EP0331586B1 - Actuating mechanism of an auxiliary tripping block for a modular circuit breaker - Google Patents

Actuating mechanism of an auxiliary tripping block for a modular circuit breaker Download PDF

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Publication number
EP0331586B1
EP0331586B1 EP89420031A EP89420031A EP0331586B1 EP 0331586 B1 EP0331586 B1 EP 0331586B1 EP 89420031 A EP89420031 A EP 89420031A EP 89420031 A EP89420031 A EP 89420031A EP 0331586 B1 EP0331586 B1 EP 0331586B1
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EP
European Patent Office
Prior art keywords
lever
trip
relay
plate
auxiliary
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Expired - Lifetime
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EP89420031A
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German (de)
French (fr)
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EP0331586A1 (en
Inventor
Patrick De Robertis
Patrick Guillon
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Merlin Gerin SA
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Merlin Gerin SA
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1072—Release mechanisms which are reset by opening movement of contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • 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
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • 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
    • H01H83/22—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 the other condition being unbalance of two or more currents or voltages

Definitions

  • German patent 3114717 which is applied to an undervoltage release for a modular circuit breaker.
  • the relay is reset by the plate acting on the pivoting reset lever on the same axis as the release lever.
  • the mechanical tripping link is coupled to the circuit breaker block by means of a bearing fixed on the lower arm of the tripping lever.
  • the circuit board of the auxiliary block also triggers the switching mechanism of the circuit breaker block, but this tripping is effected with a certain delay after unlocking the latching.
  • the object of the invention is to reduce the tripping time of the mechanism of a circuit breaker block associated with a relay of an auxiliary block.
  • the auxiliary trigger block is characterized in that the plate carries a lug of the mechanical trigger link, and a third articulation axis of the trigger lever, which comprises a first arm cooperating with the latching, and a second separate arm of the relay trigger pin by the reset lever mounted on the second axis to rotate freely.
  • the relay's function consists exclusively in unlocking the latch, which then releases the plate.
  • the mechanical energy available following the expansion of the accumulator spring serves simultaneously to transmit the tripping force of the circuit breaker block, and to reset the relay.
  • the reset lever is equipped with a damping spring on which a protrusion of the plate first acts when it moves towards the disarmed position, the spring being arranged to modulate the reset force exerted on the pin of the relay.
  • the damping spring is advantageously shaped as a pin pre-assembled on the rearming lever before setting place of the latter in the second axis of the housing.
  • a biasing spring is associated with the reset lever to urge it to bear against the trigger lever when the plate is in the armed position. A predetermined distance then separates the trigger pin from the reset lever when the relay is armed.
  • an auxiliary tripping unit 10 with molded insulating housing 12 can be attached and coupled laterally to a multipole circuit breaker unit (not shown) of conjugate shape.
  • Each pole of the circuit breaker block is equipped with a switching mechanism, for example of the type described in French patent application No. 8708037 filed by the applicant on 9/06/1987.
  • the switching mechanism is associated with a pivoting manual control lever, and with a magnetothermic main trip unit intended to monitor the intensity of the current passing through the pole.
  • a pair of separable contacts cooperates with the switching mechanism to interrupt or close the electrical circuit formed between two pole connection terminals.
  • the auxiliary trigger block 10 contains a control mechanism 14 controlled by a reset lever 16, and a relay 18 with trigger coil.
  • the mechanism 14 transmits the trip order from the relay 18 to the circuit breaker block, via a mechanical trip link 19.
  • This connection is formed by a lug 20 passing through an opening 22 of the housing 12 to cooperate with the trip bar (not shown) of the switching mechanism of the circuit breaker block.
  • the auxiliary unit 10 can be arranged either as a differential trigger, or as an undervoltage trigger MN, or as an emission trigger MX.
  • the control mechanism 14 is standard, while the relay 18 is adapted to each type of trip device.
  • the relay 18 is electrically connected to a differential detector with zero sequence transformer for summing the currents flowing through the active input conductors of the circuit breaker block.
  • the differential detector causes the coil of relay 18 to energize, which triggers triggering of the control mechanism 14, and the cascade tripping of the circuit breaker block via the mechanical connection 19.
  • the relay 18 acts when the voltage of the network to be monitored disappears or reaches a value below a predetermined threshold. This results in automatic tripping of the circuit breaker block on lack of voltage.
  • relay 18 In the case of an MX release trip device, the excitation of relay 18 occurs from the outside via a remote control circuit controlled by a push button or a PLC. This results in forced remote triggering of the circuit breaker block.
  • the control mechanism 14 of the auxiliary triggering unit 10 comprises a plate 24 pivotally mounted on a first axis 26 fixed between an armed position ( Figure 1) and a disarmed position ( Figure 3).
