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EP0911851A1 - Control device for an electromechanical contactor-circuit breaker type device with separable power contacts - Google Patents

Control device for an electromechanical contactor-circuit breaker type device with separable power contacts Download PDF

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Publication number
EP0911851A1
EP0911851A1 EP98402622A EP98402622A EP0911851A1 EP 0911851 A1 EP0911851 A1 EP 0911851A1 EP 98402622 A EP98402622 A EP 98402622A EP 98402622 A EP98402622 A EP 98402622A EP 0911851 A1 EP0911851 A1 EP 0911851A1
Authority
EP
European Patent Office
Prior art keywords
coil
control
hand
switch
capacity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98402622A
Other languages
German (de)
French (fr)
Other versions
EP0911851B1 (en
Inventor
Gilles Baurand
Jean-Christophe Cuny
Alain Gousset
Philippe Guibert
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric SE, Schneider Electric Industries SAS filed Critical Schneider Electric SE
Publication of EP0911851A1 publication Critical patent/EP0911851A1/en
Application granted granted Critical
Publication of EP0911851B1 publication Critical patent/EP0911851B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • 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
    • 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
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
    • H01H47/043—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current making use of an energy accumulator
    • 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
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/226—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil for bistable relays

Definitions

  • the present invention relates to a control device for an apparatus for electromechanical contactor-circuit breaker type with separable power contacts, comprising an electromagnet provided with a control coil for voluntary closing and opening of contacts, a coil electromagnet for opening the contacts in the event of an electrical fault and an energy source for the coils.
  • an electromechanical contactor device requires a substantial current consumption when its control electromagnet must close the contacts; on the other hand, current consumption should be minimized when the contacts remain in the closed state.
  • control coil and trip coil as simple as possible an electromechanical contactor-breaker device of the aforementioned type.
  • the object of the invention is to minimize the consumption of a device control for electromechanical contactor-circuit breaker device, while simplifying the construction of this device.
  • the voluntary control electromagnet is of the bistable type and the tripping electromagnet is of the monostable type;
  • a bridge of switches switches in H is associated with the control coil and a trip switch is arranged in series with the coil trigger;
  • the power source of the closing control coil is an external voltage source, while the energy source of the control coil and the opening release coil is constituted by a capacity mounted in parallel to the coils.
  • a control circuit solicits on the one hand the switches bridge switches for direct or reverse flow of current switch in the control coil, and on the other hand the switch trip, depending on the current measured by sensors respectively associated with the control coil and the trip coil.
  • control circuit sequentially controls the switches switches and the trip switch, so ensure priority discharge of capacity in the event of a fault trip coil.
  • a capacity opening is mounted in parallel to the control coil and to its bridge of switches and an opening capacity on fault is mounted parallel to the trip coil; the latter is connected with a share in the positive pole of the bridge and the normal opening capacity via a first diode and secondly to the positive pole of the opening capacity on fault via a second diode, the diodes being mounted in opposition with the common point of their cathodes connected to the trigger coil.
  • the current sensors are advantageously connected resistors to the switch switch deck and the trip switch so as to require only one input from the control circuit.
  • FIG. 1 is a diagram of the control device according to the invention.
  • Figure 2 shows an alternative embodiment of the device.
  • Figure 3 shows a detail of a variant.
  • the device in FIG. 1 is intended to control a contactor-circuit breaker device electromechanical with separable power contacts.
  • the device includes a bistable type electromagnet E1 provided with a coil L1 and a movable armature not shown, the maintenance of which in two extreme positions stable is ensured by permanent magnets; the device includes in addition, to ensure rapid opening of the contacts in the event of a fault electrical on at least one of the power lines controlled by the contacts, a monostable tripping electromagnet E2 which has been shown the coil L2 and which cooperates with a trigger mechanism not shown. Switching of the electromagnet E1 to one or other of its states stable is due to the passage of current through the coil L1 in one or the other meaning.
  • the control device 10 is supplied from a continuous or alternating external electric power source rectified by voltage V by two conductors 1,2 of potential high and low respectively via an on-off switch I 0 with maintained control; there is provided on the top conductor 1 a non-return diode D 0 and, optionally (see FIG. 2), a member 3 for voltage adaptation and consumption limitation; the coils L1, L2, as well as a switching capacity C1, are arranged in parallel between the conductors 1,2.
  • the member 3 makes it possible to avoid current peaks and to ensure a minimum charging time for the capacity.
  • the device has a bridge H of electronic switches associated with the coil L1. It further comprises a control circuit 12 which is supplied from of the voltage V and which controls on the one hand the switches T1-T4 of the bridge 11, on the other hand a switch T5 placed in series with the coil L2.
  • Switches T1-T4 are for example transistors placed in series with the coil L1 so that it is traversed by the current coming from the voltage source via the conductors 1,2 in one direction when the transistors T1, T4 are on and transistors T3, T2 blocked and in the other sense when T1, T4 are blocked and T3, T2 passing.
