EP0715327B1 - Device against calibration reduction after adaption of an auxiliary - Google Patents

Device against calibration reduction after adaption of an auxiliary Download PDF

Info

Publication number
EP0715327B1
EP0715327B1 EP95410119A EP95410119A EP0715327B1 EP 0715327 B1 EP0715327 B1 EP 0715327B1 EP 95410119 A EP95410119 A EP 95410119A EP 95410119 A EP95410119 A EP 95410119A EP 0715327 B1 EP0715327 B1 EP 0715327B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
auxiliary
actuator
bosses
pole
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
EP95410119A
Other languages
German (de)
French (fr)
Other versions
EP0715327A1 (en
Inventor
Michel Bonniau
Michel Dell'ova
Didier Lebouc
Jean Caire
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 EP0715327A1 publication Critical patent/EP0715327A1/en
Application granted granted Critical
Publication of EP0715327B1 publication Critical patent/EP0715327B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism

Definitions

  • the present invention relates to an anti-derating device for a circuit breaker following the adaptation of an auxiliary such as in particular a differential protection device, this device comprising the circuit breaker and the auxiliary, this circuit breaker being provided with at least one adjusting screw arranged to perform a initial setting of a thermal release and define the thermal protection of the circuit breaker corresponding to its rating.
  • auxiliary such as in particular a differential protection device
  • this circuit breaker being provided with at least one adjusting screw arranged to perform a initial setting of a thermal release and define the thermal protection of the circuit breaker corresponding to its rating.
  • the thermal overload protection is set at the factory taking into account the heating of the cables as well as the own dissipation the device.
  • This heat dissipation by Joule effect is due to internal resistances and is evacuated by the external faces in contact with the ambient air as well as by the cables feed.
  • an auxiliary such as for example a device of differential protection
  • the balance of thermal exchanges of the circuit breaker is modified due in particular to the reduction in exchange surfaces with air ambient, local modification at the outlet and through the auxiliary sections of conductors, of the auxiliary heat dissipation and of the limitation of evacuation by power cables. Because of these balance changes, the circuit breaker trips earlier on overload and should normally be derated in caliber to continue to provide the protection provided.
  • the present invention proposes to solve this problem in a simple and automatic during the adaptation of the auxiliary.
  • the caliber anti-downgrade device is characterized in that it includes means arranged to perform a new automatic setting of the trigger thermal during the adaptation of the auxiliary, said means comprising at least one actuator integral with the auxiliary and arranged to perform said new setting of the thermal trip device by acting on a receiving member secured to the circuit breaker.
  • said actuator consists of a apparent protuberance on a lateral flank of the auxiliary.
  • the recipient organ is consisting of a thermal trip bar, one end of which is arranged opposite a window in a side face of the circuit breaker correspondence with said actuator.
  • an auxiliary 10 such as for example a device for earth leakage protection, seen from the side, is designed to be fitted to a circuit breaker 11 also shown seen from the side.
  • the auxiliary is equipped with an actuator 12 arranged to act automatically on a receiving member 13, this receiving member being designed to automatically reset the thermal release on each pole of the circuit breaker, when adapting the auxiliary to the circuit breaker.
  • the actuator 12 is constituted by an apparent protuberance on a lateral face of the auxiliary and the receiving member 13 is constituted by an adjustment bar of the thermal trip device, the end of this bar being placed opposite a window 14 formed in a lateral face of the circuit breaker, in correspondence with said protuberance constituting the actuator 12.
  • FIG. 2 illustrates, seen in section, a multipole circuit breaker 11 intended to receive a auxiliary 10 equipped with an actuator 12.
  • the electrical coupling is carried out by means of conductors 15 which extend laterally at the base of the auxiliary and which have bent branches allowing connection to the poles of the circuit breaker.
  • the thermal trip device 16 has associated bimetallic strips 16a, 16b, 16c and 16d respectively at each pole of the circuit breaker.
