EP1953779B1 - Quick-locking fuse circuit breaker - Google Patents

Quick-locking fuse circuit breaker Download PDF

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Publication number
EP1953779B1
EP1953779B1 EP08356019A EP08356019A EP1953779B1 EP 1953779 B1 EP1953779 B1 EP 1953779B1 EP 08356019 A EP08356019 A EP 08356019A EP 08356019 A EP08356019 A EP 08356019A EP 1953779 B1 EP1953779 B1 EP 1953779B1
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EP
European Patent Office
Prior art keywords
insert
fuse
breaker
circuit
cavity
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.)
Active
Application number
EP08356019A
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German (de)
French (fr)
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EP1953779A1 (en
Inventor
Véronique Adam
Jean-Luc Birant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mersen France SB SAS
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Mersen France SB SAS
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Publication date
Application filed by Mersen France SB SAS filed Critical Mersen France SB SAS
Priority to PL08356019T priority Critical patent/PL1953779T3/en
Publication of EP1953779A1 publication Critical patent/EP1953779A1/en
Application granted granted Critical
Publication of EP1953779B1 publication Critical patent/EP1953779B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/104—Adaptation for built-in fuses with interlocking mechanism between switch and fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts

Definitions

  • the invention relates to an electrical circuit-disconnector switch adapted to receive a protection fuse.
  • a switch-disconnector performs the function of switch by allowing to cut and restore the passage of electric current in the circuit on which it is mounted.
  • a switch-disconnector can also isolate a section of power line to allow access to it without danger of inadvertent restoration of the passage of electric current by manipulation of the switch.
  • the function of the disconnector is to prevent any current flow in the switch even in case of overvoltage.
  • switch-disconnector when such a switch-disconnector is provided with a fuse, it protects the electrical circuit against possible short circuit or electrical overload.
  • EP-A-0 584 587 discloses a fuse switch-disconnector adapted to perform these functions properly and which comprises a housing having at its ends two terminals for its connection to two sections of power lines. To fulfill its switch function, this switch-disconnector is equipped with a switching device comprising, in particular, a removable contact plate under the effect of a handle pivoting about an axis. In its middle part, the housing defines a cavity adapted to receive an insert carrying a fuse. This cavity has, in its upper part, an opening through which can be introduced the fuse insert, when the opening is not covered by the handle, as in the case of the figure 3 of EP-A-0 584 587 .
  • the fuse insert When inserted into the cavity in the engaged position, the fuse insert electrically connects the terminals to each other while fulfilling the protection function of the circuit. Conversely, when the fuse insert is removed from the cavity, the switch is open, the electrical contact between the terminals can not be established and the switch-disconnector then performs its function of disconnector.
  • the fuse insert is screwed into the cavity until the support of a movable contact bridge on a contact electrically connected to one of the terminals.
  • a pawl is folded by a torsion spring against the fuse insert, so as to emit a loud noise. the engagement of the fuse insert at the bottom of the cavity.
  • the ratchet prevents folding the handle to close the switching device as long as the contact plate and the contact are disjointed.
  • US-3,474,373 discloses a power line disconnect switch comprising a housing with two terminals and a switch for cutting and restoring current flow.
  • the housing defines an open cavity for receiving a fuse insert.
  • the two lugs for fixing the insert in the cavity do not allow simple or effective locking of the insert in the housing. Indeed, the movement of the insert is not precisely guided and there is no specific means to ensure its maintenance in the contact position.
  • the present invention aims to overcome these disadvantages by providing a switch-disconnector where we can set up the fuse insert in a simple, fast and certain.
  • the invention relates to an electrical line-disconnector comprising a housing having two terminals, able to receive sections of power lines, and a switching device adapted to cut and restore the passage of a current. between the terminals, the housing defining an open cavity and being able to receive a fuse insert, the cavity being defined, near its opening, by a wall integral with the housing and intended to guide the fuse insert towards the cavity, the housing comprising a first contact member, positioned at the bottom of the cavity and electrically connected to one of the terminals, and a second contact member positioned between the opening and the first contact member and electrically connected to the other terminal, characterized in that it comprises means for rapidly locking the fuse insert by screwing the fuse insert limited to a partial revolution angle of less than or equal to 270 °, the fuse insert being able to connect electrically the first and second contact members when in the locked position, and in that the locking means comprise at least one lug integral with the fuse insert and at least one receiving groove of said lug, in that the wall has a generally cylindrical
  • the fuse allows the passage of current when the insert is locked in the housing by a short screw, quarter-turn type or equivalent.
  • the grooves with helical ramps allow precise guidance of the movement of the insert in the cavity and the recessed seat terminating one of these ramps ensures a firm hold of the insert in the cavity, so its locking in the housing.
  • the switch-disconnector illustrated by the figure 1 comprises a housing 1 generally shaped parallelepiped right, whose longitudinal ends along the X axis of an orthogonal coordinate system XYZ respectively accommodate an upstream terminal 2 and a downstream terminal 3.
  • the terms upstream and downstream are chosen by reference to the arbitrary direction of a current likely to pass through the switch-disconnector and symbolized by an arrow I on the Figures 1 to 3 , 5 and 7 .
  • On the figure 1 only one half 1A of the housing 1 is shown in solid lines to better visualize its internal composition. His other half 1B is represented, at the figure 1 , by its trace in phantom, and at the figure 7 in perspective.
  • the terminals 2 and 3 are fixedly mounted relative to the housing 1 and each cooperate with a contact screw 2A or 3A capable of compressing one or two termination (s) of electrical line (s) L 2 and L 3 , shown in phantom, within a housing 2B or 3B.
  • a contact screw 2A or 3A capable of compressing one or two termination (s) of electrical line (s) L 2 and L 3 , shown in phantom, within a housing 2B or 3B.
  • the terminations of sections L 2 and L 3 are respectively brought into contact with an upstream contact strip 4 and a downstream contact strip 5.
  • the housing 1 defines a cavity 10 able to receive an insert 20 having a fuse 21.
  • the latter has an upper opening 9.
