EP1647041B1 - Differential switch provided with a test circuit - Google Patents

Differential switch provided with a test circuit Download PDF

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Publication number
EP1647041B1
EP1647041B1 EP04767737A EP04767737A EP1647041B1 EP 1647041 B1 EP1647041 B1 EP 1647041B1 EP 04767737 A EP04767737 A EP 04767737A EP 04767737 A EP04767737 A EP 04767737A EP 1647041 B1 EP1647041 B1 EP 1647041B1
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EP
European Patent Office
Prior art keywords
contact
automatic interruption
arm
circuit breaker
current circuit
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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.)
Not-in-force
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EP04767737A
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German (de)
French (fr)
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EP1647041A2 (en
Inventor
Pierre Cimiez Parc KOCH
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.)
Legrand SNC
Legrand France SA
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Legrand SNC
Legrand France SA
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Priority to PL04767737T priority Critical patent/PL1647041T3/en
Publication of EP1647041A2 publication Critical patent/EP1647041A2/en
Application granted granted Critical
Publication of EP1647041B1 publication Critical patent/EP1647041B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—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

Definitions

  • the invention relates to the field of protection of electrical installations and people.
  • It relates more particularly to a differential switch provided with a test circuit for ensuring the proper operation of the differential switch.
  • the differential switches are circuit breakers able to trigger automatically to open an electrical circuit when it has a leakage current.
  • conductors connected to the electrical circuit to be protected are surrounded by an induction coil and, when the intensity of the current flowing in one direction is different from the intensity of the current flowing in the other direction. (which reveals the presence of a leakage current on the electrical circuit to be protected), an induced current is created in the coil and allows to supply an actuator which triggers the mechanism with the consequence of opening a pair of power contacts which cut at least one pole of the circuit.
  • the differential switches generally comprise a test circuit that makes it possible to simulate the presence of a leakage current and thus to check the correct tripping of the differential switch.
  • the principle commonly used to simulate such a leakage current consists in creating, within the differential switch, a bypass circuit comprising a resistor, one of whose terminals is connected to a pole of the circuit. electrical to protect on one side of the induction coil, and the other terminal is connected to another pole of the electrical circuit to be protected on the other side of the induction coil.
  • a simulated leakage current depending on the value of the resistance, is thus created.
  • This branch circuit is kept open by a test switch, for example of the push switch type, which is accessible from the differential switch housing for a user to implement the test function.
  • a pressure on the test contactor while the differential switch is triggered leads to connect the terminals of the devices of the electrical circuit to be protected across the test resistor, which presents a danger especially if these devices can store energy as is the case for example of a TV.
  • EP 0 456 586 discloses a test circuit for a differential release and having different springs, one of these springs cooperating with a transmission part of the actuating mechanism of the release so as to open the test circuit when the differential release has been actuated.
  • the document EP 0 295 167 describes a test set for differential electrical protection apparatus.
  • the test assembly comprises a conductive blade with two branches, one of the branches providing the function of the test push switch and the other branch ensuring the self-cutting. being separated from its contact position by an element of the contact opening mechanism which is intended to open the electrical circuit to be protected.
  • the document GB 2026244 A discloses a differential switch according to the preamble of claim 1.
  • the aim of the invention is to improve such a differential switch provided with a test circuit, particularly with regard to the self-cutting function.
  • the elements for performing the self-cutting function of such a differential switch are directly related to the elements for performing the function of opening the electrical circuit to be protected.
  • the self-cutting blade being directly connected to the pivoting contact and the self-cutting branch being disposed opposite the self-cutting blade, these elements can be mounted directly on the mechanism of the differential switch. It is not necessary, for example, to use the housing of the differential switch to support these elements, which makes it possible not to depend on the dimensional tolerances or shape variations of an element attached to the mechanism, such as than the case.
  • the arrangement of the conductive branch extending in a direction transverse to the axis of rotation of the pivoting contact allows not only to take advantage of the pivoting of the contact to perform the self-cutting function, but also allows to take advantage of this pivoting in a manner almost independent of the position variation of the axis of rotation.
  • the axis of rotation of the pivoting contact will tend to move along a direction substantially parallel to the self-cutting branch, which will have little effect on the contact between the self-cutting blade and the self-cutting branch since this contact essentially depends on the position of the self-cutting blade with respect to said axis of rotation to which it is linked.
  • the pivoting contact further comprises a protruding spacer and adapted to lift the autocoupure branch when the pivoting contact is in the open position.
  • the spacer may be a tab of insulating material disposed transversely to the self-cutting branch.
  • This spacer makes it possible to increase the distance between the self-cutting branch and the self-cutting blade when the pivoting contact is in the open position, which ensures better insulation between these two parts and makes it possible to be even less dependent on manufacturing tolerances and deformations of the differential switch.
  • the spacer may comprise a notch adapted to guide the self-cutting branch.
  • the spacer and the self-cutting blade are arranged face to face and on either side of the axis of rotation of the pivoting contact.
  • This arrangement allows the chopper blade and the chopper branch to cooperate with each other so that when the chopper blade moves away from the chopper branch, the spacer moves up and when the chopper blade gets closer to the branch of the autocenter, the spacer loosens it.
  • the effects of these two elements thus accumulate advantageously.
  • the differential switch may further comprise a first stop finger disposed in the path of the self-cutting branch and adapted to limit the lifting thereof. Similarly, it may also include a second stop finger disposed vis-à-vis the first stop finger and the autocoupure branch can be maintained between the first stop finger and the second stop finger.
  • test contactor is thus produced in an economical and reliable manner.
  • the pusher spring and the chopper branch can be made in one piece, the number of elements participating in the test circuit being thereby greatly reduced.
  • the pivoting contact can be mounted on a pivoting support, said support being made of insulating material and having a projecting tongue forming the spacer.
  • the movable contact may be connected to a conductive contact spring blade which has a projecting portion forming the self-cutting blade.
  • the contacts 1, 2 are biased by an opening spring 3 so that their position at rest is the open position.
  • the movable contact 2 comprises a key member 4 intended to be positioned against a similar key member 5 belonging to the fixed contact 1, when the movable contact 2 is in its closed position.
  • the contact member 4 of the movable contact 2 is mounted in an insulating support 6 and wedged by a contact spring-blade 7, the latter also performing the function of self-cutting blade as explained below.
  • the insulating support 6 is pivotally mounted about an axis 8 to give the moving contact the degree of freedom necessary to occupy its closed positions ( Figures 1 and 2 ) and openness ( Figures 3 and 4 ).
  • the insulating support 6 further comprises a tongue 14 protruding vis-à-vis the spring-contact blade 7, these two elements 7, 14 extending in a direction transverse to the axis 8 and being arranged on the side and the tongue 14 has, on its upper part, a notch 19 provided for cooperation with a self-cutting branch 10.
  • lever 9 to be accessible from the outside so that the user can handle it. It controls the mechanism of the differential switch and has two positions corresponding to the two positions of the movable contact 2 of the figures 1 and 3 .
  • a single piece comprising a self-cutting branch 10 and a push spring 11 is disposed on the mechanism so that the self-cutting branch extends to the top of the insulating support 6, transversely to the axis 8.
  • the autocuture branch 10 is further held in place between two stop fingers 12, 13 attached to a fixed portion of the differential switch (not shown).
  • a pusher spring 11 formed of a helical winding and a projecting branch 15 disposed opposite a conductive key 16.
  • This conductive button 16 is intended to be connected to a terminal of the test resistor (not shown) whose other terminal is connected to a pole of the differential switch.
  • test button 17 is further provided to cooperate with the projecting limb 15.
  • the test button is intended to be slidably held by the housing (not shown) of the differential switch to be able to occupy a rest position in which it does not urge the protruding limb 15 and an operating position in which it pushes (under the action of the user) the limb protruding against the key 16.
  • FIG 5 uses the same elements of Figures 1 to 4 with, in addition, a second pair of contacts 18 simultaneously controlled contacts 1, 2 described above, which is common for a differential switch.
  • the tongue 14 is away from the autocoupure branch 10 while the cutter blade 7 is positioned against the autocoupure branch 10.
  • the holding of the latter by the stop fingers 12, 13 allows to take advantage of its elasticity to ensure good electrical contact with the self-cutting blade 7.
  • the self-cutting function is therefore not activated and the action on the test button 17 effectively implements the test function.
  • the tongue 14 is then held against the autocoupure branch 10 and raises it, while the autocutter blade 7 is away.
  • the distance between the chopper blade 7 and the chopper branch 10 depends on the distance between the tongue 14 (and therefore between the axis 8) and the stop fingers 12, 13.
  • the self-cutting function is thus activated, implying that even if pressure is applied to the test button 17 to make contact between the branch 15 and the key 16, the electrical continuity of the test circuit will not be established.
  • the invention is not limited to the examples described and shown, particularly with regard to the arrangement of the conductive pad 16 and the pusher spring 11.

