EP0140761B1 - Operating mechanism for a low-voltage multi-pole circuit breaker - Google Patents
Operating mechanism for a low-voltage multi-pole circuit breaker Download PDFInfo
- Publication number
- EP0140761B1 EP0140761B1 EP84401961A EP84401961A EP0140761B1 EP 0140761 B1 EP0140761 B1 EP 0140761B1 EP 84401961 A EP84401961 A EP 84401961A EP 84401961 A EP84401961 A EP 84401961A EP 0140761 B1 EP0140761 B1 EP 0140761B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- handle
- lever
- trip
- bar
- operating mechanism
- 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
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
- H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
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- 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
- H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/503—Means for increasing the opening stroke of the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/521—Details concerning the lever handle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- 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
Definitions
- the invention relates to a control mechanism of a multipole circuit breaker with molded insulating housing, according to the preamble of claim 1.
- the handle is supported by a metal cradle or bracket in the shape of an inverted U, pivotally mounted on a fixed axis subject to the plates of the mechanism.
- the trajectory of the joystick has a small pivot radius due to the presence of the material axis of the cradle inside the housing.
- the switching bar and / or the trigger bar are generally arranged outside the trajectory of the lever.
- Document US-A-2 806 103 relates to a single-pole circuit breaker with molded insulating housing, formed by the assembly of a base and a cover.
- the lever of the mechanism comprises an internal base laterally equipped with two guide pins, capable of sliding in conjugate notches, formed in the base and the cover of the housing.
- the curved shape of the housing notches determines the pivot radius of the handle when it moves between the open and closed positions.
- Such a mechanism is perfectly suitable for a low-caliber single-pole circuit breaker with a non-removable housing, but is not suitable for a multi-pole circuit breaker whose single removable housing contains different compartments juxtaposed for housing the poles.
- the object of the invention is to provide a control mechanism for a multipole circuit breaker, housed in the compact insulating housing having no influence on the movement of the handle and allowing a reduction in the friction of the moving parts of the mobile equipment.
- the support member of the base of the lever comprises a guide ramp secured to each plate of the mechanism, said ramp having a profile, either curvilinear or inclined in the case of a pivoting movement of the lever with pivoting axis fictitious, or rectilinear parallel to the bottom of the case in the case of a sliding movement of the lever.
- rolling members can be interposed between the underside of the base and the plates to minimize the friction forces generated during movement of the lever on the corresponding ramps.
- the ramps can be shaped on the upper edges of the plates, each rolling member being formed by a roller having an axial length slightly greater than the transverse spacing formed between the plates.
- the absence of an additional articulated support part for the lever makes it possible to minimize the friction of the movable members of the mechanism.
- the fictitious axis of rotation of the lever can be located outside the housing, which makes it possible to increase the pivoting radius of the lever. This radius is perfectly defined by the dimensional characteristics of the ramps. It follows that the opposite ends of the base of the lever respectively cover the switching rod and the trip bar when the lever is in the extreme positions of the pivoting stroke. The size of the circuit breaker box is thus reduced to a minimum.
- the pivot pin of the toggle rests on a cam of the release lever. This results in a variation of the opening stroke of the contact arms due to a different rotation of the bar occurring during manual opening or during opening by automatic triggering.
- the stroke of the contact arms is greater in the event of a trip.
- this variation of the opening stroke is used to actuate, by means of the bar, the various electrical auxiliaries arranged on either side of the mechanism.
- a low-voltage three-pole circuit breaker comprises a box 10, parallelepipedal in molded insulating material containing an operating mechanism, designated by the general reference 12.
- the three poles are housed in juxtaposed compartments located in the lower part of the housing 10 and the mechanism 12 is arranged above the central pole in the upper part of the housing 10.
- Each pole includes a pair of separable contacts 14, 16, an arc extinguishing chamber 18 and a thermomagnetic trip device 20.
- the fixed contact 14 is carried by an end conductor 22 extended externally by a first contact pad 24 making projection from the side face 25 of the housing 10.
- the movable contact 16 is arranged at the end of a vertical contact arm 26 secured by a spring 27 to a switching bar 28 common to the three poles.
- the insulating bar 28 for supporting the contact arms 26 is mounted with limited rotation between the open and closed positions of the circuit breaker and extends transversely above the poles in the upper part of the housing 10 in a direction perpendicular to the arms 26 mobile contacts.
- the arc extinguishing chamber 18 is constituted by a stack of metal separators or deionization sheets 30 extending perpendicular to the bottom 32 of the housing 10.
- the second contact pad 34 of each pole leaves the opposite side face 36 of the housing 10, and is electrically connected to the thermomagnetic trip device 20, the latter being arranged between the arc extinguishing chamber 18 and the side face 36.
- the electrical connection of the contact arm 26 with the second contact pad 34 is effected by means of a flexible conductor formed by a braid 38, surrounded by an insulating sheath, not shown.