  • the receiving member 13 is made up by an adjustment bar 17 at two levels defined by the presence of bosses 17a, 17b, 17c and 17d having a cam function to act on the position of the bimetallic strips 16a, 16b, 16c and 16d.
  • the bimetallic strips In the initial state corresponding to use of the circuit breaker without auxiliary, the bimetallic strips occupy a first position, called the low position. In the state final, corresponding to the use of the circuit breaker after adaptation of the auxiliary, the bimetallic strips occupy a second position, called the upper position, defined by the bosses 17a, 17b, 17c and 17d.
  • This second position takes into account the new distribution of heat exchanges due to the addition of the auxiliary. It is obtained by a displacement of the adjustment bar 17, in the direction of arrow A, generated by the thrust exerted by the actuator 12 which enters a window 14 identical to that defined with reference to Figure 1 and rests on the end of this bar.
  • This the bar also comprises a support stop 18 of a return spring 19. During the displacement of the adjustment bar from the first to the second position, the spring is compressed. If the auxiliary is removed, the adjustment bar can return to its first position under the action of the return spring 19. In this case, the bimetallic strips resume their so-called
  • the new setting of the bimetallic strips 16a, 16b, 16c and 16d is carried out in function of their distance from the face of the circuit breaker 11 adjacent to the auxiliary 10.
  • the auxiliary is provided with an actuator 12 which engages in a window 14 arranged in the lateral side of the circuit breaker, facing the end of the adjustment bar 27.
  • FIG. 4 illustrates an embodiment according to which it acts on the base or the foot of the bimetallic strips.
  • a bimetallic strip 30 is mounted on a base 31 which has an element 32 in U-shaped, one branch 32a of which has an adjusting screw 33 and the other branch of which 32b is linked to the rectilinear active blade 34 of the bimetallic strip.
  • the central part of element 32 U-shaped is mounted on a support 35 pivoting on a fixed axis 36 integral with the circuit breaker.
  • a branch 37, integral with this support is, firstly supported on the adjustment bar 38 and, on the other hand pushed against this bar by a spiral spring 39.
  • the initial setting of the bimetal setting is carried out by means of the adjusting screw 33 which is engaged in two nuts 40 and 41 arranged on either side of the branch 32a of element U-shaped 32. The end of this screw bears against the other branch 32b of this element. Wedging consists in spreading the two branches apart appropriate. It makes it possible to adjust the spacing x of the end of the active blade 34 by compared to a link 42 for triggering in the event of overheating.
  • the action of the bar adjustment 38 consists in acting on the initial spacing x by pivoting the base of the bimetallic strip on axis 36.
  • FIG. 5 illustrates another operating mode according to which the bar acts directly on a trigger rod 50 in the event of overheating and no longer on the bimetallic strip.
  • the active blade 51 of the bimetallic strip is secured to an angled base 52.
  • An adjustment screw 53 makes it possible to adjust the initial spacing x 2 of the end of the active blade relative to the rod 50, by modifying the angle of the elbow formed by the bent base 52, one branch of which is secured to the circuit breaker case and the other branch is free.
  • the adjustment bar 54 acts on the position of the link 50. In the absence of an auxiliary, this link occupies a position shown in solid lines, and the spacing between the active blade and the link is x 2 .
  • FIG. 6 illustrates an embodiment in which the circuit breaker 11 can be associated with two auxiliaries 10a and 10b which each include an actuator, 12a and 12b respectively.
  • the circuit breaker must include two adjustment bars whose effects combine to ensure a new setting bimetallic strips taking into account the new equilibrium conditions of dissipation thermal due to the addition of auxiliaries.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The thermal trip device of the multipole circuit-breaker (11) requires readjustment after the introduction of an auxiliary device such as a differential protection device (10) with an actuator (12) aligned with a receiver (13). Electrical coupling is provided by conductors (15) extending laterally from the base of the auxiliary with elbowed branches for connection to the circuit-breaker poles. Automatic readjustment is effected by a bar (17) with a return spring (19) and raised portions (17a-17d) which impinge upon the bimetallic strips (16a-16d) of the separate poles.

