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EP0218497B1 - Protective circuit breaker with a resilient link - Google Patents

Protective circuit breaker with a resilient link Download PDF

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Publication number
EP0218497B1
EP0218497B1 EP86401923A EP86401923A EP0218497B1 EP 0218497 B1 EP0218497 B1 EP 0218497B1 EP 86401923 A EP86401923 A EP 86401923A EP 86401923 A EP86401923 A EP 86401923A EP 0218497 B1 EP0218497 B1 EP 0218497B1
Authority
EP
European Patent Office
Prior art keywords
hook
contact
lever
tripping
spring
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
EP86401923A
Other languages
German (de)
French (fr)
Other versions
EP0218497A1 (en
Inventor
Dominique Beurdeley
Bernard Bizard
Pierre Merlin
Lucien Sauthier
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT86401923T priority Critical patent/ATE50663T1/en
Publication of EP0218497A1 publication Critical patent/EP0218497A1/en
Application granted granted Critical
Publication of EP0218497B1 publication Critical patent/EP0218497B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H01H71/402—Combined electrothermal and electromagnetic mechanisms in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism
    • 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

Definitions

  • EP-A-28 958 discloses a switch of a type similar to that previously mentioned, which comprises a trigger lever connected to a contact part by means of an elastic transmission link between the lever. and the contact part, so as to contribute to the interruption of the electric current between the movable contact and the fixed contact.
  • patent EP-A-18 553 discloses a switch in which, in order to compensate for a parasitic play between the core of the magnetic trip device and a hook control rod, on which the bimetallic strip acts, the core is stressed by a spring so as to remain in contact with the rod, at the start of the bimetal deflection.
  • the object of the present invention is in particular to give a protection switch of the type mentioned above great simplicity of design and assembly, while retaining a small footprint for the lock-manual control member assembly.
  • Another purpose is to provide a protection switch with high trigger sensitivity.
  • An additional spring may be provided to contribute to the opening of the contact piece, but this opening is preferably produced by the aforementioned single elastic link.
  • the contact piece is advantageously pivotally mounted on a pin which is fixed relative to the housing, the elastic link cooperating with at least one support provided on the contact piece to keep the latter applied to the fixed pin.
  • the fixed support is part of a rigid and electrically conductive part integral with one of the terminals of the switch, the spring makes it possible to ensure a satisfactory electrical connection between the terminal and the contact part without requiring braid or other flexible conductive medium.
  • the hook can advantageously constitute a lifter interposed between the core of the magnetic trip device and the bimetallic strip of the thermal trip device and arranged so that the beginning of deflection of the bimetallic strip causes a slight pivoting of the hook and a slight plunging of the core.
  • a return spring associated with the core of the magnetic trigger preferably constitutes a means for returning the hook to its position for hooking the spoiler.
  • the switch 10 comprises a manual control member M constituted by a rotary button of axis 01 and an automatic trigger member D provided with a magnetic trigger DM and a thermal trigger DT; the members M and D are mounted in the housing and are capable of separating the contact C1 from the contact C2 and therefore of opening the current path B1, B2 by means of a lock in response to the detection of an electrical fault via DM or DT triggers or respectively in response to a manual command.
  • An interrupting chamber A is bordering on the contacts C1, C2.
  • the output element of the triggering member D is a hook 12 rotatably mounted about a fixed axis 02 relative to the housing and cooperating by a fork 13 which has two fingers 13a and 13b with a stock 14 with respective surfaces d 'support 14a and 14b.
  • the butt 14 is located at the end of a plunger core 15 of the magnetic trip device DM.
  • the hook 12 further cooperates by means of a finger 16 with a deformable bimetal lever 17 of the thermal trip device DT.
  • the lock comprises a trigger lever 18 in the form of a pendulum made of insulating material.
  • the lever 18 is directly mounted on a tenon 19 of the manual member M and has, for this purpose, a slide 20 slightly inclined (FIG. 1), or even parallel (FIG. 2), with respect to the front face 21 of the circuit breaker, and cooperating with said stud.
  • the tenon 19 is movable from a position X1 to a position X2 and vice versa, while the slide 20 is curved at 20a at its right end ( Figure 3).
  • the lever 18 comprises, at a first end, a spoiler 22 resting on a support 23 of the hook (FIG. 6), this support being erasable as a result of the pivoting of the hook to allow tilting of the lever 18 in response to an electrical fault detected by the DM or DT trigger.
  • the lever 18 comprises, towards its second open end or head 24, a guide groove 25 substantially perpendicular to the face 21 and cooperating with a guide pin 26 formed in the housing.
  • a fulcrum or anchor point 27 is provided for a pin-shaped spring R in the shape of a V.
  • the first branch 28 of the spring R is thus applied to the movable anchor point 27 in order to tend to tilt the lever 18 clockwise; the second branch 29 of the spring R is rotatably attached to a pin 30a formed on a rigid conductive part 30 which is fixed relative to the housing and which is secured to the terminal 81.
  • the branch 29 is first applied to its end on a closing support 31 of a contact piece 32 separated from the lever 18 and constituting or carrying the contact C1, secondly applicable near the tip of the V on an opening support 36 of the piece 32, the supports 31 and 36 being located on either side of the fixed pin 30a.
  • the application of the branch 29 on the closing support 31 ensures the closing of the contact C1 and its pressure on the contact C2; the application of the branch 29 on the opening support 36 allowing the opening of the contact C1.
  • the direction of rotation of the contact piece C1 depends on the application of the differential force of the branch 29 on one or the other support 31, 36, this being a function of the position of the anchoring point 27 of branch 28.
