EP0322321B1 - High caliber multipole breaker with mould case - Google Patents
High caliber multipole breaker with mould case Download PDFInfo
- Publication number
- EP0322321B1 EP0322321B1 EP88420404A EP88420404A EP0322321B1 EP 0322321 B1 EP0322321 B1 EP 0322321B1 EP 88420404 A EP88420404 A EP 88420404A EP 88420404 A EP88420404 A EP 88420404A EP 0322321 B1 EP0322321 B1 EP 0322321B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- poles
- circuit breaker
- pole
- twinned
- rating
- 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
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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
- H01H71/08—Terminals; Connections
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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
- H01H71/1045—Multiple circuits-breaker, e.g. for the purpose of dividing current or potential drop
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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
- H01H71/1009—Interconnected mechanisms
- H01H2071/1036—Interconnected mechanisms having provisions for four or more poles
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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
- H01H71/02—Housings; Casings; Bases; Mountings
Definitions
- the invention relates to a low voltage multipolar circuit breaker, for high currents, comprising a plurality of poles juxtaposed inside an insulating molded case, each pole comprising a pair of separable contacts, an arc extinguishing chamber, a pair of contact pads connected to the separable contacts and projecting towards the outside of the housing, and a current transformer arranged around one of the contact pads and the output of which is connected to a trigger common to the different poles, the pads contacts being connected to terminal blocks intended to be connected respectively to the phases of a network to be protected.
- the size of a circuit breaker of this type is, for a housing of predetermined size, determined by the choice of poles, that is to say essentially by the dimensions of the copperware associated with the pole.
- the subject of the invention is the extension of a range of circuit breakers comprising a certain number of standard poles, so as to form, in a standard molded case, a circuit breaker of greater caliber than that of the individual standard poles which compose it, this goal to be achieved with a minimum number of modifications.
- the document EP-A-117.094 describes a single-pole circuit breaker constituted by the parallel connection of elementary single-pole electromagnetic circuit breakers.
- connection bars intended to be connected to one of the phases of the network
- connection bars is connected to at least two adjacent twin poles, electrically arranged in parallel, at least one of the connection bars associated with another pole of the circuit breaker having a width such that it laterally protrudes from said pole and partially overlaps the immediately adjacent pole, so that the circuit breaker can be used for a rating greater than that of the individual standard poles that compose it.
- connection bars projecting laterally from the associated pole have a flared shape, their smallest face being in contact with the rear face of the associated contact pad and the connection bar associated with the twin poles only covers 'A part of the associated contact pads, an isolation screen being arranged on the free part of the contact pads of the twin poles so as to ensure isolation between said pads and the adjacent connection bars.
- the width of the fixed pads and connection clamps is substantially equal to that of the corresponding bar, so as to form connection zones, at least one of which is wider than the associated pole and at least one of which, associated with the twin poles, has a width less than the previous one .
- a low-voltage multipolar circuit breaker in known type, comprises a plurality of juxtaposed poles disposed inside a molded case made of insulating material.
- the parallelepiped housing consists of an intermediate housing 10 (FIG. 2), a cover 12 and a rear housing 14.
- the front face 16 of the intermediate housing 10 divides the housing into an anterior compartment 18, delimited by this face and by the cover 12, and in a rear compartment 20 intended for housing the poles and electrically isolated from the front compartment.
- the front compartment 18 contains a control mechanism (not shown) acting on a transverse switching bar 22, common to all the poles.
- a lever 24 for arming the control mechanism, an electronic trip device (not shown) causing an automatic trip upon the occurrence of a fault current, and electrical measurement, signaling and control auxiliaries (not shown) are also housed in the front compartment 18.
- the rear compartment 20 is subdivided longitudinally into elementary pole accommodation compartments by insulating walls 26 for separating the poles.
- Each pole of the rear compartment has a pair of separable contacts 28,30 and a removable arc extinguishing chamber 32.
- the fixed contact 28 is carried directly by a first contact pad 34 projecting slightly outward from the rear face of the rear housing 14.
- the movable contact 30 is connected by a flexible conductor 36 (braid) to a second contact pad 38, also projecting outwards from the rear face of the rear housing 14.
- a current transformer 40 is arranged around one of the contact pads, so as to provide the trigger with a current measurement passing through the corresponding pole.
- Such a circuit breaker is preferably designed so as to be withdrawable, that is to say intended to be plugged into a fixed frame 42 ( Figure 4) carrying, on its rear face, two superimposed rows of fixed connection pads 44 intended to be connected respectively to the two superimposed rows of contact pads 34, 38 by means of connection clamps 46 each constituted by a plurality of fingers 48 of juxtaposed elementary contacts.
- French patents 2583217 and 2594265 respectively describe particular embodiments of connection clamps and of a racking-in and racking-out mechanism of a withdrawable circuit breaker of this type.
- a range of known circuit breakers of this type includes two standard models of molded boxes, three-pole and four-pole, the size of which, from 800A to 3200A, is determined by the choice of poles housed in the elementary compartments, i.e. essentially by the dimensions of the contact pads 34, 38 secured to the housing, the clamps 46 and the pads 44 of connection secured to the chassis in the case of a withdrawable circuit breaker.
- the current transformers 40 also have a rating adapted to the rating of the circuit breaker.
