EP1378925B1 - Auxiliary device for controlling the opening of a circuit breaker - Google Patents

Auxiliary device for controlling the opening of a circuit breaker Download PDF

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Publication number
EP1378925B1
EP1378925B1 EP03354048.5A EP03354048A EP1378925B1 EP 1378925 B1 EP1378925 B1 EP 1378925B1 EP 03354048 A EP03354048 A EP 03354048A EP 1378925 B1 EP1378925 B1 EP 1378925B1
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EP
European Patent Office
Prior art keywords
terminals
power supply
voltage
intended
auxiliary device
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EP03354048.5A
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German (de)
French (fr)
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EP1378925A1 (en
Inventor
Joel Schneider Electric Industries SAS Fagnoul
Jean-Baptiste Schneider Elec. Ind. SAS Tallier
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/203—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition with shunt trip circuits, e.g. NC contact in an undervoltage coil circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to an auxiliary device for controlling the opening of a switchgear, for example of the circuit-breaker or switch type.
  • auxiliary opening control devices are frequently used in conjunction with switchgear, for example of the circuit-breaker or switch type, within the electrical installations. They allow to provide additional safety functions that are not provided in the cut-off device. Thus auxiliaries with minimum or maximum voltage allow to control the opening of the switchgear when the voltage applied to them passes respectively below or above a voltage threshold. Such auxiliary devices serve in particular to perform the safety opening function.
  • FIG. 1-A is schematically shown an auxiliary opening control device operating with a voltage overvoltage relay 1, commonly called release trigger.
  • the auxiliary device comprises two terminals 2 connected to a power supply, at least one pushbutton 10 open in normal use position, and a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown. as soon as the voltage applied to its terminals exceeds a predetermined threshold.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown.
  • FIG. 1-B is schematically shown an auxiliary opening control device operating with a relay undervoltage 1, commonly called undervoltage release.
  • the auxiliary device comprises two terminals 2 connected to a power supply, at least a pushbutton 10 closed in the normal use position, and a undervoltage relay 1 which sends an opening command to a switchgear, not shown, as soon as the voltage applied to its terminals becomes lower than a predetermined threshold.
  • the supply voltage is constantly applied to the terminals of the relay 1. If a plurality of push buttons 10 is used, these are connected in series and all closed in the normal use position, so that an action on one pushbuttons 10 suppress the voltage of the power supply across relay 1, which will then control the opening of the switchgear.
  • the document FR-A-2793355 discloses an auxiliary aperture control device according to the preamble of claim 1.
  • auxiliary devices with undervoltage are sensitive to variations in the mains voltage. Indeed, in the case of interruption or voltage drop of the power supply due to a mains voltage drop, the auxiliary device will control the opening of the switchgear. This situation is troublesome when the safety device must not be opened at each disturbance of the electrical network, and poses a problem of continuity of service.
  • the instantaneous undervoltage coils are sometimes replaced by delayed undervoltage coils. However, the delays are of the order of one second and do not allow to guard against cuts that can last several minutes. In addition, delays that are too long do not allow undervoltage coils to be associated with safety opening devices.
  • the invention therefore aims to overcome the drawbacks of the state of the art, so as to provide an auxiliary device for opening control of switchgear, simple and economical construction, ensuring a good continuity of service while improving safety over overvoltage devices.
  • connection terminals short-circuit the tripping means when they are connected by an electrical connection.
  • the auxiliary device comprises a plurality of impedances maintaining an identical potential across the tripping means when the connection terminals are connected by an electrical connection.
  • the auxiliary device comprises a second plurality of power supply terminals intended to be connected to an external power supply.
  • the first and second plurality of power supply terminals are intended to be respectively connected to first and second external power supplies, and have a plurality of impedances maintaining an identical potential across the terminals of the power supply means. tripping when the connection terminals are interconnected by an electrical connection and that the two pluralities of supply terminals are connected to two external power supplies that operate.
  • the plurality or pluralities of supply terminals may optionally be intended to be respectively connected to one or three phase power supplies.
  • an auxiliary device for opening control of a switchgear comprises a plurality of power supply terminals 2 intended to be connected to an external power supply, mechanical triggering means 1, an impedance 4 and terminals connection means 3 intended to be connected through one or a plurality of push buttons 10.
  • the triggering means 1 are able to send a mechanical command to a switchgear, not shown, as soon as a voltage substantially not null is present at their terminals. Only one push button 10 is shown on the Figure 2 , but the device works with any number of push buttons 10 connected in series.
  • the electrical circuit comprising the tripping means 1, the impedance 4 and the connection terminals 3 and supply 2 delivers across the tripping means 1 a zero voltage or close to zero when the connection terminals 3 are connected by an electrical connection, and a substantially non-zero voltage when the power supply terminals 2 are connected to an external power supply that operates and the electrical connection connecting the connection terminals 3 is interrupted.
  • connection terminals 3 are interconnected by one or a plurality of pushbuttons 10 which are all in the closed position.
  • the current then flows between the connection terminals 3 through the push buttons 10 by shorting the tripping means 1.
  • the voltage across the tripping means 1 is zero or very low.
  • a momentary drop in the voltage of the supply circuit will not create a voltage across the tripping means 1 which will not be triggered.
  • the return to normal of the supply circuit voltage also does not require intervention, the auxiliary device according to the invention returning to its mode of operation. current operation as soon as the power supply connected to terminals 2 returns to its nominal voltage. The auxiliary device thus ensures an optimal continuity of service.
  • the impedance 4 is integrated in the device according to the invention so as to be certain that the current flowing through the device will not be too important.
  • the tripping means 1 comprise an electromagnet.
  • the electromagnet is de-energized to allow proper operation with low power.
  • Optional protection means such as diodes may also be added as shown in FIGS. Figures 2-A or 2-B , to reduce AC consumption, or to protect the device in the event of a cabling error.
  • the diodes are particularly adapted to a particular embodiment using a de-energizing electromagnet in the tripping means 1.
  • the rectifying diode 5 is justified by the polarized nature of the electromagnet desensitization, and the diode of freewheel 6 improves the operation of the device and taking into account the inductive nature of the electromagnet.
  • the Figure 2-B is a variant of the figure 2-A , comprising additional protection means 7 which protect the device in case of bad wiring, in particular if the power supply is connected to the connection terminals 3.
  • the auxiliary device according to the invention can easily be mounted downstream of the controlled switchgear, while this requires a complex additional device for a lack of voltage trigger as shown in Figure in. Indeed, in the absence of power supply, the undervoltage relay will send a permanent trip command. It is therefore necessary to supply the relay undervoltage to remove the trip order to be able to reset the device. This is why the undervoltage release can not be placed downstream of the switchgear unless an additional device is used to temporarily supply the undervoltage relay in order to be able to switch on the auxiliary device. On the contrary, the auxiliary device according to the invention does not send a permanent trigger command if it is not powered. Therefore, a re-engagement is possible without the device is fed beforehand. The auxiliary device can be placed downstream of the switchgear without the need for additional temporary power supply devices.
  • the Figure 3 represents another device according to the invention for using a single or dual power supply.
  • the device of the Figure 3 has a first plurality of power supply terminals 2 for connection to a first power supply, and a second plurality of power supply terminals 12 for connection to a second power supply, and a plurality of impedances 4.
  • Terminals 2 and 12 can be connected to a single power supply.
  • the system has an operation equivalent to that of the auxiliary device represented in FIG. figure 2 , but the operating principle differs slightly in that the one or more pushbuttons 10 do not short circuit trigger 1.
  • the plurality of impedances 4 is specially chosen so that in current operation it maintain an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. Any actuation of the or a push button 10 interrupts the electrical connection between the connection terminals 3 and causes the sending of a mechanical command by the triggering means 1, a voltage appearing at their terminals because of the imbalance that is created .
  • the auxiliary device according to the invention shown in figure 3 can also be connected to two separate power sources. This redundancy of the power supply provides greater security compared to a single-power mode, since it makes it possible to activate the tripping means 1 in the event of a fault on one of the supply circuits, while a single power system becomes inoperative in the event of failure of the single power supply circuit.
  • the two external power supplies 2 and 12 operate, the plurality of impedances 4 maintaining an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. say when the pushbutton or buttons are in the closed position. Thus, there is no voltage across the tripping means.
  • the actuation of the or a push button 10 or a failure of one of the supply circuits causes an imbalance of potentials and reveals a voltage across the tripping means 1, which are then triggered and send a command to the switchgear, not shown.
  • the auxiliary device according to the invention shown in figure 3 also makes it easy to switch from a simple power mode to a dual power mode (and vice versa), depending on the different security options chosen, without changing auxiliary device.
  • auxiliary devices operating with single-phase power supplies are shown.
  • the figures 4 and 5 are examples of auxiliary devices according to the invention, operating respectively with a single and a double three-phase power supply.
  • the number of supply terminals 2 and 12 differs from the auxiliary devices shown on the figures 2 and 3 but the operating principles remain the same.
  • FIG. 5-A a device according to the invention corresponding to that shown in FIG. figure 3-A , but working with three-phase power supplies.
  • the two feed lines that are crossed correspond to the same phase.
  • the relay 1 is triggered and sends an opening command signal.