  • the manual control button M has a manual grip 33, the pin 19 is located substantially opposite the grip 33 relative to the axis 01 and at a distance from this axis allowing amplification of effort.
  • a return spring 34 is associated with the button M to assist the latter during a manual opening command and to call it back to the stop position during a trip on fault.
  • the magnetic trigger DM includes a spring 35 urging the core 15 so that the butt 14 of the latter pushes the finger 13a of the hook 12 in order to rap peel it in the armed position of figures 1 and 6.
  • the hook 12 advantageously constitutes a spreader interposed between the magnetic core 15 and the bimetallic strip 17, so that the beginning of deflection of the bimetallic strip causes a very slight counterclockwise pivoting of the hook and therefore a slight plunge of the core. In this way, the trigger intensity threshold of the DM trigger is lowered; an overload detected by the bimetallic strip of the thermal release therefore causes greater sensitivity of the magnetic release.
  • the finger 16 of the hook has an extension 37 located behind the bimetallic strip and provided with marks 16a which facilitate the adjustment of the bimetallic strip.
  • the manual control button M in abutment on the housing occupies a position such that its lug 19 is in the position denoted X1 at the right end 20a of the slide 20.
  • the spoiler 22 of the lever 18 is hooked on the support 23 of the hook 12, which is held in the position indicated in FIG. 1 by the spring 35 of the magnetic trip device DM.
  • the spring R biases the lever 18 to make it tilt clockwise around the hinge pin 19, but is prevented by the above attachment.
  • the upper end of the groove 25 of the lever 18 is against the guide pin 26.
  • the hook 12 pivots counterclockwise and its bearing surface 23 emerges from the spoiler 22 by releasing the lever 18 (FIG. 7).
  • the latter pivots clockwise around the tenon 19 then occupying position X1 under the effect of the upward stress exerted by the spring R on its anchor point 27.
  • the branch 28 of the spring rises; the branch 29 which is integral therewith is entrained and comes to bear on the drive support 36 provided on the contact piece 32 and rotates the latter abruptly clockwise to open the contact CI.
  • the user manually controls the button M to bring it by clockwise pivoting around 01 from its position in FIG. 1 to the position in FIG. 2, that is to say for carrying the post 19 from position X1 to position X2.
  • the hook 12 remains stationary and the spoiler located at the right end of the lever 18 remains hooked on the support 22, the latter therefore serving as a tipping point for the lever.
  • the hook is reset automatically under the effect of the return of the magnetic core to its upper position. It is sufficient to reset the switch by turning the manual control button counterclockwise around the axis 01 from the "off" position (figure 2) to the "on” position (figure 1); the lever 18 and the branch 28 are thus lowered spring, so that the branch 29 requests the closing support 31 of the contact piece 32 until C1 is applied to C2; the detachment of the branch 29 from the drive support 36 authorizes the contact pressure overtravel.
  • the spoiler 22 comes to hang on its support 23. At the end of rearming, the tenon 19 is housed in the curved end 20a of the slide 20, so that the button M is forced to remain in the on position.
  • a trigger display element can be provided on the head 24 of the lever 18 so that its displacement opposite a window formed in the recess of the front face 21 of the housing signals the trigger.
  • Marks 16a are advantageously provided on the finger 16 of the bimetallic strip 17 in order to assist an operator during the process of adjusting the bimetallic strip.
  • the manual control member M shown in the form of a pivoting button, could be produced in the form of a pusher.
  • the actuation of the organ M can be carried out at from a polar device or additive close to the protection switch considered.
  • the described elastic link constitutes the only means of mechanical interaction between the pivoting trigger lever and the contact part.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1. Protection switch for an electric installation comprising, in an insulating case (11) : - at least one fixed contact (C2) and a mobile contact (C1) which cooperate and form a current path which can be interrupted in response : - either to the actuation of a magnetic (DM) and/or thermal (DT) automatic tripping member, - or to the actuation of a manuel tripping and resetting control member (M), - a lock comprising : - a hook (12) which can be moved by the automatic tripping member (DM, DT), - a tripping lever (18) having at a first end a nose-piece (22) cooperating with the hook (12) and connected to the manuel control member (M) so as to pivot, either by bearing on the hook (12) so as to cause voluntary opening of the contacts or on a mowable shaft (19) connected to the manual control member (M) for causing automatic tripping ; this tripping lever (18) being connected to a contact piece (32) mounted for pivoting on a pin (30a) belonging to a rigid conducting piece (30) fixed with respect to the case (11) and fast with a terminal (B1) of the switch, by means of a spring (R) forming a resilient transmission link between the lever (18) and the contact piece (32) and contributing to sudden opening of the contact piece (32) characterized in that the resilient link (R) consists of a hairpin spring in the shape of a V, a first leg (28) of which is applied to a second end of the tripping lever (18) and the other leg (29) of which cooperates with two rests situated on each side of the pin (30a), namely an opening rest (36) and a closure rest (31).

Description

La présente invention concerne un interrupteur de protection pour installation électrique, comprenant dans un boîtier isolant:

  • - au moins un contact fixe et un contact mobile coopérant pour former un chemin de courant interruptible en réponse:
  • . soit à l'actionnement d'un organe magnétique et/ou thermique de déclenchement automatique sur défaut,
  • . soit à l'actionnement d'un organe de commande manuelle de déclenchement et de réarmement,
  • - une serrure comprenant:
  • . un crochet déplaçable par l'organe de déclenchement sur défaut,
  • . un levier de déclenchement muni à une première extrémité d'un becquet coopérant avec le crochet et relié à l'organe de commande manuelle, de manière à pivoter, soit en prenant appui sur le crochet pour effectuer une ouverture volontaire des contacts, soit sur un axe déplaçable relié à l'organe de commande manuelle pour effectuer un déclenchement automatique.

