EP0649158B1 - Differential protection block with cable passage - Google Patents

Differential protection block with cable passage Download PDF

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Publication number
EP0649158B1
EP0649158B1 EP19940410091 EP94410091A EP0649158B1 EP 0649158 B1 EP0649158 B1 EP 0649158B1 EP 19940410091 EP19940410091 EP 19940410091 EP 94410091 A EP94410091 A EP 94410091A EP 0649158 B1 EP0649158 B1 EP 0649158B1
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EP
European Patent Office
Prior art keywords
circuit breaker
branch
differential protection
face
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19940410091
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German (de)
French (fr)
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EP0649158A1 (en
Inventor
Michel Bonniau
Marc Paupert
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication date
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Publication of EP0649158A1 publication Critical patent/EP0649158A1/en
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Expired - Lifetime legal-status Critical Current

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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
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages
    • H01H83/226—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages with differential transformer
    • 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
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together

Definitions

  • the present invention relates generally to a protective block differential adaptable on an electric circuit breaker.
  • electrical circuit breaker means any type an electrical appliance fulfilling, among other things, an electrical connection function and electrical cut-off, these electrical devices can for example be a electric circuit breaker, electric switch, etc.
  • a block of differential protection according to the preamble of claim 1 which is in the general form of a housing substantially parallelepiped intended to come to be pressed laterally and to be fixed against an electric circuit breaker and which has a protuberance in its upper part which protrudes from the corresponding upper edge of the circuit breaker electric, this protuberance having a hole which passes right through it.
  • a horizontal axis toroid is housed in the protrusion of the differential protection block and this torus surrounds the hole.
  • a totalizing transformer is constituted by this toroid on which is wound a secondary winding.
  • Such a differential protection block is well known of art, and we can briefly say that it consists in that it appears at the boundaries of the secondary winding a certain electrical voltage when the sum of currents which pass respectively through the various electric cables passing to across the hole is significantly different from zero.
  • a disadvantage of such a device known is that the electrical cables that must be connected manually to the electric circuit breaker by first passing through the the protrusion of the differential protection block can be connected abnormally for example one of these cables may be inadvertently connected without pass through the hole. In such a case, the differential protection does not work not because it does not add up all the currents flowing through the circuit breaker electric.
  • the electric cables which must pass through the hole in the differential protection block must be twisted from so as to present substantially a right angle between the end of the strand of the cable which is housed in the corresponding terminal of the electric circuit breaker and the part of the strand which passes through the hole of the differential protection block.
  • the electrical cables are relatively large, this is not an easy and satisfactory to operate to make the electrical connections.
  • the inflections mechanical at right angles to multiple electrical cables can favor certain deterioration of the electrical insulations of these cables and also promote poor electrical connection at the corresponding terminals of the electrical circuit breaker.
  • a electric circuit breaker comprising a housing of general shape substantially parallelepiped, this housing integrally comprising a part in protuberance which includes a magnetic coil torus.
  • the electric cables which reach or leave the circuit breaker must pass through a hole in this protrusion in the center of the magnetic coil torus, so that their ends are connected respectively to the different corresponding terminals of the circuit breaker.
  • a drawback of such a device lies in the fact that the transformer totalizer constituted by the magnetic coil torus constitutes an element which is integrated in the single box of the circuit breaker and which is therefore not separable from the circuit breaker.
  • Another drawback is that the cable connection terminals which must pass through the toroid are located in a housing formed between the part of the case which includes the torus and another part of the same case which includes the entire circuit breaker mechanism. Such an arrangement is not advantageous from the point of view of the convenience of connecting the cables to these terminals.
  • such a device can only be used for a circuit breaker bipolar, that is to say a circuit breaker comprising only two terminals of input connection (and two output connection terminals) and only one cable including two electrical conductors, one end of each conductor being connected to the corresponding terminal and the electric cable itself passing through the hole in the center of the magnetic coil torus.
  • a circuit breaker bipolar that is to say a circuit breaker comprising only two terminals of input connection (and two output connection terminals) and only one cable including two electrical conductors, one end of each conductor being connected to the corresponding terminal and the electric cable itself passing through the hole in the center of the magnetic coil torus.
  • An object of the present invention is to provide a protective block differential adaptable to a circuit breaker or an electric switch, in which the associating such a differential protection block with a circuit breaker or a particular electrical switch does not change the way of performing the different electrical connections of the circuit breaker or electrical switch.
  • Another object of the present invention is to provide such a block of differential protection also in modular form suitable for make the association with the circuit breaker or the electrical switch easy and reliable.
  • the housing can be produced at from two separate boxes, each of substantially parallelepiped shape, assembled perpendicularly, so that the first branch can come in support on the upper or lower side face of the circuit breaker.
  • the vertical passage is formed by several individual passages arranged in correspondence with the orifices.
  • the first branch may have connection pads projecting, adapted to engage through the holes in the terminals, and intended to ensure the electrical supply of the differential protection block.
  • FIG. 1 there is a general distinction between an electric circuit breaker conventional multipolar 1.
  • This circuit breaker 1 conventionally comprises a molded case whose general external shape is that of a parallelepiped which presents a face front 2, a left vertical side face 3, a right vertical side face 4 (not actually visible in the figure), an upper horizontal lateral face 5 (not actually visible in the figure), and a lower horizontal lateral face 6.
  • the faces lateral 3 and 4 are parallel to each other and the lateral faces 5 and 6 are parallel to each other.
  • the side face 5 includes orifices through which can be introduced stripped ends of cables, and terminals are arranged inside the housing near this side face 5 and are accessible from the outside so that connect and disconnect cables with these terminals.
  • the face side 6 includes openings 7 through which bare ends can be inserted cables (not shown), and terminals (not visible) are arranged inside the housing close to this lateral face 6 and are accessible from the outside so as to be able to connect and disconnect cables with these terminals.
  • circuit breaker 1 On the front face 2, holes 8 are formed which allow the passage of a tool to allow actuation of the terminals housed in the housing to make the connection or disconnecting cables.
  • the number of poles of circuit breaker 1 corresponds to the number orifices 7, the number of corresponding terminals and the number of holes 8.
  • the circuit breaker 1 is a quadrupole circuit breaker and by therefore it is designed to receive four electrical cables (visible in Figure 3) including each is introduced through one of the four orifices 7.
  • the orifices 7 are preferably arranged along a line parallel to the front face 2.