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Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention est relative à un dispositif auxiliaire de commande d'ouverture d'un appareillage de coupure, par exemple de type disjoncteur ou interrupteur.The invention relates to an auxiliary device for controlling the opening of a switchgear, for example of the circuit-breaker or switch type.

ETAT DE LA TECHNIQUESTATE OF THE ART

Des dispositifs auxiliaires de commande d'ouverture sont fréquemment utilisés en association avec des appareillages de coupure, par exemple de type disjoncteur ou interrupteur, au sein des installations électriques. Ils permettent d'assurer des fonctions de sécurité supplémentaires qui ne sont pas prévues dans le dispositif de coupure. Ainsi des auxiliaires à minimum ou à maximum de tension permettent de commander l'ouverture de l'appareillage de coupure lorsque la tension qui leur est appliquée passe respectivement au dessous ou au-dessus d'un seuil de tension. De tels dispositifs auxiliaires servent notamment à réaliser la fonction d'ouverture de sécurité.Auxiliary opening control devices are frequently used in conjunction with switchgear, for example of the circuit-breaker or switch type, within the electrical installations. They allow to provide additional safety functions that are not provided in the cut-off device. Thus auxiliaries with minimum or maximum voltage allow to control the opening of the switchgear when the voltage applied to them passes respectively below or above a voltage threshold. Such auxiliary devices serve in particular to perform the safety opening function.