  • the terms upper and lower, top and bottom or horizontal and vertical are used here with reference to the position of the switch-disconnector shown on the Figures 1 to 3 and 7 and an ascending vertical axis Z.
  • the downstream part of the housing 1 houses a switching device intended to fulfill the function of switch, that is to say to cut or restore the passage of the current I in the power line.
  • the switching device comprises in particular a handle 8A pivotally mounted relative to the housing 1 about an axis Y 8 -Y ' 8 parallel to the axis Y.
  • the handle 8A makes it possible to interrupt the passage of the current I acting on a lever 8B represented only at figure 7 which slides down a contact bridge 7 so as to separate it from the downstream lamella 5 and an intermediate lamella 6.
  • Figures 1 to 3 the handle 8A is shown in the open position of the circuit.
  • the arrow symbolizing the current I is therefore represented in dotted lines, because the current I does not pass.
  • a spring 7A exerts a vertical ascending force of return of the bridge 7 to the lamellae 5 and 6.
  • the intermediate strip 6 is positioned at the bottom of the cavity 10.
  • the strip 6 is mounted movably relative to the housing 1 substantially along the Z axis. In this case, it can slide downwards when it is pushed by the fuse. 21 arriving at the bottom of the cavity 10 and is pushed towards the opening 9 by the restoring force exerted by an elastic member 6A, when the insert 20 is extracted from the cavity 10.
  • the elastic member of return is constituted by a spring 6A.
  • the cavity 10 is defined by a generally cylindrical wall 11 made in the casing 1 or in a part integral with the casing 1.
  • the wall 11 is intended to guide the insert 20 with a functional clearance, during its introduction into the cavity 10.
  • the wall 11 has a shape composed of a circular cylinder adjacent to a triangular prism and extending along an axis Z 11 -Z '11 parallel to the axis Z.
  • the wall 11 comprises a portion 11A in the form of a portion of a cylinder formed in the housing half 1A 1, as well as another half-cylinder shaped portion 11 B in the half 1 B.
  • the base of the wall 11 is defined by the disc-shaped aperture 9, a quarter of which is extended by a region 19.
  • the triangular region 19 is here in shape of isosceles triangle bounded by two walls 11A1 and 11A2 planar, parallel to the axis Z 11 -Z '11 and visible in particular in figure 5 .
  • the switch-disconnector comprises two grooves 12 and 13 each having a ramp 12A or 13A of helical shape.
  • These helical ramps 12A and 13A each extend over a portion of the wall 11 limited to an angle ⁇ of the order of 95 ° visible on the figure 5 .
  • This angle ⁇ corresponds to a revolution of about a quarter turn, so that it is between 85 ° and 105 °.
  • Each groove 12 or 13 opens into the upper part of the opening 9 via a groove 14 or 15 straight and parallel to the axis Z 11 -Z '11. In the lower part, the groove 13 ends with a seat 18 of rectangular profile.
  • the junction between the helical ramp 13A and the seat 18 is formed by a flat 16 followed by a short end ramp 17 leading to the seat 18 and directed upwards, unlike the helical ramp 13A.
  • the pitch of the helix defining the helical ramps is determined to obtain a vertical travel C in the range of 2 to 6 mm and in this case being 3.5 mm.
  • the removal of the seat 18, that is to say the vertical distance d separating the flat 16 from the top of the seat 18, may be of the order of 1 mm.
  • each groove 12 or 13 has a helical ramp 12A, then a flat 16.
  • the orthogonal section of each groove 12 or 13 is rectangular.
  • the groove 12 does not have a seat, but merely opens into the prismatic volume defined by the opening 19 and the axis Z 11 -Z '11. Nevertheless, the groove 12 could also have a seat, depending on the selected geometries for the housing and for the insert.
  • the grooves 12 and 13 are thus able to guide each lug 23 or 24 integral with the fuse insert 21.
  • the pins 23 and 24 are arranged diametrically opposite with respect to an axis Z 20 -Z '20 that the insert 20 extends.
  • Ramps 12A and 13A rely on a dextral helix.
  • the pitch they constitute is therefore oriented to the right. Therefore, to be introduced into the cavity 10 or to be extracted, the insert 20 must be respectively screwed or unscrewed by a quarter turn.
  • the inner or lower end of the groove 12 flares to form the seat 18, the top 18A is located, relative to the bottom of the housing 1 opposite the opening 9, at an altitude greater than that of the point the lower 13D of ramp 13A.
  • the internal and external adjectives are used with reference to the cavity 10 and the housing 1. In other words, the vertex 18A is recessed upwards with respect to the extreme internal point of the ramp 13A of the groove 13.
  • the lug 23 is housed within the seat 18 in which it is held by the spring 6A which exerts a vertical upward force on the insert 20 by the intermediate contact 6.
  • the grooves 12 and 13, the lugs 23 and 24 and the spring 6A thus constitute rapid locking means, by quarter-turn screwing, the insert 20 in the housing 1.
  • the lower pole 21A of the fuse 21 touches the strip 6. It can then be electrically connected to the downstream strip 4 in the case where the bridge 7 establishes the interconnection after switching to the closed position of the controller 8A and lever 8B.
  • the insert 20 has a cap 22 of electrically insulating material holding the fuse 21 removably. Indeed, when the fuse 21 has melted after protecting the power line against a short circuit or an electrical overload, the cartridge must be removed and replaced to restore the passage of the current I in the power line.
  • the upper portion of the fuse 21 may be encased by resilient mount within a non-illustrated receiving zone of the cap 22.
  • the fuse 21 and its cap 22 extend along the axis Z 20 -Z '20 which is parallel to the axis Z when the insert 20 is introduced into the cavity 10.
  • the cap 22 has a generally cylindrical outer surface 22A with a circular base, so as to be guided by the wall 11.
  • the insert 20 carries the two lugs 23 and 24 projecting relative to the cap 22 and diametrically opposed with respect to the axis Z 20 -Z '20, which allows them to engage simultaneously in the helical ramps 12A and 13A.
  • the insert 20 further has a contact tab 25 made of an electrically conductive material.
  • the tab 25 extends in a plane perpendicular to the axis Z 20 -Z '20 projecting relative to the outer surface of the insert 20.
  • the tongue 25 is oriented at an angle ⁇ of about 45 ° with respect to the diametral axis connecting the lugs 23 and 24.
  • the piece 26 forming the tongue 25 is folded and arranged in the cap 22 so as to come into contact with the upper pole 21 B visible at the figure 8 fuse 21 when covered by the cap 22.
  • the lower pole 21A of the fuse 21 is capable of being electrically connected to the downstream terminal 3 and the upper pole of the fuse 21 to the upstream terminal 2.
  • the upstream lamella 4 comprises a flat portion 4A extending near the cavity 10 and in the form of rectangle sectioned at quarter by a circular segment. In the vertical direction, the portion 4A is located between the lamella 6 and the opening 9. More specifically, the portion 4A is at an altitude lower than those of the bottom of the wall 11 and grooves 12 and 13.
  • the geometry and the position of the portion 4A are determined so as to make contact with the tongue 25, when the insert 20 is introduced into the cavity 10 and its lugs 23 and 24 are screwed fully into the grooves 12 and 13. respectively into the seat 18 and the triangular prism.
