EP1127363B1 - Thermal overload relay provided with a spring leaf mechanism - Google Patents

Thermal overload relay provided with a spring leaf mechanism Download PDF

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Publication number
EP1127363B1
EP1127363B1 EP99954049A EP99954049A EP1127363B1 EP 1127363 B1 EP1127363 B1 EP 1127363B1 EP 99954049 A EP99954049 A EP 99954049A EP 99954049 A EP99954049 A EP 99954049A EP 1127363 B1 EP1127363 B1 EP 1127363B1
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EP
European Patent Office
Prior art keywords
blade
fact
protection relay
foot
extension
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
EP99954049A
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German (de)
French (fr)
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EP1127363A1 (en
Inventor
Bernard Schneider Shanghai I. Control Ltd. BIZARD
Daniel Sinthomez
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • 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
    • H01H83/223—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 bimetal elements

Definitions

  • the present invention relates to an electromechanical thermal protection relay comprising in a housing elements, such as bimetallic strips, thermally deformable in the event of overcurrent in power lines, as well as switch contacts associated with the power lines and susceptible to be actuated by a control member which can be urged by the deformable elements.
  • the control member acts at a midpoint of a blade thin and flexible which has a fixed foot or resting on the housing and a cooperating head with a contact operating element.
  • the force undergone by the blade in its midpoint results in a sudden displacement of the head from a position stable rest at a stable working position, while the blade foot remains substantially in its original position.
  • the blade is designed, produced and assembled from so as to be able to blister from one stable position to the other, i.e. to be able to flex brutally and it presents for this purpose, in its middle part and to constitute a range of application for the control member, a finger projecting in an open area.
  • the object of the invention is to remedy the aforementioned drawbacks and to make reliable and reproducible the manufacturing characteristics, in particular the adjustment conditions, a thermal relay of the type described, while giving it a small footprint.
  • the base of the flexible blade has a folded extension for apply elastically against a range of the housing so as to cause a pressurization of the blade towards the support.
  • the extension may in particular extend from the foot of the blade in the direction of its length and be folded, beyond the fixing area of the rigid support on the blade, V-shaped or U-shaped relative to the general plane of the blade, the free branch of V or U being applied against the scope of the housing.
  • the extension may include two symmetrical branches.
  • the pivoting fulcrum of the blade support is located along the length of the blade substantially at the level of the range of application of the control on the blade.
  • the adjusting member may have a cam applied to the rigid support of the blade on its side of the pivoting fulcrum, this cam being capable of turning about an axis parallel to the general plane of the blade.
  • Figure 1 shows in section a thermal protection relay according to the invention.
  • Figure 2 is a perspective view of the blistering elastic blade of the relay
  • Figures 3 and 4 show the blade respectively in front elevation and side.
  • the illustrated electromechanical thermal protection relay includes a box insulator 10 which offers a front face 10a provided with operating and adjusting members 10b and which contains bimetallic strips not indicated, deformable in the event of overcurrent in power lines also not shown.
  • the housing 10 houses pairs of normally closed switch contacts 11 (NC) and normally open switch contacts 12 (NO), including the contacts mobile are located at the ends of respective elastic blades 13,14 controllable by a trigger mechanism 15 in response to the deformation of at least a bimetallic strip.
  • the trigger mechanism 15 includes a control member 16 acting on a flexible blistering blade 20 which will act on the contacts.
  • the organ of control 16 is for example a lever pivoting around an axis X1 and one of which part is formed by an ambient temperature compensation bimetallic strip.
  • the flexible blade 20 extends in the direction of its length over a distance h and it is symmetrical with respect to a plane Q which defines a principal director X2 at rest and X'2 in work.
  • the general surface of the blade is slightly curved and will later be qualified as a general plan P.