  • the plate 24 carries the lug 20 of the mechanical connection 19 for triggering, and a third axis 28 on which is threaded a trigger lever 30 whose first upper arm cooperates in the locked position with a latching lever 31 to form a latching 32.
  • the latching lever 31 is mounted with limited pivoting on an axis 34 of the plate 24, and is coupled to the lever 16 by a transmission link 36.
  • the reset lever 16 is pivotally mounted on a fixed axis 38 , parallel to the axis 26 of the plate 24, and forms with the link 36, a toggle whose articulation point 40 is eccentric relative to the axis 38 of the lever 16.
  • the trigger lever 30 is biased towards the locked position by an elastic tongue 42 acting as a return spring.
  • an intermediate reset lever 44 of the relay 18 Between the relay 18 and the plate 24 is arranged an intermediate reset lever 44 of the relay 18, one of the ends of the lever 44 being mounted for free rotation on a second axis 46.
  • the opposite end 48 cooperates to the left with the stud 50 for actuating the relay 18, and to the right with the second lower arm of the trigger lever 30.
  • a boss 52 On which is a pin-shaped spring 54. L one of the strands 53 of the pin 54 is moved by a projection 56 of the plate 24 when the mechanism 14 is triggered, while the other strand 58 remains permanently in abutment against a projection of the end 48.
  • the accumulator spring 60 of the control mechanism 14 is formed by a torsion spring mounted coaxially on the axis 26 of the plate 24.
  • the spring 60 is supported on a protuberance 62 of the insulating housing 12, and biases the plate 24 in the direction reverse clockwise to the disarmed position ( Figure 3), after the snap 32 commanded by the pin 50 of the trigger relay 18.
  • a stop 64 stops the movement of the plate 24 when the lever 16 arrives in the open position of the circuit breaker (see FIG. 3).
  • the upper edge of the plate 24 is provided with a signaling light 66 capable of being positioned opposite a display orifice 68 formed in the front face of the housing 12 to signal the tripping of the circuit breaker by the action of the mechanism 14 of the auxiliary unit 10.
  • the indicator 66 advantageously includes a colored zone clearly visible through the orifice 68.
  • the lever 16 In the armed position of the auxiliary unit 10, shown in FIG. 1, the lever 16 is in the stable position on the right, and a slight clearance separates the stud 50 from the end 48 of the reset lever 44.
  • the accumulator spring 60 is bandaged, and the locking of the coupling 32 by the trigger lever 30 maintains the kinematic connection between the plate 24 and the lever 16.
  • the trigger pin 50 is propelled in the direction of the arrow F (see FIG. 2), and strikes the reset lever 44 which pivots around the axis 46 in the opposite direction of the Clockwise.
  • the displacement of the reset lever 44 causes the trigger lever 30 from the locked position to the unlocked position so as to break the coupling 32, and to break the kinematic link between the lever 16 and the plate 24.
  • the plate 24 pivots about its axis 26 in the opposite direction of clockwise to the position shown in FIG. 3, by fulfilling two distinct functions, namely a first tripping function of the juxtaposed circuit breaker block, and a second resetting function of relay 18.
  • the first triggering function is provided by the lug 20 of the plate 24 passing the mechanical link 19 from the lowered position (FIG. 2) to the raised position (FIG. 3) along the curvilinear opening 22 of the housing 12. This results in tripping of the circuit breaker block switching mechanism, and the automatic opening of the contacts of the different poles.
  • the second reset function of the relay 18 is operated by the engagement engagement of the projection 56 with the strand 53 of the spring 54 driving the intermediate reset lever 44 clockwise so as to push back the stud 50 from inward release (see Figure 3).
  • the relay 18 is reset when the plate 24 comes into contact with the stop 64, and the lever 16 is in the stable position on the left corresponding to the open position of the circuit breaker block. In this position of FIG. 3, the latching 32 is automatically relocked to re-establish the kinematic connection between the lever 16 and the plate 24.
  • the shock-absorbing spring 54 makes it possible to elastically collect the overshoots of the control mechanism 14, and to limit the reset effort on the pin 50 of the relay 18.
  • the accumulator spring 60 remains disarmed as long as the plate 24 is in abutment against the stop 64.
  • the final reset of the auxiliary unit 10 is effected by a rotation of the lever 16 in a clockwise direction from the left position (Figure 3), to the right position ( Figure 1).
  • This movement of the lever 16 returns the plate 24 from the disarmed position to the armed position, movement during which the accumulator spring 60 is automatically bandaged, and the lug 20 of the trip link-19 is biased towards the lowered inactive position authorizing the closing of the circuit breaker.
  • the rotation of the lever 16 for the final reset of the auxiliary unit 10 can intervene manually or automatically.
  • the lever 16 is independent of the switching mechanism of the adjacent circuit breaker block.
  • the lever 16 is connected to the switching mechanism by a mechanical reset link.
  • the reset lever 44 is provided with a biasing spring 70 which biases said lever 44 in abutment against the second lower arm of the trigger lever 30 when the plate 24 is in the armed position.
  • a constant minimum distance separates the stud 50 from the end 48 of the reset lever 44 (see FIG. 1).
  • This arrangement makes it possible to reduce the response time of the circuit breaker when the tripping order is sent to the switching mechanism.

