EP0665569B1 - Diffential trip unit - Google Patents

Diffential trip unit Download PDF

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Publication number
EP0665569B1
EP0665569B1 EP95410002A EP95410002A EP0665569B1 EP 0665569 B1 EP0665569 B1 EP 0665569B1 EP 95410002 A EP95410002 A EP 95410002A EP 95410002 A EP95410002 A EP 95410002A EP 0665569 B1 EP0665569 B1 EP 0665569B1
Authority
EP
European Patent Office
Prior art keywords
relay
differential
trip unit
circuit breaker
sheath
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95410002A
Other languages
German (de)
French (fr)
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EP0665569A1 (en
Inventor
Claude Burnot
Jean-Paul Cholley
Patrick Guillon
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 Industries SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0665569A1 publication Critical patent/EP0665569A1/en
Application granted granted Critical
Publication of EP0665569B1 publication Critical patent/EP0665569B1/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
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • 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 imbalance of two or more currents or voltages
    • H01H83/226—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 imbalance of two or more currents or voltages with differential transformer
    • 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
    • H01H71/08—Terminals; Connections
    • H01H71/082—Connections between juxtaposed circuit breakers

Definitions

  • a differential trip unit of the kind mentioned is described in document FR-A-2,437,692 of the plaintiff.
  • the relay used is of the polarized type thanks to the use of a permanent magnet whose magnetic flux in the air gap is subtracted from that generated by an electromagnetic coil.
  • the movable frame is formed by a pivoting pallet, and the energy required to trigger is very low, and is produced by the fault current. Such a release does not require an auxiliary power source, but the manufacture of the polarized relay is relatively expensive and complicated.
  • the object of the invention is to produce a differential trip unit using a relay of triggering of simplified structure.
  • the differential trip unit is characterized in that the means excitation of the coil are arranged on an electronic processing circuit having a auxiliary power source, an input connected to the secondary winding of the totalizing transformer, and an output in electrical connection with the coil, and that the trip relay includes positioning means intended to be engaged in conjugate notches in the housing to obtain a game in the inactive position predetermined between the actuating pin and a connection control lug trigger mechanism.
  • the relay positioning means are arranged on a support means in insulating plastic material comprising a tubular sheath on which is wound the coil between two flanges.
  • the support means comprises a monobloc U-shaped structure having two lateral positioning legs extending parallel to each other, and perpendicular to the sheath, and two legs of centering located at the level of the sheath.
  • a differential trip unit 10 is coupled and coupled to a unit two-pole circuit breaker 12 to form a modular differential circuit breaker 14.
  • the mechanism 16 of the differential trip unit 10 is connected to the circuit breaker unit 12 by a mechanical trigger link 18 acting on the common trigger bar 20 of the circuit breaker block 12, for the transmission of a differential trip order.
  • a bracket 22 connects the two levers 24, 26 for actuating the two poles of the circuit breaker block 12.
  • a totalizing transformer 28 In addition to the mechanism 16 inside the differential trip unit 10 (see Figures 2 and 3), a totalizing transformer 28, a test and signaling circuit 29 to test button 30 and trigger indicator 32, an electromagnetic relay 34 trigger, and an electronic processing circuit 36 with auxiliary power source.
  • the summing transformer 28 comprises a magnetic circuit in the form of a toroid crossed by power conductors 38, 40 electrically connected to the lower terminals of the circuit breaker block 12, and constituting the primary winding of transformer 28.
  • a secondary winding 42 is wound on the toroid, and is electrically connected by wires 44 at the input of the electronic circuit 36.