  • the blade has a support foot 21 via a support 30 on a bearing surface 17 of the housing, as well as a head 22 and a middle part 23.
  • the head 22 of the blade cooperates with a slide 18 for operating the contacts 11.12 to move it in a direction Y1 parallel to the front face 10a of the housing.
  • the middle part 23 of the blade located between the foot 21 and the head 22, is provided of a finger 24, projecting into an openwork region 25.
  • the finger 24 constitutes a range 24a for the control lever 16, which acts in the event of an overcurrent an effort in a direction Y2 parallel to the front face 10a of the housing and contrary to Y1.
  • the rigid support 30, in the form of a wafer or the like.
  • the plate is arranged on the side of the blade opposite the lever 16 and has at its lower part a fixing zone 31, associated with a fixing range 26 of the foot 21 of the blade, and its part upper a support point 32 for pivoting on the fixed surface 17 of the housing.
  • the blade 20 or preferably the plate 30 is biased by an adjusting member 34 able to move it according to Y1 or Y2.
  • the regulating member 34 rotates about an axis X3 and offers a cam surface 35 applied to the end 33 of the insert 30 to rotate the plate 30 and with it the flexible blade 20 around the axis of pivot X4 defined by the bearing 17 and the fulcrum 32, in order to adjust the position of the head 22 of the blade which cooperates with the slide.
  • the regulating member 34 is easily accessible by opening the housing before fitting a cover (not shown).
  • the axes X1, X3, X4 are mutually parallel and are perpendicular to Y1, Y2 as well as on the plane of symmetry Q of the plate.
  • the foot 21 of the blade 20 is provided with an extension 27 constituted either of a branch, or preferably of two elastic branches 28,29. Extension 27 is directed from the foot along the length of the blade. Branches 28,29 are symmetrical with respect to the Q plane. The branches 28,29 are folded down V-shaped or U-shaped by folding, with a folding angle greater than 135 ° and here close 180 °, and their free end is supported on a bearing 36 of the housing. We notes that this configuration of the blade reduces the overall length the blade while producing the desired pressure of the pivot 32 on the bearing surface 17.
  • the pivot axis X4 is located, in the height direction of the blade, substantially at the level of the bearing surface 24a of the finger 24 of the blade, so that the adjustment of the position of the head 22 has a very low impact on the rest position of the lever 16 and therefore on the initial state of the control mechanism.
  • the distance e between axis X4 and range 24a can for example be less than 10%; preferably 7%, of the length h of the blade.
  • the blade 20 is introduced into the housing between the pivoting support 17 and the bearing surface 36 which pressurizes the support 17; foot 21 is applied against the adjustment cam 35, while the head is engaged in the slide 18.
  • the lever 16 is applied to the track 24a.
  • the operator rotates the member 34 until the desired position is obtained, without disturbing the mechanism 15 thanks to the provisions of the invention.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Springs (AREA)
  • Fuses (AREA)
  • Vehicle Body Suspensions (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Blinds (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention concerns an electromechanical protective relay comprising deformable bimetal switches in the event of overload in power lines. A triggering mechanism acts on a flexible blistering segment (20) which can pivot by means of a support (30) on a fixed rest (17) and whereof the stem (21) has an extension (27) formed along the length of the segment and folded back in U- or V-shape to press elastically against a bearing surface (36) of the box so as to cause the segment to exert pressure on the pivot.

Description

La présente invention concerne un relais de protection thermique électromécanique comprenant dans un boítier des éléments, tels que des bilames, thermiquement déformables en cas de surintensité dans des lignes de courant de puissance, ainsi que des contacts interrupteurs associés aux lignes de puissance et susceptibles d'être actionnés par un organe de commande sollicitable par les éléments déformables.The present invention relates to an electromechanical thermal protection relay comprising in a housing elements, such as bimetallic strips, thermally deformable in the event of overcurrent in power lines, as well as switch contacts associated with the power lines and susceptible to be actuated by a control member which can be urged by the deformable elements.