Un tel interrupteur de protection est décrit dans la demande de brevet EP-0 047 847. Cet interrupteur présente un ressort de traction ancré, d'une part, sur l'organe de commande manuelle en un point excentré de celui-ci et, d'autre part, sur une pièce de contact elle-même articulée par rapport au levier de déclenchement. Le dispositif en question nécessite un ressort soigneusement calibré et positionné, ainsi qu'une liaison cinématique triangulaire organe manuel-levier, organe manuel-pièce de contact et levier-pièce de contact; un ancrage et un guidage doivent, de plus, être prévus pour le ressort dans l'organe de commande manuelle et nécessitent un surdimension- nement de ce dernier.The present invention relates to a protective switch for electrical installation, comprising in an insulating housing:
  • - at least one fixed contact and one movable contact cooperating to form an interruptible current path in response:
  • . either on the actuation of a magnetic and / or thermal organ for automatic tripping on fault,
  • . either the actuation of a manual triggering and resetting control member,
  • - a lock comprising:
  • . a hook movable by the trip device on fault,
  • . a trigger lever provided at one end with a spoiler cooperating with the hook and connected to the manual control member, so as to pivot, either by bearing on the hook to effect voluntary opening of the contacts, or on a movable axis connected to the manual control member to carry out an automatic release.

Such a protective switch is described in patent application EP-0 047 847. This switch has a tension spring anchored, on the one hand, on the manual control member at an eccentric point thereof and, d on the other hand, on a contact piece itself articulated with respect to the trigger lever. The device in question requires a carefully calibrated and positioned spring, as well as a triangular kinematic connection of the manual member-lever, manual member-contact piece and lever-contact piece; an anchorage and a guide must also be provided for the spring in the manual control member and require oversizing of the latter.

Par ailleurs, on connaît par le brevet EP-A-28 958 un interrupteur d'un type similaire à celui précédemment évoqué, qui comporte un levier de déclenchement relié à une pièce de contact au moyen d'une biellette élastique de transmission entre le levier et la pièce de contact, de manière à contribuer à l'interruption du courant électrique entre le contact mobile et le contact fixe.Furthermore, EP-A-28 958 discloses a switch of a type similar to that previously mentioned, which comprises a trigger lever connected to a contact part by means of an elastic transmission link between the lever. and the contact part, so as to contribute to the interruption of the electric current between the movable contact and the fixed contact.

En outre, le brevet EP-A-18 553 divulgue un interrupteur dans lequel, en vue de rattraper un jeu parasite entre le noyau du déclencheur magnétique et une tige de commande du crochet, sur laquelle agit le bilame, le noyau est sollicité par un ressort de manière à rester en contact avec la tige, au début de la déflexion du bilame.In addition, patent EP-A-18 553 discloses a switch in which, in order to compensate for a parasitic play between the core of the magnetic trip device and a hook control rod, on which the bimetallic strip acts, the core is stressed by a spring so as to remain in contact with the rod, at the start of the bimetal deflection.

La présente invention a notamment pour but de conférer à un interrupteur de protection du type rappelé ci-dessus une grande simplicité de conception et d'assemblage, tout en conservant un faible encombrement à l'ensemble serrure- organe de commande manuelle.The object of the present invention is in particular to give a protection switch of the type mentioned above great simplicity of design and assembly, while retaining a small footprint for the lock-manual control member assembly.

Elle a pour autre but de réaliser un interrupteur de protection à grande sensibilité de déclenchement.Another purpose is to provide a protection switch with high trigger sensitivity.

A cet effet, l'invention concerne un interrupteur de protection du type comprenant dans un boîtier isolant:

  • - au moins un contact fixe et un contact mobile coopérants et formant un chemin de courant interruptible en réponse:
  • . soit à l'actionnement d'un organe magnétique et/ou thermique de déclenchement automatique,
  • . soit à l'actionnement d'un organe de commande manuelle de déclenchement et de réarmement,
  • - une serrure comprenant:
  • . un crochet déplaçable par l'organe de déclenchement automatique,
  • . un levier de déclenchement muni à une première extrémité d'un becquet coopérant avec le crochet et relié à l'organe de commande manuelle, de manière à pivoter, soit en prenant appui sur le crochet pour effectuer une ouverture volontaire des contacts, soit sur un axe déplaçable relié à l'organe de commande manuelle pour effectuer un déclenchement automatique; ce levier de déclenchement étant relié à une pièce de contact montée pivotante sur un tourillon appartenant à une pièce conductrice rigide fixe par rapport au boîtier et solidaire d'une borne de l'interrupteur, au moyen d'un ressort constituant, d'une part, une biellette élastique de transmission entre le levier et la pièce de contact et contribuant, d'autre part, à l'ouverture brusque de la pièce de contact.

Selon l'invention, cet interrupteur est plus particulièrement caractérisé en ce que la biellette élastique consiste en un ressort en épingle en forme de V, dont une première branche est appliquée sur une deuxième extrémité du levier de déclenchement, et dont l'autre branche coopère avec deux appuis situés de part et d'autre du tourillon, à savoir un. appui d'ouverture et un appui de fermeture.To this end, the invention relates to a protection switch of the type comprising in an insulating housing:
  • - at least one fixed contact and one mobile contact cooperating and forming an interruptible current path in response:
  • . either on the actuation of a magnetic and / or thermal organ for automatic triggering,
  • . either the actuation of a manual triggering and resetting control member,
  • - a lock comprising:
  • . a hook movable by the automatic triggering member,
  • . a trigger lever provided at one end with a spoiler cooperating with the hook and connected to the manual control member, so as to pivot, either by bearing on the hook to effect voluntary opening of the contacts, or on a movable axis connected to the manual control member to carry out an automatic triggering; this trigger lever being connected to a contact piece pivotally mounted on a pin belonging to a rigid conductive piece fixed relative to the housing and secured to a terminal of the switch, by means of a constituent spring, on the one hand , an elastic transmission link between the lever and the contact piece and contributing, on the other hand, to the abrupt opening of the contact piece.