  • the output of the electronic circuit 36 is connected by an electrical connection 46 to the coil 48 of the trip relay 34.
  • the kinematics of the mechanism 16 is similar to that described in detail in the document FR-A-2.437.692, but without the second reset link.
  • the stirrup 22 of the levers 24, 26 is not mechanically coupled to the mechanism 16, being given that the trip relay 34 is a simple coil actuator 48 for transmitting current, without permanent magnet of polarization.
  • the mechanical link 18 for triggering the mechanism 16 comprises a drawer 50 sliding fitted with a control lug 52 arranged opposite the actuating pin 54 trigger relay 34 with interposition of a clearance 55 of less than one millimeter.
  • the trip relay includes a support means 56 made of insulating plastic material having a U-shaped structure, composed of a sheath 58 tubular arranged in the central part, and two lateral legs 60, 62 for positioning extending parallel to each other.
  • the sheath 58 is framed longitudinally by two flanges 64, 66 located in the extension of the legs 60, 62 for housing the coil 48.
  • Inside the bore 68 of the insulating sleeve 58 is slidably mounted axial a magnetic core 70 mechanically coupled to the actuating stud 54.
  • a return spring 72 is interposed between a shoulder 73 of the core 70 and a surface 74 fixed support of the sheath 58 coaxially surrounding the stud 54, so as to bias the core 70 to the inactive position ( Figure 7) when the coil 48 is not excited by the electronic circuit 36.
  • This inactive position is precisely defined at by means of a stop 76 secured to the stud 54 and bearing against a protuberance 78 of the sheath 58.
  • the totalizing transformer 28 issues a trip order to the circuit electronic 36, which causes the excitation of the coil 48 of the relay 34.
  • the core 70 mobile is moved in translation to the active position by compressing the spring 72, and the nipple 54 simultaneously drives the drawer 50 in the same direction for the actuation of the trigger link 18 to the triggered position. Unlocking the snap of the poles of the circuit breaker block 12 then causes the contacts to open.
  • the support means 56 occupies a predetermined place in the trip unit 10 by engaging the ends of the positioning legs 60, 62 in a first pair of notches 80, 82 ( Figures 2 and 3) formed in the housing 84 insulating.
  • a second pair of notches 86, 88 ( Figure 3) is provided in the housing 84 for receive centering tabs 90, 92 ( Figure 4) located at the sleeve 58.
  • the setting in place of the support means 56 in the four support points defined by the notches 80, 82, 86, 88 ensures the precise positioning of the trip relay 34 relative to the mechanism 16, making it possible to automatically obtain the desired clearance 55 in the inactive position.
  • At least one 90 (FIG. 4) of the centering tabs has a lug 96 intended to snap onto a rim of the notch 86 to secure the captive attachment of the means support 56 on the housing 84.
  • the positioning leg 60 is equipped with a protuberance, in which is arranged a shoulder 98 intended to promote the maintenance support medium stable 56.
  • a spring 100 is interposed between the inner wall of the housing 84 and the end of drawer 50 so as to urge drawer 50 in the tripping direction, against of the action of the reset spring (not shown). This polarization of the drawer 50 by the spring 100 makes it possible to obtain a function for memorizing the state of the trigger indicator 32.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Control Of Multiple Motors (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

The differential circuit breaker trip unit (10) is coupled to a multi-polar circuit breaker to form a complete modular differential circuit breaker assembly. The trip unit is housed in an insulated enclosure (84). The enclosure houses a differential current detector formed by a summing transformer (28) in the form of a toroid traversed by the power conductors (38,40) that constitute the primary winding. A mechanism (16) activated by an electromagnetic relay (34) transmits the trip signal to the circuit breaker block, through mechanical trip lever. The relay is excited when the voltage at the secondary winding (42) of the summing transformer (28) passes a set threshold. The relay is activated through an electronic circuit (36).