  • the cables (not shown in the Figure 1) are naturally presented substantially perpendicular to the face horizontal 6, that is to say they are presented naturally substantially perpendicularly, so that their ends can be easily inserted into the corresponding orifice 7.
  • the circuit breaker 1 When incoming cables are thus connected to the terminals at level of the upper face 5 and when other starting cables are thus connected to the terminals on the underside 6, the circuit breaker 1 is connected so operational and can therefore for example function to trip when the intensity of current in one or more of the cables exceeds a predetermined threshold.
  • the front face 2 of the circuit breaker 1 is provided with an opening handle 9 and circuit breaker closing 1.
  • the circuit breaker 1 can be a conventional one-piece multipole circuit breaker or it can in fact be constituted by several separate monopolar circuit breakers arranged side by side so as to constitute together a single multipole circuit breaker 1, as this is well known in the art.
  • the invention relates more particularly to the protective block differential 10 which is also shown in FIG. 1.
  • the protection block differential 10 conventionally includes a transformer totalizer 11 (shown schematically by a set of lines in dotted line) comprising a magnetic toroid and a secondary winding, and a relay trigger (not visible in Figure 1).
  • the summing transformer 11 and the trip relays are housed inside a box 12.
  • the housing 12 has two branches perpendicular to each other and rigidly connected to each other.
  • the first branch 13 is in the general form of a parallelepiped and it extends so generally horizontally, that is to say that its height is less than its others dimensions.
  • the first branch 13 further comprises an upper horizontal face 14 visible in FIG. 3.
  • the first branch 13 contains the transformer totalizer 11 whose magnetic toroid is arranged so as to present an axis vertical.
  • the first branch 13 further comprises at least one vertical passage 15 which goes right through it and which is located inside the magnetic torus of the totalizing transformer 11.
  • the totalizing transformer 11 has a general shape similar to a torus but elongated.
  • the central recess formed by the totalizing transformer 11 is a recess with a vertical axis but which has a elongated oval shape, oblong shape or circular shape.
  • the vertical passage 15 formed so as to pass right through vertically the first branch 13 has an elongated or oblong oval shape.
  • the dimensions of the vertical passage 15 are smaller than the dimensions of the hole central formed by the totalizing transformer 11. In this way, it is possible to house the summing transformer 11 inside the first branch 13 around internal walls which form the vertical passage 15 of the branch 13.
  • the second branch 17 is in the general form of a parallelepiped and it generally extends vertically, that is to say that its width is less than its other dimensions.
  • the second branch 17 contains the trip relay (not visible on the drawings) and is fitted with a reset lever 19.
  • the two branches 13 and 17 are connected to each other at a right angle, so that the horizontal face upper 14 of the first branch 13 and the left vertical side face 18 of the second branch 17 form an angle of 90 °.
  • the vertical side face 18 is intended to be pressed against the vertical lateral face 4 of the circuit breaker 1.
  • protuberance and recess (not shown) are provided at the side faces 4 and 18 so that, when these two lateral faces 4 and 18 come to rest one on the other these shapes ensure precise relative positioning of the block of differential protection 10 with respect to the circuit breaker 1.
  • a control finger 20 ( Figure 2) is further provided projecting from the vertical side face 18, this finger being, conventionally, movable so as to control an action of circuit breaker in circuit breaker 1 when the trip relay included in the block differential protection 10 is energized.
  • the mounting of a differential protection block 10 according to the invention on a conventional circuit breaker 1 can be performed as follows.
  • the differential protection block 10 is brought against the circuit breaker 1 of so that, on the one hand, its vertical lateral face 18 comes into contact with the face opposite vertical side 4 of the circuit breaker 1, and on the other hand the horizontal face upper 14 of the first branch 13 comes into contact with the horizontal face opposite 6 of the circuit breaker.
  • the vertical passage 15 of oblong shape substantially surrounds all of the orifices 7 formed at level of the lower horizontal surface 6 of the circuit breaker 1. It follows from this that is then possible to bring an electric cable by passing it vertically to the through the vertical passage 15 until its stripped end comes to thread in the corresponding orifice 7 in order to electrically connect this end stripped to the corresponding terminal housed in circuit breaker 1.
  • the secondary winding of the summing transformer 11 is electrically connected to the trip relay housed in the second branch 17 so that the appearance of an electrical signal at the terminals of this winding secondary can actuate, directly or indirectly, the trip relay, in a conventional way, so that this trigger relay can in turn control, in a conventional manner, the tripping of circuit breaker 1 via control finger 20.
  • this protective block differential 10 further comprises, as can be seen in FIGS. 1 to 4, tracks 22 which project upwards from the upper horizontal face 14 of the first branch 13. These areas 22 are arranged so as to engage with the through corresponding orifices 7 made at the horizontal face lower 6 of circuit breaker 1, when differential protection block 10 comes connect to circuit breaker 1.
  • FIG 4 there is shown a terminal 23 which is normally housed at inside the circuit breaker 1 opposite a corresponding orifice 7.
  • a cable 24 which is normally passed through the vertical passage 15 of the differential protection block 10 and the stripped end 25 of which is housed in terminal 23 to be connected to it.
  • track 22 comes on automatically in the terminal 23 housing, and thus the branch connection described above can be easily obtained during this coupling.
  • the differential protection block is configured according to an alternative embodiment with respect to the differential protection block of the figure 1.
  • This alternative embodiment consists in that the vertical passage 15 of the block of differential protection of figure 1 is replaced by a number of passages vertical 15A, 15B, 15C, 15D which are arranged in correspondence with the orifices 7 of the circuit breaker 1.
  • each cable 24 passes through an individual vertical passage and the cable is better guided in such an individual passage.
  • the totalizing transformer 11 surrounds the assembly formed by these different vertical passages 15A to 15D, as for the first embodiment of FIG. 1.
  • FIG. 5 another alternative embodiment of the invention in which the housing 12 of the differential protection block 10 is not formed in one piece, as for the embodiments of FIGS. 1 to 3, but it is formed in two separate pieces 12A and 12B.
  • Box 12A corresponds substantially to branch 17 of the first embodiment and the housing 12B corresponds substantially to branch 13 of the first embodiment.
  • removable fastening elements are provided on the two separate housings 12A and 12B of so that the housing 12B can be fixed either on the face upper 30 of the housing 12A (as shown on the left side of the Figure 5), either on the underside 31 of the housing 12A (as shown in the right part of figure 5).
  • This alternative embodiment makes it possible to be able to use the same parts forming the housing 12 of the differential protection block according to the invention to either constitute a differential protection block intended to come measure the differential currents at the supply cables of a circuit breaker, i.e. constitute a differential protection block intended to measure the currents differential at the circuit breaker feeder cable.

Description

La présente invention concerne de façon générale un bloc de protection différentielle adaptable sur un disjoncteur électrique.The present invention relates generally to a protective block differential adaptable on an electric circuit breaker.

Dans la suite du texte, on entendra par "disjoncteur électrique" tout type d'appareil électrique remplissant entre autre une fonction de connexion électrique et de coupure électrique, ces appareils électriques pouvant être par exemple un disjoncteur électrique, un interrupteur électrique, etc.In the remainder of the text, the term “electric circuit breaker” means any type an electrical appliance fulfilling, among other things, an electrical connection function and electrical cut-off, these electrical devices can for example be a electric circuit breaker, electric switch, etc.