Abstract

The switch has an automatic power cut-off conductive branch (10) that extends along a direction transversal to a rotating axle (8) of a rotating contact (2). An automatic power cut-off conductive blade (7) connected to the contact is placed relative to the branch. The blade is placed such that it is placed against and spaced apart from the branch when the contact is in closed and open positions, respectively.

Description

L'invention concerne le domaine de la protection des installations électriques et des personnes.The invention relates to the field of protection of electrical installations and people.

Elle concerne plus particulièrement un interrupteur différentiel muni d'un circuit de test destiné à s'assurer du bon fonctionnement de l'interrupteur différentiel.It relates more particularly to a differential switch provided with a test circuit for ensuring the proper operation of the differential switch.

Les interrupteurs différentiels sont des dispositifs coupe-circuit aptes à se déclencher automatiquement pour ouvrir un circuit électrique lorsque celui-ci présente un courant de fuite.The differential switches are circuit breakers able to trigger automatically to open an electrical circuit when it has a leakage current.

En effet, dans le cas où, au sein d'un circuit électrique à protéger, un appareil présente un défaut entraînant la mise à la terre de la phase du circuit, un courant de fuite est créé en ce sens qu'une partie du courant électrique circulant normalement dans le circuit est déviée vers la terre.Indeed, in the case where, within an electrical circuit to be protected, an apparatus has a defect causing the circuit phase to be grounded, a leakage current is created in that a part of the current normally flowing in the circuit is deflected to earth.