- circuit breakers it is possible to use the standard elements of known circuit breakers to form, in a molded case of standard dimension, a circuit breaker of greater caliber than that of the individual poles which compose it.
- FIGS. 4 and 5 illustrate, respectively in top view and in partial rear view, a three-pole circuit breaker of 4000A caliber constituted by a standard four-pole molded case in which four individual standard poles A, B are mounted. , C and D with a rating of 3200A.
- the circuit breaker is shown in the plugged-in position in a chassis 42.
- the two adjacent central poles B and C are paired, that is to say electrically parallel, to form one of the poles of the three-pole circuit breaker of higher rating, the two side poles A and D constituting the other two poles of the circuit breaker respectively. tripolar.
- connection bars 50 intended to be plugged into the connection clamps 46, themselves connected to the fixed connection pads 44, during racking-in of the circuit breaker in its chassis 42.
- connection strip 50 is fixed to each contact pad 34, 38 of a lateral pole.
- Each contact pad has tapped holes, only the axes of which are shown in FIG. 4, opening out on its rear face and coming opposite orifices 52 passing through the associated bar so as to allow the bar to be fixed on the bar. contact by means of screws 54.
- connection bars 50 associated with the side poles A and D have a flared shape from front to rear, so that their front face, in contact with the corresponding contact pad 34, 38 having the same width that this range, the entire bar has a width greater than this, the rear part of the bar projecting laterally from the pole, A or D, corresponding in the direction of the pole, B or C, adjacent.
- the central connection bar 50 is common to the twin central poles B and C and therefore fixed to the contact pads 34 of these two poles. This central bar is narrower than the previous ones and can be parallelepipedal as shown in the figures. It only covers part of the associated contact areas.
- the space is thus divided into three connection zones, the two lateral connection zones having a width greater than that of the pole, A or D, associated, the central connection zone having a width less than the sum of the widths of the two twin poles, B and C, associated, and preferably less than the width of the lateral connection zones.
- a lateral connection zone partially overlaps the adjacent central pole.
- An insulation screen 56 made of plastic, covers the parts of the contact pads of the twin poles, B and C, which are not in contact with the associated bar 50, so as to insulate between the exposed parts of the contact pads and the connection bars 50 of the adjacent poles which come into the zone arranged opposite the central poles B and C.
- the isolation screen 56 comprises an orifice 58 for the introduction of the connection strip 50, a part central unit 60, the rear face of which is arranged substantially in the plane of the front face of the rest of the isolation screen 56, serving to hold the screen when the connection strip is fixed on the contact pads of the twin poles .
- this central part 60 is then held in place, towards the front by the rear face of the rear housing 14, towards the rear by the central part of the bar 50 which is not in contact with the contact pads, and laterally by the side walls, arranged face to face, of the contact pads of the twin poles.
- connection clamp 46 and the connection pad 44 associated with a connection strip 50 have a width corresponding to the largest width of the latter.
- the clamps and the connection pads are wider than the associated pole, A or D, and protrude laterally in the direction of the adjacent central pole, B or C.
- the chassis 42 has insulating walls 62, perpendicular to its rear face, laterally delimiting the connection zones when the circuit breaker is in the plugged-in position, and defining a minimum isolation distance between phases.
- the central connection clamp 46 associated with the twin poles is a standard clamp, comprising 56 contact fingers 48, suitable for a rating of 3200A, while the lateral connection clamps each have 96 contact fingers.
- one of the elements is oversized.
- the contact pads constituted by the paralleling of two contact pads are oversized, while for the other two phases, it is the elements for connecting the contact pads to the phases that are oversized.
- the current transformers 40 are also adapted to the rating of the circuit breaker.
- the current transformers of the side poles A and D are each provided for a nominal current of 4000A.
- each of the current transformers 40 of the twin poles, B and C is provided for a nominal current corresponding to half the size of the circuit breaker, i.e. 2000A, a transformer-summator 64 (FIG. 8) receiving the output signals from the two transformers and supplying the trigger the sum of these signals.
- a transformer-reducer is interposed between each of the current transformers and the trip device, the transformer-summator 64 also serving as a reducer for the two current transformers of the twin poles. While the output signals of the current transformers are of the order of 1A, the output signals of the transformer-reducers applied to the trip unit are of the order of 100mA.
- the transformer-reducers and the transformer-summator-reducer are preferably arranged in the front compartment 18, in cells 66 provided in the front face 16 of the intermediate housing 10 ( Figures 1 and 2).
- the present invention is not limited to the use of a four-pole case to form a three-pole circuit breaker of higher rating.
- FIG. 6 represents a four-pole circuit breaker formed from two adjoining three-pole boxes.
- the axis of the poles (not shown) is extended so as to be common to all the poles and the release (not shown) is common to the two housings.
- a particular embodiment of a box formed by the joining of two boxes is described in French patent application No. 8717447, filed on 10.12.1987.
- the circuit breaker shown in Figure 6 is made from 6 elementary compartments E, F, G, H, I and J.
- the three network phases are respectively associated with a first pole lateral, E, with enlarged connection bar 50, with two twin poles F and G, and at a second pole H, with enlarged connection bar.
- the neutral As for the neutral, it is associated with the other lateral pole J and separated from the other poles by an unused elementary compartment I.