- the insulation of the braid 38 constitutes a functional insulation of the mechanism 12 with respect to the active parts of each pole.
- the mechanism 12 is mounted above the central pole, between two spaced plates 40, 42 extending parallel in the longitudinal direction of alignment of the contact pads 24, 34.
- the switching bar 28 is actuated by means of a knee lever 44 comprising a lower link 46 and an upper link 48 articulated on a pivot axis 50.
- the knee switch 44 cooperates on the one hand with a lever 52 for manual control projecting from an opening 53 of the cover 54, and d on the other hand with an automatic hook or trigger lever 56 pivotally mounted on a pivot 58.
- the lower link 46 is mechanically coupled to the switching bar 28 and the upper link 48 is articulated on an axis 60 of the trigger lever 56.
- the mechanical connection between the toggle joint 44 and the lever 52 takes place in an elastic manner by means of a tension spring 62, one of the ends of which is anchored to the pivot axis 50 of the knee llère 44 and the other end of which is attached to a lug secured to the lever 52.
- the trigger lever 56 comprises a hooking nose 64 cooperating in the armed position with a lock 66 of a trigger bar 68 made of insulating material, common to the three poles.
- the trigger bar 68 extends above the magnetothermal trigger 20 of each pole in a direction parallel to the switching bar 28, and is mounted with limited rotation between an armed position for locking the hooking nose 64 of the lever 56 by the lock 66 and a triggered position releasing the lever 56 by unlocking the lock 66.
- the passage from the armed position to the triggered position of the rotary bar 68 operates clockwise and is controlled either by the magnetothermal trigger 20 in the presence an overload or short-circuit current, either by an auxiliary trip device, in particular an undervoltage relay so as to cause the automatic triggering of the mechanism 12 and the opening of the contacts 14, 16 of the three poles by rotation of the bar switch 28 counterclockwise.
- the latch 66 of the trigger bar 68 is biased in the armed position by a return spring (not shown).
- the lever 52 is provided with an elongated base 70 located inside the housing 10 between the mechanism 12 and the cover 54.
- the curved underside 72 of the base 70 is supported on a fixed guide member 73 formed by the upper edges of the two plates 40, 42 of the mechanism 12 with the interposition of two rollers 74, 76 (see fig. 4 and 5).
- Each plate 40, 42 is equipped with two curved or inclined ramps 78, 80 on which the rollers 74, 76 roll during the movement of the lever 52.
- the dimensional characteristics of the ramps 78, 80 allow. attempt to determine with precision the radius of the stroke and the pivot point M of the lever 52, the point M being the trace of a fictitious axis of rotation located in FIG.
- the non-material point M of pivoting of the lever 52 may be outside the housing 10, which makes it possible to minimize the height of the housing 10 between the bottom 32 and the cover 54.
- the ramps 78, 80 of the upper edges of the plates 40, 42 are rectilinear, extending parallel to the bottom 32 of the housing.
- the base 70 is also rectilinear and cooperates with the ramps to impose a translation movement limited to the handle 52 during its travel between the open and closed positions.
- the lower link 46 of the toggle joint 44 of the mechanism 12 is formed by a rectangular open loop of steel wire of circular section.
- the ends 88 of the open branch 90 of the loop are engaged in an opening 92 of the switching bar 28.
- the opposite branch 94 of the lower link 46 is positioned in a semi-open notch 96 formed in a U-shaped stirrup 98 constituting the upper link 48.
- the spring 62 for triggering the mechanism 12 is hooked between the branch 94 and the lever 52 and maintains the branch 94 at the bottom of the notch 96, so as to form the pivot axis 50 of the toggle joint 44.
- FIGS 8 and 9 show another embodiment of the toggle 44 in which each link 46, 48 is shaped into a U from a steel wire of circular section.
- One of the 100 lateral branches of the lower link 46 is held by the tension spring 62 in a crescentally deformed part 102 of the upper link 48.
- the pivot axis 50 of the toggle joint 44 moves along a cam 104 of the curved lower edge of the trigger lever 56, said edge being arranged between the pivot 58 and the hooking nose 64 opposite the axis 60 of articulation of the upper link 48.
- the cam 104 of the lever 56 is delimited by two notches 106, 108 serving as stops for the axis 50 of the toggle joint 44 when the contacts 14, 16 of the poles are respectively in the position of closing and opening.
- the trigger lever 56 In the closed position F (FIG. 1), the trigger lever 56 is locked in the armed position by the lock 66, and the axis 50 of the toggle joint 44 is positioned in the first notch 106 of the cam 104.
- the circuit breaker is reset by manual movement of the handle 52 clockwise from the O / D position to the R position of the reset close to the 0 position so as to ensure that the trip lever is hooked 56 to the lock 66.
- the closing of the contacts of the circuit breaker (FIG. 1) then takes place by a reverse rotation of the handle 52 actuated manually towards the position F.