Pour des raisons évidentes de sécurité, il est nécessaire, et souvent légalement obligatoire, de détecter la présence d'un tel courant de fuite et de couper le circuit électrique en conséquence. Cette tâche est avantageusement remplie par un interrupteur différentielFor obvious safety reasons, it is necessary, and often legally mandatory, to detect the presence of such a leakage current and cut the electrical circuit accordingly. This task is advantageously performed by a differential switch

Généralement, dans un tel interrupteur différentiel, des conducteurs reliés au circuit électrique à protéger sont entourés par une bobine d'induction et, lorsque l'intensité du courant circulant dans un sens est différente de l'intensité du courant circulant dans l'autre sens (ce qui révèle la présence d'un courant de fuite sur le circuit électrique à protéger), un courant induit est créé dans la bobine et permet d'alimenter un actionneur qui déclenche le mécanisme avec pour conséquence l'ouverture d'une paire de contacts de puissance qui sectionnent au moins un pôle du circuit.Generally, in such a differential switch, conductors connected to the electrical circuit to be protected are surrounded by an induction coil and, when the intensity of the current flowing in one direction is different from the intensity of the current flowing in the other direction. (which reveals the presence of a leakage current on the electrical circuit to be protected), an induced current is created in the coil and allows to supply an actuator which triggers the mechanism with the consequence of opening a pair of power contacts which cut at least one pole of the circuit.

Par ailleurs, les interrupteurs différentiels comportent généralement un circuit de test qui permet de simuler la présence d'un courant de fuite et de vérifier ainsi le bon déclenchement de l'interrupteur différentiel.In addition, the differential switches generally comprise a test circuit that makes it possible to simulate the presence of a leakage current and thus to check the correct tripping of the differential switch.

Le principe couramment employé pour simuler un tel courant de fuite consiste à créer au sein de l'interrupteur différentiel un circuit de dérivation comportant une résistance dont l'une des bornes est reliée à un pôle du circuit électrique à protéger d'un côté de la bobine d'induction, et dont l'autre borne est reliée à un autre pôle du circuit électrique à protéger, de l'autre côté de la bobine d'induction. Un courant de fuite simulé, dépendant de la valeur de la résistance, est ainsi créé.The principle commonly used to simulate such a leakage current consists in creating, within the differential switch, a bypass circuit comprising a resistor, one of whose terminals is connected to a pole of the circuit. electrical to protect on one side of the induction coil, and the other terminal is connected to another pole of the electrical circuit to be protected on the other side of the induction coil. A simulated leakage current, depending on the value of the resistance, is thus created.

Ce circuit de dérivation est maintenu ouvert par un contacteur de test, par exemple du type interrupteur à poussoir, qui est accessible depuis le boîtier de l'interrupteur différentiel pour qu'un utilisateur puisse mettre en oeuvre la fonction test.This branch circuit is kept open by a test switch, for example of the push switch type, which is accessible from the differential switch housing for a user to implement the test function.

De plus, pour plus de sécurité, il est avantageux de prévoir un mécanisme visant à inhiber l'action du contacteur de test lorsque l'interrupteur différentiel a été déclenché.In addition, for greater safety, it is advantageous to provide a mechanism for inhibiting the action of the test contactor when the differential switch has been triggered.

En effet, une pression sur le contacteur de test alors que l'interrupteur différentiel est déclenché conduit à relier les bornes des appareils du circuit électrique à protéger aux bornes de la résistance de test, ce qui présente un danger notamment si ces appareils peuvent emmagasiner de l'énergie comme c'est le cas par exemple d'un téléviseur.Indeed, a pressure on the test contactor while the differential switch is triggered leads to connect the terminals of the devices of the electrical circuit to be protected across the test resistor, which presents a danger especially if these devices can store energy as is the case for example of a TV.

Une telle inhibition de l'action du circuit de test est couramment dénommée "autocoupure".Such an inhibition of the action of the test circuit is commonly referred to as "self-cutting".

On connaît du document EP 0 165 008 un tel dispositif de test dans lequel l'inhibition de l'interrupteur poussoir de test est réalisée par un blocage mécanique de ce poussoir, ce blocage intervenant lorsque l'interrupteur différentiel a été déclenché.Document is known EP 0 165 008 such a test device in which the inhibition of the test push switch is performed by a mechanical blocking of this pusher, this blocking occurring when the differential switch has been triggered.

Par ailleurs, le document EP 0 456 586 décrit un circuit de test destiné à un déclencheur différentiel et comportant différents ressorts, l'un de ces ressorts coopérant avec une pièce de transmission du mécanisme de commande du déclencheur de sorte à ouvrir le circuit de test lorsque le déclencheur différentiel a été actionné.In addition, the document EP 0 456 586 discloses a test circuit for a differential release and having different springs, one of these springs cooperating with a transmission part of the actuating mechanism of the release so as to open the test circuit when the differential release has been actuated.