Sur la figure 1-A est représenté schématiquement un dispositif auxiliaire de commande d'ouverture fonctionnant avec un relais à maximum de tension 1, communément appelé déclencheur à émission. Le dispositif auxiliaire comprend deux bornes 2 reliées à une alimentation, au minimum un bouton poussoir 10 ouvert en position normale d'utilisation, et un relais à maximum de tension 1 qui envoie une commande mécanique d'ouverture à un appareillage de coupure, non représenté, dès que la tension appliquée à ses bornes dépasse un seuil prédéterminé. Dans les cas où plusieurs boutons poussoirs 10 sont utilisés, ceux ci sont montés en parallèle et sont tous ouverts en position normale d'utilisation. Ainsi, une action sur l'un des boutons poussoirs 10 permet d'appliquer la tension de l'alimentation aux bornes du relais 1, lequel va alors commander l'ouverture de l'appareillage de coupure. Néanmoins, en cas de défaillance de l'alimentation toute action sur l'un des boutons poussoirs 10 sera sans effet, ce qui pose un problème de sécurité. Il en sera de même en cas de coupure du circuit du bouton poussoir 10 qui est activé.On the figure 1-A is schematically shown an auxiliary opening control device operating with a voltage overvoltage relay 1, commonly called release trigger. The auxiliary device comprises two terminals 2 connected to a power supply, at least one pushbutton 10 open in normal use position, and a voltage overvoltage relay 1 which sends a mechanical opening command to a switchgear, not shown. as soon as the voltage applied to its terminals exceeds a predetermined threshold. In cases where several push buttons 10 are used, they are mounted in parallel and are all open in the normal position of use. Thus, an action on one of the push buttons 10 makes it possible to apply the voltage of the power supply to the terminals of the relay 1, which will then control the opening of the switchgear. Nevertheless, in case of failure of the power supply, any action on one of the push buttons 10 will have no effect, which poses a security problem. It will be the same in case of cutout of the circuit of the push button 10 which is activated.

Sur la figure 1-B est représenté schématiquement un dispositif auxiliaire de commande d'ouverture fonctionnant avec un relais à minimum de tension 1, communément appelé déclencheur à manque de tension. Le dispositif auxiliaire comprend deux bornes 2 reliées à une alimentation, au minimum un bouton poussoir 10 fermé en position normale d'utilisation, et un relais à minimum de tension 1 qui envoie une commande d'ouverture à un appareillage de coupure, non représenté, dès que la tension appliquée à ses bornes devient inférieure à un seuil prédéterminé. La tension d'alimentation est constamment appliquée aux bornes du relais 1. Si une pluralité de boutons poussoirs 10 est utilisée, ceux-ci sont montés en série et tous fermés en position normale d'utilisation, afin qu'une action sur l'un des boutons poussoirs 10 supprime la tension de l'alimentation aux bornes du relais 1, lequel va alors commander l'ouverture de l'appareillage de coupure.On the figure 1-B is schematically shown an auxiliary opening control device operating with a relay undervoltage 1, commonly called undervoltage release. The auxiliary device comprises two terminals 2 connected to a power supply, at least a pushbutton 10 closed in the normal use position, and a undervoltage relay 1 which sends an opening command to a switchgear, not shown, as soon as the voltage applied to its terminals becomes lower than a predetermined threshold. The supply voltage is constantly applied to the terminals of the relay 1. If a plurality of push buttons 10 is used, these are connected in series and all closed in the normal use position, so that an action on one pushbuttons 10 suppress the voltage of the power supply across relay 1, which will then control the opening of the switchgear.

Le document FR-A-2793355 décrit un dispositif auxiliaire de commande d'ouverture selon le préambule de la revendication 1.The document FR-A-2793355 discloses an auxiliary aperture control device according to the preamble of claim 1.

Le problème de sécurité posé par les dispositifs à émission est résolu par les dispositifs auxiliaires à minimum de tension puisque la commande d'ouverture est envoyée en cas de défaillance de l'alimentation ou en cas de coupure de l'un des boutons poussoir 10. Mais les dispositifs auxiliaires à minimum de tension sont sensibles aux variations de la tension du réseau. En effet, dans le cas d'interruption ou de baisse de tension de l'alimentation liée à une chute de tension du réseau, le dispositif auxiliaire va commander l'ouverture de l'appareillage de coupure. Cette situation est gênante lorsque le dispositif de sécurité ne doit pas être ouvert à chaque perturbation du réseau électrique, et pose un problème de continuité de service. Pour éviter de commander l'ouverture lors de très courtes perturbations transitoires, les bobines à minimum de tension instantanées sont parfois remplacées par des bobines à minimum de tension retardées. Cependant, les temporisations sont de l'ordre de la seconde et ne permettent pas de se prémunir contre des coupures qui peuvent durer plusieurs minutes. De plus, des temporisations trop longues ne permettent pas aux bobines à minimum de tension d'être associées à des dispositifs d'ouverture de sécurité.The safety problem posed by the emission devices is solved by the auxiliary devices with undervoltage since the opening command is sent in the event of a failure of the power supply or in the event of the interruption of one of the pushbuttons 10. But auxiliary devices with undervoltage are sensitive to variations in the mains voltage. Indeed, in the case of interruption or voltage drop of the power supply due to a mains voltage drop, the auxiliary device will control the opening of the switchgear. This situation is troublesome when the safety device must not be opened at each disturbance of the electrical network, and poses a problem of continuity of service. To avoid controlling the opening during very short transient disturbances, the instantaneous undervoltage coils are sometimes replaced by delayed undervoltage coils. However, the delays are of the order of one second and do not allow to guard against cuts that can last several minutes. In addition, delays that are too long do not allow undervoltage coils to be associated with safety opening devices.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise donc à remédier aux inconvénients de l'état de la technique, de manière à proposer un dispositif auxiliaire de commande d'ouverture d'un appareillage de coupure, de construction simple et économique, assurant une bonne continuité de service tout en améliorant la sécurité par rapport aux dispositifs à maximum de tension.The invention therefore aims to overcome the drawbacks of the state of the art, so as to provide an auxiliary device for opening control of switchgear, simple and economical construction, ensuring a good continuity of service while improving safety over overvoltage devices.