According to the invention, this switch is more particularly characterized in that the elastic link consists of a V-shaped pin spring, a first branch of which is applied to a second end of the trigger lever, and the other branch of which cooperates with two supports located on either side of the trunnion, namely one. opening support and closing support.

Un ressort supplémentaire peut être prévu pour contribuer à l'ouverture de la pièce de contact, mais cette ouverture est, de préférence, produite par la seule biellette élastique précitée.An additional spring may be provided to contribute to the opening of the contact piece, but this opening is preferably produced by the aforementioned single elastic link.

Il résulte de la description qui précède que la pièce de contact est avantageusement montée pivotante sur un tourillon fixe par rapport au boîtier, la biellette élastique coopérant avec au moins un appui prévu sur la pièce de contact pour maintenir celle-ci appliquée sur le tourillon fixe. Dès lors que l'appui fixe fait partie d'une pièce rigide et électriquement conductrice solidaire de l'une des bornes de l'interrupteur, le ressort permet d'assurer une liaison électrique satisfaisante entre la borne et la pièce de contact sans nécessiter de tresse ou autre moyen conducteur flexible.It follows from the foregoing description that the contact piece is advantageously pivotally mounted on a pin which is fixed relative to the housing, the elastic link cooperating with at least one support provided on the contact piece to keep the latter applied to the fixed pin. . As soon as the fixed support is part of a rigid and electrically conductive part integral with one of the terminals of the switch, the spring makes it possible to ensure a satisfactory electrical connection between the terminal and the contact part without requiring braid or other flexible conductive medium.

Le crochet peut constituer avantageusement un palonnier interposé entre le noyau du déclencheur magnétique et le bilame du déclencheur thermique et agencé de manière qu'un début de déflexion du bilame entraîne un léger pivotement du crochet et une légère plongée du noyau. De plus, un ressort de rappel associé au noyau du déclencheur magnétique constitue, de préférence, un moyen de rappel du crochet vers sa position d'accrochage du becquet.The hook can advantageously constitute a lifter interposed between the core of the magnetic trip device and the bimetallic strip of the thermal trip device and arranged so that the beginning of deflection of the bimetallic strip causes a slight pivoting of the hook and a slight plunging of the core. In addition, a return spring associated with the core of the magnetic trigger preferably constitutes a means for returning the hook to its position for hooking the spoiler.

D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description qui suit en regard des dessins annexés et qui vise un exemple de réalisation non limitatif.

  • La figure 1 représente schématiquement en élévation avec arrachement partiel du boîtier l'interrupteur de protection en position de fermeture des contacts;
  • La figure 2 montre de même l'interrupteur en position de fin de déclenchement automatique sur défaut ou respectivement en position d'ouverture manuelle;
  • Les figures 3 et 4 représentent le levier de déclenchement et la pièce de contact de l'interrupteur des figures 1 et 2;
  • La figure 5 montre en perspective un détail de montage de la pièce de contact et de la biellette élastique.
  • Les figures 6 à 8 représentent l'extrémité d'accrochage du levier de déclenchement respectivement dans les positions d'accrochage (position armée), de début de déclenchement automatique magnétique et de fin de déclenchement automatique.

L'interrupteur de protection 10 représenté sur les figures est un disjoncteur présentant un boîtier 11 électriquement isolant, susceptible d'être fixé au moyen d'organes appropriés d'encliquetage sur un support tel qu'une platine perforée ou un rail normalisé et muni de bornes B1, B2 respectivement reliées à un contact mobile C1 et à un contact fixe C2. On pourrait bien entendu prévoir des ponts de contact C1 et C2.Other advantages and characteristics of the invention will appear on reading the description which follows with reference to the appended drawings and which relates to a nonlimiting exemplary embodiment.
  • Figure 1 shows schematically in elevation with partial cutaway of the housing the protective switch in the closed position of the contacts;
  • FIG. 2 likewise shows the switch in the end position of automatic tripping on fault or respectively in the manual opening position;
  • Figures 3 and 4 show the release lever and the contact part of the switch of Figures 1 and 2;
  • Figure 5 shows in perspective a mounting detail of the contact piece and the elastic link.
  • Figures 6 to 8 show the hooking end of the trigger lever respectively in the hooking positions (armed position), the start of automatic magnetic triggering and the end of automatic triggering.

The protective switch 10 shown in the figures is a circuit breaker having an electrically insulating casing 11, capable of being fixed by means of suitable latching members on a support such as a perforated plate or a standardized rail and provided with terminals B1, B2 respectively connected to a movable contact C1 and to a fixed contact C2. One could of course provide contact bridges C1 and C2.

L'interrupteur 10 comporte un organe de commande manuelle M constitué par un bouton rotatif d'axe 01 et un organe de déclenchement automatique D muni d'un déclencheur magnétique DM et d'un déclencheur thermique DT; les organes M et D sont montés dans le boîtier et sont susceptibles de séparer le contact C1 du contact C2 et donc d'ouvrir le chemin de courant B1, B2 au moyen d'une serrure en réponse à la détection d'un défaut électrique via les déclencheurs DM ou DT ou respectivement en réponse à une commande manuelle. Une chambre de coupure A est limitrophe des contacts C1, C2.The switch 10 comprises a manual control member M constituted by a rotary button of axis 01 and an automatic trigger member D provided with a magnetic trigger DM and a thermal trigger DT; the members M and D are mounted in the housing and are capable of separating the contact C1 from the contact C2 and therefore of opening the current path B1, B2 by means of a lock in response to the detection of an electrical fault via DM or DT triggers or respectively in response to a manual command. An interrupting chamber A is bordering on the contacts C1, C2.