De même, le document EP 0 295 167 décrit un ensemble de test pour appareil électrique différentiel de protection. L'ensemble de test comporte une lame conductrice à deux branches, l'une des branches assurant la fonction de l'interrupteur poussoir de test et l'autre branche assurant l'autocoupure en étant écartée de sa position de contact par un élément du mécanisme d'ouverture de contacts qui est destiné à ouvrir le circuit électrique à protéger. Finalement, le document GB 2026244 A décrit un interrupteur différentiel selon le préambule de la revendication 1.Similarly, the document EP 0 295 167 describes a test set for differential electrical protection apparatus. The test assembly comprises a conductive blade with two branches, one of the branches providing the function of the test push switch and the other branch ensuring the self-cutting. being separated from its contact position by an element of the contact opening mechanism which is intended to open the electrical circuit to be protected. Finally, the document GB 2026244 A discloses a differential switch according to the preamble of claim 1.

L'invention vise à améliorer un tel interrupteur différentiel muni d'un circuit de test notamment en ce qui concerne la fonction d'autocoupure.The aim of the invention is to improve such a differential switch provided with a test circuit, particularly with regard to the self-cutting function.

Elle propose à cet effet un interrupteur différentiel selon la revendication 1.It proposes for this purpose a differential switch according to claim 1.

Les éléments permettant de réaliser la fonction d'autocoupure d'un tel interrupteur différentiel sont directement liés aux éléments permettant de réaliser la fonction d'ouverture du circuit électrique à protéger.The elements for performing the self-cutting function of such a differential switch are directly related to the elements for performing the function of opening the electrical circuit to be protected.

En effet, la lame d'autocoupure étant directement reliée au contact pivotant et la branche d'autocoupure étant disposée en regard de la lame d'autocoupure, ces éléments peuvent être montés directement sur le mécanisme de l'interrupteur différentiel. II n'est pas nécessaire, par exemple, de faire appel au boîtier de l'interrupteur différentiel pour soutenir ces éléments, ce qui permet de ne pas dépendre des tolérances dimensionnelles ou des variations de forme d'un élément rapporté sur le mécanisme, tel que le boîtier.Indeed, the self-cutting blade being directly connected to the pivoting contact and the self-cutting branch being disposed opposite the self-cutting blade, these elements can be mounted directly on the mechanism of the differential switch. It is not necessary, for example, to use the housing of the differential switch to support these elements, which makes it possible not to depend on the dimensional tolerances or shape variations of an element attached to the mechanism, such as than the case.

Par ailleurs, la disposition de la branche conductrice s'étendant selon une direction transversale à l'axe de rotation du contact pivotant permet non seulement de mettre à profit le pivotement du contact pour réaliser la fonction d'autocoupure, mais permet aussi de mettre à profit ce pivotement d'une manière quasi indépendante de la variation de position de l'axe de rotation.Furthermore, the arrangement of the conductive branch extending in a direction transverse to the axis of rotation of the pivoting contact allows not only to take advantage of the pivoting of the contact to perform the self-cutting function, but also allows to take advantage of this pivoting in a manner almost independent of the position variation of the axis of rotation.

Lorsque les éléments constituant le mécanisme de l'interrupteur différentiel auront tendance à se déformer, par exemple sous l'effet du fluage ou sous l'effet de l'humidité, l'axe de rotation du contact pivotant tendra à se déplacer le long d'une direction sensiblement parallèle à la branche d'autocoupure, ce qui influera peu sur le contact entre la lame d'autocoupure et la branche d'autocoupure puisque ce contact dépend essentiellement de la position de la lame d'autocoupure par rapport audit axe de rotation auquel elle est liée.When the elements constituting the mechanism of the differential switch will tend to deform, for example under the effect of creep or under the effect of moisture, the axis of rotation of the pivoting contact will tend to move along a direction substantially parallel to the self-cutting branch, which will have little effect on the contact between the self-cutting blade and the self-cutting branch since this contact essentially depends on the position of the self-cutting blade with respect to said axis of rotation to which it is linked.

Le contact pivotant comporte en outre une pièce d'écartement saillante et adaptée à soulever la branche d'autocoupure lorsque le contact pivotant est en position ouverte. La pièce d'écartement peut être une languette de matériau isolant disposée transversalement à la branche d'autocoupure.The pivoting contact further comprises a protruding spacer and adapted to lift the autocoupure branch when the pivoting contact is in the open position. The spacer may be a tab of insulating material disposed transversely to the self-cutting branch.

Cette pièce d'écartement permet d'augmenter la distance entre la branche d'autocoupure et la lame d'autocoupure lorsque le contact pivotant est en position d'ouverture, ce qui assure une meilleure isolation entre ces deux pièces et permet d'être encore moins dépendant des tolérances de fabrication et des déformations de l'interrupteur différentiel.This spacer makes it possible to increase the distance between the self-cutting branch and the self-cutting blade when the pivoting contact is in the open position, which ensures better insulation between these two parts and makes it possible to be even less dependent on manufacturing tolerances and deformations of the differential switch.

Pour assurer un bon positionnement de la branche d'autocoupure, la pièce d'écartement peut comporter une encoche adaptée à guider la branche d'autocoupure.To ensure proper positioning of the self-cutting branch, the spacer may comprise a notch adapted to guide the self-cutting branch.

La pièce d'écartement et la lame d'autocoupure sont disposées face à face et de part et d'autre de l'axe de rotation du contact pivotant.The spacer and the self-cutting blade are arranged face to face and on either side of the axis of rotation of the pivoting contact.