Description

L'invention est relative à un bloc auxiliaire de déclenchement à boîtier isolant moulé susceptible d'être accolé et accouplé latéralement à un bloc disjoncteur multipolaire comprenant au moins une paire de contacts séparables, et un mécanisme de commutation associé à un déclencheur principal magnétothermique, le boîtier du bloc auxiliaire renfermant un mécanisme de commande, lequel comporte :

  • un levier de déclenchement piloté par un relais de déclenchement ayant une bobine de commande et un téton de déclenchement,
  • une liaison mécanique de transmission de l'ordre de déclenchement émis par le téton du relais vers le mécanisme de commutation du bloc disjoncteur, de manière à déclencher ce dernier par coopération de la bobine dudit relais,
  • un accrochage agencé entre une manette et une platine, laquelle est montée à pivotement sur un premier axe fixe entre une position armée et une position désarmée,
  • un ressort accumulateur d'énergie sollicitant la platine vers la position désarmée lors de la rupture de l'accrochage provoquée par le levier de déclenchement,
  • et un levier intermédiaire de réarmement automatique du relais sous l'action du déplacement de la platine vers la position désarmée, ledit levier étant articulé sur un deuxième axe fixe du boîtier.
The invention relates to an auxiliary trigger block with molded insulating casing capable of being attached and coupled laterally to a multipole circuit breaker block comprising at least one pair of separable contacts, and a switching mechanism associated with a main magnetothermal trigger, the housing of the auxiliary block containing a control mechanism, which comprises:
  • a trigger lever controlled by a trigger relay having a control coil and a trigger pin,
  • a mechanical link for transmitting the tripping order sent by the pin of the relay to the switching mechanism of the circuit breaker block, so as to trip the latter by cooperation of the coil of said relay,
  • a coupling arranged between a lever and a plate, which is pivotally mounted on a first fixed axis between an armed position and a disarmed position,
  • an energy accumulator spring urging the plate towards the disarmed position during the breaking of the coupling caused by the trigger lever,
  • and an intermediate lever for automatic resetting of the relay under the action of displacement of the plate towards the disarmed position, said lever being articulated on a second fixed axis of the housing.

Un tel dispositif est connu du brevet allemand 3114717, lequel est appliqué à un déclencheur à minimum de tension pour un disjoncteur modulaire. Le réarmement du relais s'effectue par la platine agissant sur le levier de réarmement monté à pivotement sur le même axe que le levier de déclenchement. L'accouplement de la liaison mécanique de déclenchement avec le bloc disjoncteur s'effectue au moyen d'une portée fixée sur le bras inférieur du levier de déclenchement. La platine du bloc auxiliaire provoque également le déclenchement du mécanisme de commutation du bloc disjoncteur, mais ce déclenchement est opéré avec un certain retard après le déverrouillage de l'accrochage.Such a device is known from German patent 3114717, which is applied to an undervoltage release for a modular circuit breaker. The relay is reset by the plate acting on the pivoting reset lever on the same axis as the release lever. The mechanical tripping link is coupled to the circuit breaker block by means of a bearing fixed on the lower arm of the tripping lever. The circuit board of the auxiliary block also triggers the switching mechanism of the circuit breaker block, but this tripping is effected with a certain delay after unlocking the latching.

L'objet de l'invention consiste à réduire le temps de déclenchement du mécanisme d'un bloc disjoncteur associé à un relais d'un bloc auxiliaire.The object of the invention is to reduce the tripping time of the mechanism of a circuit breaker block associated with a relay of an auxiliary block.

Le bloc auxiliaire de déclenchement est caractérisé en ce que la platine porte un ergot de la liaison mécanique de déclenchement, et un troisième axe d'articulation du levier de déclenchement, lequel comporte un premier bras coopérant avec l'accrochage, et un deuxième bras séparé du téton de déclenchement du relais par le levier de réarmement monté à rotation libre sur le deuxième axe.The auxiliary trigger block is characterized in that the plate carries a lug of the mechanical trigger link, and a third articulation axis of the trigger lever, which comprises a first arm cooperating with the latching, and a second separate arm of the relay trigger pin by the reset lever mounted on the second axis to rotate freely.

La fonction du relais consiste exclusivement à déverrouiller l'accrochage, lequel libère ensuite la platine. L'énergie mécanique disponible suite à la détente du ressort accumulateur sert simultanément à transmettre la force de déclenchement du bloc disjoncteur, et à réarmer le relais.The relay's function consists exclusively in unlocking the latch, which then releases the plate. The mechanical energy available following the expansion of the accumulator spring serves simultaneously to transmit the tripping force of the circuit breaker block, and to reset the relay.