  • Each switch T1-T4 is associated with a respective recovery diode D1-D4 and with the switch T5 is associated with a recovery diode D5.
  • the bridge can be integrated in circuit 12.
  • a current sensor 13 It is intended to measure the current flowing through the coil L1 of the electromagnet bistable a current sensor 13.
  • This sensor can consist of a judiciously placed resistance; so the negative pole of the switches bottom of the bridge 11 is for example connected to a terminal of a resistor R1, thus only at one input 12c of the control circuit 12, while the other terminal of resistor R1 is connected to the negative pole of the supply voltage and thereby to the anodes of the diodes D2, D4.
  • a current sensor 14 In series with the release coil L2 is arranged a current sensor 14; this sensor can likewise be a resistance R2 for measuring the current in the trip coil, this resistor being connected to an input of the control circuit 12.
  • the control circuit 12 is connected by a connection 12a to the midpoint a voltage divider R3, R4 arranged between the conductors 1,2 to take immediately take into account the presence of voltage above a certain threshold or the voltage drop below a certain threshold and is powered by a connection 12b thanks to a capacitor C2 located between the conductors 1.2 and connected to conductor 1 via a diode D7.
  • Circuit 12 is connected by an input 12c to the current sensor 13, by an input 12d to the current sensor 14 and by outputs 12e, 12f at the control inputs transistors T1-T4 and respectively of transistor T5.
  • a connection additional 12g connected to the positive pole of the il bridge or of the Ci capacity detects the charge thereof.
  • the control circuit can be possibly able to test the load slope of the capacity Ci to determine if it is operational.
  • the negative pole of the measurement resistor R1 is connected on the one hand to the trip switch T5, on the other hand to the negative conductor 2 by the resistance of measure R2; in this way, the connection with the input 12d of the control circuit 12 can be deleted and it is enough to request a single input 12c of the circuit to ensure detection of the current in the two coils.
  • the device described operates in the following manner.
  • the capacitor C1 is charged from the external source A through a limiting resistor or other current limiting member specific to member 3 and it is the same for C2; the control circuit 12 is activated at time t 1 when it finds that the potential between Ai and A2 is greater than a determined initial threshold V1 and that C1 is charged.
  • the control circuit then closes T1 and T4, then performs a controlled series of openings and closings of T1, to circulate the desired energy in a direct direction in the coil L1 by means of current pulses; when T1 is closed, the current flows through T1, L1, T4 and R1; when T1 is open, the current flows through L1, T4, R1, D2.
  • the coil L1 does not need holding current, it is only necessary to ensure simple compensation for losses and the continuation of operation of the control circuit; if organ 3 is provided, it determines a limitation of the level of the supply current.
  • the on-off switch I 0 is opened at time t 3 ; the control circuit 12 detects on its connection 12a the drop in the supply voltage below a threshold V3, while continuing to be supplied by the capacitor C2. Circuit 12 opens switches T1 and T4 and closes switches T2 and T3 continuously or modulated. The current from the capacitor Ci thus flows in the opposite direction in the coil L1, the armature of which switches, and this results in the opening of the power contacts.
  • the value of the capacitor C1 is such that it discharges faster than C2 so that the control circuit remains operational until the contacts open.
  • circuit 12 blocks switches T2 and T3 at time t 4 .
  • the control circuit 12 When an electrical fault such as an overcurrent is noted by a current sensor associated with the power circuit, the control circuit 12 receives on its input 12c a corresponding signal; consequently, it leaves the switches T1-T4 at rest and turns on the transistor T5 so that the current of the capacitor Ci crosses the coil L2 which actuates the triggering mechanism. Then the circuit 20 turns on the transistors T2, T3 to circulate in the coil L1 a current capable of putting the control electromagnet in a state confirming the opening of the contacts: in this phase, the transistor T5 can be blocked to control the discharge level of capacity C1. The same tripping sequence can be initiated in response to an absence of current in the coil L1 following a closing of the switch I 0 .
  • the voltage V is applied in a part at the bridge in H 10 and at the capacity C1 via the diode D6 and on the other hand at a additional capacity C'1 via a diode D'6.
  • the charge of capacities C1 and C'1 is therefore carried out through the resistance of the member 3 and respectively the diode D6 and diode D'6.
  • the positive terminals of capacitors C1, C'1 are connected to the upper terminal of the L2 trip coil via two diodes in opposition D8, D9 whose common point of the cathodes is designated by B1.
  • the low potential point of the trigger branch L2, T5, R2 is designated by B2.
  • the control circuit 12 is arranged between B1 and B2. This device has the advantage of making it possible to remedy the risks of malfunction in the event of failure of one or the other capacity.
  • the control circuit 12 detects the absence of current in the coil L1 and the resistor R1, and consequently makes T5 passing ; the capacitor C'1 is discharged via the diode D9 in the tripping coil L2 to open the contacts. If the C'1 capacity is open and a fault occurs in the power circuit, for example a short circuit, the capacitor C1 replaces C'1 via the diode D8 to supply the coil L2 and open the contacts. If the capacitor C'1 short-circuits during operation of the device, the diodes D8, D9 mounted in opposition isolate the short-circuited capacity of the capacity Ci which can therefore supply the coil L2 with the necessary energy as soon as T5 is closed. It should be noted that the control circuit 12 connected to point B1 sees the largest voltages available across C1 and C'1.