- Each of the poles E, F, G, H and J being provided for a rating of 3200A, it is thus possible build a 4000A four-pole circuit breaker. Since the current normally flowing through the neutral is lower than that flowing through the other phases of the network, there is no need to provide an extended connection area for the neutral. On the other hand, for reasons of insulation, it is preferable to separate the pole associated with the neutral from the other poles and to insert the unused elementary compartment I between them.
- a three-pole circuit breaker of caliber 8000A (not shown).
- two adjacent lateral poles K and L are twinned and include an enlarged connection strip, that is to say one whose width is greater than the width of the two twinned poles. It is the same for the two adjacent opposite side poles Q and R.
- Three of the central poles, for example M, N and O are connected in parallel, the compartment elementary P remaining unused. The size of this circuit breaker is then greater than the size of 2 standard poles placed in parallel.
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Description
L'invention concerne un disjoncteur multipolaire basse tension, pour fortes intensités, comportant une pluralité de pôles juxtaposés à l'intérieur d'un boîtier moulé isolant, chaque pôle comportant une paire de contacts séparables, une chambre d'extinction d'arc, une paire de plages de contact connectées aux contacts séparables et faisant saillie vers l'extérieur du boîtier, et un transformateur de courant disposé autour de l'une des plages de contact et dont la sortie est connectée à un déclencheur commun aux différents pôles, les plages de contact étant connectées à des barrettes de raccordement destinées à être raccordées respectivement aux phases d'un réseau à protéger.The invention relates to a low voltage multipolar circuit breaker, for high currents, comprising a plurality of poles juxtaposed inside an insulating molded case, each pole comprising a pair of separable contacts, an arc extinguishing chamber, a pair of contact pads connected to the separable contacts and projecting towards the outside of the housing, and a current transformer arranged around one of the contact pads and the output of which is connected to a trigger common to the different poles, the pads contacts being connected to terminal blocks intended to be connected respectively to the phases of a network to be protected.
Le calibre d'un disjoncteur de ce type est, pour un boîtier de dimension prédéterminée, déterminé par le choix des pôles, c'est à dire essentiellement par les dimensions de la cuivrerie associée au pôle.The size of a circuit breaker of this type is, for a housing of predetermined size, determined by the choice of poles, that is to say essentially by the dimensions of the copperware associated with the pole.
L'invention a pour objet l'élargissement d'une gamme de disjoncteurs comportant un certain nombre de pôles standards, de manière à former, dans un boîtier moulé standard, un disjoncteur de calibre supérieur à celui des pôles standards individuels qui le composent, ce but devant être atteint avec un nombre minimal de modifications.The subject of the invention is the extension of a range of circuit breakers comprising a certain number of standard poles, so as to form, in a standard molded case, a circuit breaker of greater caliber than that of the individual standard poles which compose it, this goal to be achieved with a minimum number of modifications.
Le document EP-A-117.094 décrit un disjoncteur unipolaire constitué par la mise en parallèle de disjoncteurs électromagnétiques unipolaires élémentaires.The document EP-A-117.094 describes a single-pole circuit breaker constituted by the parallel connection of elementary single-pole electromagnetic circuit breakers.
Le disjoncteur selon l'invention est caractérisé en ce qu'au moins une des barrettes de raccordement, destinée à être connectée à une des phases du réseau, est connectée à au moins deux pôles jumelés adjacents, disposés électriquement en parallèle, au moins une des barrettes de raccordement associée à un autre pôle du disjoncteur ayant une largeur telle qu'elle dépasse latéralement dudit pôle et chevauche partiellement le pôle immédiatement adjacent, de manière à ce que le disjoncteur puisse être utilisé pour un calibre supérieur à celui des pôles standards individuels qui le composent.The circuit breaker according to the invention is characterized in that at least one of the connection bars, intended to be connected to one of the phases of the network, is connected to at least two adjacent twin poles, electrically arranged in parallel, at least one of the connection bars associated with another pole of the circuit breaker having a width such that it laterally protrudes from said pole and partially overlaps the immediately adjacent pole, so that the circuit breaker can be used for a rating greater than that of the individual standard poles that compose it.
Selon un mode de réalisation préféré, les barrettes de raccordement dépassant latéralement du pôle associé ont une forme évasée, leur plus petite face étant en contact avec la face arrière de la plage de contact associée et la barrette de raccordement associée aux pôles jumelés ne recouvre qu'une partie des plages de contact associée, un écran d'isolement étant disposé sur la partie libre des plages de contact des pôles jumelés de manière à assurer l'isolement entre lesdites plages et les barrettes de raccordement adjacentes.According to a preferred embodiment, the connection bars projecting laterally from the associated pole have a flared shape, their smallest face being in contact with the rear face of the associated contact pad and the connection bar associated with the twin poles only covers 'A part of the associated contact pads, an isolation screen being arranged on the free part of the contact pads of the twin poles so as to ensure isolation between said pads and the adjacent connection bars.
Dans le cas ou le disjoncteur est du type embrochable dans un châssis fixe portant des plages fixes de raccordement destinées à être connectées par l'intermédiaire de pinces de raccordement aux barrettes de raccordement du disjoncteur, la largeur des plages fixes et des pinces de raccordement est sensiblement égale à celle de la barrette correspondante, de manière à former des zones de raccordement dont l'une au moins est plus large que le pôle associé et dont l'une au moins, associée aux pôles jumelés, a une largeur inférieure à la précédente.In the case where the circuit breaker is of the plug-in type in a fixed frame carrying fixed connection pads intended to be connected by means of connection clamps to the circuit breaker connection strips, the width of the fixed pads and connection clamps is substantially equal to that of the corresponding bar, so as to form connection zones, at least one of which is wider than the associated pole and at least one of which, associated with the twin poles, has a width less than the previous one .