De manière usuelle, l'organe de commande agit en un point médian d'une lame mince et souple qui présente un pied fixé ou en appui sur le boítier et une tête coopérant avec un élément de manoeuvre des contacts. En réponse au déplacement de l'organe de commande à la suite d'une surintensité, l'effort subi par la lame en son point médian se traduit par un déplacement brusque de la tête d'une position stable de repos à une position stable de travail, tandis que le pied de la lame reste sensiblement dans sa position initiale. La lame est dessinée, réalisée et montée de manière à pouvoir cloquer d'une position stable à l'autre, c'est-à-dire à pouvoir fléchir brutalement et elle présente à cet effet, dans sa partie médiane et pour constituer une plage d'application pour l'organe de commande, un doigt en saillie dans une zone ajourée.Usually, the control member acts at a midpoint of a blade thin and flexible which has a fixed foot or resting on the housing and a cooperating head with a contact operating element. In response to displacement of the control member following an overcurrent, the force undergone by the blade in its midpoint results in a sudden displacement of the head from a position stable rest at a stable working position, while the blade foot remains substantially in its original position. The blade is designed, produced and assembled from so as to be able to blister from one stable position to the other, i.e. to be able to flex brutally and it presents for this purpose, in its middle part and to constitute a range of application for the control member, a finger projecting in an open area.

Un relais de ce type est décrit dans le document FR-1 274 608. La précontrainte nécessaire au cloquage de la lame est alors produite par la fixation rigide, avec resserrement, de deux branches prévues au pied de la lame. Cette réalisation est difficilement reproductible et ne permet pas de régler les positions de la tête.A relay of this type is described in document FR-1 274 608. The prestressing necessary for blistering the blade is then produced by the rigid attachment, with tightening, of two branches provided at the foot of the blade. This achievement is difficult to reproduce and does not allow the head positions to be adjusted.

Un autre relais thermique de ce type est décrit dans le document EP-360 215 (état de technique le plus proche). La précontrainte nécessaire au cloquage de la lame est alors produite par un pont de matière repoussé dans le pied de la lame, tandis qu'un support rigide, applicable à pivotement sur un appui et sollicité par une vis de réglage, est fixé au pied de la lame. La réalisation du pont repoussé est particulièrement difficile à reproduire industriellement. De plus, on observe un encombrement trop grand de la lame en hauteur. Enfin, le dispositif n'est pas satisfaisant car, l'appui du support étant éloigné en hauteur de la plage d'application de l'organe de commande sur le doigt de la lame, il entraíne, lors d'une opération de réglage effectuée au moyen de la vis, un déréglage de l'organe de commande.Another thermal relay of this type is described in document EP-360 215 (closest state of the art). The preload necessary to blister the blade is then produced by a bridge of material repelled in the base of the blade, while a rigid support, applicable to pivoting on a support and requested by an adjustment screw, is fixed to the foot of the blade. The realization of the repoussé bridge is particularly difficult to reproduce industrially. In addition, there is too much bulk of the blade in height. Finally, the device is not satisfactory because, the support of the support being distant in height of the range of application of the control member on the finger of the blade, it drives, during an adjustment operation carried out by means of the screw, a adjustment of the control member.

L'invention a pour but de remédier aux inconvénients précités et de rendre fiables et reproductibles les caractéristiques de fabrication, notamment les conditions de réglage, d'un relais thermique du type décrit, tout en lui conférant un faible encombrement.The object of the invention is to remedy the aforementioned drawbacks and to make reliable and reproducible the manufacturing characteristics, in particular the adjustment conditions, a thermal relay of the type described, while giving it a small footprint.

Selon l'invention, le pied de la lame souple présente un prolongement replié pour s'appliquer élastiquement contre une portée du boítier de manière à provoquer une mise en pression de la lame vers l'appui.According to the invention, the base of the flexible blade has a folded extension for apply elastically against a range of the housing so as to cause a pressurization of the blade towards the support.