Description

La présente invention concerne un dispositif anti-déclassement d'un disjoncteur suite à l'adaptation d'un auxiliaire tel que notamment un dispositif de protection différentielle, ce dispositif comprenant le disjoncteur et l'auxiliaire, ce disjoncteur étant pourvu d'au moins une vis de réglage agencée pour effectuer un calage initial d'un déclencheur thermique et définir la protection thermique du disjoncteur correspondant à son calibre. Un tel dispositif est connu par le document US-A-41 004.The present invention relates to an anti-derating device for a circuit breaker following the adaptation of an auxiliary such as in particular a differential protection device, this device comprising the circuit breaker and the auxiliary, this circuit breaker being provided with at least one adjusting screw arranged to perform a initial setting of a thermal release and define the thermal protection of the circuit breaker corresponding to its rating. Such a device is known from document US-A-41 004.

Dans un disjoncteur, la protection thermique contre les surcharges est réglée en usine en tenant compte des échauffements des câbles ainsi que de la propre dissipation thermique de l'appareil.In a circuit breaker, the thermal overload protection is set at the factory taking into account the heating of the cables as well as the own dissipation the device.

Cette dissipation thermique par effet Joule est due aux résistances internes et s'évacue par les faces extérieures en contact avec l'air ambiant ainsi que par les câbles d'alimentation. Lors de l'adaptation d'un auxiliaire, tel que par exemple un dispositif de protection différentielle, l'équilibre des échanges thermiques du disjoncteur est modifié en raison notamment de la réduction des surfaces d'échange avec l'air ambiant, de la modification locale en sortie et à travers l'auxiliaire des sections des conducteurs, de la dissipation thermique propre à l'auxiliaire et de la limitation de l'évacuation par les câbles d'alimentation. En raison de ces modifications d'équilibre, le disjoncteur déclenche plus tôt en surcharge et doit normalement être déclassé en calibre pour continuer à assurer la protection prévue.This heat dissipation by Joule effect is due to internal resistances and is evacuated by the external faces in contact with the ambient air as well as by the cables feed. When adapting an auxiliary, such as for example a device of differential protection, the balance of thermal exchanges of the circuit breaker is modified due in particular to the reduction in exchange surfaces with air ambient, local modification at the outlet and through the auxiliary sections of conductors, of the auxiliary heat dissipation and of the limitation of evacuation by power cables. Because of these balance changes, the circuit breaker trips earlier on overload and should normally be derated in caliber to continue to provide the protection provided.

Diverses solutions permettent d'atténuer ce phénomène, par exemple le grossissement des sections de conducteurs de l'auxiliaire, la réalisation d'ouïes de ventilation, la mise en place d'écrans thermiques. Ces solutions ne sont cependant pas complètement satisfaisantes, notamment sur les appareils de fort calibre.Various solutions can mitigate this phenomenon, for example magnification sections of auxiliary conductors, the realization of ventilation louvers, the in place of heat shields. However, these solutions are not completely satisfactory, especially on heavy gauge devices.

La présente invention se propose de résoudre ce problème d'une manière simple et automatique lors de l'adaptation de l'auxiliaire.The present invention proposes to solve this problem in a simple and automatic during the adaptation of the auxiliary.

Le dispositif anti-déclassement en calibre est caractérisé en ce que qu'il comprend des moyens agencés pour effectuer un nouveau calage automatique du déclencheur thermique lors de l'adaptation de l'auxiliaire, lesdits moyens comprenant au moins un actionneur solidaire de l'auxiliaire et agencé pour effectuer ledit nouveau calage du déclencheur thermique en agissant sur un organe récepteur solidaire du disjoncteur.The caliber anti-downgrade device is characterized in that it includes means arranged to perform a new automatic setting of the trigger thermal during the adaptation of the auxiliary, said means comprising at least one actuator integral with the auxiliary and arranged to perform said new setting of the thermal trip device by acting on a receiving member secured to the circuit breaker.

Selon un mode de réalisation préférentiel, ledit actionneur est constitué par une protubérance apparente sur un flanc latéral de l'auxiliaire. L'organe récepteur est constitué par un barreau d'ajustage du déclencheur thermique, dont une extrémité est disposée en regard d'une fenêtre ménagée dans une face latérale du disjoncteur en correspondance avec ledit actionneur.According to a preferred embodiment, said actuator consists of a apparent protuberance on a lateral flank of the auxiliary. The recipient organ is consisting of a thermal trip bar, one end of which is arranged opposite a window in a side face of the circuit breaker correspondence with said actuator.

La présente invention et ses principaux avantages seront mieux compris en référence à la description d'une forme de réalisation préférée et aux dessins annexés donnés à titre d'exemple non limitatifs dans lesquels :

  • la figure 1 est une vue schématique illustrant les faces latérales d'un disjoncteur et d'un auxiliaire pourvus du dispositif selon l'invention,
  • la figure 2 représente une vue schématique d'une première forme de réalisation du dispositif selon l'invention,
  • la figure 3 représente une vue schématique d'une deuxième forme de réalisation du dispositif selon l'invention,
  • la figure 4 représente une vue détaillée illustrant un premier mode de fonctionnement du dispositif de l'invention,
  • la figure 5 représente une vue détaillée illustrant un deuxième mode de fonctionnement du dispositif de l'invention,
  • la figure 6 est une vue schématique illustrant un disjoncteur associé à deux auxiliaires,
    • The present invention and its main advantages will be better understood with reference to the description of a preferred embodiment and to the accompanying drawings given by way of non-limiting example in which:
  • FIG. 1 is a schematic view illustrating the lateral faces of a circuit breaker and an auxiliary provided with the device according to the invention,
  • FIG. 2 represents a schematic view of a first embodiment of the device according to the invention,
  • FIG. 3 represents a schematic view of a second embodiment of the device according to the invention,
  • FIG. 4 represents a detailed view illustrating a first mode of operation of the device of the invention,
  • FIG. 5 represents a detailed view illustrating a second mode of operation of the device of the invention,
  • FIG. 6 is a schematic view illustrating a circuit breaker associated with two auxiliaries,