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de différents modes de réalisation de l'invention, donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, sur lesquels:
- la figure 1 est une vue éclatée, en perspective, d'un disjoncteur multipolaire, de type connu;
- la figure 2 est une vue en perspective du boîtier intermédiaire du disjoncteur selon la figure 1;
- la figure 3 est une vue en coupe longitudinale d'un pôle du disjoncteur selon la figure 1, représenté en position d'ouverture des contacts;
- la figure 4 est une vue de dessus schématique partielle, représentant les éléments de raccordement entre les plages de contact faisant saillie de la face arrière d'un disjoncteur à pôles jumelés selon l'invention et des plages fixes de raccordement solidaires d'un châssis, en coupe, dans lequel vient s'embrocher le disjoncteur;
- les figures 5 et 6 représentent en vue arrière,en perspective, la partie supérieure de deux modes de réalisation d'un disjoncteur à pôles jumelés selon l'invention;
- la figure 7 représente en perspective, un élément isolant appartenant aux éléments de raccordement représentés sur les figures 4, 5 et 6;
- la figure 8 illustre un ensemble capteur de courant utilisé dans un disjoncteur à pôles jumelés selon l'invention.
- Figure 1 is an exploded perspective view of a multipole circuit breaker of known type;
- Figure 2 is a perspective view of the intermediate case of the circuit breaker according to Figure 1;
- Figure 3 is a longitudinal sectional view of a pole of the circuit breaker according to Figure 1, shown in the open position of the contacts;
- Figure 4 is a partial schematic top view showing the connecting elements between the ranges of contact protruding from the rear face of a circuit breaker with twin poles according to the invention and fixed connection pads secured to a chassis, in section, in which the circuit breaker is connected;
- Figures 5 and 6 show a rear perspective view of the upper part of two embodiments of a twin pole circuit breaker according to the invention;
- 7 shows in perspective, an insulating element belonging to the connecting elements shown in Figures 4, 5 and 6;
- FIG. 8 illustrates a current sensor assembly used in a circuit breaker with twin poles according to the invention.
Sur les figures 1 à 3, un disjoncteur multipolaire basse-tension, de type connu, comporte une pluralité de pôles juxtaposés disposés à l'intérieur d'un boîtier moulé en matériau isolant. Le boîtier, parallélépipèdique, est constitué par l'assemblage d'un boîtier intermédiaire 10 (figure 2), d'un couvercle 12 et d'un boitier arrière 14. La face avant 16 du boîtier intermédiaire 10 divise le boîtier en un compartiment antérieur 18, délimité par cette face et par le couvercle 12, et en un compartiment postérieur 20 destiné au logement des pôles et isolé électriquement du compartiment antérieur.In FIGS. 1 to 3, a low-voltage multipolar circuit breaker, of known type, comprises a plurality of juxtaposed poles disposed inside a molded case made of insulating material. The parallelepiped housing consists of an intermediate housing 10 (FIG. 2), a
Le compartiment antérieur 18 renferme un mécanisme (non représenté) de commande agissant sur un barreau transversal de commutation 22, commun à tous les pôles. Un levier 24 d'armement du mécanisme de commande, un déclencheur électronique (non représenté) provoquant un déclenchement automatique lors de l'apparition d'un courant de défaut, et des auxiliaires électriques de mesure, de signalisation et de contrôle (non représentés) sont également logés dans le compartiment antérieur 18.The
Le compartiment postérieur 20 est subdivisé longitudinalement en compartiments élémentaires de logement des pôles par des parois 26 isolantes de séparation des pôles. Chaque pôle du compartiment postérieur comporte une paire de contacts 28,30, séparables et une chambre 32 d'extinction d'arc amovible. Le contact fixe 28 est porté directement par une première plage de contact 34 faisant légèrement saillie vers l'extérieur de la face arrière du boîtier arrière 14. Le contact mobile 30 est connecté par un conducteur souple 36 (tresse) à une seconde plage de contact 38, faisant également saillie vers l'extérieur de la face arrière du boîtier arrière 14. Un transformateur de courant 40 est disposé autour de l'une des plages de contact, de manière à fournir au déclencheur une mesure de courant traversant le pôle correspondant.The
L'agencement interne et le fonctionnement d'un disjoncteur de ce type est connu et l'on se reportera avantageusement aux brevets français n° 2589624 et 2589625 (= EP-A- 0 225 207) pour une description plus détaillée.The internal arrangement and operation of a circuit breaker of this type is known and reference will advantageously be made to French patents No. 2589624 and 2589625 (= EP-A- 0 225 207) for a more detailed description.