  • the end of the portion 4A is cantilevered in the periphery of the cavity 10 and has a substantially cylindrical shape inscribed on the imaginary extension of the cylinder forming the wall 11. Such a shape does not therefore not an obstacle to the introduction of the insert 20 nor, in particular, to the passage of the cap 22 and the tongue 25.
  • the dimensions of the tongue 25 and the corresponding portion 4A are selected according to the thermal rating of the switch-disconnector, that is to say in order to obtain an area and a section sufficient for the passage of the current without risking deterioration of the parts in contact.
  • the housing 1 comprises a protective rib 10A positioned to cover the upper and inner faces of the portion 4A.
  • a rib 10A is made of electrically insulating material and is integral with the housing 1. It allows to hide the portion 4A to prevent accidental contact with the finger of an operator passing through the opening 9, for the case where the upstream section L 2 of the power line is directly connected to a current generator maintained under tension.
  • the housing 1 has a second protective rib 10C disposed parallel to the rib 10A and below, so as to prevent accidental contact between the portion 4A and the finger folding upward of an operator.
  • the portion 4A and the rib 10C provide a space 10B adapted to accommodate the tongue 25.
  • the insert 20 is in the locked position symbolized by the letter F to the figure 5 and corresponding to the position illustrated by the figure 3 , the tongue 25 is thus framed above and below by the portion 4A and the ribs 10A and 10C.
  • the ribs 10A and 10C may for example consist of horizontal wings molded from one of the side walls of the casing 1 into the cavity 10.
  • the insert 20 To set up the insert 20 with its fuse 21 in the cavity 10, it must be screwed into the housing 1 in a quarter-turn revolution to bring the tongue 25 in contact with the portion 4A. For this, it is first necessary to present, facing the opening 9, the lower part of the fuse 21, then introduce it into the generally cylindrical volume defined by the wall 11. It is then necessary to present the tongue 25 opposite of the corresponding triangular region 19 of the opening 9. The tongue 25 is then in the open or sectioned position symbolized by the letter O to the figure 5 , corresponding to the position illustrated by the figure 2 .
  • the presence of the tongue 25 protruding from the outer face of the insert 20 is a keying means imposing a single mounting direction of the insert 20 in the housing 1.
  • the tongue 25 has an area smaller than that of the opening or region 19.
  • the lugs 23 and 24 are then respectively engaged in the input grooves 14 and 15 before approaching the helical ramps 12A and 13A.
  • the operator must then turn the insert 20 to print a helical movement, in the direction of the arrow H to the figure 3 , guided by the grooves 12 and 13. During this movement H, the insert 20 accostes the intermediate contact 6 through the lower pole 21A. The contact 6 thus constitutes the first electrical contact member touched by the insert 20.
  • the pins 23 and 24 s engage the flats 16 by which the movement of the insert 20 becomes a pure revolution, without translation.
  • the flats 16 correspond to the lowest points reached by the pins 23 and 24, where the spring 6A is the most compressed.
  • the tongue 25 is placed opposite the portion 4A of the upstream lamella 4.
  • the insert 20 back slightly, so that the tongue 25 accosts the lower face of the portion 4A thus establishing the electrical conduction between the upper pole 21 B of the fuse 21 and the upstream lamella 4.
  • the latter is therefore chronologically the second electrical contact member touched by the insert 20.
  • the spring 6A then exerts a force directed upwards on the blade 6, so on the lower pole 21A.
  • the fuse 21 transmits this force to the tongue 25 which is kept in contact with the portion 4A by a pressure ensuring a large electrical interface area, thus minimizing the heating of the conductive parts.
  • the spring 6A is not intended to exert the force on the lugs 23 and 24, which, in this case, remain free from mechanical stresses when they occupy their respective end positions within the grooves 13 and 12.
  • the lugs 23 and 24 thus float at the seat 18 and the triangular prismatic volume.
  • the fuse 21 electrically connects the first member 6 to the second member 4.
  • the handle 8A is folded down on the housing 1 thus closing the electrical circuit, the lamella 6 is electrically connected to the downstream lamella 5 via the bridge 7, which allows the passage of the current I through the switch-disconnector.
  • the operator When the operator wishes to isolate the electrical line where the switch-disconnector is mounted, he must first raise the handle 8A cutting the current I so as to access the insert 20. It must then unscrew a quarter- de-turn the insert 20 to extract it from the cavity 10.
  • the upper part of the cap 22 has two gripping zones 22B and 22C symmetrical with respect to the median vertical plane and thanks to which the operator can grasp and manipulate the insert 20. When the latter is removed from the cavity 10, the electrical line L 2 -L 3 on which is mounted the switch-disconnector is effectively isolated, without risk of inadvertent recovery of the current I.
  • the operator can, if necessary, replace the fuse 21.
  • the elastic attachment of the latter in the receptacle of the cap 22 can be achieved by means of a contact strip folded so as to comply with a substantial portion of the inner circumference of the receptacle of the cap 22.
  • the lamella may be overmoulded, welded or hooked by wedging in the cap 22.
  • the upper face 22D of the cap 22 has a symmetrical geometry with respect to the vertical median plane.
  • This face 22D globally shaped horizontal rectangle can thus be aligned by the operator facing a fixed reference 1C provided on the housing 1 to testify to certain manner of the actual and complete introduction of the insert 20 in the locked position F in the cavity 10.
  • the operator visually observes that the contact is established by the fuse 21 when it has aligned the 22D face and 1C mark, without the need to hear a click.
  • the introduction of the insert 20 is therefore particularly fast and intuitive for an operator. This is an essential advantage when the operator has to set up a large number of fuse inserts.
  • the switch-disconnector may comprise a not shown locking device preventing the operator from folding the handle 8A in the closed position when the contact is not established, that is to say when the insert 20 to fuse 21 is not itself in closed position F.
  • This locking device can be constructed in a manner similar to that described by EP-A-0 584 587 , with pallet and torsion spring and adapted to the configuration of the object of the invention.
  • the bottom of the cavity 10 may also be provided with a locking system for immovably retaining a polarizing washer whose inner diameter corresponds to the external dimensions of the lower pole 21A of a fuse 21 adapted to the thermal caliber devolved to the switch-disconnector, as described EP-A-0 584 587 .
  • the contact strips 6, on the one hand, and 4 and 5, on the other hand, are formed by blades bent respectively in ⁇ and in Z right.
  • these contacts may have different numbers or geometries, without departing from the scope of this invention.