    • En référence à la figure 1, un auxiliaire 10 tel que par exemple un dispositif de protection différentielle, vu de côté, est prévu pour être adapté sur un disjoncteur 11 également représenté vu de côté. L'auxiliaire est équipé d'un actionneur 12 agencé pour agir automatiquement sur un organe récepteur 13, cet organe récepteur étant conçu pour effectuer automatiquement un nouveau calage du déclencheur thermique sur chacun des pôles du disjoncteur, lors de l'adaptation de l'auxiliaire au disjoncteur. L'actionneur 12 est constitué par une protubérance apparente sur une face latérale de l'auxiliaire et l'organe récepteur 13 est constitué par un barreau d'ajustage du déclencheur thermique, l'extrémité de ce barreau étant disposée en regard d'une fenêtre 14 ménagée dans une face latérale du disjoncteur, en correspondance avec ladite protubérance constituant l'actionneur 12.Referring to Figure 1, an auxiliary 10 such as for example a device for earth leakage protection, seen from the side, is designed to be fitted to a circuit breaker 11 also shown seen from the side. The auxiliary is equipped with an actuator 12 arranged to act automatically on a receiving member 13, this receiving member being designed to automatically reset the thermal release on each pole of the circuit breaker, when adapting the auxiliary to the circuit breaker. The actuator 12 is constituted by an apparent protuberance on a lateral face of the auxiliary and the receiving member 13 is constituted by an adjustment bar of the thermal trip device, the end of this bar being placed opposite a window 14 formed in a lateral face of the circuit breaker, in correspondence with said protuberance constituting the actuator 12.

    La figure 2 illustre, vu en coupe, un disjoncteur multipolaire 11 destiné à recevoir un auxiliaire 10 équipé d'un actionneur 12. Le couplage électrique s'effectue au moyen de conducteurs 15 qui s'étendent latéralement à la base de l'auxiliaire et qui présentent des branches coudées permettant le raccordement aux pôles du disjoncteur. Le déclencheur thermique 16 comporte des bilames 16a, 16b, 16c et 16d associés respectivement à chacun des pôles du disjoncteur. L'organe récepteur 13 est constitué par un barreau d'ajustage 17 à deux niveaux définis par la présence de bossages 17a, 17b, 17c et 17d ayant une fonction de cames pour agir sur la position des bilames 16a, 16b, 16c et 16d. Dans l'état initial correspondant à une utilisation du disjoncteur sans auxiliaire, les bilames occupent une première position, dite position basse. Dans l'état final, correspondant à une utilisation du disjoncteur après adaptation de l'auxiliaire, les bilames occupent une seconde position, dite position haute, définie par les bossages 17a, 17b, 17c et 17d. Cette seconde position tient compte de la nouvelle répartition des échanges thermiques due à l'adjonction de l'auxiliaire. Elle est obtenue par un déplacement du barreau d'ajustage 17, dans le sens de la flèche A, engendré par la poussée exercée par l'actionneur 12 qui pénètre dans une fenêtre 14 identique à celle définie en référence à la figure 1 et prend appui sur l'extrémité de ce barreau. Ce barreau comporte par ailleurs une butée d'appui 18 d'un ressort de rappel 19. Lors du déplacement du barreau d'ajustage de la première vers la seconde position, le ressort est comprimé. En cas de retrait de l'auxiliaire, le barreau d'ajustage peut revenir dans sa première position sous l'action du ressort de rappel 19. Dans ce cas, les bilames reprennent leur position dite basse.FIG. 2 illustrates, seen in section, a multipole circuit breaker 11 intended to receive a auxiliary 10 equipped with an actuator 12. The electrical coupling is carried out by means of conductors 15 which extend laterally at the base of the auxiliary and which have bent branches allowing connection to the poles of the circuit breaker. The thermal trip device 16 has associated bimetallic strips 16a, 16b, 16c and 16d respectively at each pole of the circuit breaker. The receiving member 13 is made up by an adjustment bar 17 at two levels defined by the presence of bosses 17a, 17b, 17c and 17d having a cam function to act on the position of the bimetallic strips 16a, 16b, 16c and 16d. In the initial state corresponding to use of the circuit breaker without auxiliary, the bimetallic strips occupy a first position, called the low position. In the state final, corresponding to the use of the circuit breaker after adaptation of the auxiliary, the bimetallic strips occupy a second position, called the upper position, defined by the bosses 17a, 17b, 17c and 17d. This second position takes into account the new distribution of heat exchanges due to the addition of the auxiliary. It is obtained by a displacement of the adjustment bar 17, in the direction of arrow A, generated by the thrust exerted by the actuator 12 which enters a window 14 identical to that defined with reference to Figure 1 and rests on the end of this bar. This the bar also comprises a support stop 18 of a return spring 19. During the displacement of the adjustment bar from the first to the second position, the spring is compressed. If the auxiliary is removed, the adjustment bar can return to its first position under the action of the return spring 19. In this case, the bimetallic strips resume their so-called low position.