Description

L'invention est relative à un bloc déclencheur différentiel destiné à être accolé et accouplé à un bloc disjoncteur multipolaire pour constituer un disjoncteur différentiel modulaire, ledit bloc déclencheur étant logé dans un boítier isolant renfermant :

  • un détecteur de courant différentiel comprenant un transformateur totalisateur en forme de tore traversé par des conducteurs de puissance constituant l'enroulement primaire,
  • un mécanisme de commande piloté par un relais électromagnétique de déclenchement à téton d'actionnement pour transmettre en position active un ordre de déclenchement du relais au bloc disjoncteur par l'intermédiaire d'une liaison mécanique de déclenchement ,
  • des moyens d'excitation de la bobine du relais lorsque la tension aux bornes de l'enroulement secondaire du transformateur totalisateur dépasse un seuil prédéterminé,
  • et un circuit d'essai et de signalisation à bouton test et à indicateur de déclenchement.
The invention relates to a differential trip unit intended to be attached to and coupled to a multipole circuit breaker unit to constitute a modular differential circuit breaker, said trip unit being housed in an insulating housing containing:
  • a differential current detector comprising a totalizing transformer in the form of a toroid crossed by power conductors constituting the primary winding,
  • a control mechanism controlled by an electromagnetic tripping relay with an actuating pin for transmitting in the active position a tripping order from the relay to the circuit breaker block via a mechanical tripping link,
  • means for energizing the relay coil when the voltage across the secondary winding of the summation transformer exceeds a predetermined threshold,
  • and a test and signaling circuit with test button and trip indicator.

Un bloc déclencheur différentiel du genre mentionné est décrit dans le document FR-A-2.437.692 de la demanderesse. Le relais utilisé est du type polarisé grâce à l'usage d'un aimant permanent dont le flux magnétique dans l'entrefer se soustrait de celui engendré par une bobine électromagnétique. L'armature mobile est formée par une palette pivotante, et l'énergie nécessaire pour assurer le déclenchement est très réduite, et est produite par le courant de défaut. Un tel déclencheur ne nécessite pas de source d'alimentation auxiliaire, mais la fabrication du relais polarisé est relativement coûteuse et compliquée.A differential trip unit of the kind mentioned is described in document FR-A-2,437,692 of the plaintiff. The relay used is of the polarized type thanks to the use of a permanent magnet whose magnetic flux in the air gap is subtracted from that generated by an electromagnetic coil. The movable frame is formed by a pivoting pallet, and the energy required to trigger is very low, and is produced by the fault current. Such a release does not require an auxiliary power source, but the manufacture of the polarized relay is relatively expensive and complicated.

L'objet de l'invention consiste à réaliser un bloc déclencheur différentiel utilisant un relais de déclenchement de structure simplifiée.The object of the invention is to produce a differential trip unit using a relay of triggering of simplified structure.

Le bloc déclencheur différentiel selon l'invention est caractérisé en ce que les moyens d'excitation de la bobine sont agencés sur un circuit électronique de traitement ayant une source d'alimentation auxiliaire, une entrée connectée à l'enroulement secondaire du transformateur totalisateur , et une sortie en liaison électrique avec la bobine, et que le relais de déclenchement comporte des moyens de positionnement destinés à être engagés dans des encoches conjuguées du boítier pour obtenir en position inactive un jeu prédéterminé entre le téton d'actionnement et un ergot de commande de la liaison mécanique de déclenchement . The differential trip unit according to the invention is characterized in that the means excitation of the coil are arranged on an electronic processing circuit having a auxiliary power source, an input connected to the secondary winding of the totalizing transformer, and an output in electrical connection with the coil, and that the trip relay includes positioning means intended to be engaged in conjugate notches in the housing to obtain a game in the inactive position predetermined between the actuating pin and a connection control lug trigger mechanism.

Les moyens de positionnement du relais sont agencés sur un moyen de support en matériau plastique isolant comprenant un fourreau tubulaire sur lequel est enroulée la bobine entre deux flasques.The relay positioning means are arranged on a support means in insulating plastic material comprising a tubular sheath on which is wound the coil between two flanges.