A cet effet, l'invention a pour objet un dispositif auxiliaire de commande d'ouverture destiné à commander l'ouverture d'un appareillage de coupure selon la revendication 1 et comportant notamment :

  • une pluralité de bornes d'alimentation destinées à être connectées à une première alimentation externe
  • des bornes de connexion destinées à être reliées entre elles par au moins un bouton poussoir,
  • des moyens de déclenchement aptes à envoyer une commande mécanique, et
  • au moins une impédance ;
  • les moyens de déclenchement envoyant une commande mécanique vers l'appareillage de coupure lorsqu'une tension sensiblement non nulle est présente à leurs bornes, le circuit électrique comportant les moyens de déclenchement, la ou les impédances et les bornes de connexion et d'alimentation délivrant aux bornes des moyens de déclenchement :
    • une tension nulle ou proche de zéro lorsque les bornes de connexion sont reliées par une liaison électrique,
    • une tension sensiblement non nulle lorsque les bornes d'alimentation sont connectées à une alimentation qui fonctionne et que la liaison électrique reliant les bornes de connexion est interrompue.
For this purpose, the subject of the invention is an auxiliary opening control device intended to control the opening of a switchgear according to claim 1 and comprising in particular:
  • a plurality of power terminals for connection to a first external power supply
  • connection terminals intended to be interconnected by at least one push button,
  • triggering means capable of sending a mechanical command, and
  • at least one impedance;
  • the tripping means sending a mechanical command to the switchgear when a substantially non-zero voltage is present at their terminals, the electric circuit comprising the tripping means, the impedance or impedances and the connection and supply terminals delivering at the terminals of the tripping means:
    • a zero or near zero voltage when the connection terminals are connected by an electrical connection,
    • a substantially non-zero voltage when the supply terminals are connected to a power supply which operates and the electrical connection connecting the connection terminals is interrupted.

Selon l'invention, les bornes de connexion court-circuitent les moyens de déclenchement lorsqu'elles sont reliées par une liaison électrique.According to the invention, the connection terminals short-circuit the tripping means when they are connected by an electrical connection.

Alternativement, le dispositif auxiliaire comprend une pluralité d'impédances maintenant un potentiel identique aux bornes des moyens de déclenchement lorsque les bornes de connexion sont reliées par une liaison électrique.Alternatively, the auxiliary device comprises a plurality of impedances maintaining an identical potential across the tripping means when the connection terminals are connected by an electrical connection.

Avantageusement, le dispositif auxiliaire comprend une seconde pluralité de bornes d'alimentation destinées à être connectées à une alimentation externe. Optionnellement, les première et deuxième pluralité de bornes d'alimentation sont destinées à être connectées respectivement à une première et une seconde alimentations externes, et comporte une pluralité d'impédances maintenant un potentiel identique aux bornes des moyens de déclenchement lorsque les bornes de connexion sont reliées entre elles par une liaison électrique et que les deux pluralités de bornes d'alimentation sont reliées à deux alimentations externes qui fonctionnent.Advantageously, the auxiliary device comprises a second plurality of power supply terminals intended to be connected to an external power supply. Optionally, the first and second plurality of power supply terminals are intended to be respectively connected to first and second external power supplies, and have a plurality of impedances maintaining an identical potential across the terminals of the power supply means. tripping when the connection terminals are interconnected by an electrical connection and that the two pluralities of supply terminals are connected to two external power supplies that operate.