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  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

Current detectors in the two circuits measure the current in the coils and switch the bridge switches as a function of the current, providing a reliable switching function.

Description

La présente invention concerne un dispositif de commande pour appareil de type contacteur-disjoncteur électromécanique à contacts de puissance séparables, comprenant un électroaimant muni d'une bobine de commande pour la fermeture et l'ouverture volontaires des contacts, un électroaimant à bobine de déclenchement pour l'ouverture des contacts en cas de défaut électrique et une source d'énergie pour les bobines.The present invention relates to a control device for an apparatus for electromechanical contactor-circuit breaker type with separable power contacts, comprising an electromagnet provided with a control coil for voluntary closing and opening of contacts, a coil electromagnet for opening the contacts in the event of an electrical fault and an energy source for the coils.

Comme on le sait, un appareil contacteur électromécanique nécessite une consommation de courant substantielle lorsque son électroaimant de commande doit fermer les contacts ; en revanche, la consommation en courant doit être réduite au minimum lorsque les contacts restent à l'état fermé.As is known, an electromechanical contactor device requires a substantial current consumption when its control electromagnet must close the contacts; on the other hand, current consumption should be minimized when the contacts remain in the closed state.

Il est d'autre part souhaitable d'alimenter et de contrôler de façon aussi simple que possible la bobine de commande et la bobine de déclenchement d'un appareil contacteur-disjoncteur électromécanique du type précité.On the other hand, it is desirable to feed and control in such a way control coil and trip coil as simple as possible an electromechanical contactor-breaker device of the aforementioned type.

L'invention a pour but de réduire au minimum la consommation d'un dispositif de commande pour appareil contacteur-disjoncteur électromécanique, tout en simplifiant la réalisation de ce dispositif.The object of the invention is to minimize the consumption of a device control for electromechanical contactor-circuit breaker device, while simplifying the construction of this device.

Selon l'invention, l'électroaimant de commande volontaire est du type bistable et l'électroaimant de déclenchement est du type monostable ; un pont d'interrupteurs commutateurs en H est associé à la bobine de commande et un interrupteur de déclenchement est disposé en série avec la bobine de déclenchement ; la source d'énergie de la bobine de commande à la fermeture est une source de tension externe, tandis que la source d'énergie de la bobine de commande et de la bobine de déclenchement à l'ouverture est constituée par une capacité montée en parallèle aux bobines.According to the invention, the voluntary control electromagnet is of the bistable type and the tripping electromagnet is of the monostable type; A bridge of switches switches in H is associated with the control coil and a trip switch is arranged in series with the coil trigger; the power source of the closing control coil is an external voltage source, while the energy source of the control coil and the opening release coil is constituted by a capacity mounted in parallel to the coils.

De préférence, un circuit de commande sollicite d'une part les interrupteurs commutateurs du pont pour faire circuler en sens direct ou inverse un courant de commutation dans la bobine de commande, et d'autre part l'interrupteur de déclenchement, en fonction du courant mesuré par des capteurs respectivement associés à la bobine de commande et à la bobine de déclenchement.Preferably, a control circuit solicits on the one hand the switches bridge switches for direct or reverse flow of current switch in the control coil, and on the other hand the switch trip, depending on the current measured by sensors respectively associated with the control coil and the trip coil.

Il est avantageux que le circuit de commande pilote séquentiellement les interrupteurs commutateurs et l'interrupteur de déclenchement, de manière à assurer en cas de défaut une décharge prioritaire de la capacité dans la bobine de déclenchement.It is advantageous that the control circuit sequentially controls the switches switches and the trip switch, so ensure priority discharge of capacity in the event of a fault trip coil.

Dans un mode d'exécution bénéficiant d'une grande sécurité, une capacité d'ouverture normale est montée en parallèle à la bobine de commande et à son pont d'interrupteurs et une capacité d'ouverture sur défaut est montée en parallèle à la bobine de déclenchement ; cette dernière est reliée d'une part au pôle positif du pont et de la capacité d'ouverture normale via une première diode et d'autre part au pôle positif de la capacité d'ouverture sur défaut via une seconde diode, les diodes étant montées en opposition avec le point commun de leurs cathodes relié à la bobine de déclenchement.In an execution mode benefiting from high security, a capacity opening is mounted in parallel to the control coil and to its bridge of switches and an opening capacity on fault is mounted parallel to the trip coil; the latter is connected with a share in the positive pole of the bridge and the normal opening capacity via a first diode and secondly to the positive pole of the opening capacity on fault via a second diode, the diodes being mounted in opposition with the common point of their cathodes connected to the trigger coil.