Dans la suite du texte également, on supposera par simple commodité d'explication que le disjoncteur électrique est disposé verticalement de façon habituelle et qu'il inclut des bornes d'entrée et de sortie respectivement alignées selon deux rangées horizontales, et on utilisera les termes "horizontal", "vertical", etc. d'une façon relative à cette position supposée du disjoncteur.In the rest of the text also, we will assume for simple convenience Explanation that the electric circuit breaker is arranged vertically so and that it includes input and output terminals respectively aligned according to two horizontal rows, and we will use the terms "horizontal", "vertical", etc. in a way relative to this supposed position of the circuit breaker.

On connaít déjà, au travers du document EP-A-0 008 026, un bloc de protection différentielle selon le préambule de la revendication 1 qui se présente sous la forme générale d'un boítier sensiblement parallépipédique destiné à venir se plaquer latéralement et se fixer contre un disjoncteur électrique et qui comporte dans sa partie supérieure une protubérance qui est en saillie par rapport au bord supérieur correspondant du disjoncteur électrique, cette protubérance présentant un trou qui la traverse de part en part. Un tore d'axe horizontal est logé dans la protubérance du bloc de protection différentielle et ce tore entoure le trou. Un transformateur totalisateur est constitué par ce tore sur lequel est enroulé un enroulement secondaire. Lorsqu'un tel bloc de protection différentielle est ainsi fixé latéralement contre un disjoncteur électrique, la personne qui effectue l'installation électrique doit obligatoirement faire passer tous les câbles d'arrivée (ou de départ) qui sont destinés à venir se brancher respectivement sur les différentes bornes d'arrivée (ou de départ) du disjoncteur au travers du trou de la protubérance. Ainsi, ces câbles électriques qui traversent ensemble le trou de la protubérance constituent un primaire du transformateur totalisateur dont l'enroulement du tore constitue le secondaire. Un relais de déclenchement est prévu à l'intérieur du boítier parallélépipédique du bloc de protection différentielle et il est relié aux bornes de l'enroulement secondaire.We already know, through document EP-A-0 008 026, a block of differential protection according to the preamble of claim 1 which is in the general form of a housing substantially parallelepiped intended to come to be pressed laterally and to be fixed against an electric circuit breaker and which has a protuberance in its upper part which protrudes from the corresponding upper edge of the circuit breaker electric, this protuberance having a hole which passes right through it. A horizontal axis toroid is housed in the protrusion of the differential protection block and this torus surrounds the hole. A totalizing transformer is constituted by this toroid on which is wound a secondary winding. When such a protective block differential is thus fixed laterally against an electric circuit breaker, the person who performs the electrical installation must pass all cables of arrival (or departure) which are intended to come and connect respectively to the different terminals of arrival (or departure) of the circuit breaker through the hole of the protuberance. So these electrical cables that pass through the hole in the protuberance constitute a primary of the totalizing transformer whose winding torus constitutes the secondary. A trip relay is provided inside the parallelepipedic case of the differential protection block and it is connected to the terminals secondary winding.

Le fonctionnement d'un tel bloc de protection différentielle est bien connu de l'art, et on peut dire brièvement qu'il consiste en ce qu'il apparaít aux bornes de l'enroulement secondaire une certaine tension électrique lorsque la somme des courants qui traversent respectivement les différents câbles électriques passant au travers du trou est sensiblement différente de zéro. Un inconvénient d'un tel dispositif connu réside dans le fait que les câbles électriques qui doivent être branchés manuellement au disjoncteur électrique en passant préalablement au travers du trou de la protubérance du bloc de protection différentielle peuvent être branchés anormalement, par exemple l'un de ces câbles peut être par inadvertance branché sans passer au travers du trou. Dans un tel cas, la protection différentielle ne fonctionne pas du fait qu'elle ne totalise pas l'ensemble des courants qui traversent le disjoncteur électrique.The operation of such a differential protection block is well known of art, and we can briefly say that it consists in that it appears at the boundaries of the secondary winding a certain electrical voltage when the sum of currents which pass respectively through the various electric cables passing to across the hole is significantly different from zero. A disadvantage of such a device known is that the electrical cables that must be connected manually to the electric circuit breaker by first passing through the the protrusion of the differential protection block can be connected abnormally for example one of these cables may be inadvertently connected without pass through the hole. In such a case, the differential protection does not work not because it does not add up all the currents flowing through the circuit breaker electric.

D'autre part, dans un tel dispositif connu, les câbles électriques qui doivent passer au travers du trou du bloc de protection différentielle doivent être tordus de façon à présenter sensiblement un angle droit entre l'extrémité du brin du câble qui vient se loger dans la borne correspondante du disjoncteur électrique et la partie du brin qui passe au travers du trou du bloc de protection différentielle. Lorsque les câbles électriques sont relativement gros, ceci ne constitue pas une façon aisée et satisfaisante d'opérer pour effectuer les branchements électriques. Les flexions mécaniques à angle droit multiples des câbles électriques peuvent favoriser certaines détériorations des isolations électriques de ces câbles et favoriser aussi une mauvaise connexion électrique au niveau des bornes correspondantes du disjoncteur électrique.On the other hand, in such a known device, the electric cables which must pass through the hole in the differential protection block must be twisted from so as to present substantially a right angle between the end of the strand of the cable which is housed in the corresponding terminal of the electric circuit breaker and the part of the strand which passes through the hole of the differential protection block. When the electrical cables are relatively large, this is not an easy and satisfactory to operate to make the electrical connections. The inflections mechanical at right angles to multiple electrical cables can favor certain deterioration of the electrical insulations of these cables and also promote poor electrical connection at the corresponding terminals of the electrical circuit breaker.

On connaít aussi, par exemple au travers du document DE-A-3 338 961, un disjoncteur électrique comprenant un boítier de forme générale sensiblement parallélépipédique, ce boítier comprenant de façon intégrante une partie en protubérance qui inclut un tore magnétique à bobine. Les câbles électriques qui parviennent ou qui partent du disjoncteur doivent passer au travers d'un trou ménagé dans cette protubérance au centre du tore magnétique à bobine, de telle sorte que leurs extrémités soient connectées respectivement aux différentes bornes correspondantes du disjoncteur.We also know, for example through document DE-A-3 338 961, a electric circuit breaker comprising a housing of general shape substantially parallelepiped, this housing integrally comprising a part in protuberance which includes a magnetic coil torus. The electric cables which reach or leave the circuit breaker must pass through a hole in this protrusion in the center of the magnetic coil torus, so that their ends are connected respectively to the different corresponding terminals of the circuit breaker.