La ou les pluralités de bornes d'alimentation peuvent être optionnellement destinées à être connectées respectivement à une ou des alimentations triphasées.The plurality or pluralities of supply terminals may optionally be intended to be respectively connected to one or three phase power supplies.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés sur lesquels :

  • la figure 1-A représente un dispositif auxiliaire de l'état de la technique, dit «déclencheur à émission» ;
  • la figure 1-B représente un dispositif auxiliaire de l'état de la technique, dit «déclencheur à manque de tension» ;
  • les figures 2 représentent un dispositif auxiliaire selon l'invention ;
  • les figures 3 représentent un autre dispositif auxiliaire selon l'invention, fonctionnant avec une simple ou une double alimentation ;
  • la figure 4 représente un dispositif auxiliaire selon l'invention avec une simple alimentation triphasée ;
  • les figures 5 représentent un dispositif auxiliaire selon l'invention avec une double alimentation triphasée.
Other advantages and features will emerge more clearly from the following description of a particular embodiment of the invention, given by way of non-limiting example, and represented in the accompanying drawings in which:
  • the figure 1-A represents an auxiliary device of the state of the art, called "release trigger";
  • the figure 1-B represents an auxiliary device of the state of the art, called "undervoltage release";
  • the figures 2 represent an auxiliary device according to the invention;
  • the figures 3 represent another auxiliary device according to the invention, operating with a single or a double power supply;
  • the figure 4 represents an auxiliary device according to the invention with a simple three-phase power supply;
  • the figures 5 represent an auxiliary device according to the invention with a double three-phase power supply.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

En référence à la figure 2, un dispositif auxiliaire de commande d'ouverture d'un appareillage de coupure selon l'invention comprend une pluralité de bornes d'alimentation 2 destinées à être connectées à une alimentation externe, des moyens de déclenchement mécanique 1, une impédance 4 et des bornes de connexion 3 destinées à être reliées au travers d'un ou d'une pluralité de bouton poussoirs 10. Les moyens de déclenchement 1 sont aptes à envoyer une commande mécanique vers un appareillage de coupure, non représenté, dès qu'une tension sensiblement non nulle est présente à leurs bornes. Un seul bouton poussoir 10 est représenté sur la Figure 2, mais le dispositif fonctionne avec un nombre quelconque de boutons poussoirs 10 montés en série.With reference to the figure 2 , an auxiliary device for opening control of a switchgear according to the invention comprises a plurality of power supply terminals 2 intended to be connected to an external power supply, mechanical triggering means 1, an impedance 4 and terminals connection means 3 intended to be connected through one or a plurality of push buttons 10. The triggering means 1 are able to send a mechanical command to a switchgear, not shown, as soon as a voltage substantially not null is present at their terminals. Only one push button 10 is shown on the Figure 2 , but the device works with any number of push buttons 10 connected in series.

Selon l'invention, le circuit électrique comprenant les moyens de déclenchement 1, l'impédance 4 et les bornes de connexion 3 et d'alimentation 2 délivre aux bornes des moyens de déclenchement 1 une tension nulle ou proche de zéro lorsque les bornes de connexion 3 sont reliées par une liaison électrique, et une tension sensiblement non nulle lorsque les bornes d'alimentation 2 sont connectées à une alimentation externe qui fonctionne et que la liaison électrique reliant les bornes de connexion 3 est interrompue.According to the invention, the electrical circuit comprising the tripping means 1, the impedance 4 and the connection terminals 3 and supply 2 delivers across the tripping means 1 a zero voltage or close to zero when the connection terminals 3 are connected by an electrical connection, and a substantially non-zero voltage when the power supply terminals 2 are connected to an external power supply that operates and the electrical connection connecting the connection terminals 3 is interrupted.

Ainsi, lorsque le dispositif selon l'invention représenté à la figure 2 est dans un mode de fonctionnement courant, une alimentation externe qui fonctionne est connectée aux bornes d'alimentation 2, et les bornes de connexion 3 sont reliées entre elles par un ou une pluralité de boutons poussoirs 10 qui sont tous en position fermée. Le courant circule alors entre les bornes de connexion 3 au travers des boutons poussoir 10 en court-circuitant les moyens de déclenchement 1. Ainsi, dans le mode de fonctionnement courant, la tension aux bornes des moyens de déclenchement 1 est nulle ou très faible.Thus, when the device according to the invention shown in figure 2 is in a current operating mode, a functioning external power supply is connected to the power supply terminals 2, and the connection terminals 3 are interconnected by one or a plurality of pushbuttons 10 which are all in the closed position. The current then flows between the connection terminals 3 through the push buttons 10 by shorting the tripping means 1. Thus, in the current operating mode, the voltage across the tripping means 1 is zero or very low.

Dès que l'un des boutons poussoirs 10 est actionné, le courant circulant entre les bornes de connexion 3 est interrompu, ce qui augmente brusquement la tension aux bornes des moyens de déclenchement 1, lesquels envoient alors une commande mécanique vers l'appareillage de coupure non représenté.As soon as one of the push buttons 10 is actuated, the current flowing between the connection terminals 3 is interrupted, which suddenly increases the voltage across the trip means 1, which then sends a mechanical command to the switchgear not shown.

Une coupure accidentelle du circuit d'un bouton poussoir 10 aura le même effet qu'une action sur le bouton poussoir 10 : une tension apparaît aux bornes des moyens de déclenchement 1 qui envoient alors une commande à l'appareillage de coupure, ce qui permet d'avoir une sécurité positive et améliore la sécurité par rapport à un déclencheur à émission.An accidental breaking of the circuit of a push button 10 will have the same effect as an action on the pushbutton 10: a voltage appears across the tripping means 1 which then sends a command to the switchgear, which allows to have a positive security and improves security compared to a release trigger.