Description

L'invention a trait à un interrupteur-sectionneur de circuit électrique apte à recevoir un fusible de protection.The invention relates to an electrical circuit-disconnector switch adapted to receive a protection fuse.

Par définition, un interrupteur-sectionneur remplit la fonction d'interrupteur en permettant de couper et de rétablir le passage du courant électrique dans le circuit sur lequel il est monté. Un interrupteur-sectionneur peut également isoler une section de ligne électrique pour permettre d'y accéder sans danger de rétablissement intempestif du passage du courant électrique par manipulation de l'interrupteur. La fonction de sectionneur consiste à empêcher tout passage du courant dans l'interrupteur même en cas de surtension. De plus, lorsqu'un tel interrupteur-sectionneur est muni d'un fusible, il permet de protéger le circuit électrique contre d'éventuels courts-circuits ou surcharges électriques.By definition, a switch-disconnector performs the function of switch by allowing to cut and restore the passage of electric current in the circuit on which it is mounted. A switch-disconnector can also isolate a section of power line to allow access to it without danger of inadvertent restoration of the passage of electric current by manipulation of the switch. The function of the disconnector is to prevent any current flow in the switch even in case of overvoltage. In addition, when such a switch-disconnector is provided with a fuse, it protects the electrical circuit against possible short circuit or electrical overload.