- the control auxiliaries are formed by auxiliary triggers, in particular of the voltmetric type with undervoltage MN and / or with current emission MX intended to cause the unlocking of the lock 66 to trigger the. mechanism 12 following the absence of tension on the network or to a remote control opening the circuit breaker.
- the variation of the opening stroke of the contact arms 26 intervening by a different rotation of the bar 28, according to the type of manual or automatic control on fault, is advantageously used to actuate the various electrical auxiliaries.
- the switching bar 28 for this purpose comprises a projection 110 ( Figures 10 and 11) or boss arranged in the vicinity of each auxiliary.
- the projection 110 of the bar 28 cooperates in the O / D position of the lever 52 with a transmission lever 112 intended to actuate the reversing contact 114 of the second system of contacts SD for remote signaling of a trip on fault. .
- the projection 110 associated with the first auxiliary contact system OF would actuate the corresponding change-over contact 114 if the lever 52 was in the manual opening 0 position.
- the change-over contact 114 of the first OF system is therefore controlled prior to that of the second SD system because of the different opening travel of the bar 28 in the direction of the arrow f.
- an auxiliary release MN or MX comprises an angled control lever 116 pivotally mounted on an axis 118. One end of the control lever 116 cooperates with a protrusion 120 of the trigger bar 68, and the The opposite end is in contact with the lever. transmission 112.
- the control lever 116 pivots clockwise and drives the bar 68 towards the triggered position.
- the lever 52 arrives in the intermediate O / D position, the projection 110 of the bar 28 actuates the levers 112, 116 in the direction of the arrows f to ensure automatic resetting of the auxiliary release MN or MX. This automatic rearming by the bar 28 is impossible in position 0 of the lever 52.
Landscapes
- Breakers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Circuit Breakers (AREA)
- Control Of Eletrric Generators (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Percussive Tools And Related Accessories (AREA)
- Electrophonic Musical Instruments (AREA)
- Electronic Switches (AREA)
- Switches With Compound Operations (AREA)
Abstract
Description
L'invention. est relative à un mécanisme de commande d'un disjoncteur multipolaire à boîtier isolant moulé, selon le préambule de la revendication 1.The invention. relates to a control mechanism of a multipole circuit breaker with molded insulating housing, according to the preamble of
Dans la majorité des disjoncteurs basse tension de l'art antérieur (voir FR-A-2 262 859), la manette est supportée par un berceau ou étrier métallique en forme de U renversé, monté à pivotement sur un axe fixe assujetti aux platines du mécanisme. La trajectoire de la manette présente un petit rayon de pivotement due à la présence de l'axe matériel du berceau à l'intérieur du boîtier. Le barreau de commutation et/ou la barre de déclenchement sont généralement disposés à l'extérieur de la trajectoire de la manette.In the majority of low voltage circuit breakers of the prior art (see FR-A-2 262 859), the handle is supported by a metal cradle or bracket in the shape of an inverted U, pivotally mounted on a fixed axis subject to the plates of the mechanism. The trajectory of the joystick has a small pivot radius due to the presence of the material axis of the cradle inside the housing. The switching bar and / or the trigger bar are generally arranged outside the trajectory of the lever.
Il en résulte une augmentation de l'encombrement du boîtier isolant.This results in an increase in the size of the insulating housing.
La présence de ce berceau articulé augmente d'autre part le frottement de l'équipage mobile nécessitant des efforts importants d'actionnement de la manette.The presence of this articulated cradle also increases the friction of the moving assembly requiring significant efforts to actuate the lever.
Le document US-A-2 806 103 se rapporte à un disjoncteur unipolaire à boîtier isolant moulé, formé par l'assemblage d'une base et d'un couvercle. La manette du mécanisme comporte une embase interne équipée latéralement de deux tenons de guidage, susceptibles de coulisser dans des encoches conjuguées, ménagées dans la base et le couvercle du boîtier. La forme incurvée des encoches du boîtier détermine le rayon de pivotement de la manette lors de son déplacement entre les positions d'ouverture et de fermeture. Un tel mécanisme convient parfaitement pour un disjoncteur unipolaire de bas calibres et à boîtier indémontable, mais n'est pas adapté pour un disjoncteur multipolaire dont le boîtier unique démontable renferme différents compartiments juxtaposés pour le logement des pôles.Document US-A-2 806 103 relates to a single-pole circuit breaker with molded insulating housing, formed by the assembly of a base and a cover. The lever of the mechanism comprises an internal base laterally equipped with two guide pins, capable of sliding in conjugate notches, formed in the base and the cover of the housing. The curved shape of the housing notches determines the pivot radius of the handle when it moves between the open and closed positions. Such a mechanism is perfectly suitable for a low-caliber single-pole circuit breaker with a non-removable housing, but is not suitable for a multi-pole circuit breaker whose single removable housing contains different compartments juxtaposed for housing the poles.