Le prolongement peut notamment s'étendre à partir du pied de la lame dans le sens de la longueur de celle-ci et être plié, au-delà de la zone de fixation du support rigide sur la lame, en forme de V ou de U par rapport au plan général de la lame, la branche libre du V ou du U étant appliquée contre la portée du boítier. Lorsque la lame est symétrique, le prolongement peut comprendre deux branches symétriques.The extension may in particular extend from the foot of the blade in the direction of its length and be folded, beyond the fixing area of the rigid support on the blade, V-shaped or U-shaped relative to the general plane of the blade, the free branch of V or U being applied against the scope of the housing. When the blade is symmetrical, the extension may include two symmetrical branches.

De préférence, le point d'appui pivotant du support de la lame est situé selon la longueur de la lame sensiblement au niveau de la plage d'application de l'organe de commande sur la lame.Preferably, the pivoting fulcrum of the blade support is located along the length of the blade substantially at the level of the range of application of the control on the blade.

L'organe de réglage peut présenter une came appliquée sur le support rigide de la lame de son côté du point d'appui pivotant, cette came étant capable de tourner autour d'un axe parallèle au plan général de la lame.The adjusting member may have a cam applied to the rigid support of the blade on its side of the pivoting fulcrum, this cam being capable of turning about an axis parallel to the general plane of the blade.

La description est faite ci-après d'un mode de réalisation de l'invention, à titre non limitatif et en regard des dessins annexés.The description is given below of an embodiment of the invention, not for limiting and with reference to the accompanying drawings.

La figure 1 représente en coupe un relais de protection thermique selon l'invention.Figure 1 shows in section a thermal protection relay according to the invention.

La figure 2 est une vue en perspective de la lame élastique cloquante du relaisFigure 2 is a perspective view of the blistering elastic blade of the relay

Les figures 3 et 4 représentent la lame respectivement en élévation de face et de côté. Figures 3 and 4 show the blade respectively in front elevation and side.

Le relais de protection thermique électromécanique illustré comprend un boítier isolant 10 qui offre une face avant 10a dotée d'organes de manoeuvre et de réglage 10b et qui contient des bilames non indiqués, déformables en cas de surintensité dans des lignes de courant de puissance également non indiquées.The illustrated electromechanical thermal protection relay includes a box insulator 10 which offers a front face 10a provided with operating and adjusting members 10b and which contains bimetallic strips not indicated, deformable in the event of overcurrent in power lines also not shown.

Le boítier 10 loge des couples de contacts interrupteurs 11 normalement fermés (NC) et de contacts interrupteurs 12 normalement ouverts (NO), dont les contacts mobiles sont situés aux extrémités de lames élastiques respectives 13,14 commandables par un mécanisme déclencheur 15 en réponse à la déformation d'au moins un bilame. Le mécanisme déclencheur 15 comprend un organe de commande 16 agissant sur une lame souple cloquante 20 qui va agir sur les contacts. L'organe de commande 16 est par exemple un levier pivotant autour d'un axe X1 et dont une partie est formée d'un bilame de compensation de température ambiante.The housing 10 houses pairs of normally closed switch contacts 11 (NC) and normally open switch contacts 12 (NO), including the contacts mobile are located at the ends of respective elastic blades 13,14 controllable by a trigger mechanism 15 in response to the deformation of at least a bimetallic strip. The trigger mechanism 15 includes a control member 16 acting on a flexible blistering blade 20 which will act on the contacts. The organ of control 16 is for example a lever pivoting around an axis X1 and one of which part is formed by an ambient temperature compensation bimetallic strip.

La lame souple 20 s'étend dans le sens de sa longueur sur une distance h et elle est symétrique par rapport à un plan Q qui définit une directrice principale X2 au repos et X'2 en travail. La surface générale de la lame est légèrement incurvée et sera qualifiée par la suite de plan général P. La lame présente un pied 21 en appui par l'intermédiaire d'un support 30 sur une portée 17 du boítier, ainsi qu'une tête 22 et une partie médiane 23.The flexible blade 20 extends in the direction of its length over a distance h and it is symmetrical with respect to a plane Q which defines a principal director X2 at rest and X'2 in work. The general surface of the blade is slightly curved and will later be qualified as a general plan P. The blade has a support foot 21 via a support 30 on a bearing surface 17 of the housing, as well as a head 22 and a middle part 23.