Après réarmement du relais, l'énergie mécanique est à nouveau emmagasinée dans le ressort accumulateur de la platine lors de l'actionnement de la manette vers la position d'enclenchement, et l'accrochage maintient le ressort en position armée.After resetting the relay, the mechanical energy is again stored in the platen accumulator spring when the lever is actuated towards the latching position, and the latching keeps the spring in the armed position.

Le levier de réarmement est équipé d'un ressort amortisseur sur lequel agit en premier une saillie de la platine lors de son déplacement vers la position désarmée, le ressort étant agencé pour moduler l'effort de réarmement exercé sur le téton du relais. Le ressort amortisseur est avantageusement conformé en épingle prémontée sur le levier de réarmement avant la mise en place de ce dernier dans le deuxième axe du boîtier.The reset lever is equipped with a damping spring on which a protrusion of the plate first acts when it moves towards the disarmed position, the spring being arranged to modulate the reset force exerted on the pin of the relay. The damping spring is advantageously shaped as a pin pre-assembled on the rearming lever before setting place of the latter in the second axis of the housing.

Un ressort de polarisation est associé au levier de réarmement pour le solliciter en appui contre le levier de déclenchement lorsque la platine se trouve dans la position armée. Une distance prédéterminée sépare alors le téton de déclenchement du levier de réarmement lorsque le relais est armé.A biasing spring is associated with the reset lever to urge it to bear against the trigger lever when the plate is in the armed position. A predetermined distance then separates the trigger pin from the reset lever when the relay is armed.

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

  • la figure 1 est une vue schématique en élévation du mécanisme de commande d'un bloc auxiliaire de déclenchement, représenté en position enclenchée du disjoncteur;
  • les figures 2 et 3 sont des vues identiques à la figure 1, respectivement en cours de déclenchement, et en position déclenchée du disjoncteur.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example and represented in the appended drawings in which:
  • Figure 1 is a schematic elevational view of the control mechanism of an auxiliary trip unit, shown in the engaged position of the circuit breaker;
  • Figures 2 and 3 are views identical to Figure 1, respectively during tripping, and in the tripped position of the circuit breaker.

En référence aux figures 1 à 3, un bloc auxiliaire 10 de déclenchement à boîtier 12 isolant moulé, peut être accolé et accouplé latéralement à un bloc disjoncteur (non représenté) multipolaire de forme conjuguée.With reference to FIGS. 1 to 3, an auxiliary tripping unit 10 with molded insulating housing 12 can be attached and coupled laterally to a multipole circuit breaker unit (not shown) of conjugate shape.

Chaque pôle du bloc disjoncteur est équipé d'un mécanisme de commutation, par exemple du type décrit dans la demande de brevet fran ais n° 8708037 déposée par la demanderesse le 9/06/1987. Le mécanisme de commutation est associé à une manette pivotante de commande manuelle, et à un déclencheur principal magnétothermique destiné à surveiller l'intensité du courant traversant le pôle. Une paire de contacts séparables coopère avec le mécanisme de commutation pour assurer l'interruption ou la fermeture du circuit électrique ménagé entre deux bornes de connexion du pôle.Each pole of the circuit breaker block is equipped with a switching mechanism, for example of the type described in French patent application No. 8708037 filed by the applicant on 9/06/1987. The switching mechanism is associated with a pivoting manual control lever, and with a magnetothermic main trip unit intended to monitor the intensity of the current passing through the pole. A pair of separable contacts cooperates with the switching mechanism to interrupt or close the electrical circuit formed between two pole connection terminals.

Le bloc auxiliaire 10 de déclenchement renferme un mécanisme de commande 14 piloté par une manette 16 de réarmement, et un relais 18 à bobine de déclenchement. Le mécanisme 14 transmet l'ordre de déclenchement issu du relais 18 vers le bloc disjoncteur, par l'intermédiaire d'une liaison mécanique 19 de déclenchement. Cette liaison est formée par un ergot 20 traversant une ouverture 22 du boîtier 12 pour coopérer avec la barre de déclenchement (non représentée) du mécanisme de commutation du bloc disjoncteur.The auxiliary trigger block 10 contains a control mechanism 14 controlled by a reset lever 16, and a relay 18 with trigger coil. The mechanism 14 transmits the trip order from the relay 18 to the circuit breaker block, via a mechanical trip link 19. This connection is formed by a lug 20 passing through an opening 22 of the housing 12 to cooperate with the trip bar (not shown) of the switching mechanism of the circuit breaker block.

Le bloc auxiliaire 10 peut être agencé, soit en déclencheur différentiel, soit en déclencheur à minimum de tension MN, soit en déclencheur à émission MX. Le mécanisme de commande 14 est standard, tandis que le relais 18 est adapté à chaque type de déclencheur.The auxiliary unit 10 can be arranged either as a differential trigger, or as an undervoltage trigger MN, or as an emission trigger MX. The control mechanism 14 is standard, while the relay 18 is adapted to each type of trip device.