Selon un mode de réalisation préférée de l'invention, le moyen de support comporte une structure monobloc en U ayant deux jambes latérales de positionnement s'étendant parallèlement l'une à l'autre, et perpendiculairement au fourreau , et deux pattes de centrage situées au niveau du fourreau .According to a preferred embodiment of the invention, the support means comprises a monobloc U-shaped structure having two lateral positioning legs extending parallel to each other, and perpendicular to the sheath, and two legs of centering located at the level of the sheath.

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 disjoncteur différentiel modulaire selon l'invention;
  • la figure 2 montre une vue en perspective du bloc déclencheur différentiel de la figure 1 après enlèvement du couvercle;
  • la figure 3 représente une vue de face de la figure 2, après enlèvement du transformateur totalisateur, et de la carte électronique dans la partie basse du boítier.
  • la figure 4 est une vue en perspective à échelle agrandie du support du relais de déclenchement;
  • la figure 5 est une vue en perspective éclatée du relais de déclenchement;
  • la figure 6 montre une vue du relais de la figure 5 après assemblage des pièces;
  • la figure 7 est une vue en coupe selon la ligne 7-7 de la figure 3.
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 modular differential circuit breaker according to the invention;
  • Figure 2 shows a perspective view of the differential release unit of Figure 1 after removal of the cover;
  • Figure 3 shows a front view of Figure 2, after removal of the totalizing transformer, and the electronic card in the lower part of the housing.
  • FIG. 4 is a perspective view on an enlarged scale of the support of the trip relay;
  • Figure 5 is an exploded perspective view of the trip relay;
  • Figure 6 shows a view of the relay of Figure 5 after assembly of the parts;
  • FIG. 7 is a sectional view along line 7-7 of FIG. 3.

Sur la figure 1, un bloc déclencheur différentiel 10 est accolé et accouplé à un bloc disjoncteur 12 bipolaire pour constituer un disjoncteur différentiel 14 modulaire. Le mécanisme 16 du bloc déclencheur différentiel 10 est relié au bloc disjoncteur 12 par une liaison mécanique de déclenchement 18 agissant sur la barre de déclenchement 20 commune du bloc disjoncteur 12, pour la transmission d'un ordre de déclenchement différentiel. Un étrier 22 relie les deux manettes 24, 26 d'actionnement des deux pôles du bloc disjoncteur 12. In FIG. 1, a differential trip unit 10 is coupled and coupled to a unit two-pole circuit breaker 12 to form a modular differential circuit breaker 14. The mechanism 16 of the differential trip unit 10 is connected to the circuit breaker unit 12 by a mechanical trigger link 18 acting on the common trigger bar 20 of the circuit breaker block 12, for the transmission of a differential trip order. A bracket 22 connects the two levers 24, 26 for actuating the two poles of the circuit breaker block 12.

A l'intérieur du bloc déclencheur différentiel 10 se trouvent en plus du mécanisme 16 (voir figures 2 et 3), un transformateur totalisateur 28, un circuit d'essai et de signalisation 29 à bouton test 30 et à indicateur 32 de déclenchement, un relais 34 électromagnétique de déclenchement, et un circuit électronique 36 de traitement à source d'alimentation auxiliaire.In addition to the mechanism 16 inside the differential trip unit 10 (see Figures 2 and 3), a totalizing transformer 28, a test and signaling circuit 29 to test button 30 and trigger indicator 32, an electromagnetic relay 34 trigger, and an electronic processing circuit 36 with auxiliary power source.

Le transformateur totalisateur 28 comporte un circuit magnétique en forme de tore traversé par des conducteurs 38, 40 de puissance connectés électriquement aux bornes inférieures du bloc disjoncteur 12, et constituant l'enroulement primaire du transformateur 28. Un enroulement secondaire 42 est bobiné sur le tore, et est connecté électriquement par des fils 44 à l'entrée du circuit électronique 36. La sortie du circuit électronique 36 est branchée par une liaison électrique 46 à la bobine 48 du relais de déclenchement 34.The summing transformer 28 comprises a magnetic circuit in the form of a toroid crossed by power conductors 38, 40 electrically connected to the lower terminals of the circuit breaker block 12, and constituting the primary winding of transformer 28. A secondary winding 42 is wound on the toroid, and is electrically connected by wires 44 at the input of the electronic circuit 36. The output of the electronic circuit 36 is connected by an electrical connection 46 to the coil 48 of the trip relay 34.