EP-A-0 584 587 décrit un interrupteur-sectionneur à fusible apte à remplir correctement ces différentes fonctions et qui comprend un boîtier présentant à ses extrémités deux bornes pour sa connexion à deux sections de lignes électriques. Pour remplir sa fonction d'interrupteur, cet interrupteur-sectionneur est équipé d'un dispositif de commutation comprenant, notamment, une plaque de contact amovible sous l'effet d'une manette pivotante autour d'un axe. Dans sa partie médiane, le boîtier définit une cavité apte à recevoir un insert portant un fusible. Cette cavité présente, dans sa partie supérieure, une ouverture par laquelle peut être introduit l'insert à fusible, lorsque l'ouverture n'est pas recouverte par la manette, comme dans le cas de la figure 3 de EP-A-0 584 587 . EP-A-0 584 587 discloses a fuse switch-disconnector adapted to perform these functions properly and which comprises a housing having at its ends two terminals for its connection to two sections of power lines. To fulfill its switch function, this switch-disconnector is equipped with a switching device comprising, in particular, a removable contact plate under the effect of a handle pivoting about an axis. In its middle part, the housing defines a cavity adapted to receive an insert carrying a fuse. This cavity has, in its upper part, an opening through which can be introduced the fuse insert, when the opening is not covered by the handle, as in the case of the figure 3 of EP-A-0 584 587 .

Lorsqu'il est introduit dans la cavité en position d'enclenchement, l'insert à fusible relie électriquement les bornes entre elles, tout en remplissant la fonction de protection du circuit. A l'inverse, lorsque l'insert à fusible est ôté de la cavité, l'interrupteur est ouvert, le contact électrique entre les bornes ne peut pas être établi et l'interrupteur-sectionneur remplit alors sa fonction de sectionneur.When inserted into the cavity in the engaged position, the fuse insert electrically connects the terminals to each other while fulfilling the protection function of the circuit. Conversely, when the fuse insert is removed from the cavity, the switch is open, the electrical contact between the terminals can not be established and the switch-disconnector then performs its function of disconnector.

Pour atteindre sa position d'enclenchement du contact électrique, l'insert à fusible est vissé dans la cavité jusqu'à l'appui d'un pont de contact mobile sur un contact électriquement relié à l'une des bornes. Afin de déterminer si la position d'enclenchement est atteinte, c'est-à-dire si le contact électrique est effectivement établi, un cliquet est rabattu par un ressort de torsion contre l'insert à fusible, de façon à émettre un bruit témoignant de l'enclenchement de l'insert à fusible au fond de la cavité. De plus, le cliquet empêche de rabattre la manette pour fermer le dispositif de commutation tant que la plaque de contact et le contact sont disjoints.To reach its position of engagement of the electrical contact, the fuse insert is screwed into the cavity until the support of a movable contact bridge on a contact electrically connected to one of the terminals. In order to determine whether the engagement position is achieved, i.e. if the electrical contact is actually established, a pawl is folded by a torsion spring against the fuse insert, so as to emit a loud noise. the engagement of the fuse insert at the bottom of the cavity. In addition, the ratchet prevents folding the handle to close the switching device as long as the contact plate and the contact are disjointed.

L'interrupteur-sectionneur décrit dans EP-A-0 584 587 présente néanmoins des inconvénients qui en limitent les performances. En effet, le vissage et le dévissage de l'insert à fusible nécessitent des gestes précis et s'avèrent relativement longs, puisqu'il faut visser jusqu'à atteindre la position d'enclenchement du cliquet.The switch-disconnector described in EP-A-0 584 587 nevertheless has drawbacks which limit its performance. Indeed, the screwing and unscrewing of the fuse insert require precise gestures and are relatively long, since it is necessary to screw up to reach the engagement position of the pawl.

En outre, il est nécessaire de maîtriser avec précision les dimensions des filetages et de lubrifier les filetages pour minimiser l'effort de serrage. Par ailleurs, il n'est pas aisé pour un opérateur de déterminer rapidement si l'insert à fusible est ou non suffisamment vissé pour établir le contact électrique. En effet, le bruit émis par le cliquet heurtant l'insert à fusible est difficilement audible, en particulier dans un environnement industriel bruyant.In addition, it is necessary to precisely control the dimensions of the threads and to lubricate the threads to minimize the clamping force. Furthermore, it is not easy for an operator to quickly determine if the fuse insert is or not sufficiently screwed to establish the electrical contact. Indeed, the noise emitted by the pawl striking the fuse insert is difficult to hear, especially in a noisy industrial environment.

US-3 474 373 décrit un interrupteur-sectionneur de ligne électrique comprenant un boîtier avec deux bornes et un commutateur pour couper et rétablir le passage du courant. Le boîtier définit une cavité ouverte pour recevoir un insert à fusibles. Les deux ergots pour la fixation de l'insert dans la cavité ne permettent pas un verrouillage simple ni efficace de l'insert dans le boîtier. En effet, le mouvement de l'insert n'est pas guidé de façon précise et il n'est pas prévu de moyens spécifiques pour assurer son maintien en position de contact. US-3,474,373 discloses a power line disconnect switch comprising a housing with two terminals and a switch for cutting and restoring current flow. The housing defines an open cavity for receiving a fuse insert. The two lugs for fixing the insert in the cavity do not allow simple or effective locking of the insert in the housing. Indeed, the movement of the insert is not precisely guided and there is no specific means to ensure its maintenance in the contact position.

La présente invention vise notamment à remédier à ces inconvénients en proposant un interrupteur-sectionneur où l'on peut mettre en place l'insert à fusible de manière simple, rapide et certaine.The present invention aims to overcome these disadvantages by providing a switch-disconnector where we can set up the fuse insert in a simple, fast and certain.