Un tel disjoncteur est de préférence conçu de manière à être débrochable, c'est à dire à être destiné à venir s'embrocher dans un chassis fixe 42 (figure 4) portant, sur sa face arrière, deux rangées superposées de plages fixes de raccordement 44 destinées à être connectées respectivement aux deux rangées superposées de plages de contact 34,38 par l'intermédiaire de pinces de raccordement 46 constituées chacune par une pluralité de doigts 48 de contacts élémentaires juxtaposés. Les brevets français 2583217 et 2594265 décrivent respectivement des modes de réalisation particuliers de pinces de raccordement et d'un mécanisme d'embrochage et de débrochage d'un disjoncteur débrochable de ce type.Such a circuit breaker is preferably designed so as to be withdrawable, that is to say intended to be plugged into a fixed frame 42 (Figure 4) carrying, on its rear face, two superimposed rows of
Un gamme de disjoncteurs connus de ce type comporte deux modèles standards de boîtiers moulés, tripolaire et tétrapolaire, dont le calibre, de 800A à 3200A, est déterminé par le choix des pôles logés dans les compartiments élémentaires, c'est à dire essentiellement par les dimensions des plages de contact 34,38 solidaires du boîtier, des pinces 46 et des plages 44 de raccordement solidaires du châssis dans le cas d'un disjoncteur débrochable. Les transformateurs de courant 40 ont également un calibre adapté au calibre du disjoncteur.A range of known circuit breakers of this type includes two standard models of molded boxes, three-pole and four-pole, the size of which, from 800A to 3200A, is determined by the choice of poles housed in the elementary compartments, i.e. essentially by the dimensions of the
Selon l'invention il est possible d'utiliser les éléments standards des disjoncteurs connus pour former, dans un boîtier moulé de dimension standard, un disjoncteur de calibre supérieur à celui des pôles individuels qui le composent.According to the invention, it is possible to use the standard elements of known circuit breakers to form, in a molded case of standard dimension, a circuit breaker of greater caliber than that of the individual poles which compose it.
A titre d'exemple non limitatif, les figures 4 et 5 illustrent, respectivement en vue de dessus et en vue arrière partielles, un disjoncteur tripolaire de calibre 4000A constitué par un boîtier moulé tétrapolaire standard dans lequel sont montés quatre pôles individuels standards A,B,C et D dont le calibre est de 3200A. Sur la figure 4, le disjoncteur est représenté en position embrochée dans un châssis 42.By way of nonlimiting example, FIGS. 4 and 5 illustrate, respectively in top view and in partial rear view, a three-pole circuit breaker of 4000A caliber constituted by a standard four-pole molded case in which four individual standard poles A, B are mounted. , C and D with a rating of 3200A. In FIG. 4, the circuit breaker is shown in the plugged-in position in a
Les deux pôles centraux adjacents B et C sont jumelés, c'est à dire mis électriquement en parallèle, pour former l'un des pôles du disjoncteur tripolaire de calibre supérieur, les deux pôles latéraux A et D constituant respectivement les deux autres pôles du disjoncteur tripolaire.The two adjacent central poles B and C are paired, that is to say electrically parallel, to form one of the poles of the three-pole circuit breaker of higher rating, the two side poles A and D constituting the other two poles of the circuit breaker respectively. tripolar.
Les plages de contact 34,38, des différents pôles sont fixées à des barrettes de raccordement 50 destinées à venir s'embrocher sur les pinces de raccordement 46, elles-mêmes connectées aux plages fixes de raccordement 44, lors de l'embrochage du disjoncteur dans son châssis 42.The
De manière connue, une barrette de raccordement 50 est fixée à chaque plage de contact 34,38 d'un pôle latéral. Chaque plage de contact comporte des trous taraudés, dont seuls les axes sont représentés sur la figure 4, débouchant sur sa face arrière et venant en regard d'orifices 52 traversant la barrette associée de manière à permettre la fixation de la barrette sur la plage de contact au moyen de vis 54.In known manner, a
Les barrettes de raccordement 50 associées aux pôles latéraux A et D ont une forme évasée de l'avant vers l'arrière, de manière à ce que leur face avant, en contact avec la plage de contact 34,38, correspondante ayant la même largeur que cette plage, l'ensemble de la barrette ait une largeur supérieure à celle-ci, la partie arrière de la barrette dépassant latéralement du pôle, A ou D, correspondant en direction du pôle, B ou C, adjacent.The
La barrette de raccordement 50 centrale est commune aux pôles centraux jumelés B et C et donc fixée aux plages de contact 34 de ces deux pôles. Cette barrette centrale est plus étroite que les précédentes et peut être parallélépipèdique comme représenté sur les figures. Elle ne recouvre qu'une partie des plages de contact associées.The
Sur la face arrière du disjoncteur, l'espace est ainsi divisé en trois zones de raccordement, les deux zones de raccordement latérales ayant une largeur supérieure à celle du pôle, A ou D, associé, la zone de raccordement centrale ayant une largeur inférieure à la somme des largeurs des deux pôles jumelés, B et C, associés, et de préférence inférieure à la largeur des zones de raccordement latérales. Ainsi une zone de raccordement latérale vient chevaucher partiellement le pôle central adjacent.On the rear face of the circuit breaker, the space is thus divided into three connection zones, the two lateral connection zones having a width greater than that of the pole, A or D, associated, the central connection zone having a width less than the sum of the widths of the two twin poles, B and C, associated, and preferably less than the width of the lateral connection zones. Thus a lateral connection zone partially overlaps the adjacent central pole.