L'objet de l'invention consiste à réaliser un mécanisme de commande d'un disjoncteur multipolaire, logé dans le boîtier isolant compact n'ayant aucune influence sur le déplacement de la manette et autorisant une réduction du frottement des pièces en mouvement de l'équipage mobile.The object of the invention is to provide a control mechanism for a multipole circuit breaker, housed in the compact insulating housing having no influence on the movement of the handle and allowing a reduction in the friction of the moving parts of the mobile equipment.
L'organe de support de l'embase de la manette comporte une rampe de guidage solidarisée à chaque platine du mécanisme, ladite rampe ayant un profil, soit curviligne ou incliné dans le cas d'un mouvement de pivotement de la manette à axe de pivotement fictif, soit rectiligne parallèle au fond du boîtier dans le cas d'un mouvement coulissant de la manette.The support member of the base of the lever comprises a guide ramp secured to each plate of the mechanism, said ramp having a profile, either curvilinear or inclined in the case of a pivoting movement of the lever with pivoting axis fictitious, or rectilinear parallel to the bottom of the case in the case of a sliding movement of the lever.
Dans le mécanisme selon l'invention, des organes de roulement peuvent être interposés entre la face inférieure de l'embase et les platines pour diminuer au minimum les forces de frottement engendrées lors du déplacement de la manette sur les rampes correspondantes. Les rampes peuvent être conformées sur les chants supérieurs des platines, chaque organe de roulement étant formé par un rouleau ayant une longueur axiale légèrement supérieure à l'écartement transversal ménagé entre les platines.In the mechanism according to the invention, rolling members can be interposed between the underside of the base and the plates to minimize the friction forces generated during movement of the lever on the corresponding ramps. The ramps can be shaped on the upper edges of the plates, each rolling member being formed by a roller having an axial length slightly greater than the transverse spacing formed between the plates.
L'absence de pièce additionnelle articulée de support de la manette permet de réduire au minimum le frottement des organes mobiles du mécanisme. L'axe fictif de rotation de la manette peut se trouver à l'extérieur du boîtier, ce qui permet d'augmenter le rayon de pivotement de la manette. Ce rayon est parfaitement défini par les caractéristiques dimensionnelles des rampes. Il en résulte que les extrémités opposées de l'embase de la manette recouvrent respectivement le barreau de commutation et la barre de déclenchement lorsque la manette se trouve dans les positions extrêmes de la course de pivotement. L'encombrement du boîtier du disjoncteur est ainsi réduit au minimum.The absence of an additional articulated support part for the lever makes it possible to minimize the friction of the movable members of the mechanism. The fictitious axis of rotation of the lever can be located outside the housing, which makes it possible to increase the pivoting radius of the lever. This radius is perfectly defined by the dimensional characteristics of the ramps. It follows that the opposite ends of the base of the lever respectively cover the switching rod and the trip bar when the lever is in the extreme positions of the pivoting stroke. The size of the circuit breaker box is thus reduced to a minimum.
L'axe de pivotement de la genouillère prend appui sur une came du levier de déclenchement. Il en résulte une variation de la course d'ouverture des bras de contacts due à une rotation différente du barreau intervenant lors d'une ouverture manuelle ou lors d'une ouverture par déclenchement automatique. La course des bras de contact est plus grande dans le cas d'un déclenchement.The pivot pin of the toggle rests on a cam of the release lever. This results in a variation of the opening stroke of the contact arms due to a different rotation of the bar occurring during manual opening or during opening by automatic triggering. The stroke of the contact arms is greater in the event of a trip.
On utilise avantageusement cette variation de la course d'ouverture pour actionner, par l'intermédiaire du barreau, les différents auxiliaires électriques disposés de part et d'autre du mécanisme.Advantageously, this variation of the opening stroke is used to actuate, by means of the bar, the various electrical auxiliaries arranged on either side of the mechanism.
D'autres avantages et caractéristiques ressortiront plus clairement de l'exposé qui va suivre de différents modes de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés aux dessins annexés dans lesquels :
- la figure 1 est une vue schématique en coupe d'un disjoncteur équipé d'un mécanisme selon l'invention, l'ensemble étant représenté en position F de fermeture ;
- les figures 2 et 3 sont des vues analogues à celles de la figure 1, respectivement en position O d'ouverture manuelle et en position O/D d'ouverture par déclenchement automatique sur défaut ;
- la figure 4 est une coupe partielle du mécanisme selon la ligne IV-IV de la figure 3 ;
- la figure 5 montre une vue simplifiée à échelle agrandie de la figure 1, seules la manette et les platines du mécanisme étant représentées ;
- la figure 6 est une vue en coupe de la genouillère accouplée au barreau ;
- la figure 7 est une vue en perspective de la genouillère selon la figure 6 ;
- la figure 8 représente une variante de réalisation de la genouillère, montrée en position désaccouplée ;
- la figure 9 est une coupe selon la ligne IX-IX de la figure 8, en position montée de la genouillère ;
- la figure 10 montre une vue partielle éclatée de la figure 3, représentant un système de contacts auxiliaires SD de signalisation à distance d'un défaut ;
- la figure 11 est une vue analogue à celle de la figure 10, représentant un déclencheur auxiliaire MN ou MX du mécanisme ;
- la figure 12 est une vue schématique en plan du disjoncteur selon la fig. 10 ou 11, le couvercle étant enlevé.