La tête 22 de la lame coopère avec un coulisseau 18 de manoeuvre des contacts 11,12 pour le déplacer selon une direction Y1 parallèle à la face avant 10a du boítier. La partie médiane 23 de la lame, située entre le pied 21 et la tête 22, est dotée d'un doigt 24, en saillie dans une région ajourée 25. Le doigt 24 constitue une plage d'application 24a pour le levier 16 de commande, celui-ci exerçant en cas de surintensité un effort dans une direction Y2 parallèle à la face avant 10a du boítier et contraire à Y1.The head 22 of the blade cooperates with a slide 18 for operating the contacts 11.12 to move it in a direction Y1 parallel to the front face 10a of the housing. The middle part 23 of the blade, located between the foot 21 and the head 22, is provided of a finger 24, projecting into an openwork region 25. The finger 24 constitutes a range 24a for the control lever 16, which acts in the event of an overcurrent an effort in a direction Y2 parallel to the front face 10a of the housing and contrary to Y1.

Au pied 21 de la lame 20 est fixée par tout moyen approprié le support rigide 30, sous forme de plaquette ou d'organe analogue. La plaquette est disposée du côté de la lame opposé au levier 16 et présente à sa partie inférieure une zone de fixation 31, associée à une plage de fixation 26 du pied 21 de la lame, et à sa partie supérieure un point d'appui 32 pour pivoter sur la portée fixe 17 du boítier. At the foot 21 of the blade 20 is fixed by any suitable means the rigid support 30, in the form of a wafer or the like. The plate is arranged on the side of the blade opposite the lever 16 and has at its lower part a fixing zone 31, associated with a fixing range 26 of the foot 21 of the blade, and its part upper a support point 32 for pivoting on the fixed surface 17 of the housing.

Près de son extrémité inférieure 33 et au-dessous de sa zone de fixation 31, la lame 20 ou de préférence la plaquette 30 est sollicitée par un organe de réglage 34 apte à la déplacer selon Y1 ou Y2. L'organe de réglage 34 tourne autour d'un axe X3 et offre une surface de came 35 appliquée sur l'extrémité 33 de la plaquette 30 pour faire pivoter la plaquette 30 et avec elle la lame souple 20 autour de l'axe de pivotement X4 défini par la portée 17 et le point d'appui 32, afin d'ajuster la position de la tête 22 de la lame qui coopère avec le coulisseau. L'organe de réglage 34 est aisément accessible par l'ouverture du boítier avant pose d'un couvercle non représenté. Les axes X1,X3,X4 sont parallèles entre eux et sont perpendiculaires à Y1,Y2 ainsi qu'au plan de symétrie Q de la lame.Near its lower end 33 and below its fixing zone 31, the blade 20 or preferably the plate 30 is biased by an adjusting member 34 able to move it according to Y1 or Y2. The regulating member 34 rotates about an axis X3 and offers a cam surface 35 applied to the end 33 of the insert 30 to rotate the plate 30 and with it the flexible blade 20 around the axis of pivot X4 defined by the bearing 17 and the fulcrum 32, in order to adjust the position of the head 22 of the blade which cooperates with the slide. The regulating member 34 is easily accessible by opening the housing before fitting a cover (not shown). The axes X1, X3, X4 are mutually parallel and are perpendicular to Y1, Y2 as well as on the plane of symmetry Q of the plate.