    Dans cette réalisation, tous les bossages 17a, 17b, 17c et 17d ont les mêmes dimensions et notamment la même hauteur. De ce fait, le nouveau calage des bilames lors de l'adjonction d'un auxiliaire est le même pour tous les pôles du disjoncteur.In this embodiment, all the bosses 17a, 17b, 17c and 17d have the same dimensions and in particular the same height. Therefore, the new calibration of bimetallic strips when adding an auxiliary is the same for all the poles of the circuit breaker.

    On admet dans ce cas que l'incidence de l'adjonction d'un auxiliaire est la même pour tous les pôles. Dans la pratique, l'équilibre des échanges thermiques dus à l'adjonction d'un auxiliaire est différent d'un pôle à l'autre. En effet, si l'auxiliaire est monté d'un côté du différentiel, le pôle le plus proche est le plus fortement perturbé. La perturbation s'atténue à mesure que les pôles s'éloignent de la paroi du disjoncteur accolée à l'auxiliaire. Une variante de la réalisation précédente, illustrée par le figure 3, tient compte de ce fait. Le barreau d'ajustage 27 comporte dans ce cas des bossages 27a, 27b, 27c et 27d qui ont une hauteur croissante de gauche à droite sur la figure. De cette manière, le nouveau calage des bilames 16a, 16b, 16c et 16d est effectué en fonction de leur éloignement de la face du disjoncteur 11 adjacente à l'auxiliaire 10. Comme précédemment, l'auxiliaire est pourvu d'un actionneur 12 qui s'engage dans une fenêtre 14 aménagée dans le côté latéral du disjoncteur, en regard de l'extrémité du barreau d'ajustage 27. Par cette réalisation, on obtient un étagement progressif du nouveau calage des bilames.It is assumed in this case that the incidence of the addition of an auxiliary is the same for all the poles. In practice, the balance of heat exchanges due to the addition of an auxiliary is different from one pole to another. Indeed, if the auxiliary is mounted aside the differential, the nearest pole is the most severely disturbed. The disturbance lessens as the poles move away from the circuit breaker wall attached to the auxiliary. A variant of the previous embodiment, illustrated by the figure 3, takes this fact into account. The adjustment bar 27 in this case has bosses 27a, 27b, 27c and 27d which have an increasing height from left to right in the figure. Of in this way, the new setting of the bimetallic strips 16a, 16b, 16c and 16d is carried out in function of their distance from the face of the circuit breaker 11 adjacent to the auxiliary 10. As before, the auxiliary is provided with an actuator 12 which engages in a window 14 arranged in the lateral side of the circuit breaker, facing the end of the adjustment bar 27. By this embodiment, a gradual staging of the new calibration of bimetallic strips.