- Figure 1 is a schematic sectional view of a circuit breaker equipped with a mechanism according to the invention, the assembly being shown in the closed position F;
- Figures 2 and 3 are views similar to those of Figure 1, respectively in position O manual opening and in position O / D opening by automatic triggering on fault;
- Figure 4 is a partial section of the mechanism according to line IV-IV of Figure 3;
- Figure 5 shows a simplified view on an enlarged scale of Figure 1, only the lever and the plates of the mechanism being shown;
- Figure 6 is a sectional view of the toggle coupled to the bar;
- Figure 7 is a perspective view of the toggle joint according to Figure 6;
- FIG. 8 represents an alternative embodiment of the toggle joint, shown in the uncoupled position;
- Figure 9 is a section along line IX-IX of Figure 8, in the mounted position of the toggle;
- FIG. 10 shows a partial exploded view of FIG. 3, showing a system of auxiliary contacts SD for remote signaling of a fault;
- Figure 11 is a view similar to that of Figure 10, showing an auxiliary trigger MN or MX of the mechanism;
- FIG. 12 is a schematic plan view of the circuit breaker according to FIG. 10 or 11, the cover being removed.
Sur les figures 1 à 3, un disjoncteur tripolaire basse tension comporte un boîtier 10, parallélépipédique en matériau isolant moulé renfermant un mécanisme de manoeuvre, désigné par le repère général 12. Les trois pôles sont logés dans des compartiments juxtaposés situés dans la partie inférieure du boîtier 10 et le mécanisme 12 est disposé au-dessus du pôle central dans la partie supérieure du boîtier 10.In FIGS. 1 to 3, a low-voltage three-pole circuit breaker comprises a
Chaque pôle comporte une paire de contacts 14, 16 séparables, une chambre d'extinction d'arc 18 et un déclencheur magnétothermique 20. Le contact fixe 14 est porté par un conducteur 22 d'extrémité prolongé extérieurement par une première plage de contact 24 faisant saillie de la face latérale 25 du boîtier 10. Le contact mobile 16 est agencé à l'extrémité d'un bras de contact 26 vertical solidarisé par un ressort 27 à un barreau 28 de commutation commun aux trois pôles. Le barreau 28 isolant de support des bras de contact 26 est monté à rotation limitée entre les positions d'ouverture et de fermeture du disjoncteur et s'étend transversalement au-dessus des pôles dans la partie supérieure du boîtier 10 selon une direction perpendiculaire aux bras de contact 26 mobiles. La chambre d'extinction d'arc 18 est constituée par un empilage de séparateurs métalliques ou tôles de désionisation 30 s'étendant perpendiculairement au fond 32 du boîtier 10.Each pole includes a pair of
La deuxième plage de contact 34 de chaque pôle sort de la face latérale 36 opposée du boîtier 10, et est connectée électriquement au déclencheur magnétothermique 20, ce dernier étant agencé entre la chambre d'extinction d'arc 18 et la face latérale 36. La liaison électrique du bras de contact 26 avec la deuxième plage de contact 34 s'effectue au moyen d'un conducteur souple formé par une tresse 38, entourée par une gaine isolante non représentée.The
L'isolation de la tresse 38 constitue une isolation fonctionnelle du mécanisme 12 par rapport aux parties actives de chaque pôle.The insulation of the
Le mécanisme 12 est monté au-dessus du pôle central, entre deux platines 40, 42 espacées s'étendant parallèlement dans la direction longitudinale d'alignement des plages de contact 24, 34. Le barreau de commutation 28 est actionné par l'intermédiaire d'une genouillère 44 comprenant une biellette inférieure 46 et une biellette supérieure 48 articulées sur un axe de pivotement 50. La genouillère 44 coopère d'une part avec une manette 52 de commande manuelle faisant saillie d'une ouverture 53 du couvercle 54, et d'autre part avec un crochet ou levier de déclenchement 56 automatique monté à pivotement sur un pivot 58. La biellette inférieure 46 est accouplée mécaniquement au barreau de commutation 28 et la biellette supérieure 48 est articulée sur un axe 60 du levier de déclenchement 56. La liaison mécanique entre la genouillère 44 et la manette 52 s'effectue de manière élastique au moyen d'un ressort de traction 62 dont l'une des extrémités est ancrée à l'axe de pivotement 50 de la genouillère 44 et dont l'autre extrémité est accrochée à une patte solidaire de la manette 52.The
A l'opposé du pivot 58, le levier de déclenchement 56 comporte un nez d'accrochage 64 coopérant en position armée avec un verrou 66 d'une barre de déclenchement 68 en matériau isolant, commune aux trois pôles. La barre de déclenchement 68 s'étend au-dessus du déclencheur magnétothermique 20 de chaque pôle selon une direction parallèle au barreau de commutation 28, et est montée à rotation limitée entre une position armée de verrouillage du nez d'accrochage 64 du levier 56 par le verrou 66 et une position déclenchée libérant le levier 56 par déverrouillage du verrou 66. Le passage de la position armée à la position déclenchée de la barre 68 rotative s'opère dans le sens horaire et est piloté soit par le déclencheur magnétothermique 20 en présence d'un courant de surcharge ou de court-circuit, soit par un déclencheur auxiliaire notamment un relais à manque de tension de manière à provoquer le déclenchement automatique du mécanisme 12 et l'ouverture des contacts 14, 16 des trois pôles par rotation du barreau de commutation 28 dans le sens inverse des aiguilles d'une montre. Le verrou 66 de la barre de déclenchement 68 est sollicité en position armée par un ressort de rappel (non représenté).Opposite the