Les capteurs de courant sont avantageusement des résistances connectées au pont d'interrupteurs commutateurs et à l'interrupteur de déclenchement de manière à ne solliciter qu'une seule entrée du circuit de commande.The current sensors are advantageously connected resistors to the switch switch deck and the trip switch so as to require only one input from the control circuit.

La description d'un mode de réalisation non limitatif de l'invention est faite ci-après, en regard des dessins annexés.The description of a nonlimiting embodiment of the invention is made below, with reference to the accompanying drawings.

La figure 1 est un schéma du dispositif de commande conforme à l'invention.Figure 1 is a diagram of the control device according to the invention.

La figure 2 montre une variante de réalisation du dispositif.Figure 2 shows an alternative embodiment of the device.

La figure 3 représente un détail d'une variante.Figure 3 shows a detail of a variant.

Le dispositif de la figure 1 est destiné à commander un appareil contacteur-disjoncteur électromécanique à contacts de puissance séparables. Pour assurer la fermeture et l'ouverture volontaires des contacts, l'appareil comprend un électroaimant E1 de type bistable muni d'une bobine L1 et d'une armature mobile non représentée dont le maintien dans deux positions extrêmes stables est assuré par des aimants permanents ; l'appareil comprend en outre, pour assurer une ouverture rapide des contacts en cas de défaut électrique sur l'une au moins des lignes de puissance contrôlées par les contacts, un électroaimant déclencheur monostable E2 dont on a représenté la bobine L2 et qui coopère avec un mécanisme déclencheur non représenté. La commutation de l'électroaimant E1 vers l'un ou l'autre de ses états stables est due au passage du courant dans la bobine L1 dans l'un ou l'autre sens.The device in FIG. 1 is intended to control a contactor-circuit breaker device electromechanical with separable power contacts. To ensure voluntary closing and opening of contacts, the device includes a bistable type electromagnet E1 provided with a coil L1 and a movable armature not shown, the maintenance of which in two extreme positions stable is ensured by permanent magnets; the device includes in addition, to ensure rapid opening of the contacts in the event of a fault electrical on at least one of the power lines controlled by the contacts, a monostable tripping electromagnet E2 which has been shown the coil L2 and which cooperates with a trigger mechanism not shown. Switching of the electromagnet E1 to one or other of its states stable is due to the passage of current through the coil L1 in one or the other meaning.

Le dispositif de commande 10 est alimenté à partir d'une source d'énergie électrique externe continue ou alternative redressée de tension V par deux conducteurs 1,2 de potentiel respectivement haut et bas via un interrupteur marche-arrêt I0 à commande maintenue ; on prévoit sur le conducteur haut 1 une diode antiretour D0 et, de manière facultative (voir figure 2), un organe 3 d'adaptation de tension et de limitation de consommation ; les bobines L1,L2, ainsi qu'une capacité de commutation C1, sont disposées en parallèle entre les conducteurs 1,2. L'organe 3 permet d'éviter des pointes de courant et d'assurer un temps minimal de charge de la capacité.The control device 10 is supplied from a continuous or alternating external electric power source rectified by voltage V by two conductors 1,2 of potential high and low respectively via an on-off switch I 0 with maintained control; there is provided on the top conductor 1 a non-return diode D 0 and, optionally (see FIG. 2), a member 3 for voltage adaptation and consumption limitation; the coils L1, L2, as well as a switching capacity C1, are arranged in parallel between the conductors 1,2. The member 3 makes it possible to avoid current peaks and to ensure a minimum charging time for the capacity.

Pour commander la circulation du courant dans la bobine L1, le dispositif comporte un pont il d'interrupteurs électroniques en H associé à la bobine L1. Il comporte de plus un circuit de commande 12 qui est alimenté à partir de la tension V et qui commande d'une part les interrupteurs T1-T4 du pont 11, d'autre part un interrupteur T5 mis en série avec la bobine L2. Les interrupteurs T1-T4 sont par exemple des transistors placés en série avec la bobine L1 de manière que celle-ci soit parcourue par le courant provenant de la source de tension via les conducteurs 1,2 dans un sens quand les transistors T1,T4 sont passants et les transistors T3,T2 bloqués et dans l'autre sens quand T1,T4 sont bloqués et T3,T2 passants. A chaque interrupteur T1-T4 est associée une diode respective de récupération D1-D4 et à l'interrupteur T5 est associée une diode de récupération D5. Le pont il peut être intégré dans le circuit 12.To control the flow of current in the coil L1, the device has a bridge H of electronic switches associated with the coil L1. It further comprises a control circuit 12 which is supplied from of the voltage V and which controls on the one hand the switches T1-T4 of the bridge 11, on the other hand a switch T5 placed in series with the coil L2. Switches T1-T4 are for example transistors placed in series with the coil L1 so that it is traversed by the current coming from the voltage source via the conductors 1,2 in one direction when the transistors T1, T4 are on and transistors T3, T2 blocked and in the other sense when T1, T4 are blocked and T3, T2 passing. At each switch T1-T4 is associated with a respective recovery diode D1-D4 and with the switch T5 is associated with a recovery diode D5. The bridge can be integrated in circuit 12.