A cet effet, l'invention concerne un interrupteur-sectionneur de ligne électrique comprenant un boîtier comportant deux bornes, aptes à recevoir des sections de lignes électriques, ainsi qu'un dispositif de commutation apte à couper et à rétablir le passage d'un courant électrique entre les bornes, le boîtier définissant une cavité ouverte et étant apte à recevoir un insert à fusible, la cavité étant définie, près de son ouverture, par une paroi solidaire du boîtier et destinée à guider l'insert à fusible vers la cavité, le boîtier comportant un premier organe de contact, positionné au fond de la cavité et relié électriquement à l'une des bornes, ainsi qu'un deuxième organe de contact positionné entre l'ouverture et le premier organe de contact et relié électriquement à l'autre borne,
caractérisé en ce qu'il comprend des moyens de verrouillage rapide de l'insert à fusible par vissage de l'insert à fusible limité à une révolution partielle d'angle inférieur ou égal à 270°, l'insert à fusible étant apte à relier électriquement les premier et deuxième organes de contact lorsqu'il est en position verrouillée, et en ce que les moyens de verrouillage comportent au moins un ergot solidaire de l'insert à fusible et au moins une rainure de réception dudit ergot, en ce que la paroi présente une forme globalement cylindrique à base partiellement circulaire et les moyens de verrouillage rapide comprennent deux ergots et deux rainures comportant chacune une rampe hélicoïdale s'étendant sur une partie limitée de la paroi et débouchant au niveau de l'ouverture de la cavité, chaque rainure étant apte à guider l'un des ergots lors de son introduction dans la cavité, au moins l'une des rainures se terminant par un siège présentant un retrait vers l'ouverture par rapport à la rampe correspondante et contre lequel est maintenu l'ergot correspondant au moyen d'un organe élastique exerçant un effort tendant à repousser l'insert à fusible selon l'axe de la paroi et en direction de l'ouverture.For this purpose, the invention relates to an electrical line-disconnector comprising a housing having two terminals, able to receive sections of power lines, and a switching device adapted to cut and restore the passage of a current. between the terminals, the housing defining an open cavity and being able to receive a fuse insert, the cavity being defined, near its opening, by a wall integral with the housing and intended to guide the fuse insert towards the cavity, the housing comprising a first contact member, positioned at the bottom of the cavity and electrically connected to one of the terminals, and a second contact member positioned between the opening and the first contact member and electrically connected to the other terminal,
characterized in that it comprises means for rapidly locking the fuse insert by screwing the fuse insert limited to a partial revolution angle of less than or equal to 270 °, the fuse insert being able to connect electrically the first and second contact members when in the locked position, and in that the locking means comprise at least one lug integral with the fuse insert and at least one receiving groove of said lug, in that the wall has a generally cylindrical shape with a partially circular base and the rapid locking means comprise two lugs and two grooves each comprising a helical ramp extending over a limited portion of the wall and opening at the opening of the cavity, each groove being adapted to guide one of the lugs during its introduction into the cavity, at least one of the grooves ending in a seat with a withdrawal towards the open opening relative to the corresponding ramp and against which is held the corresponding pin by means of an elastic member exerting a force tending to push the fuse insert along the axis of the wall and towards the opening.

En d'autres termes, le fusible permet le passage du courant lorsque l'insert est verrouillé dans le boîtier par un vissage bref, de type quart-de-tour ou équivalent. Les rainures à rampes hélicoïdales permettent un guidage précis du mouvement de l'insert dans la cavité et le siège en retrait terminant l'une de ces rampes assure un maintien ferme de l'insert dans la cavité, donc son verrouillage dans le boîtier.In other words, the fuse allows the passage of current when the insert is locked in the housing by a short screw, quarter-turn type or equivalent. The grooves with helical ramps allow precise guidance of the movement of the insert in the cavity and the recessed seat terminating one of these ramps ensures a firm hold of the insert in the cavity, so its locking in the housing.

Selon d'autres caractéristiques avantageuses de l'invention :