Cette disposition permet à la lame d'autocoupure et la branche d'autocoupure de coopérer mutuellement de telle sorte que, lorsque la lame d'autocoupure s'éloigne de la branche d'autocoupure, la pièce d'écartement soulève celle-ci et, lorsque la lame d'autocoupure se rapproche de la branche d'autocoupure, la pièce d'écartement relâche celle-ci. Les effets de ces deux éléments se cumulent ainsi avantageusement.This arrangement allows the chopper blade and the chopper branch to cooperate with each other so that when the chopper blade moves away from the chopper branch, the spacer moves up and when the chopper blade gets closer to the branch of the autocenter, the spacer loosens it. The effects of these two elements thus accumulate advantageously.

Par ailleurs, l'interrupteur différentiel peut comporter en outre un premier doigt d'arrêt disposé sur le trajet de la branche d'autocoupure et adapté à limiter le soulèvement de celle-ci. De même, il peut également comporter un deuxième doigt d'arrêt disposé en vis-à-vis du premier doigt d'arrêt et la branche d'autocoupure peut être maintenue entre le premier doigt d'arrêt et le deuxième doigt d'arrêt.Furthermore, the differential switch may further comprise a first stop finger disposed in the path of the self-cutting branch and adapted to limit the lifting thereof. Similarly, it may also include a second stop finger disposed vis-à-vis the first stop finger and the autocoupure branch can be maintained between the first stop finger and the second stop finger.

Ces doigts permettent un maintien efficace de la branche d'autocoupure pour assurer un bon contact électrique lorsque la lame d'autocoupure vient se placer contre la branche d'autocoupure.These fingers allow effective maintenance of the autocoupure branch to ensure good electrical contact when the self-cutting blade is placed against the self-cutting branch.

Selon une caractéristique préférée, le contacteur de test comporte :

  • un bouton de test admettant une position de repos et une position d'actionnement ;
  • un ressort de poussoir relié à la branche d'autocoupure et disposé en vis-à-vis d'une touche conductrice
le ressort de poussoir étant commandé par le bouton de test de sorte que, lorsque le bouton test est en position de repos, le ressort est écarté de la touche et, lorsque le bouton test est en position d'actionnement, le ressort est en contact avec la touche.According to a preferred characteristic, the test contactor comprises:
  • a test button having a rest position and an actuating position;
  • a push spring connected to the self-cutting branch and arranged opposite a conductive key
the push spring being controlled by the test button so that, when the test button is in the rest position, the spring is removed from the key and, when the test button is in the actuating position, the spring is in contact with the key.

Le contacteur de test est ainsi réalisé d'une manière économique et fiable.The test contactor is thus produced in an economical and reliable manner.

Le ressort de poussoir et la branche d'autocoupure peuvent être faits d'une seule pièce, le nombre d'éléments participant au circuit de test étant de cette manière considérablement réduit.The pusher spring and the chopper branch can be made in one piece, the number of elements participating in the test circuit being thereby greatly reduced.

Pour des raisons de commodité de réalisation, le contact pivotant peut être monté sur un support pivotant, ledit support étant en matériau isolant et comportant une languette en saillie formant la pièce d'écartement. De même, le contact mobile peut être relié à une lame-ressort de contact conductrice qui comporte une portion en saillie formant la lame d'autocoupure.For the sake of convenience, the pivoting contact can be mounted on a pivoting support, said support being made of insulating material and having a projecting tongue forming the spacer. Similarly, the movable contact may be connected to a conductive contact spring blade which has a projecting portion forming the self-cutting blade.

D'autres caractéristiques et avantages de l'invention apparaissent à la lumière de la description qui va suivre d'un mode de réalisation préféré donné à titre d'exemple non limitatif, description faite en référence aux dessins annexés dans lesquels:

  • la figure 1 est une vue en perspective d'un ensemble comportant une manette, un contact fixe et un contact mobile portant une lame d'autocoupure, ainsi qu'une pièce formant ressort de poussoir et branche d'autocoupure, le contact mobile étant en position de fermeture ;
  • la figure 2 est une vue de côté correspondant à la figure 1 ;
  • la figure 3 est une vue similaire à la figure 1, le contact mobile étant en position d'ouverture ;
  • la figure 4 est une vue de côté correspondant à la figure 3 ;
  • la figure 5 est une vue correspondant à une vue de gauche de la figure 4, cette vue comportant des éléments supplémentaires de l'interrupteur différentiel : une deuxième paire de contacts et un bouton de test commandant le ressort de contact.
Other features and advantages of the invention appear in the light of the description which follows of a preferred embodiment given by way of non-limiting example, description made with reference to the accompanying drawings in which:
  • the figure 1 is a perspective view of an assembly comprising a handle, a fixed contact and a movable contact carrying a cutting blade, and a piece forming a pusher spring and autocoupure branch, the movable contact being in the closed position ;
  • the figure 2 is a side view corresponding to the figure 1 ;
  • the figure 3 is a view similar to the figure 1 the moving contact being in the open position;
  • the figure 4 is a side view corresponding to the figure 3 ;
  • the figure 5 is a view corresponding to a left view of the figure 4 this view having additional elements of the differential switch: a second pair of contacts and a test button controlling the contact spring.