La manette 52 est dotée d'une embase 70 allongée située à l'intérieur du boîtier 10 entre le mécanisme 12 et le couvercle 54. La face inférieure 72 incurvée de l'embase 70 prend appui sur un organe fixe de guidage 73 formé par les chants supérieurs des deux platines 40, 42 du mécanisme 12 avec interposition de deux rouleaux 74, 76 (voir fig. 4 et 5). Chaque platine 40, 42 est équipée de deux rampes 78, 80 curvilignes ou inclinées sur lesquelles roulent les rouleaux 74, 76 au cours du déplacement de la manette 52. Les caractéristiques dimensionnelles des rampes 78, 80 permet. tent de déterminer avec précision le rayon de la course et le point M de pivotement de la manette 52, le point M étant la trace d'un axe de rotation fictif situé sur la figure 5 au voisinage du fond 32 du boîtier 10, à l'intersection de deux rayons XX', YY' passant par un point des rampes 78, 80. La position du point M de pivotement de la manette 52 dépend du rayon de courbure des rampes 78, 80, et des butées de fin de course 82, 84 délimitent chaque rampe 78, 80 pour contrôler les positions extrêmes de la course de pivotement de la manette 52. La présence des rouleaux 74, 76 diminue les forces de frottement engendrées lors du déplacement de la manette 52, chaque rouleau 74, 76 ayant une longueur axiale légèrement supérieure à l'écartement d transversal ménagé entre les platines 40, 42 (figure 4).The
Le point M, non matériel, de pivotement de la manette 52 peut se trouver à l'extérieur du boîtier 10, ce qui permet de réduire au minimum la hauteur du boîtier 10 entre le fond 32 et le couvercle 54.The non-material point M of pivoting of the
Selon une variante, les rampes 78, 80 des chants supérieurs des platines 40, 42 sont rectilignes en s'étendant parallèlement au fond 32 du boîtier. L'embase 70 est également rectiligne et coopère avec les rampes pour imposer un mouvement de translation limitée à la manette 52 lors de sa course entre les positions d'ouverture et de fermeture.According to a variant, the
Sur les figures 6 et 7, la biellette inférieure 46 de la genouillère 44 du mécanisme 12 est formée par une boucle ouverte rectangulaire en fil d'acier de section circulaire. Les extrémités 88 de la branche 90 ouverte de la boucle sont engagées dans une ouverture 92 du barreau de commutation 28. La branche 94 opposée de la biellette inférieure 46 est positionnée dans une encoche 96 semi- ouverte ménagée dans un étrier 98 en U constituant la biellette supérieure 48. Le ressort 62 de déclenchement du mécanisme 12 est accroché entre la branche 94 et la manette 52 et maintient la branche 94 au fond de l'encoche 96, de manière à former l'axe de pivotement 50 de la genouillère 44.In FIGS. 6 and 7, the
Les figures 8 et 9 montrent une autre réalisation de la genouillère 44 dans laquelle chaque biellette 46, 48 est conformée en U à partir d'un fil d'acier de section circulaire. L'une des 100 branches latérales de la biellette inférieure 46 est maintenue par le ressort de traction 62 dans une partie déformée en croissant 102 de la biellette supérieure 48.Figures 8 and 9 show another embodiment of the
On remarque, sur les figures 1 à 4, que les extrémités opposées de l'embase 70 recouvrent respectivement le barreau de commutation 28 et la barre de déclenchement 68 lorsque la manette 52 se trouve dans les positions extrêmes de la course de pivotement. Il en résulte un gain d'encombrement du boîtier 10 dans la direction longitudinale des pôles.It is noted, in Figures 1 to 4, that the opposite ends of the base 70 respectively cover the switching
L'axe de pivotement 50 de la genouillère 44 se déplace le long d'une came 104 du chant inférieur incurvé du levier de déclenchement 56, ledit chant étant agencé entre le pivot 58 et le nez d'accrochage 64 à l'opposé de l'axe 60 d'articulation de la biellette supérieure 48. La came 104 du levier 56 est délimitée par deux encoches 106,108 servant de butées à l'axe 50 de la genouillère 44 lorsque les contacts 14, 16 des pôles se trouvent respectivement en position de fermeture et d'ouverture.The
Le fonctionnement du mécanisme 12 selon les figures 1 à 5 est le suivant :The operation of the
La figure 5 indique schématiquement les différentes positions occupées par la manette 52 pivotante lors d'une commande manuelle ou d'un déclenchement automatique sur défaut du mécanisme 12 :
- position F de fermeture des contacts du disjoncteur,
- position O/D d'ouverture des contacts suite à un déclenchement automatique sur défaut,
- position P m 0 non stable correspondant au point mort d'ouverture du mécanisme 12,
- position O d'ouverture manuelle des contacts,
- position R de réarmement du mécanisme 12.