Dans le cas d'un déclencheur différentiel, le relais 18 est branché électriquement à un détecteur différentiel à transformateur homopolaire de sommation des courants parcourant les conducteurs actifs d'entrée du bloc disjoncteur. Lors de l'apparition d'un défaut d'isolement, le détecteur différentiel provoque l'excitation de la bobine du relais 18 qui engendre le déclenchement du mécanisme de commande 14, et le déclenchement en cascade du bloc disjoncteur par l'intermédiaire de la liaison mécanique 19.In the case of a differential trip device, the relay 18 is electrically connected to a differential detector with zero sequence transformer for summing the currents flowing through the active input conductors of the circuit breaker block. When an insulation fault occurs, the differential detector causes the coil of relay 18 to energize, which triggers triggering of the control mechanism 14, and the cascade tripping of the circuit breaker block via the mechanical connection 19.

Dans le cas d'un déclencheur à minimum de tension MN, le relais 18 agit lorsque la tension du réseau à surveiller vient à disparaître ou atteint une valeur inférieure à un seuil prédéterminé. Il en résulte un déclenchement automatique du bloc disjoncteur sur manque de tension.In the case of an undervoltage release MN, the relay 18 acts when the voltage of the network to be monitored disappears or reaches a value below a predetermined threshold. This results in automatic tripping of the circuit breaker block on lack of voltage.

Dans le cas d'un déclencheur à émission MX, l'excitation du relais 18 intervient depuis l'extérieur par un circuit de télécommande piloté par un bouton poussoir ou un automate. Il en résulte un déclenchement forcé à distance du bloc disjoncteur.In the case of an MX release trip device, the excitation of relay 18 occurs from the outside via a remote control circuit controlled by a push button or a PLC. This results in forced remote triggering of the circuit breaker block.

Le mécanisme de commande 14 du bloc auxiliaire 10 de déclenchement comporte une platine 24 montée à pivotement sur un premier axe 26 fixe entre une position armée (figure 1) et une position désarmée (figure 3). La platine 24 porte l'ergot 20 de la liaison mécanique 19 de déclenchement, et un troisième axe 28 sur lequel est enfilé un levier de déclenchement 30 dont le premier bras supérieur coopère en position verrouillée avec un levier d'encliquetage 31 pour former un accrochage 32. Le levier d'encliquetage 31 est monté à pivotement limité sur un axe 34 de la platine 24, et est accouplé à la manette 16 par une biellette de transmission 36. La manette 16 de réarmement est montée à basculement sur un axe 38 fixe, parallèle à l'axe 26 de la platine 24, et forme avec la biellette 36, une genouillère dont le point d'articulation 40 est excentré par rapport à l'axe 38 de la manette 16.The control mechanism 14 of the auxiliary triggering unit 10 comprises a plate 24 pivotally mounted on a first axis 26 fixed between an armed position (Figure 1) and a disarmed position (Figure 3). The plate 24 carries the lug 20 of the mechanical connection 19 for triggering, and a third axis 28 on which is threaded a trigger lever 30 whose first upper arm cooperates in the locked position with a latching lever 31 to form a latching 32. The latching lever 31 is mounted with limited pivoting on an axis 34 of the plate 24, and is coupled to the lever 16 by a transmission link 36. The reset lever 16 is pivotally mounted on a fixed axis 38 , parallel to the axis 26 of the plate 24, and forms with the link 36, a toggle whose articulation point 40 is eccentric relative to the axis 38 of the lever 16.

Le levier de déclenchement 30 est sollicité vers la position verrouillée par une languette 42 élastique agissant en ressort de rappel. Entre le relais 18 et la platine 24 est agencé un levier intermédiaire de réarmement 44 du relais 18, l'une des extrémités du levier 44 étant montée à rotation libre sur un deuxième axe 46. L'extrémité 48 opposée coopère à gauche avec le téton 50 d'actionnement du relais 18, et à droite avec le deuxième bras inférieur du levier de déclenchement 30. Entre les deux extrémités du levier de réarmement 44 se trouve un bossage 52 sur lequel est prémonté un ressort en forme d'épingle 54. L'un des brins 53 de l'épingle 54 est déplacé par une saillie 56 de la platine 24 lors du déclenchement du mécanisme 14, tandis que l'autre brin 58 reste en permanence en appui contre une saillie de l'extrémité 48.The trigger lever 30 is biased towards the locked position by an elastic tongue 42 acting as a return spring. Between the relay 18 and the plate 24 is arranged an intermediate reset lever 44 of the relay 18, one of the ends of the lever 44 being mounted for free rotation on a second axis 46. The opposite end 48 cooperates to the left with the stud 50 for actuating the relay 18, and to the right with the second lower arm of the trigger lever 30. Between the two ends of the reset lever 44 is a boss 52 on which is a pin-shaped spring 54. L one of the strands 53 of the pin 54 is moved by a projection 56 of the plate 24 when the mechanism 14 is triggered, while the other strand 58 remains permanently in abutment against a projection of the end 48.