Sur les figures 1 à 4 sont représentés certains des éléments constituant le circuit de test d'un interrupteur différentiel, ces éléments étant vus dans la position qu'ils occupent normalement au sein de l'interrupteur différentiel, bien que le reste du mécanisme n'ait pas été représenté pour des raisons de clarté.On the Figures 1 to 4 are represented some of the elements constituting the test circuit of a differential switch, these elements being seen in the position they normally occupy within the differential switch, although the rest of the mechanism has not been shown for reasons for clarity.

Sur ces figures sont visibles un contact fixe 1 et un contact mobile 2, ces pièces étant destinées à ouvrir ou fermer le circuit électrique à protéger selon la commande de l'interrupteur différentiel.In these figures are visible a fixed contact 1 and a movable contact 2, these parts being intended to open or close the electrical circuit to be protected according to the control of the differential switch.

Le fonctionnement d'un interrupteur différentiel étant bien connu de l'homme du métier, il ne sera pas décrit en détail ici, de même que les éléments correspondants n'ont pas été représentés. Notons simplement que le contact mobile 2 est commandé pour s'écarter du contact fixe 1 (position d'ouverture) en cas de défaut électrique.The operation of a differential switch being well known to those skilled in the art, it will not be described in detail here, just as the corresponding elements have not been shown. Note simply that the movable contact 2 is controlled to move away from the fixed contact 1 (open position) in the event of an electrical fault.

Les contacts 1, 2 sont sollicités par un ressort d'ouverture 3 pour que leur position au repos soit la position d'ouverture.The contacts 1, 2 are biased by an opening spring 3 so that their position at rest is the open position.

Le contact mobile 2 comporte un organe de touche 4 destiné à venir se positionner contre un organe de touche 5 similaire appartenant au contact fixe 1, lorsque le contact mobile 2 est dans sa position de fermeture.The movable contact 2 comprises a key member 4 intended to be positioned against a similar key member 5 belonging to the fixed contact 1, when the movable contact 2 is in its closed position.

L'organe de touche 4 du contact mobile 2 est monté dans un support isolant 6 et calé par une lame-ressort de contact 7, cette dernière assurant également la fonction de lame d'autocoupure comme exposé plus loin.The contact member 4 of the movable contact 2 is mounted in an insulating support 6 and wedged by a contact spring-blade 7, the latter also performing the function of self-cutting blade as explained below.

Le support isolant 6 est monté pivotant autour d'un axe 8 pour donner au contact mobile le degré de liberté nécessaire pour occuper ses positions de fermeture (figures 1 et 2) et d'ouverture (figures 3 et 4).The insulating support 6 is pivotally mounted about an axis 8 to give the moving contact the degree of freedom necessary to occupy its closed positions ( Figures 1 and 2 ) and openness ( Figures 3 and 4 ).

Le support isolant 6 comporte en outre une languette 14 saillante en vis-à-vis de la lame-ressort de contact 7, ces deux éléments 7, 14 s'étendant selon une direction transversale à l'axe 8 et étant disposés de part et d'autre de l'axe 8. La languette 14 comporte, sur sa partie supérieure, une encoche 19 prévue pour la coopération avec une branche d'autocoupure 10.The insulating support 6 further comprises a tongue 14 protruding vis-à-vis the spring-contact blade 7, these two elements 7, 14 extending in a direction transverse to the axis 8 and being arranged on the side and the tongue 14 has, on its upper part, a notch 19 provided for cooperation with a self-cutting branch 10.

Sur les figures 1 à 5 est également représentée une manette 9 destinée à être accessible depuis l'extérieur pour que l'utilisateur puisse la manipuler. Elle commande le mécanisme de l'interrupteur différentiel et comporte deux positions correspondant aux deux positions du contact mobile 2 des figures 1 et 3.On the Figures 1 to 5 is also shown a lever 9 to be accessible from the outside so that the user can handle it. It controls the mechanism of the differential switch and has two positions corresponding to the two positions of the movable contact 2 of the figures 1 and 3 .

Une pièce unique comportant une branche d'autocoupure 10 et un ressort de poussoir 11 est disposée sur le mécanisme de sorte que la branche d'autocoupure s'étende jusqu'au-dessus du support isolant 6, transversalement à l'axe 8.A single piece comprising a self-cutting branch 10 and a push spring 11 is disposed on the mechanism so that the self-cutting branch extends to the top of the insulating support 6, transversely to the axis 8.

La branche d'autocoupure 10 est de plus maintenue en place entre deux doigts d'arrêt 12, 13 rattachés à une partie fixe de l'interrupteur différentiel (non représenté).The autocuture branch 10 is further held in place between two stop fingers 12, 13 attached to a fixed portion of the differential switch (not shown).

Par ailleurs, à cette branche d'autocoupure 10 est rattaché un ressort de poussoir 11 formé d'un enroulement hélicoïdal et d'une branche saillante 15 disposée en regard d'une touche conductrice 16.Moreover, to this autocoupure branch 10 is attached a pusher spring 11 formed of a helical winding and a projecting branch 15 disposed opposite a conductive key 16.

Cette touche conductrice 16 est destinée à être reliée à une borne de la résistance de test (non représentée) dont l'autre borne est reliée à un pôle de l'interrupteur différentiel.This conductive button 16 is intended to be connected to a terminal of the test resistor (not shown) whose other terminal is connected to a pole of the differential switch.