La cinématique du mécanisme 16 est similaire à celle décrite en détail dans le document FR-A-2.437.692, mais sans la deuxième liaison de réarmement. On remarque en effet que l'étrier 22 des manettes 24, 26 n'est pas accouplé mécaniquement au mécanisme 16, étant donné que le relais de déclenchement 34 est un simple actionneur à bobine 48 d'émission de courant, sans aimant permanent de polarisation.The kinematics of the mechanism 16 is similar to that described in detail in the document FR-A-2.437.692, but without the second reset link. We notice indeed that the stirrup 22 of the levers 24, 26 is not mechanically coupled to the mechanism 16, being given that the trip relay 34 is a simple coil actuator 48 for transmitting current, without permanent magnet of polarization.

La liaison mécanique 18 de déclenchement du mécanisme 16 comporte un tiroir 50 coulissant équipé d'un ergot 52 de commande disposé en regard du téton 54 d'actionnement du relais de déclenchement 34 avec interposition d'un jeu 55 inférieur à un millimètre.The mechanical link 18 for triggering the mechanism 16 comprises a drawer 50 sliding fitted with a control lug 52 arranged opposite the actuating pin 54 trigger relay 34 with interposition of a clearance 55 of less than one millimeter.

En référence aux figures 4 à 7, le relais de déclenchement comporte un moyen de support 56 en matériau plastique isolant ayant une structure en U, composée d'un fourreau 58 tubulaire agencé dans la partie centrale, et deux jambes latérales 60, 62 de positionnement s'étendant parallèlement l'une à l'autre. Le fourreau 58 est encadré longitudinalement par deux flasques 64, 66 situées dans le prolongement des jambes 60, 62 pour le logement de la bobine 48. A l'intérieur de l'alésage 68 du fourreau 58 isolant est monté à coulissement axial un noyau magnétique 70 accouplé mécaniquement au téton 54 d'actionnement. Un ressort de rappel 72 est interposé entre un épaulement 73 du noyau 70 et une surface d'appui 74 fixe du fourreau 58 en entourant coaxialement le téton 54, de manière à solliciter le noyau 70 vers la position inactive (figure 7) lorsque la bobine 48 n'est pas excitée par le circuit électronique 36. Cette position inactive est définie avec précision au moyen d'une butée 76 solidaire du téton 54 et venant en appui contre une protubérance 78 du fourreau 58. With reference to FIGS. 4 to 7, the trip relay includes a support means 56 made of insulating plastic material having a U-shaped structure, composed of a sheath 58 tubular arranged in the central part, and two lateral legs 60, 62 for positioning extending parallel to each other. The sheath 58 is framed longitudinally by two flanges 64, 66 located in the extension of the legs 60, 62 for housing the coil 48. Inside the bore 68 of the insulating sleeve 58 is slidably mounted axial a magnetic core 70 mechanically coupled to the actuating stud 54. A return spring 72 is interposed between a shoulder 73 of the core 70 and a surface 74 fixed support of the sheath 58 coaxially surrounding the stud 54, so as to bias the core 70 to the inactive position (Figure 7) when the coil 48 is not excited by the electronic circuit 36. This inactive position is precisely defined at by means of a stop 76 secured to the stud 54 and bearing against a protuberance 78 of the sheath 58.