L'élément de sortie de l'organe de déclenchement D est un crochet 12 monté rotatif autour d'un axe fixe 02 par rapport au boîtier et coopérant par une fourche 13 qui présente deux doigts 13a et 13b avec une crosse 14 à surfaces respectives d'appui 14a et 14b. La crosse 14 est située à l'extrémité d'un noyau plongeur 15 du déclencheur magnétique DM. Le crochet 12 coopère de plus au moyen d'un doigt 16 avec un levier déformable à bilame 17 du déclencheur thermique DT.The output element of the triggering member D is a hook 12 rotatably mounted about a fixed axis 02 relative to the housing and cooperating by a fork 13 which has two fingers 13a and 13b with a stock 14 with respective surfaces d 'support 14a and 14b. The butt 14 is located at the end of a plunger core 15 of the magnetic trip device DM. The hook 12 further cooperates by means of a finger 16 with a deformable bimetal lever 17 of the thermal trip device DT.

La serrure comprend un levier de déclenchement 18 en forme de balancier réalisé en matériau isolant. Le levier 18 est directement monté sur un tenon 19 de l'organe manuel M et présente, à cet effet, une coulisse 20 peu inclinée (figure 1), voire parallèle (figure 2), vis-à-vis de la face avant 21 du disjoncteur, et coopérant avec ledit tenon. Le tenon 19 est déplaçable d'une position X1 à une position X2 et vice-versa, tandis que la coulisse 20 est incurvée en 20a à son extrémité droite (figure 3). Le levier 18 comporte, à une première extrémité, un becquet 22 reposant sur un appui 23 du crochet (figure 6), cet appui étant effaçable par suite du pivotement du crochet pour autoriser le basculement du levier 18 en réponse à un défaut électrique détecté par le déclencheur DM ou DT.The lock comprises a trigger lever 18 in the form of a pendulum made of insulating material. The lever 18 is directly mounted on a tenon 19 of the manual member M and has, for this purpose, a slide 20 slightly inclined (FIG. 1), or even parallel (FIG. 2), with respect to the front face 21 of the circuit breaker, and cooperating with said stud. The tenon 19 is movable from a position X1 to a position X2 and vice versa, while the slide 20 is curved at 20a at its right end (Figure 3). The lever 18 comprises, at a first end, a spoiler 22 resting on a support 23 of the hook (FIG. 6), this support being erasable as a result of the pivoting of the hook to allow tilting of the lever 18 in response to an electrical fault detected by the DM or DT trigger.

Le levier 18 comprend, vers sa deuxième extrémité épanouie ou tête 24, une rainure de guidage 25 sensiblement perpendiculaire à la face 21 et coopérant avec un pion de guidage 26 ménagé dans le boitier. Près de l'extrémité supérieure de la tête 24 du levier 18, il est prévu un point d'appui ou d'ancrage 27 pour un ressort R en épingle à forme de V.The lever 18 comprises, towards its second open end or head 24, a guide groove 25 substantially perpendicular to the face 21 and cooperating with a guide pin 26 formed in the housing. Near the upper end of the head 24 of the lever 18, a fulcrum or anchor point 27 is provided for a pin-shaped spring R in the shape of a V.

La première branche 28 du ressort R est ainsi appliquée sur le point d'ancrage déplaçable 27 pour tendre à faire basculer en sens horaire le levier 18; la deuxième branche 29 du ressort R est fixée à rotation sur un tourillon 30a ménagé sur une pièce conductrice rigide 30 qui est fixe par rapport au boîtier et qui est solidarisée avec la borne 81. La branche 29 est en premier lieu appliquée à son extrémité sur un appui de fermeture 31 d'une pièce de contact 32 séparée du levier 18 et constituant ou portant le contact C1, en second lieu applicable près de la pointe du V sur un appui d'ouverture 36 de la pièce 32, les appuis 31 et 36 étant situés de part et d'autre du tourillon fixe 30a. L'application de la branche 29 sur l'appui de fermeture 31 permet d'assurer la fermeture du contact C1 et sa pression sur le contact C2; l'application de la branche 29 sur l'appui d'ouverture 36 permettant l'ouverture du contact C1. Le sens de rotation de la pièce de contact C1 dépend de l'application de l'effort dff- férentiel de la branche 29 sur l'un ou l'autre appui 31, 36, ceci étant fonction de la position du point d'ancrage 27 de la branche 28.The first branch 28 of the spring R is thus applied to the movable anchor point 27 in order to tend to tilt the lever 18 clockwise; the second branch 29 of the spring R is rotatably attached to a pin 30a formed on a rigid conductive part 30 which is fixed relative to the housing and which is secured to the terminal 81. The branch 29 is first applied to its end on a closing support 31 of a contact piece 32 separated from the lever 18 and constituting or carrying the contact C1, secondly applicable near the tip of the V on an opening support 36 of the piece 32, the supports 31 and 36 being located on either side of the fixed pin 30a. The application of the branch 29 on the closing support 31 ensures the closing of the contact C1 and its pressure on the contact C2; the application of the branch 29 on the opening support 36 allowing the opening of the contact C1. The direction of rotation of the contact piece C1 depends on the application of the differential force of the branch 29 on one or the other support 31, 36, this being a function of the position of the anchoring point 27 of branch 28.