Une baisse momentanée de la tension du circuit d'alimentation ne créera pas de tension aux bornes des moyens de déclenchement 1 qui ne se déclencheront donc pas. Le retour à la normale de la tension du circuit d'alimentation ne nécessite pas non plus d'intervention, le dispositif auxiliaire selon l'invention revenant à son mode de fonctionnement courant dès que l'alimentation reliée aux bornes 2 retrouve sa tension nominale. Le dispositif auxiliaire assure donc une continuité de service optimale.A momentary drop in the voltage of the supply circuit will not create a voltage across the tripping means 1 which will not be triggered. The return to normal of the supply circuit voltage also does not require intervention, the auxiliary device according to the invention returning to its mode of operation. current operation as soon as the power supply connected to terminals 2 returns to its nominal voltage. The auxiliary device thus ensures an optimal continuity of service.

L'impédance 4 est intégrée au dispositif selon l'invention de façon à être certain que le courant traversant le dispositif ne sera pas trop important. Typiquement, les moyens de déclenchement 1 comprennent un électro-aimant. Préférentiellement, l'électro-aimant est à désexcitation afin de permettre un fonctionnement correct avec une faible puissance. Des moyens de protection optionnels tels que des diodes peuvent également être ajoutés comme représenté aux figures 2-A ou 2-B, afin de réduire la consommation en alternatif, ou de protéger le dispositif en cas d'erreur de câblage.The impedance 4 is integrated in the device according to the invention so as to be certain that the current flowing through the device will not be too important. Typically, the tripping means 1 comprise an electromagnet. Preferably, the electromagnet is de-energized to allow proper operation with low power. Optional protection means such as diodes may also be added as shown in FIGS. Figures 2-A or 2-B , to reduce AC consumption, or to protect the device in the event of a cabling error.

Ainsi sur la figure 2-A, les diodes sont particulièrement adaptées à un mode de réalisation particulier utilisant un électro-aimant à désexcitation dans les moyens de déclenchement 1. La diode de redressement 5 se justifie par le caractère polarisé de l'électro-aimant à désensibilisation, et la diode de roue libre 6 améliore le fonctionnement du dispositif et prenant en compte le caractère selfique de l'électro-aimant. La figure 2-B est une variante de la figure 2-A, comportant des moyens de protections supplémentaires 7 qui permettent de protéger le dispositif en cas de mauvais câblage, en particulier si l'alimentation est connectée aux bornes de connexion 3.So on the figure 2-A , the diodes are particularly adapted to a particular embodiment using a de-energizing electromagnet in the tripping means 1. The rectifying diode 5 is justified by the polarized nature of the electromagnet desensitization, and the diode of freewheel 6 improves the operation of the device and taking into account the inductive nature of the electromagnet. The Figure 2-B is a variant of the figure 2-A , comprising additional protection means 7 which protect the device in case of bad wiring, in particular if the power supply is connected to the connection terminals 3.

Par ailleurs, le dispositif auxiliaire selon l'invention peut sans difficulté être monté en aval de l'appareillage de coupure commandé, alors que cela nécessite un dispositif additionnel complexe pour un déclencheur à manque de tension tel que représenté à la figure in. En effet, en l'absence d'alimentation, le relais à minimum de tension va envoyer un ordre de déclenchement permanent. Il faut donc nécessairement alimenter le relais à minimum de tension pour faire disparaître l'ordre de déclenchement afin de pouvoir réenclencher le dispositif. C'est pourquoi le déclencheur à manque de tension ne peut pas être placé en aval de l'appareillage de coupure à moins d'utiliser un dispositif additionnel destiné à alimenter temporairement le relais à minimum de tension pour pouvoir réenclencher le dispositif auxiliaire. Au contraire, le dispositif auxiliaire selon l'invention n'envoie pas un ordre permanent de déclenchement s'il n'est pas alimenté. Par conséquent, un ré-enclenchement est possible sans que le dispositif soit alimenté au préalable. Le dispositif auxiliaire peut donc être placé en aval de l'appareillage de coupure sans nécessiter la présence de dispositifs d'alimentation temporaires additionnels.Furthermore, the auxiliary device according to the invention can easily be mounted downstream of the controlled switchgear, while this requires a complex additional device for a lack of voltage trigger as shown in Figure in. Indeed, in the absence of power supply, the undervoltage relay will send a permanent trip command. It is therefore necessary to supply the relay undervoltage to remove the trip order to be able to reset the device. This is why the undervoltage release can not be placed downstream of the switchgear unless an additional device is used to temporarily supply the undervoltage relay in order to be able to switch on the auxiliary device. On the contrary, the auxiliary device according to the invention does not send a permanent trigger command if it is not powered. Therefore, a re-engagement is possible without the device is fed beforehand. The auxiliary device can be placed downstream of the switchgear without the need for additional temporary power supply devices.

La Figure 3 représente un autre dispositif selon l'invention permettant d'utiliser au choix une simple ou une double alimentation. Le dispositif de la Figure 3 comporte une première pluralité de bornes d'alimentation 2 destinées à être connectées à une première alimentation, et une seconde pluralité de bornes d'alimentation 12 destinées à être reliées à une seconde alimentation, et une pluralité d'impédances 4.The Figure 3 represents another device according to the invention for using a single or dual power supply. The device of the Figure 3 has a first plurality of power supply terminals 2 for connection to a first power supply, and a second plurality of power supply terminals 12 for connection to a second power supply, and a plurality of impedances 4.