En cas d'apparition d'un défaut d'isolement sur le réseau protégé par le disjoncteur différentiel 14, le transformateur totalisateur 28 émet un ordre de déclenchement au circuit électronique 36, lequel provoque l'excitation de la bobine 48 du relais 34. Le noyau 70 mobile est déplacé en translation vers la position active en comprimant le ressort 72, et le téton 54 entraíne simultanément le tiroir 50 dans le même sens pour l'actionnement de la liaison de déclenchement 18 vers la position déclenchée. Le déverrouillage de l'accrochage des pôles du bloc disjoncteur 12 provoque alors l'ouverture des contacts.In the event of an insulation fault appearing on the network protected by the circuit breaker differential 14, the totalizing transformer 28 issues a trip order to the circuit electronic 36, which causes the excitation of the coil 48 of the relay 34. The core 70 mobile is moved in translation to the active position by compressing the spring 72, and the nipple 54 simultaneously drives the drawer 50 in the same direction for the actuation of the trigger link 18 to the triggered position. Unlocking the snap of the poles of the circuit breaker block 12 then causes the contacts to open.

L'ajustage du jeu 55 axial entre le téton 54 et l'ergot 52 de commande du tiroir de déclenchement 50 lorsque le relais 34 se trouve en position inactive, nécessite un positionnement correct du relais 34 par rapport au mécanisme 16 du bloc déclencheur différentiel 10. A cet effet, le moyen support 56 occupe une place prédéterminée dans le bloc déclencheur 10 grâce à l'engagement des extrémités des jambes de positionnement 60, 62 dans une première paire d'encoches 80, 82 (figures 2 et 3) ménagée dans le boítier 84 isolant. Une deuxième paire d'encoches 86, 88 (figure 3) est prévue dans le boítier 84 pour recevoir des pattes de centrage 90, 92 (figure 4) situées au niveau du fourreau 58. La mise en place du moyen support 56 dans les quatre points d'appui définis par les encoches 80, 82, 86, 88 assure le positionnement précis du relais 34 de déclenchement par rapport au mécanisme 16, permettant d'obtenir automatiquement le jeu 55 souhaité en position inactive.The adjustment of the axial clearance 55 between the stud 54 and the lug 52 of the drawer control trip 50 when relay 34 is in the inactive position, requires a correct positioning of relay 34 relative to mechanism 16 of the trip unit differential 10. For this purpose, the support means 56 occupies a predetermined place in the trip unit 10 by engaging the ends of the positioning legs 60, 62 in a first pair of notches 80, 82 (Figures 2 and 3) formed in the housing 84 insulating. A second pair of notches 86, 88 (Figure 3) is provided in the housing 84 for receive centering tabs 90, 92 (Figure 4) located at the sleeve 58. The setting in place of the support means 56 in the four support points defined by the notches 80, 82, 86, 88 ensures the precise positioning of the trip relay 34 relative to the mechanism 16, making it possible to automatically obtain the desired clearance 55 in the inactive position.

Au moins une 90 (figure 4) des pattes de centrage est dotée d'un ergot 96 destiné à s'encliqueter sur un rebord de l'encoche 86 pour assurer la fixation imperdable du moyen support 56 sur le boítier 84. La jambe de positionnement 60 est équipée d'une protubérance, dans laquelle est agencé un épaulement 98 destiné à favoriser le maintien stable du moyen support 56.At least one 90 (FIG. 4) of the centering tabs has a lug 96 intended to snap onto a rim of the notch 86 to secure the captive attachment of the means support 56 on the housing 84. The positioning leg 60 is equipped with a protuberance, in which is arranged a shoulder 98 intended to promote the maintenance support medium stable 56.

Sur la figure 7, un ressort 100 est intercalé entre la paroi interne du boítier 84 et l'extrémité du tiroir 50 de manière à solliciter le tiroir 50 dans le sens du déclenchement, à l'encontre de l'action du ressort de réarmement (non représenté). Cette polarisation du tiroir 50 par le ressort 100 permet d'obtenir une fonction de mémorisation de l'état de l'indicateur 32 de déclenchement.In Figure 7, a spring 100 is interposed between the inner wall of the housing 84 and the end of drawer 50 so as to urge drawer 50 in the tripping direction, against of the action of the reset spring (not shown). This polarization of the drawer 50 by the spring 100 makes it possible to obtain a function for memorizing the state of the trigger indicator 32.