    L'action du barreau d'ajustage sur les bilames peut se faire de différentes manières. La figure 4 illustre un mode de réalisation selon lequel il agit sur la base ou le pied des bilames. Un bilame 30 est monté sur une base 31 qui comporte un élément 32 en forme de U dont une branche 32a porte une vis de réglage 33 et dont l'autre branche 32b est liée à la lame active rectiligne 34 du bilame. La partie centrale de l'élément 32 en forme de U est montée sur un support 35 pivotant sur un axe fixe 36 solidaire du disjoncteur. Une branche 37, solidaire de ce support est, d'une part en appui sur le barreau d'ajustage 38 et, d'autre part poussée contre ce barreau par un ressort spiral 39. Le réglage initial du calage du bilame s'effectue au moyen de la vis de réglage 33 qui est engagée dans deux écrous 40 et 41 disposés de part et d'autre de la branche 32a de l'élément 32 en forme de U. L'extrémité de cette vis prend appui contre l'autre branche 32b de cet élément. Le calage consiste à écarter les deux branches de manière appropriée. Il permet de régler l'écartement x de l'extrémité de la lame active 34 par rapport à une biellette 42 de déclenchement en cas de surchauffe. L'action du barreau d'ajustage 38 consiste à agir sur l'écartement initial x en faisant pivoter la base du bilame sur l'axe 36.The action of the adjustment bar on the bimetallic strips can be done in different ways. The FIG. 4 illustrates an embodiment according to which it acts on the base or the foot of the bimetallic strips. A bimetallic strip 30 is mounted on a base 31 which has an element 32 in U-shaped, one branch 32a of which has an adjusting screw 33 and the other branch of which 32b is linked to the rectilinear active blade 34 of the bimetallic strip. The central part of element 32 U-shaped is mounted on a support 35 pivoting on a fixed axis 36 integral with the circuit breaker. A branch 37, integral with this support is, firstly supported on the adjustment bar 38 and, on the other hand pushed against this bar by a spiral spring 39. The initial setting of the bimetal setting is carried out by means of the adjusting screw 33 which is engaged in two nuts 40 and 41 arranged on either side of the branch 32a of element U-shaped 32. The end of this screw bears against the other branch 32b of this element. Wedging consists in spreading the two branches apart appropriate. It makes it possible to adjust the spacing x of the end of the active blade 34 by compared to a link 42 for triggering in the event of overheating. The action of the bar adjustment 38 consists in acting on the initial spacing x by pivoting the base of the bimetallic strip on axis 36.

    La figure 5 illustre un autre mode de fonctionnement selon lequel le barreau agit directement sur une biellette 50 de déclenchement en cas de surchauffe et non plus sur le bilame. Dans cette construction, la lame active 51 du bilame est solidaire d'une base coudée 52. Une vis de réglage 53 permet de régler l'écartement initial x 2 de l'extrémité de la lame active par rapport à la biellette 50, en modifiant l'angle du coude formé par la base coudée 52 dont une branche est solidaire du boítier du disjoncteur et l'autre branche est libre. Le barreau d'ajustage 54 agit sur la position de la biellette 50. En l'absence d'auxiliaire, cette biellette occupe une position représentée en traits pleins, et l'écartement entre la lame active et la biellette est x 2. Lors de la mise en place d'un auxiliaire, le barreau d'ajustage est poussé et un bossage 55, identique à ceux décrits en référence aux figures 2 et 3, a pour effet de déplacer la biellette 50 dans une position représentée en traits interrompus. Dans cette position, l'écartement entre cette biellette et la lame active est modifiée et portée à la valeur x 1.FIG. 5 illustrates another operating mode according to which the bar acts directly on a trigger rod 50 in the event of overheating and no longer on the bimetallic strip. In this construction, the active blade 51 of the bimetallic strip is secured to an angled base 52. An adjustment screw 53 makes it possible to adjust the initial spacing x 2 of the end of the active blade relative to the rod 50, by modifying the angle of the elbow formed by the bent base 52, one branch of which is secured to the circuit breaker case and the other branch is free. The adjustment bar 54 acts on the position of the link 50. In the absence of an auxiliary, this link occupies a position shown in solid lines, and the spacing between the active blade and the link is x 2 . When setting up an auxiliary, the adjustment bar is pushed and a boss 55, identical to those described with reference to FIGS. 2 and 3, has the effect of displacing the rod 50 in a position shown in broken lines . In this position, the spacing between this link and the active blade is modified and brought to the value x 1 .

    La figure 6 illustre un mode de réalisation dans lequel le disjoncteur 11 peut être associé à deux auxiliaires 10a et 10b qui comportent chacun un actionneur, respectivement 12a et 12b. Dans une telle construction, le disjoncteur doit comporter deux barreaux d'ajustage dont les effets se conjuguent pour assurer un nouveau calage des bilames en tenant compte des nouvelles conditions d'équilibre de la dissipation thermique dues à l'adjonction des auxiliaires.FIG. 6 illustrates an embodiment in which the circuit breaker 11 can be associated with two auxiliaries 10a and 10b which each include an actuator, 12a and 12b respectively. In such a construction, the circuit breaker must include two adjustment bars whose effects combine to ensure a new setting bimetallic strips taking into account the new equilibrium conditions of dissipation thermal due to the addition of auxiliaries.