Selon l'invention, le pied 21 de la lame 20 est muni d'un prolongement 27 constitué soit d'une branche, soit de préférence de deux branches 28,29 élastiques. Le prolongement 27 est dirigé à partir du pied selon la longueur de la lame. Les branches 28,29 sont symétriques par rapport au plan Q. Les branches 28,29 sont rabattues en V ou en U par pliage, avec un angle de rabattement supérieur à 135° et ici proche de 180°, et leur extrémité libre est en appui sur une portée 36 du boítier. On constate que cette configuration de la lame réduit l'encombrement en longueur de la lame tout en produisant la pression recherchée du pivot 32 sur la portée 17.According to the invention, the foot 21 of the blade 20 is provided with an extension 27 constituted either of a branch, or preferably of two elastic branches 28,29. Extension 27 is directed from the foot along the length of the blade. Branches 28,29 are symmetrical with respect to the Q plane. The branches 28,29 are folded down V-shaped or U-shaped by folding, with a folding angle greater than 135 ° and here close 180 °, and their free end is supported on a bearing 36 of the housing. We notes that this configuration of the blade reduces the overall length the blade while producing the desired pressure of the pivot 32 on the bearing surface 17.

L'axe de pivotement X4 est situé, dans le sens de la hauteur de la lame, sensiblement au niveau de la plage d'appui 24a du doigt 24 de la lame, de sorte que le réglage de la position de la tête 22 a une incidence très faible sur la position de repos du levier 16 et donc sur l'état initial du mécanisme de commande. La distance e entre axe X4 et plage 24a peut par exemple être inférieure à 10%; de préférence 7%, de la longueur h de la lame.The pivot axis X4 is located, in the height direction of the blade, substantially at the level of the bearing surface 24a of the finger 24 of the blade, so that the adjustment of the position of the head 22 has a very low impact on the rest position of the lever 16 and therefore on the initial state of the control mechanism. The distance e between axis X4 and range 24a can for example be less than 10%; preferably 7%, of the length h of the blade.

A l'assemblage, la lame 20 est introduite dans le boítier entre l'appui de pivotement 17 et la portée 36 qui assure la mise en pression sur l'appui 17 ; le pied 21 est appliqué contre la came de réglage 35, tandis que la tête est engagée dans le coulisseau 18. Le levier 16 est appliqué sur la plage 24a. Pour ajuster la position de la tête, l'opérateur fait tourner l'organe 34 jusqu'à obtention de la position désirée, sans perturber le mécanisme 15 grâce aux dispositions de l'invention.At assembly, the blade 20 is introduced into the housing between the pivoting support 17 and the bearing surface 36 which pressurizes the support 17; foot 21 is applied against the adjustment cam 35, while the head is engaged in the slide 18. The lever 16 is applied to the track 24a. To adjust the position of the head, the operator rotates the member 34 until the desired position is obtained, without disturbing the mechanism 15 thanks to the provisions of the invention.

Claims (6)

  1. An electromechanical protection relay comprising in a case, thermally deformable components in the case of an overcurrent in power current lines, switch contacts associated with power lines and able to be actuated by a mechanism with a control element able to be stressed by deformable components and acting on a flexible bowing blade (20) which extends along a main directrix (X2), wherein the flexible blade has:
    a foot (21) applied on a prop (17) of the case,
    a head (22) cooperating with a contact maneuvering component (18),
    a middle portion (23) forming an area of application (24a) for the control element,
       wherein the foot (21) of the blade is applied on prop (17) of the case by means of a stiff support (30), the support is fixed to the foot and has a pivoting rest point (32), located at the opposite of the control element with respect to the blade, while an adjustment element (34) stresses the blade in order to adjust the position of it head.
        characterized by the fact that the foot (21) of the flexible blade (20) has a folded back extension (27) so as to be elastically applied against a span (36) of the case in order to cause the compression of the blade on the prop (17).
  2. The protection relay according to claim 1, characterized by the fact that the extension (27) is folded as a V or U with respect to the main plane (P) of the blade and that the free leg (28, 29) of the V or the U is applied against the span (36).
  3. The protection relay according to claim 2, characterized by the fact that the extension (27) is folded beyond the area (26) for fixing the stiff support (30) on blade (20).
  4. The protection relay according to claim 2, characterized by the fact that the extension (27) comprises two symmetrical legs (28, 29) with respect to the symmetry plane (Q) of the blade.
  5. The protection relay according to claim 1, characterized by the fact that the pivoting rest point (32) is located along the length of the blade substantially at the level of the area of application (24a) of the control element (16).
  6. The protection relay according to claim 1, characterized by the fact that the adjustment element (34) has a cam surface (35) applied on the stiff support (30) on the side of the pivoting rest point (32) and is able to rotate around an axis (X3) parallel to the main plane (P) of the blade.
EP99954049A 1998-11-05 1999-11-03 Thermal overload relay provided with a spring leaf mechanism Expired - Lifetime EP1127363B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9813974 1998-11-05
FR9813974A FR2785717B1 (en) 1998-11-05 1998-11-05 THERMAL RELAY WITH SPRING BLADE MECHANISM
PCT/FR1999/002684 WO2000028560A1 (en) 1998-11-05 1999-11-03 Thermal overload relay provided with a spring leaf mechanism