Il est clair que l'effet de centrage tridimensionnel du relais 34 de déclenchement par rapport au mécanisme 16 du bloc déclencheur différentiel 10 pourrait être obtenu par un moyen support 56 de forme différente à celle décrite précédemment.It is clear that the three-dimensional centering effect of the trip relay 34 relative to to the mechanism 16 of the differential trip unit 10 could be obtained by a means support 56 of a different shape to that described above.

Claims (7)

  1. A differential trip unit (10) designed to be adjoined and coupled to a multipole circuit breaker unit (12) to form a modular differential circuit breaker (14), said trip unit (10) being housed in an insulating case (84) containing :
    a differential current detector comprising a summing transformer (28) in the form of a toroid through which power conductors (38, 40) forming the primary winding pass,
    an operating mechanism (16) controlled by an electromagnetic trip relay (34) with an actuating pin (54) to transmit in the active position a tripping order of the relay (34) to the circuit breaker unit (12) via a mechanical tripping link (18),
    means for excitation of the coil (48) of the relay (34) when the voltage at the terminals of the secondary winding (42) of the summing transformer (28) exceeds a preset threshold,
    and a test and signalling circuit (29) with test button (30) and tripping indicator (32),
    characterized in that the means for excitation of the coil (48) are arranged on an electronic processing circuit (36) having an auxiliary power source, an input connected to the secondary winding (42) of the summing transformer (28), and an output in electrical connection with the coil (48), and that the trip relay (16) comprises positioning means (60, 62; 90, 92) designed to be engaged in conjugate notches (80, 82; 86, 88) of the case (84) to obtain in the inactive position a preset clearance (55) between the actuating pin (54) and an operating spigot (52) of the mechanical tripping link (18).
  2. The differential trip unit according to claim 1, characterized in that the positioning means of the relay (34) are arranged on a support means (56) made of insulating plastic material comprising a tubular sheath (58) on which the coil (48) is wound between two flanges (64, 66).
  3. The differential trip unit according to claim 2, characterized in that the sheath (58) is equipped with a bore (68) inside which a magnetic core (70) mechanically coupled to the actuating pin (54) is mounted with axial sliding, and that a return spring (72) is fitted in the bore (68) interposed between a shoulder (73) of the core (70) and a bearing surface (74) of the sheath (58).
  4. The differential trip unit according to claim 2 or 3, characterized in that the support means (56) comprises a U-shaped monobloc structure having two lateral positioning legs (60, 62) extending parallel to one another, and perpendicularly to the sheath (58), and two centering lugs (90, 92) situated at the level of the sheath (58).
  5. The differential trip unit according to claim 4, characterized in that at least one (90) of the centering lugs is provided with a clipping spigot (96).
  6. The differential trip unit according to claim 2 or 3, characterized in that the actuating pin (54) of the relay (34) comprises a stop (76) coming up against a protuberance (78) of the sheath (58) in the inactive position of the magnetic core (70).
  7. The differential trip unit according to claim 1, characterized in that the operating spigot (52) of the mechanical tripping link is arranged on a movable rack (50) urged by a spring (100) in the tripping direction.
EP95410002A 1994-01-26 1995-01-11 Diffential trip unit Expired - Lifetime EP0665569B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400927 1994-01-26
FR9400927A FR2715517B1 (en) 1994-01-26 1994-01-26 Differential trip unit.