Le bouton de commande manuelle M présente une prise manuelle 33, le tenon 19 est situé sensiblement à l'opposé de la prise 33 par rapport à l'axe 01 et à une distance de cet axe permettant une amplification d'effort. Un ressort de rappel 34 est associé au bouton M pour assister celui-ci lors d'une commande manuelle d'ouverture et pour le rappeler vers la position arrêt lors d'un déclenchement sur défaut.The manual control button M has a manual grip 33, the pin 19 is located substantially opposite the grip 33 relative to the axis 01 and at a distance from this axis allowing amplification of effort. A return spring 34 is associated with the button M to assist the latter during a manual opening command and to call it back to the stop position during a trip on fault.

Il convient de noter que le déclencheur magnétique DM comprend un ressort 35 sollicitant le noyau 15 pour que la crosse 14 de celui-ci repousse le doigt 13a du crochet 12 afin de rappeler celui-ci dans la position armée des figures 1 et 6.It should be noted that the magnetic trigger DM includes a spring 35 urging the core 15 so that the butt 14 of the latter pushes the finger 13a of the hook 12 in order to rap peel it in the armed position of figures 1 and 6.

Le crochet 12 constitue avantageusement un palonnier interposé entre le noyau magnétique 15 et le bilame 17, de manière qu'un début de déflexion du bilame entraîne un très léger pivotement antihoraire du crochet et donc une légère plongée du noyau. De la sorte, le seuil d'intensité de déclenchement du déclencheur DM est abaissé; une surcharge détectée par le bilame du déclencheur thermique entraîne donc une plus grande sensibilité du déclencheur magnétique.The hook 12 advantageously constitutes a spreader interposed between the magnetic core 15 and the bimetallic strip 17, so that the beginning of deflection of the bimetallic strip causes a very slight counterclockwise pivoting of the hook and therefore a slight plunge of the core. In this way, the trigger intensity threshold of the DM trigger is lowered; an overload detected by the bimetallic strip of the thermal release therefore causes greater sensitivity of the magnetic release.

Le doigt 16 du crochet comporte un prolongement 37 situé derrière le bilame et muni de repères 16a qui facilitent le réglage du bilame.The finger 16 of the hook has an extension 37 located behind the bimetallic strip and provided with marks 16a which facilitate the adjustment of the bimetallic strip.

Le fonctionnement du dispositif décrit est le suivant:
Dans la position d'enclenchement (figure 1), le contact mobile C1 est appliqué contre le contact fixe C2 par suite de l'effort appliqué en sens antihoraire par le ressort R sur l'appui 31 de la pièce de contact 32. Le circuit B1, C1, C2, B2 est donc fermé.The operation of the device described is as follows:
In the latching position (Figure 1), the movable contact C1 is applied against the fixed contact C2 as a result of the force applied counterclockwise by the spring R on the support 31 of the contact piece 32. The circuit B1, C1, C2, B2 is therefore closed.

Dans cette position, le bouton de commande manuelle M en butée sur le boîtier occupe une position telle que son tenon 19 est dans la position notée X1 à l'extrémité droite 20a de la coulisse 20. Le becquet 22 du levier 18 est accroché sur l'appui 23 du crochet 12, lequel est maintenu dans la position indiquée figure 1 par le ressort 35 du déclencheur magnétique DM.In this position, the manual control button M in abutment on the housing occupies a position such that its lug 19 is in the position denoted X1 at the right end 20a of the slide 20. The spoiler 22 of the lever 18 is hooked on the support 23 of the hook 12, which is held in the position indicated in FIG. 1 by the spring 35 of the magnetic trip device DM.

Le ressort R sollicite le levier 18 pour le faire basculer en sens horaire autour du tenon d'articulation 19, mais en est empêché par l'accrochage précité. L'extrémité supérieure de la rainure 25 du levier 18 est contre le pion de guidage 26.The spring R biases the lever 18 to make it tilt clockwise around the hinge pin 19, but is prevented by the above attachment. The upper end of the groove 25 of the lever 18 is against the guide pin 26.

A la suite d'un déclenchement sur défaut détecté par le déclencheur magnétique DM ou thermique DT, le crochet 12 pivote en sens antihoraire et sa surface d'appui 23 se dégage du becquet 22 en libérant le levier 18 (figure 7). Celui-ci pivote en sens horaire autour du tenon 19 occupant alors la position X1 sous l'effet de la sollicitation ascendante exercée par le ressort R sur son point d'ancrage 27. La branche 28 du ressort monte; la branche 29 qui en est solidaire est en- trainée et vient s'appliquer sur l'appui d'entraînement 36 prévu sur la pièce de contact 32 et fait tourner celle-ci brusquement en sens horaire pour ouvrir le contact CI.Following a trip on fault detected by the magnetic or thermal trip device DT, the hook 12 pivots counterclockwise and its bearing surface 23 emerges from the spoiler 22 by releasing the lever 18 (FIG. 7). The latter pivots clockwise around the tenon 19 then occupying position X1 under the effect of the upward stress exerted by the spring R on its anchor point 27. The branch 28 of the spring rises; the branch 29 which is integral therewith is entrained and comes to bear on the drive support 36 provided on the contact piece 32 and rotates the latter abruptly clockwise to open the contact CI.