Il est prévu pour mesurer le courant parcourant la bobine L1 de l'électroaimant bistable un capteur de courant 13. Ce capteur peut être constitué d'une résistance judicieusement placée ; ainsi, le pôle négatif des interrupteurs bas du pont 11 est par exemple relié à une borne d'une résistance R1, ainsi qu'à une entrée 12c du circuit de commande 12, tandis que l'autre borne de la résistance R1 est connectée au pôle négatif de la tension d'alimentation et par là aux anodes des diodes D2,D4. En série avec la bobine de déclenchement L2 est disposé un capteur de courant 14 ; ce capteur peut de même être une résistance R2 de mesure du courant dans la bobine de déclenchement, cette résistance étant reliée à une entrée du circuit de commande 12.It is intended to measure the current flowing through the coil L1 of the electromagnet bistable a current sensor 13. This sensor can consist of a judiciously placed resistance; so the negative pole of the switches bottom of the bridge 11 is for example connected to a terminal of a resistor R1, thus only at one input 12c of the control circuit 12, while the other terminal of resistor R1 is connected to the negative pole of the supply voltage and thereby to the anodes of the diodes D2, D4. In series with the release coil L2 is arranged a current sensor 14; this sensor can likewise be a resistance R2 for measuring the current in the trip coil, this resistor being connected to an input of the control circuit 12.

Le circuit de commande 12 est relié par une connexion 12a au point milieu d'un diviseur de tension R3,R4 disposé entre les conducteurs 1,2 pour prendre en compte sans retard la présence de tension au-dessus d'un certain seuil ou la chute de tension au-dessous d'un certain seuil et est alimenté par une connexion 12b grâce à une capacité C2 située entre les conducteurs 1,2 et connectée au conducteur 1 via une diode D7. Le circuit 12 est connecté par une entrée 12c au capteur de courant 13, par une entrée 12d au capteur de courant 14 et par des sorties 12e, 12f aux entrées de commande des transistors T1-T4 et respectivement du transistor T5. Une connexion suplémentaire 12g reliée au pôle positif du pont il ou de la capacité Ci permet de détecter la charge de celle-ci. Le circuit de commande peut être éventuellement apte à tester la pente de charge de la capacité Ci pour déterminer si celle-ci est opérationnelle.The control circuit 12 is connected by a connection 12a to the midpoint a voltage divider R3, R4 arranged between the conductors 1,2 to take immediately take into account the presence of voltage above a certain threshold or the voltage drop below a certain threshold and is powered by a connection 12b thanks to a capacitor C2 located between the conductors 1.2 and connected to conductor 1 via a diode D7. Circuit 12 is connected by an input 12c to the current sensor 13, by an input 12d to the current sensor 14 and by outputs 12e, 12f at the control inputs transistors T1-T4 and respectively of transistor T5. A connection additional 12g connected to the positive pole of the il bridge or of the Ci capacity detects the charge thereof. The control circuit can be possibly able to test the load slope of the capacity Ci to determine if it is operational.

Dans le mode de réalisation préféré illustré sur la figure 3, le pôle négatif de la résistance de mesure R1 est connecté d'une part à l'interrupteur de déclenchement T5, d'autre part au conducteur négatif 2 par la résistance de mesure R2 ; de la sorte, la liaison avec l'entrée 12d du circuit de commande 12 peut être supprimée et il suffit de solliciter une seule entrée 12c du circuit de commande pour assurer la détection du courant dans les deux bobines.In the preferred embodiment illustrated in FIG. 3, the negative pole of the measurement resistor R1 is connected on the one hand to the trip switch T5, on the other hand to the negative conductor 2 by the resistance of measure R2; in this way, the connection with the input 12d of the control circuit 12 can be deleted and it is enough to request a single input 12c of the circuit to ensure detection of the current in the two coils.

Le dispositif décrit fonctionne de la manière suivante.The device described operates in the following manner.