Un écran d'isolement 56, en matière plastique, recouvre les parties des plages de contact des pôles jumelés, B et C, qui ne sont pas en contact avec la barrette 50 associée, de manière à assurer l'isolement entre les parties exposées des plages de contact et les barrettes de raccordement 50 des pôles adjacents qui viennent jusque dans la zone disposée en regard des pôles centraux B et C.An
Selon un mode de réalisation préféré, représenté sur la figure 7, l'écran d'isolement 56 comporte un orifice 58 pour l'introduction de la barrette de raccordement 50, une partie centrale 60, dont la face arrière est disposée sensiblement dans le plan de la face avant du reste de l'écran d'isolement 56, servant au maintien de l'écran lorsque la barrette de raccordement est fixée sur les plages de contact des pôles jumelés. En effet cette partie centrale 60 est alors maintenue en place, vers l'avant par la face arrière du boîtier arrière 14, vers l'arrière par la partie centrale de la barrette 50 qui n'est pas en contact avec les plages de contact, et latéralement par les parois latérales, disposées face à face, des plages de contact des pôles jumelés.According to a preferred embodiment, represented in FIG. 7, the
Dans chaque zone de raccordement, la pince de raccordement 46 et la plage de raccordement 44 associées à une barrette de raccordement 50 ont une largeur correspondant à la plus grande largeur de cette dernière.In each connection zone, the
Ainsi, pour les zones de raccordement latérales, les pinces et les plages de raccordement sont plus larges que le pôle associé, A ou D, et dépassent latéralement en direction du pôle central, B ou C, adjacent. Le châssis 42 comporte des parois isolantes 62, perpendiculaires à sa face arrière, délimitant latéralement les zones de raccordement lorsque le disjoncteur est en position embrochée, et définissant une distance d'isolement minimale entre phases.Thus, for the lateral connection zones, the clamps and the connection pads are wider than the associated pole, A or D, and protrude laterally in the direction of the adjacent central pole, B or C. The
A titre d'exemple, non limitatif, pour un disjoncteur tripolaire de calibre 4000A, constitué à partir d'un boîtier tétrapolaire comportant quatre pôles standards de calibre 3200A, la pince 46 de raccordement centrale, associée aux pôles jumelés est une pince standard, comportant 56 doigts de contact 48, adaptée à un calibre de 3200A, tandis que les pinces de raccordement latérales comportent chacune 96 doigts de contact.By way of nonlimiting example, for a three-pole circuit breaker of caliber 4000A, formed from a four-pole case comprising four standard poles of caliber 3200A, the
Ainsi, dans chacune des parties associée à une phase du disjoncteur de calibre supérieur, un des éléments est surdimensionné. Pour la phase correspondant aux poles jumelés, les plages de contact, constituées par la mise en parallèle de deux plages de contact sont surdimensionnées, tandis que pour les deux autres phases, ce sont les éléments de raccordement des plages de contact aux phases qui sont surdimentionnées. On obtient ainsi une répartition optimale de l'échauffement, permettant l'utilisation pour un calibre donné d'un disjoncteur dont les pôles individuels sont prévus pour un calibre inférieur au calibre précité.Thus, in each of the parts associated with a phase of the circuit breaker of higher rating, one of the elements is oversized. For the phase corresponding to the twin poles, the contact pads, constituted by the paralleling of two contact pads are oversized, while for the other two phases, it is the elements for connecting the contact pads to the phases that are oversized. An optimal distribution of heating is thus obtained, allowing the use for a given rating of a circuit breaker whose individual poles are provided for a rating smaller than the aforementioned rating.
Les transformateurs de courant 40 sont également adaptés au calibre du disjoncteur. A titre d'exemple, pour un disjoncteur tripolaire de calibre 4000A, représenté sur les figures 4 et 5, les transformateurs de courant des pôles latéraux A et D sont prévus chacun pour un courant nominal de 4000A. Par contre, chacun des transformateurs de courant 40 des pôles jumelés, B et C, est prévu pour un courant nominal correspondant à la moitié du calibre du disjoncteur, soit 2000A, un transformateur-sommateur 64 (figure 8) recevant les signaux de sortie des deux transformateurs et fournissant au déclencheur la somme de ces signaux.The
Dans un mode de réalisation préféré, un transformateur-réducteur est interposé entre chacun des transformateurs de courant et le déclencheur, le transformateur-sommateur 64 servant également de réducteur aux deux transformateurs de courant des pôles jumelés. Tandis que les signaux de sortie des transformateurs de courant sont de l'ordre de 1A, les signaux de sortie des transformateurs-réducteurs appliqués au déclencheur, sont de l'ordre de 100mA. Les transformateurs-réducteurs et le transformateur-sommateur-réducteur sont de préférence disposés dans le compartiment antérieur 18, dans des alvéoles 66 prévues dans la face avant 16 du boîtier intermédiaire 10 (figures 1 et 2).In a preferred embodiment, a transformer-reducer is interposed between each of the current transformers and the trip device, the transformer-
Bien évidemment, la présente invention n'est pas limitée à l'utilisation d'un boîtier tétrapolaire pour former un disjoncteur tripolaire de calibre supérieur.Obviously, the present invention is not limited to the use of a four-pole case to form a three-pole circuit breaker of higher rating.