Publications (2)

Publication Number Publication Date
EP1127363A1 EP1127363A1 (en) 2001-08-29
EP1127363B1 true EP1127363B1 (en) 2002-06-05

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ID=9532439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99954049A Expired - Lifetime EP1127363B1 (en) 1998-11-05 1999-11-03 Thermal overload relay provided with a spring leaf mechanism

Country Status (13)

Country Link
US (1) US6507266B1 (en)
EP (1) EP1127363B1 (en)
KR (1) KR100646677B1 (en)
CN (1) CN1192405C (en)
AT (1) ATE218747T1 (en)
AU (1) AU755469B2 (en)
BR (1) BR9915057B1 (en)
DE (1) DE69901727T2 (en)
ES (1) ES2177333T3 (en)
FR (1) FR2785717B1 (en)
RU (1) RU2210829C2 (en)
WO (1) WO2000028560A1 (en)
ZA (1) ZA200103571B (en)

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Publication number Priority date Publication date Assignee Title
US6737599B1 (en) * 2003-07-29 2004-05-18 Emerson Electric Co. Motor starting switch
KR100881365B1 (en) * 2007-08-07 2009-02-02 엘에스산전 주식회사 Trip sensitivity adjusting method for thermal overload protection apparatus
KR100905021B1 (en) * 2007-08-07 2009-06-30 엘에스산전 주식회사 Thermal overload trip apparatus and trip sensitivity adjusting method for the same
JP4906881B2 (en) * 2009-03-27 2012-03-28 富士電機機器制御株式会社 Thermal overload relay
JP4706772B2 (en) * 2009-03-27 2011-06-22 富士電機機器制御株式会社 Thermal overload relay
US8534717B2 (en) * 2009-04-30 2013-09-17 Motorola Solutions, Inc. Interconnect assembly
CN103187213B (en) * 2011-12-29 2015-03-25 上海良信电器股份有限公司 Movement mechanism of thermal overload relay

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Also Published As

Publication number Publication date
ES2177333T3 (en) 2002-12-01
CN1325536A (en) 2001-12-05
EP1127363A1 (en) 2001-08-29
FR2785717B1 (en) 2000-12-08
BR9915057B1 (en) 2015-02-24
KR20010089401A (en) 2001-10-06
RU2210829C2 (en) 2003-08-20
AU755469B2 (en) 2002-12-12
FR2785717A1 (en) 2000-05-12
WO2000028560A1 (en) 2000-05-18
DE69901727T2 (en) 2002-10-31
DE69901727D1 (en) 2002-07-11
ATE218747T1 (en) 2002-06-15
KR100646677B1 (en) 2006-11-17
ZA200103571B (en) 2002-05-03
US6507266B1 (en) 2003-01-14
CN1192405C (en) 2005-03-09
AU1051000A (en) 2000-05-29
BR9915057A (en) 2001-08-07

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