Quand on ferme à l'instant t0 l'interrupteur marche-arrêt I0, la capacité C1 se charge à partir de la source externe A à travers une résistance limitatrice ou autre organe limiteur de courant propre à l'organe 3 et il en est de même pour C2 ; le circuit de commande 12 est activé à l'instant t1 quand il constate que le potentiel entre Ai et A2 est supérieur à un seuil initial V1 déterminé et que C1 est chargée. Le circuit de commande ferme alors T1 et T4, puis effectue une série contrôlée d'ouvertures et fermetures de T1, pour faire circuler l'énergie voulue en sens direct dans la bobine L1 au moyen d'impulsions de courant ; quand T1 est fermé, le courant passe dans T1,L1,T4 et R1 ; quand T1 est ouvert, le courant passe dans L1,T4,R1,D2. La décharge de C1 lors des phases d'ouverture de T1 ne se répercute pas sur C2 du fait de la présence de la diode D7. A un instant t2 déterminé par le circuit 12, celui-ci met les transistors T1-T4 au repos ; l'électroaimant, par sa nature bistable, reste maintenu dans son état enclenché, et les contacts de puissance restent fermés, tant que l'interrupteur marche-arrêt I0 reste fermé.When the on-off switch I 0 is closed at time t 0 , the capacitor C1 is charged from the external source A through a limiting resistor or other current limiting member specific to member 3 and it is the same for C2; the control circuit 12 is activated at time t 1 when it finds that the potential between Ai and A2 is greater than a determined initial threshold V1 and that C1 is charged. The control circuit then closes T1 and T4, then performs a controlled series of openings and closings of T1, to circulate the desired energy in a direct direction in the coil L1 by means of current pulses; when T1 is closed, the current flows through T1, L1, T4 and R1; when T1 is open, the current flows through L1, T4, R1, D2. The discharge of C1 during the opening phases of T1 does not affect C2 due to the presence of the diode D7. At an instant t 2 determined by the circuit 12, the latter puts the transistors T1-T4 at rest; the electromagnet, by its bistable nature, remains maintained in its engaged state, and the power contacts remain closed, as long as the on-off switch I 0 remains closed.

La bobine L1 n'ayant pas besoin de courant de maintien, il est seulement nécessaire d'assurer une simple compensation des pertes et la poursuite du fonctionnement du circuit de commande ; si l'organe 3 est prévu, il détermine une limitation du niveau du courant d'alimentation.The coil L1 does not need holding current, it is only necessary to ensure simple compensation for losses and the continuation of operation of the control circuit; if organ 3 is provided, it determines a limitation of the level of the supply current.

Pour ouvrir de manière volontaire les contacts de puissance, on ouvre à l'instant t3 l'interrupteur marche-arrêt I0 ; le circuit de commande 12 détecte sur sa connexion 12a la chute de la tension d'alimentation au -dessous d'un seuil V3, tout en continuant d'être alimenté par la capacité C2. Le circuit 12 ouvre les interrupteurs T1 et T4 et ferme de manière continue ou modulée les interrupteurs T2 et T3. Le courant issu de la capacité Ci circule ainsi en sens inverse dans la bobine L1, dont l'armature commute, et il en résulte l'ouverture des contacts de puissance. La valeur de la capacité C1 est telle qu'elle se décharge plus rapidement que C2 afin que le circuit de commande reste opérationnel jusqu'à l'ouverture des contacts. Quand la tension repasse au-dessous d'un seuil minimal V4, le circuit 12 bloque à l'instant t4 les interrupteurs T2 et T3.To voluntarily open the power contacts, the on-off switch I 0 is opened at time t 3 ; the control circuit 12 detects on its connection 12a the drop in the supply voltage below a threshold V3, while continuing to be supplied by the capacitor C2. Circuit 12 opens switches T1 and T4 and closes switches T2 and T3 continuously or modulated. The current from the capacitor Ci thus flows in the opposite direction in the coil L1, the armature of which switches, and this results in the opening of the power contacts. The value of the capacitor C1 is such that it discharges faster than C2 so that the control circuit remains operational until the contacts open. When the voltage falls below a minimum threshold V4, circuit 12 blocks switches T2 and T3 at time t 4 .

Lorsqu'un défaut électrique tel qu'une surintensité est constaté par un capteur de courant associé au circuit de puissance, le circuit de commande 12 reçoit sur son entrée 12c un signal correspondant ; en conséquence, il laisse au repos les interrupteurs T1-T4 et rend passant le transistor T5 de sorte que le courant de la capacité Ci traverse la bobine L2 qui actionne le mécanisme déclencheur. Puis le circuit 20 rend passant les transistors T2,T3 pour faire circuler dans la bobine L1 un courant apte à mettre l'électroaimant de commande dans un état confirmant l'ouverture des contacts : dans cette phase, le transistor T5 peut être bloqué pour contrôler le niveau de décharge de la capacité C1. La même séquence de déclenchement peut être initiée en réponse à une absence de courant dans la bobine L1 suite à une fermeture de l'interrupteur I0.When an electrical fault such as an overcurrent is noted by a current sensor associated with the power circuit, the control circuit 12 receives on its input 12c a corresponding signal; consequently, it leaves the switches T1-T4 at rest and turns on the transistor T5 so that the current of the capacitor Ci crosses the coil L2 which actuates the triggering mechanism. Then the circuit 20 turns on the transistors T2, T3 to circulate in the coil L1 a current capable of putting the control electromagnet in a state confirming the opening of the contacts: in this phase, the transistor T5 can be blocked to control the discharge level of capacity C1. The same tripping sequence can be initiated in response to an absence of current in the coil L1 following a closing of the switch I 0 .