    Toutes ces réalisations correspondent à un nouveau calage des bilames, qui s'effectue automatiquement au moment où un opérateur associe au disjoncteur un ou deux auxiliaires adaptés sur les faces latérales de ce disjoncteur. Cet automatisme est dû à l'interaction du ou des déclencheurs sur le ou les barreaux d'ajustage.All these achievements correspond to a new calibration of bimetallic strips, which takes place automatically when an operator associates one or two with the circuit breaker auxiliary devices fitted on the side faces of this circuit breaker. This automatism is due to the interaction of the trigger (s) on the adjustment bar (s).

    Claims (10)

    1. A device for preventing downrating of a circuit breaker following fitting of an add-on auxiliary such as in particular a differential protection device, this device comprising the circuit breaker and the auxiliary, this circuit breaker being provided with at least one adjusting screw arranged to perform an initial setting of a thermal trip device and to define the thermal protection of the circuit breaker (11, 60) corresponding to its rating,
      characterized in that it comprises means arranged to perform a new automatic setting of the thermal trip device when the add-on auxiliary (10, 67) is fitted, said means comprising at least one actuator (12, 12a, 12b) securedly united to the auxiliary and arranged to perform said new setting of the thermal trip device by acting on a receiver part (13) securedly united to the circuit breaker.
    2. The device according to claim 1, characterized in that said actuator is arranged to act on a bimetal strip for each pole-unit of the circuit breaker (60).
    3. The device according to claim 1, characterized in that said actuator is arranged to act on a rod of a trip mechanism associated to a bimetal strip for each pole-unit of the circuit breaker (60).
    4. The device according to claim 1, characterized in that said actuator (12, 12a, 12b) is formed by a protuberance apparent on a side wall of the auxiliary.
    5. The device according to claim 1, characterized in that said receiver part (13) is formed by an adjusting bar (17) of the thermal trip device, one end of which is located facing a window (14) arranged in a side panel of the circuit breaker in correspondence with said actuator.
    6. The device according to claim 5, characterized in that said adjusting bar (17) comprises bosses (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) arranged to co-operate in the manner of cams on the position of a component of the thermal trip device corresponding to each pole-unit of the circuit breaker.
    7. The device according to claim 6, characterized in that the bosses (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) of the adjusting bar (17) are arranged to act respectively on bimetal strips (16a, 16b, 16c, 16d) of the thermal trip device of each pole-unit of the circuit breaker.
    8. The device according to claim 6, characterized in that the bosses (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) of the adjusting bar (17) are arranged to act respectively on a rod (42, 50) of a tripping mechanism associated to a bimetal strip for each pole-unit of the circuit breaker.
    9. The device according to claim 6, characterized in that said bosses (17a, 17b, 17c, 17d) are of equal height.
    10. The device according to claim 6, characterized in that said bosses (27a, 27b, 27c, 27d) are of different height.
    EP95410119A 1994-11-28 1995-10-16 Device against calibration reduction after adaption of an auxiliary Expired - Lifetime EP0715327B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9414477 1994-11-28
    FR9414477A FR2727567B1 (en) 1994-11-28 1994-11-28 ANTI-DEGRADING DEVICE IN CALIBRATION OF A CIRCUIT BREAKER FOLLOWING THE ADAPTATION OF AN AUXILIARY

    Publications (2)

    Publication Number Publication Date
    EP0715327A1 EP0715327A1 (en) 1996-06-05
    EP0715327B1 true EP0715327B1 (en) 2001-06-13

    Family

    ID=9469394

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95410119A Expired - Lifetime EP0715327B1 (en) 1994-11-28 1995-10-16 Device against calibration reduction after adaption of an auxiliary

    Country Status (7)

    Country Link
    EP (1) EP0715327B1 (en)
    CN (1) CN1055175C (en)
    AT (1) ATE202238T1 (en)
    AU (1) AU691989B2 (en)
    DE (1) DE69521273D1 (en)
    FR (1) FR2727567B1 (en)
    RU (1) RU2107354C1 (en)

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3831120A (en) * 1973-11-08 1974-08-20 Gen Electric Trip unit having improved trip adjustment indicator and circuit breaker incorporating same
    US3950717A (en) * 1975-02-21 1976-04-13 Westinghouse Electric Corporation Multi-pole circuit breaker with adjustable thermal trip unit
    US4148004A (en) * 1977-05-04 1979-04-03 Westinghouse Electric Corp. Circuit breaker with calibrating means
    DE3812934A1 (en) * 1988-04-19 1989-11-02 Sursum Elektrizitaetsgesellsch MULTI-PHASE CIRCUIT BREAKER
    FR2641933B1 (en) * 1988-12-23 1996-06-07 Hager Electro HOUSING FOR MODULAR ELECTRICAL APPLIANCES AND SHUTTERING DEVICE FOR SUCH A HOUSING