A titre d'exemple non limitatif, la figure 6 représente un disjoncteur tétrapolaire constitué à partir de deux boîtiers tripolaires accolés. L'axe des pôles (non représenté) est prolongé de manière à être commun à tous les pôles et le déclencheur (non représenté) est commun aux deux boîtiers. Un mode particulier de réalisation d'un boîtier formé par l'accolement de deux boîtiers est décrit dans la demande de brevet français No. 8717447, déposée le 10.12.1987. Le disjoncteur représenté sur la figure 6 est réalisé à partir de 6 compartiments élémentaires E,F,G,H,I et J. Comme dans le mode de réalisation de la figure 5, les trois phases du réseau sont respectivement associées à un premier pôle latéral, E, à barrette 50 de raccordement élargie, à deux pôles jumelés F et G, et à un second pôle H, à barrette de raccordement élargie. Le neutre est, quant à lui associé à l'autre pôle latéral J et séparé des autres pôles par un compartiment élementaire inutilisé I. Chacun des pôles E,F,G,H et J étant prévu pour un calibre de 3200A, on peut ainsi réaliser un disjoncteur tétrapolaire de calibre 4000A. Le courant parcourant normalement le neutre étant inférieur à celui parcourant les autres phases du réseau, il est inutile de prévoir une zone de raccordement élargie pour le neutre. Par contre, pour des raisons d'isolation, il est préférable de séparer le pôle associé au neutre des autres pôles et d'intercaler le compartiment élémentaire inutilisé I entre eux.By way of nonlimiting example, FIG. 6 represents a four-pole circuit breaker formed from two adjoining three-pole boxes. The axis of the poles (not shown) is extended so as to be common to all the poles and the release (not shown) is common to the two housings. A particular embodiment of a box formed by the joining of two boxes is described in French patent application No. 8717447, filed on 10.12.1987. The circuit breaker shown in Figure 6 is made from 6 elementary compartments E, F, G, H, I and J. As in the embodiment of Figure 5, the three network phases are respectively associated with a first pole lateral, E, with
De même, en accolant deux boîtiers tétrapolaires comportant huit compartiments élémentaires K,L,M,N,O,P,Q,R destinés au logement de 7 pôles standards individuels conçus chacun pour un calibre de 3200A, il est possible de réaliser, conformément à l'invention, un disjoncteur tripolaire de calibre 8000A (non représenté). Pour celà, deux pôles latéraux adjacents K et L sont jumelés et comportent une barrette de raccordement élargie, c'est à dire dont la largeur est supérieure à la largeur des deux pôles jumelés. Il en est de même des deux pôles latéraux adjacents opposés Q et R. Trois des pôles centraux, par exemple M,N et O sont connectés en parallèle, le compartiment élémentaire P restant inutilisé. Le calibre de ce disjoncteur est alors supérieur au calibre de 2 pôles standards mis en parallèle.Similarly, by joining two four-pole boxes comprising eight elementary compartments K, L, M, N, O, P, Q, R intended for the accommodation of 7 individual standard poles each designed for a rating of 3200A, it is possible to achieve, in accordance to the invention, a three-pole circuit breaker of caliber 8000A (not shown). For this, two adjacent lateral poles K and L are twinned and include an enlarged connection strip, that is to say one whose width is greater than the width of the two twinned poles. It is the same for the two adjacent opposite side poles Q and R. Three of the central poles, for example M, N and O are connected in parallel, the compartment elementary P remaining unused. The size of this circuit breaker is then greater than the size of 2 standard poles placed in parallel.
Claims (10)
- A low-voltage multipole circuit breaker, for high current intensities, comprising a plurality of poles juxtaposed inside an insulating moulded case (10, 12, 14), each pole comprising a pair of separable contacts (28, 30), an arc extinguishing chamber (32), a pair of contact terminal pads (34, 38) connected to the separable contacts and protruding outwards from the case, and a current transformer (40) disposed around one of the contact terminal pads (38) and whose output is connected to a trip device common to the different poles, the contact terminal pads (34, 38) being connected to connecting strips (50) designed to be connected respectively to the phases of a power system to be protected, a circuit breaker characterized in that at least one of the connecting strips (50), designed to be connected to one of the phases of the power system, is connected to at least two adjacent twinned poles (B, C ; F, G), electrically arranged in parallel, at least one of the connecting strips (50) connected to another pole of the circuit breaker having a width such that it extends laterally beyond said pole and partially overlaps the immediately adjacent pole, so that the circuit breaker can be used for a higher rating than that of the individual standard poles which make it up.
- The circuit breaker according to claim 1, characterized in that the connecting strips (50) extending laterally beyond the associated pole are of flared shape, their smallest face being in contact with the rear face of the associated contact terminal pad (34, 38).
- The circuit breaker according to either of the claims 1 or 2, characterized in that the connecting strip associated with the twinned poles (B, C ; F, G) covers only a part of the associated contact terminal pads, an insulating shield (56) being fitted on the free part of the contact terminal pads of the twinned poles in such a way as to provide insulation between said terminal pads and the adjacent connecting strips.
- The circuit breaker according to any one of the claims 1 to 3, characterized in that, the circuit breaker being of the draw-in type in a fixed frame (42) bearing fixed connecting terminal pads (44) designed to be connected by means of connecting grips (46) to the circuit breaker connecting strips (50), the width of the fixed terminal pads and of the connecting grips is appreciably equal to that of the corresponding strip, so as to form connecting zones at least one (A, D, E, H) of which is wider than the associated pole and at least one of which, associated with the twinned poles, has a smaller width than the previous one.