  • le deuxième organe de contact est monté fixe entre le premier organe de contact et les rainures, et l'insert à fusible présente une languette en matériau électriquement conducteur connectée au fusible et apte à entrer en contact avec le deuxième organe de contact lorsque l'insert à fusible est en position verrouillée ;
  • chaque rainure présente un méplat prolongeant la rampe ;
  • le deuxième organe de contact est agencé sur la périphérie de la cavité et l'interrupteur-sectionneur comprend au moins une nervure de protection réalisée en matériau électriquement isolant et recouvrant partiellement le deuxième organe de contact ;
  • il comprend deux nervures de protection globalement planes et parallèles entre elles et le deuxième organe de contact comprend une portion destinée à établir le contact avec la languette et positionnée entre les deux nervures de façon à définir un logement pour la languette ;
  • le pas de vis des rampes est orienté à droite et les deux rainures s'étendent de façon sensiblement symétrique par rapport à l'axe de la paroi ;
  • la partie de la paroi est limitée à un angle compris entre 85° et 105°, de façon à réaliser une révolution partielle sur environ un quart-de-tour ;
  • la partie de la paroi est limitée à un angle compris entre 160° et 200°, de façon à réaliser une révolution partielle sur environ un demi-tour ;
  • le pas de l'hélice est déterminé de sorte que la hauteur de l'hélice selon l'axe de la paroi est comprise entre 2 et 6 mm ;
  • chaque rampe débouche sur l'ouverture par l'intermédiaire d'une rainure rectiligne et parallèle à l'axe de la paroi ;
  • l'insert à fusible comporte un capuchon présentant une surface externe de forme cylindrique à base circulaire d'où s'étendent les ergots, le capuchon présentant un moyen de repérage symétrique par rapport à un plan comprenant l'axe de la surface externe et le boîtier comporte un repère fixe positionné de manière à témoigner de la position verrouillée de l'insert à fusible dans le boîtier par son alignement avec le moyen de repérage ;
  • l'ouverture est en forme de disque co-axial à l'axe de la paroi prolongé par une région délimitée par deux parois, non circulaires et parallèles à l'axe de la paroi, la languette présentant une superficie inférieure à celle de la région et remplissant la fonction de détrompeur lors de l'introduction de l'insert à fusible dans la cavité.
According to other advantageous features of the invention:
  • the second contact member is fixedly mounted between the first contact member and the grooves, and the fuse insert has a tab of electrically conductive material connected to the fuse and adapted to come into contact with the second contact member when the insert fuse is in the locked position;
  • each groove has a flat extending the ramp;
  • the second contact member is arranged on the periphery of the cavity and the switch-disconnector comprises at least one protective rib made of electrically insulating material and partially covering the second contact member;
  • it comprises two generally flat protective ribs parallel to each other and the second contact member comprises a portion intended to make contact with the tongue and positioned between the two ribs so as to define a housing for the tongue;
  • the screw pitch of the ramps is oriented to the right and the two grooves extend substantially symmetrically with respect to the axis of the wall;
  • the part of the wall is limited to an angle between 85 ° and 105 °, so as to achieve a partial revolution about a quarter turn;
  • the portion of the wall is limited to an angle between 160 ° and 200 °, so as to achieve a partial revolution about one half turn;
  • the pitch of the helix is determined so that the height of the helix along the axis of the wall is between 2 and 6 mm;
  • each ramp opens on the opening via a rectilinear groove and parallel to the axis of the wall;
  • the fuse insert comprises a cap having a cylindrical outer surface with a circular base from which the lugs extend, the cap having a means of registration symmetrical with respect to a plane comprising the axis of the outer surface and the housing comprises a fixed marker positioned to testify to the locked position of the fuse insert in the housing by its alignment with the locating means;
  • the opening is in the form of a coaxial disc at the axis of the wall extended by a region delimited by two walls, non-circular and parallel to the axis of the wall, the tongue having an area smaller than that of the region; and performing the keying function when introducing the fuse insert into the cavity.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront aussi à la lumière de la description qui va suivre d'un interrupteur-sectionneur conforme à l'invention, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective partielle d'un interrupteur-sectionneur conforme à l'invention dans une position où le circuit électrique est ouvert et l'insert à fusible retiré ;
  • la figure 2 est une vue en perspective partielle de l'interrupteur-sectionneur de la figure 1 dans une position intermédiaire ;
  • la figure 3 est une vue en perspective de l'interrupteur sectionneur de la figure 1 dans une position où le circuit électrique est ouvert mais où l'insert à fusible est en position de connexion ;
  • la figure 4 est une vue à plus grande échelle d'un détail de l'interrupteur-sectionneur de la figure 1 ;
  • la figure 5 est une vue de dessus de l'interrupteur-sectionneur des figures 1 à 4 dans sa position illustrée par la figure 2 ;
  • la figure 6 est une vue de dessus d'un détail de l'interrupteur-sectionneur ;
  • la figure 7 est une vue en perspective par l'intérieur de la moitié du boîtier de l'interrupteur-sectionneur dont la trace est représentée en traits mixtes sur la figure 1 ;
  • la figure 8 est une vue éclatée de l'insert à fusible.
The invention will be better understood and other advantages thereof will also become apparent in the light of the following description of a switch-disconnector according to the invention, given solely by way of example and with reference to FIGS. drawings in which:
  • the figure 1 is a partial perspective view of a switch-disconnector according to the invention in a position where the electric circuit is open and the fuse insert removed;
  • the figure 2 is a partial perspective view of the switch-disconnector of the figure 1 in an intermediate position;
  • the figure 3 is a perspective view of the disconnect switch of the figure 1 in a position where the electrical circuit is open but the fuse insert is in the connection position;
  • the figure 4 is a larger-scale view of a detail of the switch-disconnector of the figure 1 ;
  • the figure 5 is a top view of the switch-disconnector Figures 1 to 4 in its position illustrated by the figure 2 ;
  • the figure 6 is a top view of a detail of the switch-disconnector;
  • the figure 7 is a perspective view from the inside of the half of the switch-disconnector housing whose trace is shown in phantom on the figure 1 ;
  • the figure 8 is an exploded view of the fuse insert.