Les bornes 2 et 12 peuvent être reliées à une seule et unique alimentation. Dans ce cas, le système a un fonctionnement équivalent à celui du dispositif auxiliaire représenté à la figure 2, mais le principe de fonctionnement diffère légèrement en ce sens que le ou les boutons poussoirs 10 ne court-circuitent pas les moyens de déclenchement 1. Selon l'invention, la pluralité d'impédances 4 est spécialement choisie pour qu'en fonctionnement courant elle maintienne un potentiel identique aux bornes des moyens de déclenchement 1 lorsque les bornes de connexion 3 sont reliées par une liaison électrique. Tout actionnement du ou d'un bouton poussoir 10 interrompt la liaison électrique entre les bornes de connexion 3 et entraîne l'envoi d'une commande mécanique par les moyens de déclenchement 1, une tension apparaissant à leurs bornes du fait du déséquilibre qui est créé.Terminals 2 and 12 can be connected to a single power supply. In this case, the system has an operation equivalent to that of the auxiliary device represented in FIG. figure 2 , but the operating principle differs slightly in that the one or more pushbuttons 10 do not short circuit trigger 1. According to the invention, the plurality of impedances 4 is specially chosen so that in current operation it maintain an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. Any actuation of the or a push button 10 interrupts the electrical connection between the connection terminals 3 and causes the sending of a mechanical command by the triggering means 1, a voltage appearing at their terminals because of the imbalance that is created .

Une coupure accidentelle du circuit d'un bouton poussoir 10 aura le même effet qu'une action sur le bouton poussoir 10 : une tension apparaît aux bornes des moyens de déclenchement 1 qui envoient alors une commande à l'appareillage de coupure, ce qui permet d'avoir une sécurité positive et améliore la sécurité par rapport à un déclencheur à émission.An accidental breaking of the circuit of a push button 10 will have the same effect as an action on the pushbutton 10: a voltage appears across the tripping means 1 which then sends a command to the switchgear, which allows to have a positive security and improves security compared to a release trigger.

Le dispositif auxiliaire selon l'invention représenté à la figure 3 peut également être connecté à deux sources d'alimentation distinctes. Cette redondance de l'alimentation procure une sécurité accrue par rapport à un mode à simple alimentation, car elle permet d'activer les moyens de déclenchement 1 dans le cas d'une défaillance sur l'un des circuits d'alimentation, alors qu'un système à simple alimentation devient inopérant en cas de défaillance de l'unique circuit d'alimentation.The auxiliary device according to the invention shown in figure 3 can also be connected to two separate power sources. This redundancy of the power supply provides greater security compared to a single-power mode, since it makes it possible to activate the tripping means 1 in the event of a fault on one of the supply circuits, while a single power system becomes inoperative in the event of failure of the single power supply circuit.

Avec le montage représenté à la Figure 3-A , le déclenchement est également assuré en cas de disparition totale, c'est à dire simultanément aux deux bornes, de l'une des deux alimentations 2 et 12, ce qui procure une sécurité supplémentaire.With the assembly shown in Figure 3-A , tripping is also ensured in the event of total disappearance, ie simultaneously to the two terminals, of one of the two power supplies 2 and 12, which provides additional security.

Dans un mode de fonctionnement courant, les deux alimentations 2 et 12 externes fonctionnent, la pluralité d'impédances 4 maintenant un potentiel identique aux bornes des moyens de déclenchement 1 lorsque les bornes de connexion 3 sont reliées par une liaison électrique, c'est à dire lorsque le ou les boutons poussoirs sont en position fermée. Ainsi il n'y a pas de tension aux bornes des moyens de déclenchement. L'actionnement du ou d'un bouton poussoir 10 ou une défaillance de l'un des circuits d'alimentation provoque un déséquilibre de potentiels et fait apparaître une tension aux bornes des moyens de déclenchement 1, lesquels se déclenchent alors et envoient une commande vers l'appareillage de coupure, non représenté.In a current operating mode, the two external power supplies 2 and 12 operate, the plurality of impedances 4 maintaining an identical potential across the tripping means 1 when the connection terminals 3 are connected by an electrical connection. say when the pushbutton or buttons are in the closed position. Thus, there is no voltage across the tripping means. The actuation of the or a push button 10 or a failure of one of the supply circuits causes an imbalance of potentials and reveals a voltage across the tripping means 1, which are then triggered and send a command to the switchgear, not shown.

La continuité de service du dispositif selon l'invention représenté à la figure 3 reste optimale quand celui-ci est alimenté par deux alimentations externes distinctes, car toute défaillance générale de la tension de secteur fera disparaître simultanément les deux tensions d'alimentation aux bornes 2 et 12, ce qui ne provoquera pas de déséquilibre, ne fera pas apparaître de tension aux bornes des moyens de déclenchement 1 et ne provoquera donc pas leur activation.The continuity of service of the device according to the invention shown in FIG. figure 3 remains optimal when it is powered by two separate external power supplies, because any general failure of the mains voltage will simultaneously remove the two power supply voltages at terminals 2 and 12, which will not cause imbalance, will not appear voltage across the tripping means 1 and therefore will not cause their activation.