Le ressort accumulateur 60 du mécanisme de commande 14 est formé par un ressort de torsion monté coaxialement sur l'axe 26 de la platine 24. Le ressort 60 prend appui sur une protubérance 62 du boîtier 12 isolant, et sollicite la platine 24 dans le sens inverse des aiguilles d'une montre vers la position désarmée (figure 3), après la rupture de l'accrochage 32 commandée par le téton 50 du relais 18 de déclenchement. Une butée 64 stoppe le mouvement de la platine 24 lorsque la manette 16 arrive dans la position d'ouverture du disjoncteur (voir figure 3).The accumulator spring 60 of the control mechanism 14 is formed by a torsion spring mounted coaxially on the axis 26 of the plate 24. The spring 60 is supported on a protuberance 62 of the insulating housing 12, and biases the plate 24 in the direction reverse clockwise to the disarmed position (Figure 3), after the snap 32 commanded by the pin 50 of the trigger relay 18. A stop 64 stops the movement of the plate 24 when the lever 16 arrives in the open position of the circuit breaker (see FIG. 3).

Le chant supérieur de la platine 24 est doté d'un voyant de signalisation 66 susceptible d'être positionné en regard d'un orifice 68 de visualisation ménagé dans la face antérieure du boîtier 12 pour signaler le déclenchement du disjoncteur par l'action du mécanisme 14 du bloc auxiliaire 10. Le voyant 66 comprend avantageusement une zone colorée bien visible à travers l'orifice 68.The upper edge of the plate 24 is provided with a signaling light 66 capable of being positioned opposite a display orifice 68 formed in the front face of the housing 12 to signal the tripping of the circuit breaker by the action of the mechanism 14 of the auxiliary unit 10. The indicator 66 advantageously includes a colored zone clearly visible through the orifice 68.

Le fonctionnement du mécanisme 14 de commande du bloc auxiliaire 10 de déclenchement est le suivant:The operation of the mechanism 14 for controlling the auxiliary trigger block 10 is as follows:

DISJONCTEUR ENCLENCHECIRCUIT BREAKER

En position armée du bloc auxiliaire 10, représentée sur la figure 1, la manette 16 se trouve dans la position stable de droite, et un léger jeu sépare le téton 50 de l'extrémité 48 du levier de réarmement 44. Le ressort accumulateur 60 est bandé, et le verrouillage de l'accrochage 32 par le levier de déclenchement 30 maintient la liaison cinématique entre la platine 24 et la manette 16.In the armed position of the auxiliary unit 10, shown in FIG. 1, the lever 16 is in the stable position on the right, and a slight clearance separates the stud 50 from the end 48 of the reset lever 44. The accumulator spring 60 is bandaged, and the locking of the coupling 32 by the trigger lever 30 maintains the kinematic connection between the plate 24 and the lever 16.

DISJONCTEUR EN COURS DE DECLENCHEMENTCIRCUIT BREAKER BEING TRIGGERED

En cas d'excitation du relais 18, le téton 50 de déclenchement est propulsé dans le sens de la flèche F (voir figure 2), et vient percuter le levier de réarmement 44 qui pivote autour de l'axe 46 dans le sens inverse des aiguilles d'une montre. Le déplacement du levier de réarmement 44 entraîne le levier de déclenchement 30 de la position verrouillée vers la position déverrouillée de manière à rompre l'accrochage 32, et à briser la liaison cinématique entre la manette 16 et la platine 24. Soumise à l'action de détente du ressort accumulateur 60, la platine 24 pivote alors autour de son axe 26 dans le sens inverse des aiguilles d'une montre vers la position représentée à la figure 3, en remplissant deux fonctions distinctes, à savoir une première fonction de déclenchement du bloc disjoncteur juxtaposé, et une deuxième fonction de réarmement du relais 18.If the relay 18 is energized, the trigger pin 50 is propelled in the direction of the arrow F (see FIG. 2), and strikes the reset lever 44 which pivots around the axis 46 in the opposite direction of the Clockwise. The displacement of the reset lever 44 causes the trigger lever 30 from the locked position to the unlocked position so as to break the coupling 32, and to break the kinematic link between the lever 16 and the plate 24. Subject to action trigger of the accumulator spring 60, the plate 24 then pivots about its axis 26 in the opposite direction of clockwise to the position shown in FIG. 3, by fulfilling two distinct functions, namely a first tripping function of the juxtaposed circuit breaker block, and a second resetting function of relay 18.