    Also Published As

    Publication number Publication date
    AU3907095A (en) 1996-06-06
    FR2727567B1 (en) 1997-01-03
    RU2107354C1 (en) 1998-03-20
    ATE202238T1 (en) 2001-06-15
    FR2727567A1 (en) 1996-05-31
    CN1131804A (en) 1996-09-25
    EP0715327A1 (en) 1996-06-05
    DE69521273D1 (en) 2001-07-19
    AU691989B2 (en) 1998-05-28
    CN1055175C (en) 2000-08-02

    Similar Documents

    Publication Publication Date Title
    EP2232518B1 (en) Protection device against overvoltage including a disconnection accessory
    EP1975971B1 (en) Device for controlling an electric protection device and electric protection device including same
    FR2779568A1 (en) ELECTRICAL CUT-OFF DEVICE INCLUDING A DIFFERENTIAL TRIP DEVICE AND CIRCUIT BREAKER INCLUDING SUCH A DEVICE
    EP1181704B1 (en) Protection relay and protected control set with front wiring
    FR2998415A1 (en) MAGNETOTHERMIC TRIGGER TRIPPING OF A POLYPHASE CIRCUIT BREAKER
    EP0715327B1 (en) Device against calibration reduction after adaption of an auxiliary
    EP0147278A2 (en) Thermal-magnetic tripping mechanism of a circuit breaker made of shape memory effect material
    EP2365510B1 (en) Circuit breaker
    EP2411995B1 (en) Thermal-magnetic tripping mechanism
    EP2743959B1 (en) Thermal trip device and current breaking apparatus comprising one such device
    EP2743958B1 (en) Electric current breaking apparatus, in particular a coupling breaker
    BE1004593A3 (en) Selective device for the prohibition of one or more modes of operation organ hand control equipment fitted.
    EP1127363A1 (en) Thermal overload relay provided with a spring leaf mechanism
    EP1649478B1 (en) Rotary engagement lock mechanism for automatic safety cutout
    EP2237302B1 (en) Thermal trip device for electrical protection device
    FR2553928A1 (en) Mixed-mode heated bimetallic strip for thermal trip of a cutoff device
    EP2743947B1 (en) Support shaft of the movable contacts in an electric current breaking apparatus, and current breaking apparatus comprising same, in particular a coupling breaker
    EP3091557B1 (en) Device for controlling an electrical protection unit and electrical protection unit comprising same
    EP3300532B1 (en) Electrical device of circuit breaker type
    BE734315A (en)
    FR2766292A1 (en) DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION APPARATUS SUCH AS A CIRCUIT BREAKER INCLUDING MEANS FOR SIGNALING A TRIGGER, AND CIRCUIT BREAKER PROVIDED WITH SUCH A DEVICE
    FR2770335A1 (en) Resetting mechanism for differential circuit breaker
    FR2497601A1 (en) Floating lever locking mechanism for LV circuit breaker - uses floating lever actuated on one side by short circuit on overload-time actuator
    EP0218497A1 (en) Protective circuit breaker with a resilient link
    LU83136A1 (en) IMPROVEMENTS ON A MANUALLY CLOSED SAFETY CIRCUIT BREAKER AND MAGNETIC AND THERMAL UNLOCKING UNITS

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE DE ES GB IT NL PT SE

    17P Request for examination filed

    Effective date: 19961125

    17Q First examination report despatched

    Effective date: 19990311

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: SCHNEIDER ELECTRIC INDUSTRIES SA

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: SCHNEIDER ELECTRIC INDUSTRIES SA

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE DE ES GB IT NL PT SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010613

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

    Effective date: 20010613

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010613

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010613

    REF Corresponds to:

    Ref document number: 202238

    Country of ref document: AT

    Date of ref document: 20010615

    Kind code of ref document: T

    REF Corresponds to:

    Ref document number: 69521273

    Country of ref document: DE

    Date of ref document: 20010719

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010913

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010914

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20010917

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20011031

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

    Effective date: 20010613

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20011220

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    BERE Be: lapsed

    Owner name: S.A. SCHNEIDER ELECTRIC INDUSTRIES

    Effective date: 20011031

    26N No opposition filed