En fin de déclenchement (figure 2), l'extrémité inférieure de la rainure 25 est en butée contre le pion 26; en raison de la coupure du circuit, le noyau 15 du déclencheur magnétique revient en position haute et rappelle le crochet 12 en position armée (figure 8). Il convient également d'observer que, lors du processus de déclenchement, le déplacement du levier 18 permet au bouton M de passer de la position marche à la position arrêt sous l'effet de son ressort 34 et cela, grâce au dépassement de l'obstacle constitué par la transition 20b de la coulisse 20 par le tenon 19. De plus, en fin de déclenchement, le levier 18 est amené dans la position illustrée sur les figures 2 et 8 où l'on constate l'existence d'un petit jeu entre le becquet 22 du levier 18 et l'appui 23 du crochet 12.At the end of tripping (FIG. 2), the lower end of the groove 25 is in abutment against the pin 26; due to the circuit being cut off, the core 15 of the magnetic trip unit returns to the high position and recalls the hook 12 in the armed position (Figure 8). It should also be observed that, during the triggering process, the movement of the lever 18 allows the button M to pass from the on position to the off position under the effect of its spring 34 and this, thanks to the overshoot of the obstacle constituted by the transition 20b of the slide 20 by the tenon 19. In addition, at the end of triggering, the lever 18 is brought into the position illustrated in FIGS. 2 and 8 where we note the existence of a small clearance between the spoiler 22 of the lever 18 and the support 23 of the hook 12.

Pour effectuer une ouverture volontaire des contacts, l'utilisateur commande manuellement le bouton M pour l'amener par pivotement horaire autour de 01 de sa position de la figure 1 à la position de la figure 2, c'est-à-dire pour porter le tenon 19 de la position X1 à la position X2.To carry out a voluntary opening of the contacts, the user manually controls the button M to bring it by clockwise pivoting around 01 from its position in FIG. 1 to the position in FIG. 2, that is to say for carrying the post 19 from position X1 to position X2.

Le crochet 12 reste immobile et le becquet situé à l'extrémité droite du levier 18 reste accroché sur l'appui 22, celui-ci servant donc de point de basculement pour le levier.The hook 12 remains stationary and the spoiler located at the right end of the lever 18 remains hooked on the support 22, the latter therefore serving as a tipping point for the lever.

La coulisse étant légèrement incurvée, le début de la rotation du bouton M détermine un basculement antihoraire du levier 18 qui renforce l'écrasement du V du ressort R et augmente donc l'énergie élastique de celui-ci; puis après le dépassement de la transition 20b de la coulisse 20 par le tenon 19, la rotation du bouton M entraîne un basculement horaire brusque du levier 18, de sorte que le point d'ancrage 27 du ressort R monte; la branche 28 de celui-ci monte et entraîne la branche 29 qui provoque une diminution de la pression de contact de C1 sur C2, puis en s'appliquant sur l'appui 36 entraîne la pièce 32 et provoque une séparation brusque de C1 vis-à-vis de C2 jusqu'à la position d'ouverture illustrée figure 2.The slide being slightly curved, the beginning of the rotation of the button M determines a counterclockwise tilting of the lever 18 which reinforces the crushing of the V of the spring R and therefore increases the elastic energy of the latter; then after the transition 20b of the slide 20 has been exceeded by the tenon 19, the rotation of the button M causes a sudden clockwise tilting of the lever 18, so that the anchor point 27 of the spring R rises; the branch 28 thereof rises and drives the branch 29 which causes a decrease in the contact pressure of C1 on C2, then by applying to the support 36 drives the part 32 and causes an abrupt separation of C1 vis- opposite C2 to the open position illustrated in Figure 2.

En fin d'ouverture volontaire, l'extrémité inférieure de la rainure 25 bute contre le pion 26. Une autre butée pourrait, bien sûr, être prévue dans le boîtier pour limiter le mouvement du levier 18.At the end of voluntary opening, the lower end of the groove 25 abuts against the pin 26. Another stop could, of course, be provided in the housing to limit the movement of the lever 18.

Le réarmement du crochet s'effectue automatiquement sous l'effet du retour du noyau magnétique à sa position haute. Il suffit pour réen- clencher l'interrupteur de faire tourner le bouton de commande manuelle en sens antihoraire autour de l'axe 01 de la position "arrêt" (figure 2) a la position "marche" (figure 1); on abaisse ainsi le levier 18 et la branche 28 ressort, de sorte que la branche 29 sollicite l'appui de fermeture 31 de la pièce de contact 32 jusqu'à l'application de C1 sur C2; le décollement de la branche 29 à partir de l'appui d'entraînement 36 autorise la sur- course de pression du contact. Le becquet 22 vient s'accrocher sur son appui 23. En fin de réarmement, le tenon 19 se loge dans l'extrémité incurvée 20a de la coulisse 20, de sorte que le bouton M est contraint de rester dans la position marche.The hook is reset automatically under the effect of the return of the magnetic core to its upper position. It is sufficient to reset the switch by turning the manual control button counterclockwise around the axis 01 from the "off" position (figure 2) to the "on" position (figure 1); the lever 18 and the branch 28 are thus lowered spring, so that the branch 29 requests the closing support 31 of the contact piece 32 until C1 is applied to C2; the detachment of the branch 29 from the drive support 36 authorizes the contact pressure overtravel. The spoiler 22 comes to hang on its support 23. At the end of rearming, the tenon 19 is housed in the curved end 20a of the slide 20, so that the button M is forced to remain in the on position.

Un élément de visualisation de déclenchement peut être prévu sur la tête 24 du levier 18 pour que son déplacement en regard d'une fenêtre ménagée dans le renfoncement de la face avant 21 du boîtier signale le déclenchement.A trigger display element can be provided on the head 24 of the lever 18 so that its displacement opposite a window formed in the recess of the front face 21 of the housing signals the trigger.

Des repères 16a sont avantageusement prévus sur le doigt 16 du bilame 17 afin d'aider une opératrice au cours du processus de réglage du bilame.Marks 16a are advantageously provided on the finger 16 of the bimetallic strip 17 in order to assist an operator during the process of adjusting the bimetallic strip.