La première fonction de déclenchement est assurée par l'ergot 20 de la platine 24 faisant passer la liaison mécanique 19 de la position abaissée (figure 2) vers la position relevée (figure 3) le long de l'ouverture 22 curviligne du boîtier 12. Il en résulte un déclenchement du mécanisme de commutation du bloc disjoncteur, et l'ouverture automatique des contacts des différents pôles.The first triggering function is provided by the lug 20 of the plate 24 passing the mechanical link 19 from the lowered position (FIG. 2) to the raised position (FIG. 3) along the curvilinear opening 22 of the housing 12. This results in tripping of the circuit breaker block switching mechanism, and the automatic opening of the contacts of the different poles.

La deuxième fonction de réarmement du relais 18 est opérée par la venue en engagement de la saillie 56 avec le brin 53 du ressort 54 entraînant le levier intermédiaire de réarmement 44 dans le sens des aiguilles d'une montre de manière à repousser le téton 50 de déclenchement vers l'intérieur (voir figure 3). Le relais 18 est réarmé lorsque la platine 24 vient en contact avec la butée 64, et la manette 16 se trouve dans la position stable de gauche correspondant à la position d'ouverture du bloc disjoncteur. Dans cette position de la figure 3, l'accrochage 32 est reverrouillé automatiquement pour rétablir la liaison cinématique entre la manette 16 et la platine 24. Le ressort 54 amortisseur permet d'encaisser élastiquement les surcourses du mécanisme de commande 14, et de limiter l'effort de réarmement sur le téton 50 du relais 18. Le ressort accumulateur 60 reste désarmé aussi longtemps que la platine 24 se trouve en appui contre la butée 64.The second reset function of the relay 18 is operated by the engagement engagement of the projection 56 with the strand 53 of the spring 54 driving the intermediate reset lever 44 clockwise so as to push back the stud 50 from inward release (see Figure 3). The relay 18 is reset when the plate 24 comes into contact with the stop 64, and the lever 16 is in the stable position on the left corresponding to the open position of the circuit breaker block. In this position of FIG. 3, the latching 32 is automatically relocked to re-establish the kinematic connection between the lever 16 and the plate 24. The shock-absorbing spring 54 makes it possible to elastically collect the overshoots of the control mechanism 14, and to limit the reset effort on the pin 50 of the relay 18. The accumulator spring 60 remains disarmed as long as the plate 24 is in abutment against the stop 64.

REARMEMENT FINAL DU BLOC AUXILIAIRE.FINAL RESET OF THE AUXILIARY BLOCK.

Le réarmement final du bloc auxiliaire 10 s'opère par une rotation de la manette 16 dans le sens des aiguilles d'une montre à partir de la position de gauche (figure 3), vers la position de droite (figure 1). Ce déplacement de la manette 16 ramène la platine 24 de la position désarmée vers la position armée, mouvement au cours duquel le ressort accumulateur 60 est bandé automatiquement, et l'ergot 20 de la liaison de déclenchement-19 est sollicité vers la position inactive abaissée autorisant la fermeture du disjoncteur.The final reset of the auxiliary unit 10 is effected by a rotation of the lever 16 in a clockwise direction from the left position (Figure 3), to the right position (Figure 1). This movement of the lever 16 returns the plate 24 from the disarmed position to the armed position, movement during which the accumulator spring 60 is automatically bandaged, and the lug 20 of the trip link-19 is biased towards the lowered inactive position authorizing the closing of the circuit breaker.

La rotation de la manette 16 pour le réarmement final du bloc auxiliaire 10 peut intervenir manuellement ou automatiquement. Dans le premier cas, la manette 16 est indépendante du mécanisme de commutation du bloc disjoncteur accolé. Dans le deuxième cas, la manette 16 est reliée au mécanisme de commutation par une liaison mécanique de réarmement.The rotation of the lever 16 for the final reset of the auxiliary unit 10 can intervene manually or automatically. In the first case, the lever 16 is independent of the switching mechanism of the adjacent circuit breaker block. In the second case, the lever 16 is connected to the switching mechanism by a mechanical reset link.

On remarque que le levier de réarmement 44 est pourvu d'un ressort 70 de polarisation qui sollicite ledit levier 44 en appui contre le deuxième bras inférieur du levier de déclenchement 30 lorsque la platine 24 se trouve dans la position armée. Lorsque le relais 18 est armé, une distance minimale constante sépare le téton 50 de l'extrémité 48 du levier de réarmement 44 (voir figure 1).Note that the reset lever 44 is provided with a biasing spring 70 which biases said lever 44 in abutment against the second lower arm of the trigger lever 30 when the plate 24 is in the armed position. When the relay 18 is armed, a constant minimum distance separates the stud 50 from the end 48 of the reset lever 44 (see FIG. 1).

Cet agencement permet de réduire le temps de réponse du disjoncteur lors de l'émission de l'ordre de déclenchement vers le mécanisme de commutation.This arrangement makes it possible to reduce the response time of the circuit breaker when the tripping order is sent to the switching mechanism.