Un inconvénient d'un tel dispositif réside dans le fait que le transformateur totalisateur constitué par le tore magnétique à bobine constitue un élément qui est intégré au boítier unique du disjoncteur et qui n'est donc pas séparable du disjoncteur. Un autre inconvénient réside dans le fait que les bornes de connexion des câbles électriques qui doivent traverser le tore sont situées dans un logement ménagé entre la partie du boítier qui inclut le tore et une autre partie du même boítier qui inclut l'ensemble du mécanisme du disjoncteur. Une telle disposition n'est pas avantageuse du point de vue de la commodité de branchement des câbles sur ces bornes.A drawback of such a device lies in the fact that the transformer totalizer constituted by the magnetic coil torus constitutes an element which is integrated in the single box of the circuit breaker and which is therefore not separable from the circuit breaker. Another drawback is that the cable connection terminals which must pass through the toroid are located in a housing formed between the part of the case which includes the torus and another part of the same case which includes the entire circuit breaker mechanism. Such an arrangement is not advantageous from the point of view of the convenience of connecting the cables to these terminals.

Dans la pratique, un tel dispositif ne peut être utilisé que pour un disjoncteur bipolaire c'est-à-dire un disjoncteur comprenant uniquement deux bornes de connexion d'entrée (et deux bornes de connexion de sortie) et seulement un câble incluant deux conducteurs électriques, une extrémité de chaque conducteur étant connectée à la borne correspondante et le câble électrique lui-même passant au travers du trou ménagé au centre du tore magnétique à bobine. Le fait que la partie du disjoncteur constituant la fonction de protection différentielle fasse corps d'une façon non séparable avec le reste du disjoncteur fait que cet ensemble ne peut pas être utilisé de façon optimisée dans une installation électrique complexe dans laquelle, en général, il n'est pas nécessaire que tous les disjoncteurs électriques comportent la fonction de protection différentielle.In practice, such a device can only be used for a circuit breaker bipolar, that is to say a circuit breaker comprising only two terminals of input connection (and two output connection terminals) and only one cable including two electrical conductors, one end of each conductor being connected to the corresponding terminal and the electric cable itself passing through the hole in the center of the magnetic coil torus. The fact that the part of the circuit breaker constituting the differential protection function is integral in a way not separable from the rest of the circuit breaker, this set cannot be used optimally in a complex electrical installation in which, in general, not all electrical circuit breakers include the function of differential protection.

Un objet de la présente invention consiste à proposer un bloc de protection différentielle adaptable sur un disjoncteur ou un interrupteur électrique, dans lequel le fait d'associer un tel bloc de protection différentielle à un disjoncteur ou un interrupteur électrique particulier ne modifie pas la façon d'effectuer les différentes connexions électriques du disjoncteur ou de l'interrupteur électrique.An object of the present invention is to provide a protective block differential adaptable to a circuit breaker or an electric switch, in which the associating such a differential protection block with a circuit breaker or a particular electrical switch does not change the way of performing the different electrical connections of the circuit breaker or electrical switch.

Un autre objet de la présente invention consiste à proposer un tel bloc de protection différentielle se présentant en outre sous une forme modulaire adaptée pour rendre aisée et fiable l'association avec le disjoncteur ou l'interrupteur électrique.Another object of the present invention is to provide such a block of differential protection also in modular form suitable for make the association with the circuit breaker or the electrical switch easy and reliable.

L'invention concerne donc un bloc de protection différentielle adaptable sur un disjoncteur électrique, ledit disjoncteur électrique étant de forme sensiblement parallélépipédique et incluant :

  • un mécanisme de déclenchement du disjoncteur,
  • une première face latérale qui inclut une rangée horizontale d'orifices de raccordement à des bornes
  • une seconde face latérale, perpendiculaire à la première face ;
The invention therefore relates to a differential protection block adaptable to an electrical circuit breaker, said electrical circuit breaker being of substantially parallelepipedal shape and including:
  • a circuit breaker tripping mechanism,
  • a first side face which includes a horizontal row of terminal connection holes
  • a second lateral face, perpendicular to the first face;

ledit bloc incluant :

  • un transformateur totalisateur comprenant un tore magnétique et un enroulement secondaire susceptible de délivrer un signal, et
  • un relais de déclenchement commandé par ledit signal et servant à piloter le mécanisme de déclenchement du disjoncteur.
said block including:
  • a totalizing transformer comprising a magnetic toroid and a secondary winding capable of delivering a signal, and
  • a trip relay controlled by said signal and used to control the trip mechanism of the circuit breaker.

Selon l'invention, le boítier du bloc de protection différentielle comporte deux branches perpendiculaires dont chacune est de forme sensiblement parallélépipédique :

  • une première branche qui vient prendre appui sur la première face du boítier du disjoncteur, qui renferme le tore d'axe vertical et qui présente au moins un passage vertical de part en part de manière à créer un passage incontournable au travers du tore lors du raccordement des câbles aux bornes ; et
  • une seconde branche qui vient prendre appui sur la seconde face du boítier du disjoncteur et qui renferme le relais de déclenchement.
According to the invention, the case of the differential protection block comprises two perpendicular branches, each of which is of substantially parallelepiped shape:
  • a first branch which comes to bear on the first face of the case of the circuit breaker, which contains the torus with a vertical axis and which has at least one vertical passage right through so as to create an inescapable passage through the torus during connection cables to the terminals; and
  • a second branch which comes to bear on the second face of the case of the circuit breaker and which contains the trip relay.

Selon un mode de réalisation de l'invention, le boítier peut être réalisé à partir de deux boítiers séparés, chacun de forme sensiblement parallélépipédique, assemblés perpendiculairement, de sorte que la première branche puisse venir en appui sur la face latérale supérieure ou inférieure du disjoncteur.According to one embodiment of the invention, the housing can be produced at from two separate boxes, each of substantially parallelepiped shape, assembled perpendicularly, so that the first branch can come in support on the upper or lower side face of the circuit breaker.

Selon un autre mode de réalisation de l'invention, le passage vertical est formé par plusieurs passages individuels disposés en correspondance avec les orifices.According to another embodiment of the invention, the vertical passage is formed by several individual passages arranged in correspondence with the orifices.

En outre, la première branche peut comporter des plages de raccordement disposées en saillie, adaptées à venir s'engager au travers des orifices dans les bornes, et destinées à assurer l'alimentation électrique du bloc de protection différentielle.In addition, the first branch may have connection pads projecting, adapted to engage through the holes in the terminals, and intended to ensure the electrical supply of the differential protection block.