En référence à la figure 5, un bouton de test 17 est de plus prévu pour coopérer avec la branche saillante 15. Le bouton de test est destiné à être maintenu coulissant par le boîtier (non représenté) de l'interrupteur différentiel pour pouvoir occuper une position de repos dans laquelle il ne sollicite pas la branche saillante 15 et une position d'actionnement dans laquelle il pousse (sous l'action de l'utilisateur) la branche saillante contre la touche 16.With reference to the figure 5 , a test button 17 is further provided to cooperate with the projecting limb 15. The test button is intended to be slidably held by the housing (not shown) of the differential switch to be able to occupy a rest position in which it does not urge the protruding limb 15 and an operating position in which it pushes (under the action of the user) the limb protruding against the key 16.

Cette figure 5 reprend les mêmes éléments des figures 1 à 4 avec, en plus, une deuxième paire de contacts 18 commandés simultanément aux contacts 1, 2 décrits précédemment, ce qui est courant pour un interrupteur différentiel.This figure 5 uses the same elements of Figures 1 to 4 with, in addition, a second pair of contacts 18 simultaneously controlled contacts 1, 2 described above, which is common for a differential switch.

Dans la position des figures 1 et 2, l'interrupteur différentiel est en position enclenchée, le contact mobile 2 étant en position de fermeture.In the position of Figures 1 and 2 , the differential switch is in the engaged position, the movable contact 2 being in the closed position.

Ainsi, de par la disposition de la languette 14 et de la lame d'autocoupure 7, la languette 14 est à l'écart de la branche d'autocoupure 10 tandis que la lame d'autcoupure 7 est positionnée contre la branche d'autocoupure 10. Le maintien de cette dernière par les doigts d'arrêt 12, 13 permet de mettre à profit son élasticité pour garantir un bon contact électrique avec la lame d'autocoupure 7.Thus, by the arrangement of the tongue 14 and the cut-off blade 7, the tongue 14 is away from the autocoupure branch 10 while the cutter blade 7 is positioned against the autocoupure branch 10. The holding of the latter by the stop fingers 12, 13 allows to take advantage of its elasticity to ensure good electrical contact with the self-cutting blade 7.

Sur ces figures 1 et 2, la branche saillante 15 est maintenue contre la touche conductrice 16, ce qui correspond à une action de l'utilisateur sur le bouton de test 17, bien que ce dernier n'ait pas été représenté sur ces figures pour des raisons de clarté.On these Figures 1 and 2 the protruding limb 15 is held against the conductive key 16, which corresponds to a user action on the test button 17, although the latter has not been shown in these figures for the sake of clarity.

Dans cette configuration, une continuité électrique est assurée entre le contact fixe 1 (et donc l'un des pôles de l'interrupteur différentiel) et la touche conductrice 16 (et donc un autre pôle de l'interrupteur différentiel), par l'intermédiaire de la résistance de test.In this configuration, an electrical continuity is ensured between the fixed contact 1 (and therefore one of the poles of the differential switch) and the conductive button 16 (and therefore another pole of the differential switch), via test resistance.

La fonction d'autocoupure n'est donc pas activée et l'action sur le bouton de test 17 met effectivement en oeuvre la fonction test.The self-cutting function is therefore not activated and the action on the test button 17 effectively implements the test function.

Dans le cas des figures 3 et 4, en revanche, l'interrupteur différentiel est en position déclenchée, le contact mobile 2 étant par conséquent en position d'ouverture.In the case of Figures 3 and 4 on the other hand, the differential switch is in the tripped position, the movable contact 2 therefore being in the open position.

La languette 14 est alors maintenue contre la branche d'autocoupure 10 et la soulève, tandis que la lame d'autocoupure 7 en est à l'écart.The tongue 14 is then held against the autocoupure branch 10 and raises it, while the autocutter blade 7 is away.

La distance séparant la lame d'autocoupure 7 de la branche d'autocoupure 10 dépend de la distance entre la languette 14 (et par conséquent entre l'axe 8) et les doigts d'arrêt 12, 13.The distance between the chopper blade 7 and the chopper branch 10 depends on the distance between the tongue 14 (and therefore between the axis 8) and the stop fingers 12, 13.

La fonction d'autocoupure est ainsi activée impliquant que même en cas de pression sur le bouton de test 17 pour établir le contact entre la branche 15 et la touche 16, la continuité électrique du circuit de test ne sera pas établie.The self-cutting function is thus activated, implying that even if pressure is applied to the test button 17 to make contact between the branch 15 and the key 16, the electrical continuity of the test circuit will not be established.

Plus généralement, l'invention ne se limite pas aux exemples décrits et représentés, notamment en ce qui concerne l'agencement de la touche conductrice 16 et du ressort de poussoir 11.More generally, the invention is not limited to the examples described and shown, particularly with regard to the arrangement of the conductive pad 16 and the pusher spring 11.