Claims (9)

  1. An auxiliary trip unit (10) with a moulded insulating case (12) capable of being adjoined and coupled laterally to a multipole circuit breaker unit comprising at least one pair of separable contacts, and a switching mechanism associated with a thermal and magnetic main trip device, the case (12) of the auxiliary unit (10) housing an operating mechanism (14), which comprises:
    - a trip lever (30) controlled by a trip relay (18) having an operating coil, and a tripping cap (50);
    - a mechanical link (19) for transmission of the tripping order sent by the cap (50) of the relay (18) to the switching mechanism of the circuit breaker unit so as to trip the latter by cooperation of the coil of said relay (18);
    - a latch (32) arranged between a handle (16) and a plate (24) which is pivotally mounted on a first fixed spindle (26) between a loaded position and an unloaded position;
    - an energy storage spring (60) urging the plate (24) to the unloaded position when breaking of the latch (32) occurs brought about by the trip lever (30);
    - and an intermediate lever (44) for automatic resetting of the relay (18) due to the action of the plate (24) moving to the unloaded position, said lever (44) being articulated on a second fixed spindle (46) of the case (12),
    characterized in that :
    the plate (24) bears a pin (20) of the mechanical tripping link (19), and a third articulation spindle (28) of the trip lever (30), which comprises a first arm cooperating with the latch (32), and a second arm separated from the tripping cap (50) of the relay (18) by the resetting lever (44) mounted with free rotation on the second spindle (46).
  2. The auxiliary trip unit according to claim 1, characterized in that the resetting lever (44) is equipped with a damper spring (54) on which a protrusion (56) of the plate (24) acts first when it moves to the unloaded position, the spring (54) being arranged to modulate the resetting force exerted on the cap (50) of the relay (18).
  3. The auxiliary trip unit according to claim 2, characterized in that the damper spring (54) is shaped as a hair-pin preassembled on the resetting lever (44) before the latter is fitted in the second spindle (46) of the case (12).
  4. The auxiliary trip unit according to one of the claims 1 to 3, characterized in that the plate (24) is provided with an indicator flag (66) moving to face a display orifice (68) arranged in the front panel of the case (12) to indicate tripping of the auxiliary unit (10) when the plate (24) is in the stable unloaded position.
  5. The auxiliary trip unit according to one of the claims 1 to 4, characterized in that the resetting lever (44) is associated with a polarization spring (70) urging said lever up against the second arm of the trip lever (30) when the plate (24) is in the loaded position, and that the tripping cap (50) is separated from the resetting lever (44) by a preset distance in the loaded position of the relay (18).
  6. The auxiliary trip unit according to one of the claims 1 to 5, characterized in that the latch (32) comprises a latching lever (31) mounted with limited pivoting on a fourth spindle (34) of the plate (24), and mechanically coupled to the handle (16) by a transmission rod (36).
  7. The auxiliary trip unit according to one of the claims 1 to 6, characterized in that the operating coil of the polarized relay (18) is connected to a differential current detector.
  8. The auxiliary trip unit according to one of the claims 1 to 6, characterized in that the operating coil of the trip relay (18) is controlled by an external remote-control circuit so as to form a shunt trip device MX.
  9. The auxiliary trip unit according to one of the claims 1 to 6, characterized in that the trip relay (18) acts on the operating mechanism (14) according to the value of a voltage to be monitored so as to form an undervoltage trip device MN.
EP89420031A 1988-03-04 1989-02-03 Actuating mechanism of an auxiliary tripping block for a modular circuit breaker Expired - Lifetime EP0331586B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802907A FR2628262B1 (en) 1988-03-04 1988-03-04 CONTROL MECHANISM OF A TRIGGERING AUXILIARY BLOCK FOR MODULAR CIRCUIT BREAKER
FR8802907 1988-03-04

Publications (2)

Publication Number Publication Date
EP0331586A1 EP0331586A1 (en) 1989-09-06
EP0331586B1 true EP0331586B1 (en) 1993-07-07

Family

ID=9363999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420031A Expired - Lifetime EP0331586B1 (en) 1988-03-04 1989-02-03 Actuating mechanism of an auxiliary tripping block for a modular circuit breaker

Country Status (6)

Country Link
EP (1) EP0331586B1 (en)
JP (1) JP2778974B2 (en)
CN (1) CN1021168C (en)
DE (1) DE68907424T2 (en)
FR (1) FR2628262B1 (en)
ZA (1) ZA891136B (en)

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Also Published As

Publication number Publication date
ZA891136B (en) 1989-10-25
JPH0210622A (en) 1990-01-16
EP0331586A1 (en) 1989-09-06
CN1036862A (en) 1989-11-01
CN1021168C (en) 1993-06-09
DE68907424D1 (en) 1993-08-12
DE68907424T2 (en) 1994-02-03
JP2778974B2 (en) 1998-07-23
FR2628262B1 (en) 1995-05-12
FR2628262A1 (en) 1989-09-08

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