- position F for closing the circuit breaker contacts,
- O / D position for opening the contacts following an automatic trip on fault,
- non-stable position P m 0 corresponding to the opening neutral position of the
mechanism 12, - position O of manual opening of the contacts,
- reset position R of the
mechanism 12.
En position F de fermeture (figure 1), le levier de déclenchement 56 est verrouillé en position armée par le verrou 66, et l'axe 50 de la genouillère 44 est positionné dans la première encoche 106 de la came 104.In the closed position F (FIG. 1), the
Lors de l'ouverture manuelle du disjoncteur (figure 2), intervenant par actionnement de la manette 52 depuis la position F jusqu'à la position 0, le levier de déclenchement 56 reste immobile en position armée, et l'axe 50 de la genouillère se déplace le long de la came 104 jusqu'à sa venue en butée avec la deuxième encoche 108. Le blocage de la genouillère 44 par le levier de déclenchement 56 empêche la rotation poursuivie du barreau 28 et des bras de contact 26 dans le sens inverse des aiguilles d'une montre.During the manual opening of the circuit breaker (Figure 2), intervening by actuation of the
A la suite d'un déclenchement sur défaut, le déverrouillage du verrou 66 par la barre de déclenchement 68 libère le nez d'accrochage 64 du levier de déclenchement 56 entraînant le pivotement dans le sens inverse d'une montre du levier 56 autour du pivot 58. La manette 52 est entraînée par la genouillère 44 de la position F vers la position O/D intermédiaire. L'axe 50 de la genouillère 44 est engagé dans la deuxième encoche 108 de la came 104, et la genouillère 44 suit le mouvement du levier de déclenchement 56 (figure 3) vers la position désarmée. Il en résulte que la course d'ouverture des bras de contact 26 à la suite d'un déclenchement est plus grande que celle intervenant lors d'une ouverture manuelle. Cette augmentation de la course du barreau 28 et des bras de contact 26 (figure 3) en cas de déclenchement sur défaut permet d'améliorer le pouvoir de coupure du disjoncteur.Following a trip on fault, unlocking the
Le réarmement du disjoncteur s'effectue par un déplacement manuel de la manette 52 dans le sens horaire depuis la position O/D jusqu'à la position R du réarmement voisine de la position 0 de manière à assurer l'accrochage du levier de déclenchement 56 au verrou 66. La fermeture des contacts du disjoncteur (figure 1) s'opère ensuite par une rotation inverse de la manette 52 actionnée manuellement vers la position F.The circuit breaker is reset by manual movement of the
Des auxiliaires électriques de commande et de signalisation sont disposés de part et d'autre du mécanisme 12 dans la partie supérieure du boîtier 10. Les auxiliaires de signalisation ont pour mission d'indiquer à distance l'état du disjoncteur et comportent :
- un premier système de contacts inverseurs OF de signalisation à distance des positions F de fermeture et 0 d'ouverture manuelle du disjoncteur ;
- un deuxième système de contacts auxiliaires SD de signalisation d'un défaut suite à un déclenchement automatique du mécanisme 12.
- a first system of reversing contacts OF for remote signaling of the closing F and manual opening 0 positions of the circuit breaker;
- a second system of auxiliary contacts SD for signaling a fault following an automatic triggering of the
mechanism 12.