Ces objets, caractéristiques et avantages, ainsi que d'autres de la présente invention seront mieux compris lors de la description détaillée d'un exemple de réalisation qui va suivre, illustrée par les figures annexées parmi lesquelles :

  • la figure 1 est une vue en perspective, prise depuis l'avant et le dessous, d'un ensemble constitué par un disjoncteur classique et par un bloc de protection différentielle selon l'invention, ces deux éléments étant disposés dans une position écartée l'un de l'autre précédant leur accouplement ;
  • la figure 2 est une vue en perspective, prise depuis l'avant et le dessous, d'un autre mode de réalisation d'un bloc de protection différentielle selon l'invention ;
  • la figure 3 est une vue en perspective, prise depuis l'avant et le dessus, du bloc de protection différentielle de la figure 2 ;
  • la figure 4 est une vue en perspective d'une borne et de certains éléments connectés à cette borne, vue dans laquelle la borne est une borne classique incluse dans le disjoncteur représenté sur la figure 1 et un des éléments fait partie du bloc de protection différentielle selon l'invention représenté sur les figures précédentes ; et
  • la figure 5 est une vue en perspective d'une variante de réalisation d'un bloc de protection différentielle selon la présente invention, cette vue étant destinée à montrer simultanément deux possibilités différentes de montage pour une telle variante de réalisation du bloc de protection différentielle.
    • These objects, characteristics and advantages, as well as others of the present invention will be better understood during the detailed description of an exemplary embodiment which will follow, illustrated by the appended figures among which:
  • Figure 1 is a perspective view, taken from the front and below, of an assembly consisting of a conventional circuit breaker and a differential protection block according to the invention, these two elements being arranged in a position apart one of the other preceding their mating;
  • Figure 2 is a perspective view, taken from the front and bottom, of another embodiment of a differential protection block according to the invention;
  • Figure 3 is a perspective view, taken from the front and top, of the differential protection block of Figure 2;
  • FIG. 4 is a perspective view of a terminal and of certain elements connected to this terminal, view in which the terminal is a conventional terminal included in the circuit breaker shown in FIG. 1 and one of the elements forms part of the differential protection block according to the invention shown in the previous figures; and
  • Figure 5 is a perspective view of an alternative embodiment of a differential protection block according to the present invention, this view being intended to simultaneously show two different mounting possibilities for such an alternative embodiment of the differential protection block.

    • Sur la figure 1, on distingue de façon générale un disjoncteur électrique classique multipolaire 1. Ce disjoncteur 1 comprend classiquement un boítier moulé dont la forme générale externe est celle d'un parallélépipède qui présente une face avant 2, une face latérale verticale gauche 3, une face latérale verticale droite 4 (non réellement visible sur la figure), une face latérale horizontale supérieure 5 (non réellement visible sur la figure), et une face latérale horizontale inférieure 6. Les faces latérales 3 et 4 sont parallèles l'une à l'autre et les faces latérales 5 et 6 sont parallèles l'une à l'autre. La face latérale 5 inclut des orifices par où peuvent être introduites des extrémités dénudées de câbles, et des bornes sont disposées à l'intérieur du boítier à proximité de cette face latérale 5 et sont accessibles de l'extérieur de façon à pouvoir connecter et déconnecter les câbles avec ces bornes. De la même façon, la face latérale 6 inclut des orifices 7 par où peuvent être introduites des extrémités dénudées de câbles (non représentés), et des bornes (non visibles) sont disposées à l'intérieur du boítier à proximité de cette face latérale 6 et sont accessibles de l'extérieur de façon à pouvoir connecter et déconnecter les câbles avec ces bornes.In FIG. 1, there is a general distinction between an electric circuit breaker conventional multipolar 1. This circuit breaker 1 conventionally comprises a molded case whose general external shape is that of a parallelepiped which presents a face front 2, a left vertical side face 3, a right vertical side face 4 (not actually visible in the figure), an upper horizontal lateral face 5 (not actually visible in the figure), and a lower horizontal lateral face 6. The faces lateral 3 and 4 are parallel to each other and the lateral faces 5 and 6 are parallel to each other. The side face 5 includes orifices through which can be introduced stripped ends of cables, and terminals are arranged inside the housing near this side face 5 and are accessible from the outside so that connect and disconnect cables with these terminals. In the same way, the face side 6 includes openings 7 through which bare ends can be inserted cables (not shown), and terminals (not visible) are arranged inside the housing close to this lateral face 6 and are accessible from the outside so as to be able to connect and disconnect cables with these terminals.

    Sur la face avant 2, sont ménagés des trous 8 qui permettent le passage d'un outil afin de permettre d'actionner les bornes logées dans le boítier pour effectuer la connexion ou la déconnexion des câbles. Le nombre de pôles du disjoncteur 1 correspond au nombre d'orifices 7, au nombre de bornes correspondantes ainsi qu'au nombre de trous 8. Sur l'exemple représenté sur la figure 1, le disjoncteur 1 est un disjoncteur quadripolaire et par conséquent il est conçu pour recevoir quatre câbles électriques (visibles sur la figure 3) dont chacun est introduit au travers d'un des quatre orifices 7. Le orifices 7 sont de préférence disposés suivant une ligne parallèle à la face avant 2. Les câbles (non représentés sur la figure 1) sont naturellement présentés sensiblement perpendiculairement à la face horizontale 6, c'est-à-dire qu'ils sont présentés naturellement sensiblement perpendiculairement, de façon à ce que leur extrémité puisse être facilement introduite dans l'orifice correspondant 7. Lorsque des câbles d'arrivée sont ainsi branchés sur les bornes au niveau de la face supérieure 5 et lorsque d'autres câbles de départ sont ainsi branchés sur les bornes au niveau de la face inférieure 6, le disjoncteur 1 est connecté de façon opérationnelle et peut donc par exemple fonctionner pour disjoncter lorsque l'intensité de courant dans un ou plusieurs des câbles dépasse un seuil prédéterminé.On the front face 2, holes 8 are formed which allow the passage of a tool to allow actuation of the terminals housed in the housing to make the connection or disconnecting cables. The number of poles of circuit breaker 1 corresponds to the number orifices 7, the number of corresponding terminals and the number of holes 8. On the example shown in FIG. 1, the circuit breaker 1 is a quadrupole circuit breaker and by therefore it is designed to receive four electrical cables (visible in Figure 3) including each is introduced through one of the four orifices 7. The orifices 7 are preferably arranged along a line parallel to the front face 2. The cables (not shown in the Figure 1) are naturally presented substantially perpendicular to the face horizontal 6, that is to say they are presented naturally substantially perpendicularly, so that their ends can be easily inserted into the corresponding orifice 7. When incoming cables are thus connected to the terminals at level of the upper face 5 and when other starting cables are thus connected to the terminals on the underside 6, the circuit breaker 1 is connected so operational and can therefore for example function to trip when the intensity of current in one or more of the cables exceeds a predetermined threshold.