Il va de soi que l'on peut apporter au mode de réalisation décrit des modifications sans sortir du cadre de l'invention. L'organe de commande manuelle M, représenté sous forme de bouton pivotant, pourrait être réalisé sous forme de poussoir. L'actionnement de l'organe M peut être effectue à partir d'un appareil polaire ou additif voisin de l'interrupteur de protection considéré. La biellette élastique décrite constitue l'unique moyen d'interaction mécanique entre le levier pivotant de déclenchement et la pièce de contact.It goes without saying that modifications can be made to the embodiment described without departing from the scope of the invention. The manual control member M, shown in the form of a pivoting button, could be produced in the form of a pusher. The actuation of the organ M can be carried out at from a polar device or additive close to the protection switch considered. The described elastic link constitutes the only means of mechanical interaction between the pivoting trigger lever and the contact part.

Claims (7)

1. Protection switch for an electric installation comprising, in an insulating case (11):
- at least one fixed contact (C2) and a mobile contact (C1) which cooperate and form a current path which can be interrupted in response:
. either to the actuation of a magnetic (DM) and/or thermal (DT) automatic tripping member,
. or to the actuation of a manual tripping and resetting control member (M),
- a lock comprising:
. a hook (12) which can be moved by the automatic tripping member (DM, DT),
. a tripping lever (18) having at a first end a nose-piece (22) cooperating with the hook (12) and connected to the manual control member (M) so as to pivot, either by bearing on the hook (12) so as to cause voluntary opening of the contacts or on a mowable shaft (19) connected to the manual control member (M) for causing automatic tripping; this tripping lever (18) being connected to a contact piece (32) mounted for pivoting on a pin (30a) belonging to a rigid conducting piece (30) fixed with respect to the case (11) and fast with a terminal (B1) of the switch, by means of a spring (R) forming a resilient transmission link between the lever (18) and the contact piece (32) and contributing to sudden opening of the contact piece (32)
characterized in that the resilient link (R) consists of a hairpin spring in the shape of a V, a first leg (28) of which is applied to a second end of the tripping lever (18) and the other leg (29) of which cooperates with two rests situated on each side of the pin (30a), namely an opening rest (36) and a closure rest (31
2. Protection switch according to claim 1, characterized in that said resilient link (R) is disposed so as to hold the contact piece (32) in abutment on the pin (30a).
3. Protection switch according to one of claims 1 and 2, characterized in that said link (R) is disposed so as to form the means pressing the mobile contact (C1) on the fixed contact (C2).
4. Protection switch according to claim 1, characterized by the fact that the resilient link (R) forms the only means for opening the contact piece (32).
5. Protection switch according to claim 1, characterized by the fact that the hook (12) is interposed between a core (15) of the magnetic tripper (DM) and a bimetallic strip (17) of the thermal tripper (DT) and is adapted so that beginning of deflection of the bimetallic strip (17) causes slight plunging of the core (15) via pivoting of the hook (12).
6. Protection switch according to claim 5, characterized by the fact that the magnetic tripper (DM) comprises a spring (35) for returning the magnetic core (15), this spring forming a return means for the hook (12).
7. Protection switch according to one of claims 5 and 6, characterized by the fact that the hook has a finger (16) intended to cooperate with the bimetallic strip (17), the finger (16) having marks (16a) for assisting adjustment of the bimetallic strip.
EP86401923A 1985-09-20 1986-09-02 Protective circuit breaker with a resilient link Expired - Lifetime EP0218497B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401923T ATE50663T1 (en) 1985-09-20 1986-09-02 CIRCUIT BREAKER WITH SPRING TABS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8513942A FR2587829B1 (en) 1985-09-20 1985-09-20 PROTECTION SWITCH WITH ELASTIC ROD
FR8513942 1985-09-20

Publications (2)

Publication Number Publication Date
EP0218497A1 EP0218497A1 (en) 1987-04-15
EP0218497B1 true EP0218497B1 (en) 1990-02-28

Family

ID=9323085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401923A Expired - Lifetime EP0218497B1 (en) 1985-09-20 1986-09-02 Protective circuit breaker with a resilient link

Country Status (4)

Country Link
EP (1) EP0218497B1 (en)
AT (1) ATE50663T1 (en)
DE (1) DE3669226D1 (en)
FR (1) FR2587829B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648615B1 (en) * 1989-06-16 1991-09-13 Hager Electro IMPROVEMENTS ON AUTOMATIC SWITCHES, IN PARTICULAR FOR CIRCUIT BREAKERS AND CIRCUIT BREAKERS
CN104752113B (en) * 2015-03-11 2017-05-17 浙江天正电气股份有限公司 Electric switch for voltage electrical appliance

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2132780A1 (en) * 1971-07-01 1973-01-11 Siemens Ag CIRCUIT BREAKERS, IN PARTICULAR CIRCUIT BREAKERS
DE2646916A1 (en) * 1976-10-18 1978-04-20 Bbc Brown Boveri & Cie ELECTRICAL CIRCUIT BREAKER FOR OVERCURRENT AND SHORT CIRCUIT RELEASE
FR2455355A1 (en) * 1979-04-25 1980-11-21 Saparel IMPROVEMENTS ON MODULAR CIRCUIT BREAKERS
FR2468991A1 (en) * 1979-10-26 1981-05-08 Legrand Sa CIRCUIT BREAKER AND ITS HANGING MECHANISM
DE3034790A1 (en) * 1980-09-15 1982-03-25 Siemens AG, 1000 Berlin und 8000 München CIRCUIT BREAKER

Also Published As

Publication number Publication date
EP0218497A1 (en) 1987-04-15
ATE50663T1 (en) 1990-03-15
FR2587829A1 (en) 1987-03-27
DE3669226D1 (en) 1990-04-05
FR2587829B1 (en) 1993-05-07

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