Dans le mode de réalisation de la figure 2, la tension V est appliquée d'une part au pont en H 10 et à la capacité C1 via la diode D6 et d'autre part à une capacité additionnelle C'1 via une diode D'6. La charge des capacités C1 et C'1 s'effectue donc à travers la résistance de l'organe 3 et respectivement la diode D6 et la diode D'6. Les bornes positives des capacités C1,C'1 sont reliées à la borne haute de la bobine de déclenchement L2 via deux diodes en opposition D8,D9 dont le point commun des cathodes est désigné par B1. Le point de potentiel bas de la branche de déclenchement L2,T5,R2 est désigné par B2. Le circuit de commande 12 est disposé entre B1 et B2. Ce dispositif a pour avantage de permettre de remédier aux risques de dysfonctionnement en cas de défaillance de l'une ou l'autre capacité.In the embodiment of FIG. 2, the voltage V is applied in a part at the bridge in H 10 and at the capacity C1 via the diode D6 and on the other hand at a additional capacity C'1 via a diode D'6. The charge of capacities C1 and C'1 is therefore carried out through the resistance of the member 3 and respectively the diode D6 and diode D'6. The positive terminals of capacitors C1, C'1 are connected to the upper terminal of the L2 trip coil via two diodes in opposition D8, D9 whose common point of the cathodes is designated by B1. The low potential point of the trigger branch L2, T5, R2 is designated by B2. The control circuit 12 is arranged between B1 and B2. This device has the advantage of making it possible to remedy the risks of malfunction in the event of failure of one or the other capacity.

Ainsi, lorsqu'on veut commuter le dispositif pour ouvrir les contacts, si la capacité C1 est ouverte, le circuit de commande 12 détecte l'absence de courant dans la bobine L1 et la résistance R1, et en conséquence rend T5 passant ; la capacité C'1 se décharge via la diode D9 dans la bobine de déclenchement L2 pour ouvrir les contacts. Si la capacité C'1 est ouverte et que survient dans le circuit de puissance un défaut, par exemple un court-circuit, la capacité C1 se substitue à C'1 via la diode D8 pour alimenter la bobine L2 et ouvrir les contacts. Si la capacité C'1 se met en court-circuit lors du fonctionnement du dispositif, les diodes D8,D9 montées en opposition isolent la capacité en court-circuit de la capacité Ci qui peut dès lors alimenter la bobine L2 avec l'énergie nécessaire dès la fermeture de T5. Il convient de noter que le circuit de commande 12 connecté au point B1 voit la plus grande des tensions disponible aux bornes de C1 et C'1.So when you want to switch the device to open the contacts, if the capacity C1 is open, the control circuit 12 detects the absence of current in the coil L1 and the resistor R1, and consequently makes T5 passing ; the capacitor C'1 is discharged via the diode D9 in the tripping coil L2 to open the contacts. If the C'1 capacity is open and a fault occurs in the power circuit, for example a short circuit, the capacitor C1 replaces C'1 via the diode D8 to supply the coil L2 and open the contacts. If the capacitor C'1 short-circuits during operation of the device, the diodes D8, D9 mounted in opposition isolate the short-circuited capacity of the capacity Ci which can therefore supply the coil L2 with the necessary energy as soon as T5 is closed. It should be noted that the control circuit 12 connected to point B1 sees the largest voltages available across C1 and C'1.

Claims (6)