    La face avant 2 du disjoncteur 1 est munie d'une manette 9 d'ouverture et fermeture du disjoncteur 1.The front face 2 of the circuit breaker 1 is provided with an opening handle 9 and circuit breaker closing 1.

    Le disjoncteur 1 peut être un disjoncteur classique monobloc multipolaire ou il peut être en fait constitué par plusieurs disjoncteurs monopolaires séparés disposés côte-à-côte de façon à constituer ensemble un seul disjoncteur multipolaires 1, comme cela est bien connu de l'art.The circuit breaker 1 can be a conventional one-piece multipole circuit breaker or it can in fact be constituted by several separate monopolar circuit breakers arranged side by side so as to constitute together a single multipole circuit breaker 1, as this is well known in the art.

    L'invention concerne plus particulièrement le bloc de protection différentielle 10 qui est représenté également sur la figure 1. Le bloc de protection différentielle 10 selon l'invention inclut, d'une façon classique, un transformateur totalisateur 11 (représenté de façon schématique par un ensemble de lignes en pointillés) comprenant un tore magnétique et un enroulement secondaire, et un relais de déclenchement (non visible sur la figure 1). Le transformateur totalisateur 11 et le relais de déclenchement sont logés à l'intérieur d'un boítier 12.The invention relates more particularly to the protective block differential 10 which is also shown in FIG. 1. The protection block differential 10 according to the invention conventionally includes a transformer totalizer 11 (shown schematically by a set of lines in dotted line) comprising a magnetic toroid and a secondary winding, and a relay trigger (not visible in Figure 1). The summing transformer 11 and the trip relays are housed inside a box 12.

    L'une des particularités de l'invention concerne la forme particulière du boítier 12, et une autre des particularités de l'invention concerne la forme particulière du transformateur totalisateur 11. Le boítier 12 comporte deux branches perpendiculaires entre elles et reliées rigidement l'une à l'autre. La première branche 13 se présente sous la forme générale d'un parallélépipède et elle s'étend de façon générale horizontalement, c'est-à-dire que sa hauteur est inférieure à ses autres dimensions.One of the features of the invention relates to the particular shape of the housing 12, and another of the features of the invention relates to the particular shape of the totalizing transformer 11. The housing 12 has two branches perpendicular to each other and rigidly connected to each other. The first branch 13 is in the general form of a parallelepiped and it extends so generally horizontally, that is to say that its height is less than its others dimensions.

    La première branche 13 comprend en autre une face horizontale supérieure 14 visible sur la figure 3. La première branche 13 renferme le transformateur totalisateur 11 dont le tore magnétique est disposé de façon à présenter un axe vertical. La première branche 13 comporte en outre au moins un passage vertical 15 qui la traverse de part en part et qui est situé à l'intérieur du tore magnétique du transformateur totalisateur 11. Dans l'exemple de réalisation représenté sur la figure 1, le transformateur totalisateur 11 présente une forme générale assimilable à un tore mais de forme allongée. Autrement dit, l'évidement central formé par le transformateur totalisateur 11 est un évidement d'axe vertical mais qui présente une forme ovale allongée, une forme oblongue ou une forme circulaire. D'une manière similaire, le passage vertical 15 ménagé de façon à traverser de part en part verticalement la première branche 13 présente une forme ovale allongée ou oblongue. Les dimensions du passage vertical 15 sont plus petites que les dimensions du trou central formé par le transformateur totalisateur 11. De cette façon, il est possible de loger le transformateur totalisateur 11 à l'intérieur de la première branche 13 autour des parois internes qui forment le passage vertical 15 de la branche 13.The first branch 13 further comprises an upper horizontal face 14 visible in FIG. 3. The first branch 13 contains the transformer totalizer 11 whose magnetic toroid is arranged so as to present an axis vertical. The first branch 13 further comprises at least one vertical passage 15 which goes right through it and which is located inside the magnetic torus of the totalizing transformer 11. In the embodiment shown in the figure 1, the totalizing transformer 11 has a general shape similar to a torus but elongated. In other words, the central recess formed by the totalizing transformer 11 is a recess with a vertical axis but which has a elongated oval shape, oblong shape or circular shape. In a way similar, the vertical passage 15 formed so as to pass right through vertically the first branch 13 has an elongated or oblong oval shape. The dimensions of the vertical passage 15 are smaller than the dimensions of the hole central formed by the totalizing transformer 11. In this way, it is possible to house the summing transformer 11 inside the first branch 13 around internal walls which form the vertical passage 15 of the branch 13.

    La seconde branche 17 se présente sous la forme générale d'un parallélépipède et elle s'étend de façon générale verticalement, c'est-à-dire que sa largeur est inférieure à ses autres dimensions. The second branch 17 is in the general form of a parallelepiped and it generally extends vertically, that is to say that its width is less than its other dimensions.

    La seconde branche 17 renferme le relais de déclenchement (non visible sur les dessins) et est munie d'une manette 19 de réarmement. Les deux branches 13 et 17 sont reliées l'une à l'autre à angle droit, de telle sorte que la face horizontale supérieure 14 de la première branche 13 et la face latérale verticale gauche 18 de la seconde branche 17 forment un angle de 90°. La face latérale verticale 18 est destinée à venir se plaquer contre la face latérale verticale 4 du disjoncteur 1. Des formes en protubérance et en creux (non représentées) sont prévues au niveau des faces latérales 4 et 18 de façon à ce que, lorsque ces deux faces latérales 4 et 18 viennent se plaquer l'une sur l'autre ces formes assurent un positionnement relatif précis du bloc de protection différentielle 10 par rapport au disjoncteur 1. Un doigt de commande 20 (figure 2) est en outre prévu en saillie par rapport à la face latérale verticale 18, ce doigt étant, de façon classique, déplaçable de façon à commander une action de disjonction dans le disjoncteur 1 lorsque le relais de déclenchement inclus dans le bloc de protection différentielle 10 est excité.The second branch 17 contains the trip relay (not visible on the drawings) and is fitted with a reset lever 19. The two branches 13 and 17 are connected to each other at a right angle, so that the horizontal face upper 14 of the first branch 13 and the left vertical side face 18 of the second branch 17 form an angle of 90 °. The vertical side face 18 is intended to be pressed against the vertical lateral face 4 of the circuit breaker 1. protuberance and recess (not shown) are provided at the side faces 4 and 18 so that, when these two lateral faces 4 and 18 come to rest one on the other these shapes ensure precise relative positioning of the block of differential protection 10 with respect to the circuit breaker 1. A control finger 20 (Figure 2) is further provided projecting from the vertical side face 18, this finger being, conventionally, movable so as to control an action of circuit breaker in circuit breaker 1 when the trip relay included in the block differential protection 10 is energized.

