bipolar
DE2659771C2 (en) * 1976-12-31 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Release for residual current circuit breaker
DE2834327C2 (en) * 1978-08-04 1983-01-13 Heinrich Kopp Gmbh & Co Kg, 8756 Kahl Full electrical circuit breaker

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DE3673225D1 (en) 1990-09-13
EP0200581A1 (en) 1986-11-05
ES285200U (en) 1985-09-16
ES285200Y (en) 1986-05-01

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