Dispositif de commande d'un appareil contacteur-disjoncteur électromécanique à contacts de puissance séparables comprenant d'une part un électroaimant muni d'une bobine de commande pour la fermeture et l'ouverture volontaires des contacts et d'autre part un électroaimant à bobine de déclenchement pour l'ouverture des contacts en cas de défaut, ainsi qu'une source d'énergie pour les bobines,
caractérisé par le fait que : l'électroaimant (E1) de commande volontaire est du type bistable et l'électroaimant (E2) de déclenchement est du type monostable. un pont (11) d'interrupteurs commutateurs est associé à la bobine de commande (L1) et un interrupteur de déclenchement (T5) est disposé en série avec la bobine de déclenchement (L2), la source d'énergie de la bobine de commande (L1) à la fermeture est une source de tension externe (V), tandis que la source d'énergie de la bobine de commande (L1) et de la bobine de déclenchement (L2) à l'ouverture est constituée par une capacité (C1; C1,C'1) montée en parallèle aux bobines (L1,L2). Control device for an electromechanical contactor-circuit breaker device with separable power contacts comprising on the one hand an electromagnet provided with a control coil for the voluntary closing and opening of the contacts and on the other hand an electromagnet with coil of release for opening the contacts in the event of a fault, as well as an energy source for the coils,
characterized by the fact that: the electromagnet (E1) of voluntary control is of the bistable type and the electromagnet (E2) of release is of the monostable type. a bridge (11) of switch switches is associated with the control coil (L1) and a trip switch (T5) is arranged in series with the trip coil (L2), the power source of the control coil (L1) at closing is an external voltage source (V), while the power source of the control coil (L1) and the release coil (L2) at the opening is constituted by a capacity (C1; C1, C'1) mounted in parallel with the coils (L1, L2). Dispositif selon la revendication 1, caractérisé par le fait que : un circuit de commande (12) sollicite d'une part les interrupteurs commutateurs (T1-T4) du pont pour faire circuler un courant de commutation dans la bobine de commande (L1), dans l'un ou l'autre sens, et d'autre part l'interrupteur de déclenchement (T5), en fonction du courant mesuré par des capteurs (13,14) respectivement associés à la bobine de commande (L1) et à la bobine de déclenchement (L2), le circuit de commande (12) pilote séquentiellement les interrupteurs commutateurs (T1-T4) et l'interrupteur de déclenchement (T5), de manière à assurer en cas de défaut une décharge prioritaire de la capacité (C1) dans la bobine de déclenchement (L2). Device according to claim 1, characterized in that: a control circuit (12) actuates on the one hand the switch switches (T1-T4) of the bridge to circulate a switching current in the control coil (L1), in one or the other direction, and d on the other hand the tripping switch (T5), as a function of the current measured by sensors (13,14) respectively associated with the control coil (L1) and with the tripping coil (L2), the control circuit (12) sequentially controls the switch switches (T1-T4) and the trip switch (T5), so as to ensure in the event of a fault a priority discharge of the capacity (C1) in the trip coil ( L2). Dispositif selon la revendication 1, caractérisé par le fait qu'une capacité d'ouverture normale (C1) est montée en parallèle à la bobine de commande (L1) et à son pont (11) d'interrupteurs, une capacité d'ouverture sur défaut (C'1) est montée en parallèle à la bobine de déclenchement (L2), cette dernière étant reliée d'une part au pôle positif du pont et de la capacité d'ouverture normale via une première diode (D8) et d'autre part au pôle positif de la capacité d'ouverture sur défaut via une seconde diode (D9), les diodes étant montées en opposition avec le point commun (B1) de leurs cathodes relié à la bobine de déclenchement (L2).Device according to claim 1, characterized in that a capacity opening (C1) is mounted in parallel to the control coil (L1) and at its bridge (11) of switches, an opening capacity on fault (C'1) is mounted in parallel with the trip coil (L2), the latter being connected on the one hand to the positive pole of the bridge and the opening capacity normal via a first diode (D8) and on the other hand to the positive pole of the fault opening capacity via a second diode (D9), the diodes being mounted in opposition with the common point (B1) of their cathodes connected to the release coil (L2). Dispositif selon la revendication 1, caractérisé par le fait les capteurs de courant (13,14) sont agencés en pont résistif (R1,R2) connecté d'une part au pont (11) d'interrupteurs commutateurs et à l'interrupteur de déclenchement (T5), d'autre part à une seule entrée (12c) du circuit de commande (12).Device according to claim 1, characterized by the fact that the sensors current (13,14) are arranged in resistive bridge (R1, R2) connected on the one hand to bridge (11) of switch switches and the trip switch (T5), on the other hand to a single input (12c) of the control circuit (12). Dispositif selon la revendication 1, caractérisé par le fait que le circuit de commande (12) est apte à piloter les interrupteurs commutateurs (T1-T4) par des impulsions modulées.Device according to claim 1, characterized in that the circuit for control (12) is able to control the switch switches (T1-T4) by modulated pulses. Dispositif selon la revendication 1, caractérisé par le fait que le circuit de commande (12) comprend un organe réducteur de consommation (3).Device according to claim 1, characterized in that the circuit for control (12) comprises a consumption reducing member (3).
EP98402622A 1997-10-24 1998-10-21 Control device for an electromechanical contactor-circuit breaker type device with separable power contacts Expired - Lifetime EP0911851B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9713478 1997-10-24
FR9713478A FR2770336B1 (en) 1997-10-24 1997-10-24 CONTROL DEVICE FOR CONTACTOR-CIRCUIT-BREAKER APPARATUS

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EP0911851A1 true EP0911851A1 (en) 1999-04-28
EP0911851B1 EP0911851B1 (en) 2004-03-17

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EP (1) EP0911851B1 (en)
JP (1) JPH11234893A (en)
CA (1) CA2250348A1 (en)
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ES (1) ES2215283T3 (en)
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CA2250348A1 (en) 1999-04-24
DE69822397D1 (en) 2004-04-22
TW417128B (en) 2001-01-01
FR2770336A1 (en) 1999-04-30
JPH11234893A (en) 1999-08-27
ES2215283T3 (en) 2004-10-01
FR2770336B1 (en) 1999-12-03
US5959826A (en) 1999-09-28
EP0911851B1 (en) 2004-03-17
DE69822397T2 (en) 2004-08-19

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