Publications (2)

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EP0665569A1 EP0665569A1 (en) 1995-08-02
EP0665569B1 true EP0665569B1 (en) 2000-03-22

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EP95410002A Expired - Lifetime EP0665569B1 (en) 1994-01-26 1995-01-11 Diffential trip unit

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EP (1) EP0665569B1 (en)
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CN (1) CN1048115C (en)
AT (1) ATE191099T1 (en)
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DE (1) DE69515711T2 (en)
ES (1) ES2144592T3 (en)
FR (1) FR2715517B1 (en)

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US6472620B2 (en) 2000-03-17 2002-10-29 Ge Power Controls France Sas Locking arrangement for circuit breaker draw-out mechanism
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US6496347B1 (en) 2000-03-08 2002-12-17 General Electric Company System and method for optimization of a circuit breaker mechanism
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US6559743B2 (en) 2000-03-17 2003-05-06 General Electric Company Stored energy system for breaker operating mechanism
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US6710988B1 (en) 1999-08-17 2004-03-23 General Electric Company Small-sized industrial rated electric motor starter switch unit
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US6804101B2 (en) 2001-11-06 2004-10-12 General Electric Company Digital rating plug for electronic trip unit in circuit breakers
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IE920641A1 (en) * 1991-03-27 1992-10-07 Westinghouse Electric Corp Dual wound trip solenoid
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US6225881B1 (en) 1998-04-29 2001-05-01 General Electric Company Thermal magnetic circuit breaker
US6114641A (en) 1998-05-29 2000-09-05 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
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US6087913A (en) 1998-11-20 2000-07-11 General Electric Company Circuit breaker mechanism for a rotary contact system
US6166344A (en) 1999-03-23 2000-12-26 General Electric Company Circuit breaker handle block
US6400543B2 (en) 1999-06-03 2002-06-04 General Electric Company Electronic trip unit with user-adjustable sensitivity to current spikes
US6262872B1 (en) 1999-06-03 2001-07-17 General Electric Company Electronic trip unit with user-adjustable sensitivity to current spikes
US6268991B1 (en) 1999-06-25 2001-07-31 General Electric Company Method and arrangement for customizing electronic circuit interrupters
US6218917B1 (en) 1999-07-02 2001-04-17 General Electric Company Method and arrangement for calibration of circuit breaker thermal trip unit
US6188036B1 (en) 1999-08-03 2001-02-13 General Electric Company Bottom vented circuit breaker capable of top down assembly onto equipment
US6710988B1 (en) 1999-08-17 2004-03-23 General Electric Company Small-sized industrial rated electric motor starter switch unit
US6252365B1 (en) 1999-08-17 2001-06-26 General Electric Company Breaker/starter with auto-configurable trip unit
US6175288B1 (en) 1999-08-27 2001-01-16 General Electric Company Supplemental trip unit for rotary circuit interrupters
US6396369B1 (en) 1999-08-27 2002-05-28 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
US6232570B1 (en) 1999-09-16 2001-05-15 General Electric Company Arcing contact arrangement
US6326869B1 (en) 1999-09-23 2001-12-04 General Electric Company Clapper armature system for a circuit breaker
US6229413B1 (en) 1999-10-19 2001-05-08 General Electric Company Support of stationary conductors for a circuit breaker
US6317018B1 (en) 1999-10-26 2001-11-13 General Electric Company Circuit breaker mechanism
US6232856B1 (en) 1999-11-02 2001-05-15 General Electric Company Magnetic shunt assembly
US6377144B1 (en) 1999-11-03 2002-04-23 General Electric Company Molded case circuit breaker base and mid-cover assembly
US6262642B1 (en) 1999-11-03 2001-07-17 General Electric Company Circuit breaker rotary contact arm arrangement
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Also Published As

Publication number Publication date
CN1048115C (en) 2000-01-05
CN1111805A (en) 1995-11-15
FR2715517A1 (en) 1995-07-28
KR950034346A (en) 1995-12-28
EP0665569A1 (en) 1995-08-02
BR9500317A (en) 1995-10-17
ATE191099T1 (en) 2000-04-15
DE69515711D1 (en) 2000-04-27
FR2715517B1 (en) 1996-03-22
ES2144592T3 (en) 2000-06-16
DE69515711T2 (en) 2000-08-31

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