Le dispositif auxiliaire selon l'invention représenté à la figure 3 permet également de passer aisément d'un mode simple alimentation à un mode double alimentation (et inversement), selon les différentes options de sécurité choisies, sans changer de dispositif auxiliaire.The auxiliary device according to the invention shown in figure 3 also makes it easy to switch from a simple power mode to a dual power mode (and vice versa), depending on the different security options chosen, without changing auxiliary device.

Sur les figures 2 et 3 sont représentés des dispositifs auxiliaires fonctionnant avec des alimentations monophasées. Les figures 4 et 5 représentent des exemples de dispositifs auxiliaires selon l'invention, fonctionnant respectivement avec une simple et une double alimentation triphasée. Le nombre de bornes d'alimentation 2 et 12 diffère par rapport aux dispositifs auxiliaires représentés sur les figures 2 et 3, mais les principes de fonctionnement restent les mêmes.On the figures 2 and 3 auxiliary devices operating with single-phase power supplies are shown. The figures 4 and 5 are examples of auxiliary devices according to the invention, operating respectively with a single and a double three-phase power supply. The number of supply terminals 2 and 12 differs from the auxiliary devices shown on the figures 2 and 3 but the operating principles remain the same.

Sur la figure 5-A est représenté un dispositif selon l'invention correspondant à celui représenté à la figure 3-A, mais fonctionnant avec des alimentations triphasées. Les deux lignes d'alimentation qui sont croisées correspondent à la même phase. En cas de défaillance totale de l'un des systèmes d'alimentation, c'est à dire une défaillance simultanées des trois phases, le relais 1 se déclenche et envoie un signal de commande d'ouverture.On the figure 5-A a device according to the invention corresponding to that shown in FIG. figure 3-A , but working with three-phase power supplies. The two feed lines that are crossed correspond to the same phase. In case of total failure of one of the supply systems, ie a simultaneous failure of the three phases, the relay 1 is triggered and sends an opening command signal.

Claims (5)

  1. Auxiliary opening control device intended to control the opening of a circuit-breaking apparatus, comprising
    - a plurality of power supply terminals (2) intended to be connected to a first external power supply,
    - connection terminals (3) intended to be linked together by at least one push button (10),
    - trip means (1) suitable for sending a mechanical command, and
    - at least one impedance (4),
    - the trip means (1) send a mechanical command to the circuit-breaking apparatus when a substantially non-zero voltage is present at their terminals,
    - the electrical circuit comprising the trip means (1), the impedance or impedances (4) and the connection (3) and power supply (2) terminals delivers, to the terminals of the trip means (1):
    - a voltage that is zero or close to zero when the connection terminals (3) are linked by an electrical link, and
    - a substantially non-zero voltage when the power supply terminals (2) are connected to an external power supply which is operating and the electrical link linking the connection terminals (3) is interrupted,
    characterized in that the connection terminals (3) short-circuit the trip means (1) when they are linked together by an electrical link.
  2. Auxiliary opening control device according to Claim 1, characterized in that it comprises a plurality of impedances (4) maintaining an identical potential at the two terminals of the trip means (1) when the connection terminals (3) are linked together by an electrical link.
  3. Auxiliary opening control device according to Claim 1, further comprising a second plurality of power supply terminals (12) intended to be connected to an external power supply.
  4. Auxiliary opening control device according to Claim 3, characterized in that the first and the second pluralities of power supply terminals (2, 12) are intended to be connected respectively to a first and a second power supply distinct from one another, the plurality of impedances (4) maintaining an identical potential at the terminals of the trip means (1) when the connection terminals (3) are linked together by an electrical link and the two pluralities of power supply terminals (2, 12) are connected to two external power supplies which are operating.
  5. Auxiliary opening control device according to any one of the preceding claims, characterized in that the plurality or pluralities of power supply terminals (2, 12) are intended to be connected respectively to one or more three-phase power supplies.
EP03354048.5A 2002-07-03 2003-06-02 Auxiliary device for controlling the opening of a circuit breaker Expired - Lifetime EP1378925B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0208308A FR2842020B1 (en) 2002-07-03 2002-07-03 AUXILIARY DEVICE FOR CONTROLLING THE OPENING OF A SWITCHING APPARATUS
FR0208308 2002-07-03

Publications (2)

Publication Number Publication Date
EP1378925A1 EP1378925A1 (en) 2004-01-07
EP1378925B1 true EP1378925B1 (en) 2016-03-30

Family

ID=27589628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03354048.5A Expired - Lifetime EP1378925B1 (en) 2002-07-03 2003-06-02 Auxiliary device for controlling the opening of a circuit breaker

Country Status (4)

Country Link
EP (1) EP1378925B1 (en)
ES (1) ES2569055T3 (en)
FR (1) FR2842020B1 (en)
NO (1) NO324223B1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353016A (en) * 1963-01-11 1964-02-21 Forges Ateliers Const Electr Shunt resistors for safety devices
FR2793355B1 (en) * 1999-05-06 2001-06-15 Schneider Electric Ind Sa PROTECTION DEVICE WITH SAFETY OPENING CONTROL

Also Published As

Publication number Publication date
NO20032866D0 (en) 2003-06-20
NO324223B1 (en) 2007-09-10
FR2842020A1 (en) 2004-01-09
NO20032866L (en) 2004-01-05
ES2569055T3 (en) 2016-05-06
EP1378925A1 (en) 2004-01-07
FR2842020B1 (en) 2004-08-13

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