Les auxiliaires de commande sont formés par des déclencheurs auxiliaires, notamment du type voltmétrique à minimum de tension MN et/ou à émission de courant MX destinés à provoquer le déverrouillage du verrou 66 pour déclencher le . mécanisme 12 suite à l'absence de tension sur le réseau ou à une télécommande d'ouverture du disjoncteur. La variation de la course d'ouverture des bras de contact 26 intervenant par une rotation différente du barreau 28, selon le type de commande manuelle ou automatique sur défaut, est utilisée avantageusement pour actionner les différents auxiliaires électriques. Le barreau de commutation 28 comprend à cet effet une saillie 110 (figures 10 et 11) ou bossage disposé au voisinage de chaque auxiliaire.The control auxiliaries are formed by auxiliary triggers, in particular of the voltmetric type with undervoltage MN and / or with current emission MX intended to cause the unlocking of the
Sur la figure 10, la saillie 110 du barreau 28 coopère en position O/D de la manette 52 avec un levier de transmission 112 destiné à actionner le contact inverseur 114 du deuxième système de contacts SD de signalisation à distance d'un déclenchement sur défaut.In FIG. 10, the
D'une manière similaire, la saillie 110 associée au premier système de contacts auxiliaires OF (non représenté) actionnerait le contact inverseur 114 correspondant si la manette 52 se trouvait dans la position 0 d'ouverture manuelle. Le contact inverseur 114 du premier système OF est donc commandé préalablement à celui du deuxième système SD à cause de la course d'ouverture différente du barreau 28 dans le sens de la flèche f.Similarly, the
Sur la figure 11, un déclencheur auxiliaire MN ou MX comporte un levier de commande 116 coudé monté à pivotement sur un axe 118. L'une des extrémités du levier de commande 116 coopère avec une protubérance 120 de la barre de déclenchement 68, et l'extrémité opposée est en contact avec le levier de. transmission 112.In FIG. 11, an auxiliary release MN or MX comprises an
Lors d'un déclenchement du mécanisme 12, provoqué par le déclencheur auxiliaire MN ou MX, le levier de commande 116 pivote dans le sens horaire et entraîne la barre 68 vers la position déclenchée. Lorsque la manette 52 arrive en position intermédiaire O/D, la saillie 110 du barreau 28 actionne les leviers 112, 116 dans le sens des flèches f pour assurer le réarmement automatique du déclencheur auxiliaire MN ou MX. Ce réarmement automatique par le barreau 28 est impossible en position 0 de la manette 52.When the
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84401961T ATE29620T1 (en) | 1983-10-21 | 1984-10-01 | OPERATING MECHANISM FOR A MULTI-POLE LOW-VOLTAGE CIRCUIT BREAKER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8317017 | 1983-10-21 | ||
FR8317017A FR2553929B1 (en) | 1983-10-21 | 1983-10-21 | CONTROL MECHANISM OF A LOW VOLTAGE MULTIPOLAR CIRCUIT BREAKER |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0140761A2 EP0140761A2 (en) | 1985-05-08 |
EP0140761A3 EP0140761A3 (en) | 1985-06-19 |
EP0140761B1 true EP0140761B1 (en) | 1987-09-09 |
Family
ID=9293514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84401961A Expired EP0140761B1 (en) | 1983-10-21 | 1984-10-01 | Operating mechanism for a low-voltage multi-pole circuit breaker |
Country Status (10)
Country | Link |
---|---|
US (1) | US4622529A (en) |
EP (1) | EP0140761B1 (en) |
JP (1) | JP2540483B2 (en) |
AT (1) | ATE29620T1 (en) |
AU (1) | AU571018B2 (en) |
CA (1) | CA1253548A (en) |
DE (1) | DE3466125D1 (en) |
ES (1) | ES8506177A1 (en) |
FR (1) | FR2553929B1 (en) |
ZA (1) | ZA847863B (en) |
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-
1983
- 1983-10-21 FR FR8317017A patent/FR2553929B1/en not_active Expired
-
1984
- 1984-10-01 AT AT84401961T patent/ATE29620T1/en not_active IP Right Cessation
- 1984-10-01 DE DE8484401961T patent/DE3466125D1/en not_active Expired
- 1984-10-01 EP EP84401961A patent/EP0140761B1/en not_active Expired
- 1984-10-03 US US06/657,197 patent/US4622529A/en not_active Expired - Fee Related
- 1984-10-08 ZA ZA847863A patent/ZA847863B/en unknown
- 1984-10-09 CA CA000464959A patent/CA1253548A/en not_active Expired
- 1984-10-19 JP JP59220338A patent/JP2540483B2/en not_active Expired - Lifetime
- 1984-10-19 ES ES536906A patent/ES8506177A1/en not_active Expired
- 1984-10-19 AU AU34524/84A patent/AU571018B2/en not_active Ceased
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Also Published As
Publication number | Publication date |
---|---|
CA1253548A (en) | 1989-05-02 |
FR2553929A1 (en) | 1985-04-26 |
EP0140761A3 (en) | 1985-06-19 |
ES536906A0 (en) | 1985-06-16 |
JPS60167227A (en) | 1985-08-30 |
US4622529A (en) | 1986-11-11 |
EP0140761A2 (en) | 1985-05-08 |
FR2553929B1 (en) | 1986-08-01 |
AU3452484A (en) | 1985-04-26 |
DE3466125D1 (en) | 1987-10-15 |
ATE29620T1 (en) | 1987-09-15 |
ZA847863B (en) | 1985-05-29 |
AU571018B2 (en) | 1988-03-31 |
JP2540483B2 (en) | 1996-10-02 |
ES8506177A1 (en) | 1985-06-16 |
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