Claims (9)

  1. A residual current circuit breaker comprising:
    - a fixed power contact (1) and a pivotable power contact (2) which can adopt a closure position in which it is disposed against the fixed contact (1) and an open position in which it is spaced from the fixed contact (1);
    - a test switch (15, 16, 17);
    - an automatic interruption conductive arm (10) connected to a terminal of the test switch (15, 16, 17) and extending in a transverse direction with respect to the axis of rotation (8) of the pivotable contact (2); and
    - a projecting spacer portion (14) carried by the pivotable contact (2);
    characterised in that it further comprises an automatic interruption conductive blade (7) connected to said pivotable contact (2) and arranged facing the automatic interruption arm (10) in such a way that when the pivotable contact (2) is in the closure position the automatic interruption blade (7) is disposed against the automatic interruption arm (10) and when the pivotable contact (2) is in the open position the automatic interruption blade (7) is spaced from the automatic interruption arm (10);
    the spacer portion (14) being adapted to lift the automatic interruption arm (10) when the pivotable contact (2) is in the open position, the spacer portion and the automation interruption blade (7) being disposed in mutually facing relationship on respective sides of the axis of rotation (8) of the pivotable contact (2).
  2. A residual current circuit breaker according to claim 1 characterised in that the spacer portion (14) is a tongue portion of insulating material disposed transversely with respect to the automatic interruption arm (10).
  3. A residual current circuit breaker according to claim 2 characterised in that the spacer portion (14) comprises a notch (19) adapted to guide the automatic interruption arm (10).
  4. A residual current circuit breaker according to one of claims 1 to 3 characterised in that it further comprises a first stop finger (12) disposed on the path of movement of the automatic interruption arm (10) and adapted to limit the lifting movement thereof.
  5. A residual current circuit breaker according to claim 4 characterised in that it further comprises a second stop finger (13) disposed in facing relationship with the first stop finger (12) and that the automatic interruption arm (10) is held between the first stop finger (12) and the second stop finger (13).
  6. A residual current circuit breaker according to one of claims 1 to 5 characterised in that the test switch comprises:
    - a test button (17) capable of adopting a rest position and an actuation position;
    - a thrust member spring (11, 15) connected to the automatic interruption arm (10) and disposed in facing relationship with a conductive contact (16),
    - the thrust member spring (11, 15) being controlled by the test button (17) in such a way that when the test button (17) is in the rest position the spring (11, 15) is spaced from the contact (16) and when the test button (17) is in the actuation position the spring (11, 15) is in contact with the contact (16).
  7. A residual current circuit breaker according to claim 6 characterised in that the thrust member spring (11, 15) and the automatic interruption arm (10) are made in one piece.
  8. A residual current circuit breaker according to one of claims 1 to 7 characterised in that the pivotable contact (2) is mounted on a pivotable support (6), said support (6) being of insulating material and comprising a projecting tongue portion (14) forming the spacer portion.
  9. A residual current circuit breaker according to one of claims 1 to 8 characterised in that the movable contact (2) is connected to a conductive contact spring blade (17) comprising a projecting portion forming the automatic interruption blade.
EP04767737A 2003-07-21 2004-07-20 Differential switch provided with a test circuit Not-in-force EP1647041B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04767737T PL1647041T3 (en) 2003-07-21 2004-07-20 Differential switch provided with a test circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308867A FR2858108B1 (en) 2003-07-21 2003-07-21 DIFFERENTIAL SWITCH COMPRISING A TEST CIRCUIT
PCT/FR2004/001919 WO2005010905A2 (en) 2003-07-21 2004-07-20 Differential switch provided with a test circuit

Publications (2)

Publication Number Publication Date
EP1647041A2 EP1647041A2 (en) 2006-04-19
EP1647041B1 true EP1647041B1 (en) 2008-09-10

Family

ID=33560964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767737A Not-in-force EP1647041B1 (en) 2003-07-21 2004-07-20 Differential switch provided with a test circuit

Country Status (10)

Country Link
EP (1) EP1647041B1 (en)
CN (1) CN100470706C (en)
AT (1) ATE408233T1 (en)
BR (1) BRPI0412068A (en)
DE (1) DE602004016518D1 (en)
ES (1) ES2314441T3 (en)
FR (1) FR2858108B1 (en)
PL (1) PL1647041T3 (en)
RU (1) RU2346351C2 (en)
WO (1) WO2005010905A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105510818B (en) * 2015-12-30 2019-02-05 三信国际电器上海有限公司 Breaker and its experimental rig and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1992095U (en) * 1968-04-05 1968-08-22 Siemens Aktiengesellschaft, 1000 Berlin und 8000 München Residual current circuit breaker with a test device to be actuated by a test button
BE867767A (en) * 1977-04-14 1978-10-02 Ave Belli Andrea HIGH SENSITIVITY DIFFERENTIAL SWITCH
DE8702467U1 (en) * 1987-02-18 1987-04-02 Brown, Boveri & Cie Ag, 6800 Mannheim, De
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

Also Published As

Publication number Publication date
RU2006105204A (en) 2006-06-27
EP1647041A2 (en) 2006-04-19
CN1826677A (en) 2006-08-30
PL1647041T3 (en) 2009-03-31
WO2005010905A3 (en) 2005-03-24
CN100470706C (en) 2009-03-18
RU2346351C2 (en) 2009-02-10
DE602004016518D1 (en) 2008-10-23
WO2005010905A2 (en) 2005-02-03
ATE408233T1 (en) 2008-09-15
FR2858108A1 (en) 2005-01-28
FR2858108B1 (en) 2006-01-06
ES2314441T3 (en) 2009-03-16
BRPI0412068A (en) 2006-11-21

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