    Le montage d'un bloc de protection différentielle 10 selon l'invention sur un disjoncteur classique 1 peut s'effectuer de la façon suivante. Au moment d'effectuer ce montage, il n'y a pas encore de câble de branché sur les bornes situées au niveau des évidements 7 de la face latérale horizontale 6 du disjoncteur 1. Dans cette condition, le bloc de protection différentielle 10 est amené contre le disjoncteur 1 de telle sorte que, d'une part sa face latérale verticale 18 vienne en contact avec la face latérale verticale opposée 4 du disjoncteur 1, et que d'autre part la face horizontale supérieure 14 de la première branche 13 vienne en contact avec la face horizontale opposée 6 du disjoncteur. Dans cette position ainsi obtenue, le passage vertical 15 de forme oblongue vient entourer sensiblement l'ensemble des orifices 7 ménagés au niveau de la surface horizontale inférieure 6 du disjoncteur 1. Il résulte de cela qu'il est alors possible d'amener un câble électrique en le faisant passer verticalement au travers du passage vertical 15 jusqu'à ce que son extrémité dénudée vienne s'enfiler dans l'orifice 7 correspondant afin de connecter électriquement cette extrémité dénudée à la borne correspondante logée dans le disjoncteur 1.The mounting of a differential protection block 10 according to the invention on a conventional circuit breaker 1 can be performed as follows. When performing this assembly, there is not yet a cable connected to the terminals located at the level recesses 7 in the horizontal lateral face 6 of the circuit breaker 1. In this condition, the differential protection block 10 is brought against the circuit breaker 1 of so that, on the one hand, its vertical lateral face 18 comes into contact with the face opposite vertical side 4 of the circuit breaker 1, and on the other hand the horizontal face upper 14 of the first branch 13 comes into contact with the horizontal face opposite 6 of the circuit breaker. In this position thus obtained, the vertical passage 15 of oblong shape substantially surrounds all of the orifices 7 formed at level of the lower horizontal surface 6 of the circuit breaker 1. It follows from this that is then possible to bring an electric cable by passing it vertically to the through the vertical passage 15 until its stripped end comes to thread in the corresponding orifice 7 in order to electrically connect this end stripped to the corresponding terminal housed in circuit breaker 1.

    En d'autres termes, il devient impossible de raccorder les câbles 24 aux bornes du disjoncteur 1 sans que les câbles 24 ne passent au travers du passage vertical 15, donc au travers du tore.In other words, it becomes impossible to connect the cables 24 to the terminals of circuit breaker 1 without cables 24 passing through the passage vertical 15, therefore through the torus.

    Dans l'exemple représenté sur la figure 1, on peut ainsi connecter quatre câbles dans les quatre bornes situées en correspondance avec les quatre orifice 7, ces quatre câbles passant donc ensemble au travers du passage vertical 15 et au travers du tore magnétique du transformateur totalisateur 11 logé dans la première branche 13 autour du passage vertical 15. Il résulte de cela que les quatre câbles constituent ensemble un enroulement primaire et que l'enroulement secondaire disposé autour du tore magnétique du transformateur totalisateur 11 permet de produire un signal électrique lorsque la somme des courants électriques circulant au travers des quatre câbles n'est pas égale à zéro, comme cela est bien connu en soi.In the example shown in Figure 1, we can thus connect four cables in the four terminals located in correspondence with the four orifice 7, these four cables therefore passing together through the vertical passage 15 and through the magnetic toroid of the totalizing transformer 11 housed in the first branch 13 around the vertical passage 15. It follows from this that the four cables constitute together a primary winding and that the secondary winding arranged around the totalizing transformer 11 toroid produces a signal electric when the sum of the electric currents flowing through the four cables is not zero, as is well known per se.

    Bien entendu, l'enroulement secondaire du transformateur totalisateur 11 est connecté électriquement au relais de déclenchement logé dans la seconde branche 17 de telle sorte que l'apparition d'un signal électrique aux bornes de cet enroulement secondaire puisse actionner, directement ou indirectement, le relais de déclenchement, d'une façon classique, afin que ce relais de déclenchement puisse à son tour commander, de façon classique, le déclenchement du disjoncteur 1 par l'intermédiaire du doigt de commande 20.Of course, the secondary winding of the summing transformer 11 is electrically connected to the trip relay housed in the second branch 17 so that the appearance of an electrical signal at the terminals of this winding secondary can actuate, directly or indirectly, the trip relay, in a conventional way, so that this trigger relay can in turn control, in a conventional manner, the tripping of circuit breaker 1 via control finger 20.

    A l'intérieur du boítier 12 du bloc de protection différentielle 10 selon l'invention, il est possible d'inclure un ensemble d'éléments électriques, électroniques et/ou électromécaniques permettant d'assurer, de façon connue, la fonction de protection différentielle. Cependant, dans un grand nombre de cas, ces éléments électriques, électroniques, et/ou électromécaniques demandent pour fonctionner une alimentation électrique. Pour obtenir une telle alimentation électrique dans le bloc de protection différentielle 10 selon la présente invention, ce bloc de protection différentielle 10 comporte en outre, comme on peut le voir sur les figures 1 à 4, des plages 22 qui font saillie vers le haut à partir de la face horizontale supérieure 14 de la première branche 13. Ces plages 22 sont disposées de façon à venir s'engager au travers des orifices 7 correspondants ménagés au niveau de la face horizontale inférieure 6 du disjoncteur 1, lorsque le bloc de protection différentielle 10 vient s'accoupler au disjoncteur 1.Inside the housing 12 of the differential protection block 10 according to the invention, it is possible to include a set of electrical, electronic elements and / or electromechanical mechanisms enabling, in a known manner, the function of differential protection. However, in a large number of cases, these elements electrical, electronic, and / or electromechanical require to operate a power supply. To obtain such a power supply in the block of differential protection 10 according to the present invention, this protective block differential 10 further comprises, as can be seen in FIGS. 1 to 4, tracks 22 which project upwards from the upper horizontal face 14 of the first branch 13. These areas 22 are arranged so as to engage with the through corresponding orifices 7 made at the horizontal face lower 6 of circuit breaker 1, when differential protection block 10 comes connect to circuit breaker 1.

    Sur la figure 4, on a représenté une borne 23 qui est normalement logée à l'intérieur du disjoncteur 1 en face d'un orifice 7 correspondant. On a représenté également un câble 24 qui est normalement passé au travers du passage vertical 15 du bloc de protection différentielle 10 et dont l'extrémité dénudée 25 vient se loger dans la borne 23 pour y être connectée. On voit également que, lors de l'accouplement du bloc de protection différentielle 10 avec le disjoncteur 1, la plage 22 vient s'enfiler automatiquement dans le logement de la borne 23, et ainsi la connexion en dérivation décrite précédemment peut être facilement obtenue lors de cet accouplement.In Figure 4, there is shown a terminal 23 which is normally housed at inside the circuit breaker 1 opposite a corresponding orifice 7. We represented also a cable 24 which is normally passed through the vertical passage 15 of the differential protection block 10 and the stripped end 25 of which is housed in terminal 23 to be connected to it. We also see that, during the coupling of the differential protection block 10 with circuit breaker 1, track 22 comes on automatically in the terminal 23 housing, and thus the branch connection described above can be easily obtained during this coupling.