- The circuit breaker according to any one of the claims 1 to 4, characterized in that the outputs of the current transformers (40) of the twinned poles are connected to the input of a summing transformer (64) whose output is applied to the trip device.
- The circuit breaker according to any one of the claims 1 to 5, characterized in that it comprises four standard poles (A, B, C, D) juxtaposed in a single case, the two centre poles (B, C) being twinned and the connecting strips of the two lateral poles (A, D) laterally overlapping in the direction of the centre poles, so as to form a three-pole circuit breaker of a higher rating than the rating of each of its individual poles.
- The circuit breaker according to claim 6, characterized in that the four poles being standard poles of 3200A rating, the circuit breaker is a three-pole circuit breaker of 4000A rating.
- The circuit breaker according to any one of the claims 1 to 5, comprising six elementary compartments (E, F, G, H, I, J) juxtaposed in a single case and designed to house standard poles, two of the centre poles (F, G) being twinned and the connecting strips of the poles (E, H) adjacent to the twinned poles laterally overlapping in the direction of these poles, one of the elementary compartments (I) being unused, so as to form a four-pole circuit breaker of a higher rating than the rating of each of its individual poles.
- The circuit breaker according to any one of the claims 1 to 5, comprising eight elementary compartments juxtaposed in a single case and designed to house standard poles, the end poles being twinned two by two and associated with connecting strips laterally overlapping in the direction of the adjacent poles, three of the centre poles being twinned and one of the elementary compartments remaining unused, so as to form a three-pole circuit breaker of a higher rating than the rating of two of its individual poles mounted in parallel.
- The circuit breaker according to claim 8 or 9, characterized in that it is formed by adjoining two three-pole or four-pole circuit moulded case circuit breakers whose pole operating axis is common and comprising a common trip device.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR8717446 | 1987-12-10 | ||
FR8717446A FR2624650B1 (en) | 1987-12-10 | 1987-12-10 | MULTIPOLAR CIRCUIT BREAKER WITH HIGH CALIBER MOLDED HOUSING |
Publications (2)
Publication Number | Publication Date |
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EP0322321A1 EP0322321A1 (en) | 1989-06-28 |
EP0322321B1 true EP0322321B1 (en) | 1994-03-02 |
Family
ID=9357857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88420404A Expired - Lifetime EP0322321B1 (en) | 1987-12-10 | 1988-12-01 | High caliber multipole breaker with mould case |
Country Status (5)
Country | Link |
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US (1) | US4958135A (en) |
EP (1) | EP0322321B1 (en) |
JP (1) | JP2771199B2 (en) |
DE (1) | DE3888140T2 (en) |
FR (1) | FR2624650B1 (en) |
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DE102008050754A1 (en) * | 2008-10-07 | 2010-04-08 | Siemens Aktiengesellschaft | Switch pole housing section for switch pole of power switch, has receptacle for holding component of switch pole, where another switch pole housing section is connected to switch pole housing by opposite pressing of contact surfaces |
EP2590198A1 (en) * | 2011-11-02 | 2013-05-08 | Eaton Industries GmbH | Circuit breaker with internal voltage measurement |
EP3048625B1 (en) * | 2015-01-23 | 2017-08-16 | ABB S.p.A. | Low voltage switch pole |
CN105742125B (en) * | 2016-04-13 | 2018-08-21 | 首瑞(天津)电气设备有限公司 | The secondary circuit connection component and open frame circuit breaker of breaker |
USD971857S1 (en) * | 2020-05-19 | 2022-12-06 | National Breaker Services LLC | Display panel for electric circuit breaker |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3289049A (en) * | 1964-04-01 | 1966-11-29 | Wadsworth Electric Mfg Co | Circuit breakers |
US3879100A (en) * | 1972-07-07 | 1975-04-22 | Ferdinand E Chabot | Circuit breaker terminal connector, and heat dissipator assembly |
JPS5352603Y2 (en) * | 1973-11-07 | 1978-12-15 | ||
US4492941A (en) * | 1983-02-18 | 1985-01-08 | Heinemann Electric Company | Circuit breaker comprising parallel connected sections |
EP0225207B1 (en) * | 1985-10-31 | 1991-05-15 | Merlin Gerin | Cinematic transmission chain between the control mechanism and the poles of an electric circuit breaker with a moulded insulating casing |
-
1987
- 1987-12-10 FR FR8717446A patent/FR2624650B1/en not_active Expired - Fee Related
-
1988
- 1988-12-01 DE DE3888140T patent/DE3888140T2/en not_active Expired - Fee Related
- 1988-12-01 EP EP88420404A patent/EP0322321B1/en not_active Expired - Lifetime
- 1988-12-05 US US07/279,456 patent/US4958135A/en not_active Expired - Fee Related
- 1988-12-08 JP JP63310978A patent/JP2771199B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8912461B2 (en) | 2012-01-23 | 2014-12-16 | General Electric Company | Arc chute assembly and method of manufacturing same |
Also Published As
Publication number | Publication date |
---|---|
FR2624650B1 (en) | 1990-04-06 |
JPH01251530A (en) | 1989-10-06 |
DE3888140D1 (en) | 1994-04-07 |
DE3888140T2 (en) | 1994-08-04 |
US4958135A (en) | 1990-09-18 |
FR2624650A1 (en) | 1989-06-16 |
EP0322321A1 (en) | 1989-06-28 |
JP2771199B2 (en) | 1998-07-02 |
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