    Sur les figures 2 et 3, le bloc de protection différentielle est configuré selon une variante de réalisation par rapport au bloc de protection différentielle de la figure 1. Cette variante de réalisation consiste en ce que le passage vertical 15 du bloc de protection différentielle de la figure 1 est remplacé par un certain nombre de passages verticaux 15A, 15B, 15C, 15D qui sont disposés en correspondance avec les orifices 7 du disjoncteur 1. Ainsi, chaque câble 24 passe dans un passage vertical individuel et le câble est mieux guidé dans un tel passage individuel. Le transformateur totalisateur 11 entoure l'ensemble formé par ces différents passages verticaux 15A à 15D, comme pour le premier mode de réalisation de la figure 1.In Figures 2 and 3, the differential protection block is configured according to an alternative embodiment with respect to the differential protection block of the figure 1. This alternative embodiment consists in that the vertical passage 15 of the block of differential protection of figure 1 is replaced by a number of passages vertical 15A, 15B, 15C, 15D which are arranged in correspondence with the orifices 7 of the circuit breaker 1. Thus, each cable 24 passes through an individual vertical passage and the cable is better guided in such an individual passage. The totalizing transformer 11 surrounds the assembly formed by these different vertical passages 15A to 15D, as for the first embodiment of FIG. 1.

    Sur la figure 5, on a représenté une autre variante de réalisation de l'invention dans laquelle le boítier 12 du bloc de protection différentielle 10 n'est pas formé en une seule pièce, comme pour les modes de réalisation des figures 1 à 3, mais il est formé en deux pièces séparées 12A et 12B. Le boítier 12A correspond sensiblement à la branche 17 du premier mode de réalisation et le boítier 12B correspond sensiblement à la branche 13 du premier mode de réalisation. Des éléments de fixation amovible sont prévus sur les deux boítiers séparés 12A et 12B de façon à ce que le boítier 12B puisse être fixé indifféremment soit sur la face supérieure 30 du boítier 12A (comme cela est représenté sur la partie gauche de la figure 5), soit sur la face inférieure 31 du boítier 12A (comme cela est représenté sur la partie droite de la figure 5). Cette variante de réalisation permet de pouvoir utiliser les mêmes pièces formant le boítier 12 du bloc de protection différentielle selon l'invention pour soit constituer un bloc de protection différentielle destiné à venir mesurer les courants différentiels au niveau des câbles d'arrivée d'un disjoncteur, soit constituer un bloc de protection différentielle destiné à venir mesurer les courants différentiels au niveau du câble de départ du disjoncteur.In FIG. 5, another alternative embodiment of the invention in which the housing 12 of the differential protection block 10 is not formed in one piece, as for the embodiments of FIGS. 1 to 3, but it is formed in two separate pieces 12A and 12B. Box 12A corresponds substantially to branch 17 of the first embodiment and the housing 12B corresponds substantially to branch 13 of the first embodiment. Of removable fastening elements are provided on the two separate housings 12A and 12B of so that the housing 12B can be fixed either on the face upper 30 of the housing 12A (as shown on the left side of the Figure 5), either on the underside 31 of the housing 12A (as shown in the right part of figure 5). This alternative embodiment makes it possible to be able to use the same parts forming the housing 12 of the differential protection block according to the invention to either constitute a differential protection block intended to come measure the differential currents at the supply cables of a circuit breaker, i.e. constitute a differential protection block intended to measure the currents differential at the circuit breaker feeder cable.

    Claims (4)

    1. A differential protection unit (10) able to be fitted onto an electrical circuit breaker (1), said electrical circuit breaker (1) being of appreciably parallelepipedic shape and including:
      a circuit breaker tripping mechanism,
      a first side face (6) including a horizontal row of orifices (7) for connection to terminals, and
      a second side face (4), perpendicular to the first face (6);
      said unit (10) including, in a case (12):
      a summing transformer (11) comprising a magnetic toroid and a secondary winding able to deliver a signal and
      a trip relay controlled by said signal and serving the purpose of operating the tripping mechanism of the circuit breaker (1);
      characterized in that:
      said case (12) of the differential protection unit comprises two perpendicular branches (13, 17) both of which are of appreciably parallelepipedic shape ;
      a first branch (13) which bears against said first face (6) of the circuit breaker case, which contains the toroid of vertical axis and which presents at least one vertical passage from end to end (15) so as to create an unavoidable path through said toroid when connection of the cables (24) to the terminals is performed ; and
      a second branch (17) which bears against the second face (4) of the circuit breaker case and which contains the trip relay.
    2. The differential protection unit according to claim 1, characterized in that the first branch (13) and the second branch (17) are formed by separate cases (12B, 12A) so that the separate case (12B) constituting the first branch can be fixed either on an upper face (30) of the case (12A) constituting the second branch or on a lower face (31) of the case (12A) constituting the second branch.
    3. The differential protection unit according to either one of the foregoing claims, characterized in that said vertical passage (15) is formed by several passages (15A to 15D) arranged in correspondence with the orifices (7) of the circuit breaker (1).
    4. The differential protection unit according to any one of the foregoing claims, characterized in that the first branch comprises in addition protruding connecting strips, designed to engage via the orifices in the terminals, and designed to provide the electrical power supply of the differential protection unit.
    EP19940410091 1993-10-18 1994-10-13 Differential protection block with cable passage Expired - Lifetime EP0649158B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9312479A FR2711449B1 (en) 1993-10-18 1993-10-18 Differential protection block with cable passage.
    FR9312479 1993-10-18

    Publications (2)

    Publication Number Publication Date
    EP0649158A1 EP0649158A1 (en) 1995-04-19
    EP0649158B1 true EP0649158B1 (en) 1999-09-29

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    Application Number Title Priority Date Filing Date
    EP19940410091 Expired - Lifetime EP0649158B1 (en) 1993-10-18 1994-10-13 Differential protection block with cable passage

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    Country Link
    EP (1) EP0649158B1 (en)
    DE (1) DE69420923T2 (en)
    ES (1) ES2139055T3 (en)
    FR (1) FR2711449B1 (en)

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    Also Published As

    Publication number Publication date
    FR2711449A1 (en) 1995-04-28
    EP0649158A1 (en) 1995-04-19
    FR2711449B1 (en) 1995-12-22
    DE69420923D1 (en) 1999-11-04
    DE69420923T2 (en) 2000-05-04
    ES2139055T3 (en) 2000-02-01

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