L'interrupteur-sectionneur illustré par la figure 1 comprend un boîtier 1 globalement en forme de parallélépipède droit, dont les extrémités longitudinales selon l'axe X d'un repère orthogonal X-Y-Z logent respectivement une borne amont 2 et une borne aval 3. Les termes amont et aval sont choisis par référence au sens arbitraire d'un courant susceptible de transiter dans l'interrupteur-sectionneur et symbolisé par une flèche I sur les figures 1 à 3, 5 et 7. Sur la figure 1, seule une moitié 1A du boîtier 1 est représentée en traits pleins pour mieux visualiser sa composition interne. Son autre moitié 1 B est représentée, à la figure 1, par sa trace en traits mixtes, et à la figure 7 en perspective. Les bornes 2 et 3 sont montées fixes par rapport au boîtier 1 et coopèrent chacune avec une vis de contact 2A ou 3A apte à comprimer une voire deux terminaison(s) de ligne(s) électrique(s) L2 et L3, représentées en traits mixtes, au sein d'un logement 2B ou 3B. Au sein des logements 2B et 3B, les terminaisons des sections L2 et L3 sont mises en contact respectivement avec une lamelle de contact amont 4 et une lamelle de contact aval 5.The switch-disconnector illustrated by the figure 1 comprises a housing 1 generally shaped parallelepiped right, whose longitudinal ends along the X axis of an orthogonal coordinate system XYZ respectively accommodate an upstream terminal 2 and a downstream terminal 3. The terms upstream and downstream are chosen by reference to the arbitrary direction of a current likely to pass through the switch-disconnector and symbolized by an arrow I on the Figures 1 to 3 , 5 and 7 . On the figure 1 only one half 1A of the housing 1 is shown in solid lines to better visualize its internal composition. His other half 1B is represented, at the figure 1 , by its trace in phantom, and at the figure 7 in perspective. The terminals 2 and 3 are fixedly mounted relative to the housing 1 and each cooperate with a contact screw 2A or 3A capable of compressing one or two termination (s) of electrical line (s) L 2 and L 3 , shown in phantom, within a housing 2B or 3B. Within housings 2B and 3B, the terminations of sections L 2 and L 3 are respectively brought into contact with an upstream contact strip 4 and a downstream contact strip 5.

Dans sa partie médiane, le boîtier 1 définit une cavité 10 apte à recevoir un insert 20 comportant un fusible 21. Pour l'introduction de l'insert 20 dans la cavité 10, cette dernière présente une ouverture supérieure 9. Les termes supérieur et inférieur, haut et bas ou horizontal et vertical sont employés ici en référence à la position de l'interrupteur-sectionneur représenté sur les figures 1 à 3 et 7 et à un axe vertical ascendant Z.In its middle part, the housing 1 defines a cavity 10 able to receive an insert 20 having a fuse 21. For the insertion of the insert 20 into the cavity 10, the latter has an upper opening 9. The terms upper and lower, top and bottom or horizontal and vertical are used here with reference to the position of the switch-disconnector shown on the Figures 1 to 3 and 7 and an ascending vertical axis Z.

La partie aval du boîtier 1 loge un dispositif de commutation destiné à remplir la fonction d'interrupteur, c'est-à-dire à couper ou à rétablir le passage du courant I dans la ligne électrique. Le dispositif de commutation comprend notamment une manette 8A montée pivotante par rapport au boîtier 1 autour d'un axe Y8-Y'8 parallèle à l'axe Y. La manette 8A permet d'interrompre le passage du courant I agissant sur un levier 8B représenté uniquement à la figure 7 qui fait coulisser vers le bas un pont de contact 7 de façon à le séparer de la lamelle aval 5 et d'une lamelle intermédiaire 6. Sur les figures 1 à 3, la manette 8A est représentée dans la position d'ouverture du circuit. La flèche symbolisant le courant I est donc représentée en traits pointillés, car le courant I ne passe pas. Un ressort 7A exerce un effort vertical ascendant de rappel du pont 7 vers les lamelles 5 et 6. Ainsi, lorsque la manette 8A est rabattue sur la partie supérieure du boîtier 1, le contact est rétabli et le courant I peut circuler depuis la lamelle intermédiaire 6 vers la lamelle aval 5. Le fonctionnement du dispositif de commutation n'est pas décrit plus en détail ici, car il est semblable à celui décrit par EP-A-0 584 587 .The downstream part of the housing 1 houses a switching device intended to fulfill the function of switch, that is to say to cut or restore the passage of the current I in the power line. The switching device comprises in particular a handle 8A pivotally mounted relative to the housing 1 about an axis Y 8 -Y ' 8 parallel to the axis Y. The handle 8A makes it possible to interrupt the passage of the current I acting on a lever 8B represented only at figure 7 which slides down a contact bridge 7 so as to separate it from the downstream lamella 5 and an intermediate lamella 6. Figures 1 to 3 , the handle 8A is shown in the open position of the circuit. The arrow symbolizing the current I is therefore represented in dotted lines, because the current I does not pass. A spring 7A exerts a vertical ascending force of return of the bridge 7 to the lamellae 5 and 6. Thus, when the handle 8A is folded over the upper part of the casing 1, the contact is restored and the current I can flow from the intermediate lamella 6 to the downstream lamella 5. The operation of the switching device is not described in more detail here because it is similar to that described by EP-A-0 584 587 .

La lamelle intermédiaire 6 est positionnée au fond de la cavité 10. La lamelle 6 est montée mobile par rapport au boîtier 1 sensiblement selon l'axe Z. En l'occurrence, elle peut coulisser vers le bas lorsqu'elle est poussée par le fusible 21 arrivant au fond de la cavité 10 et elle est repoussée vers l'ouverture 9 par la force de rappel exercée par un organe élastique 6A, lorsque l'insert 20 est extrait de la cavité 10. En l'occurrence, l'organe élastique de rappel est constitué par un ressort 6A.The intermediate strip 6 is positioned at the bottom of the cavity 10. The strip 6 is mounted movably relative to the housing 1 substantially along the Z axis. In this case, it can slide downwards when it is pushed by the fuse. 21 arriving at the bottom of the cavity 10 and is pushed towards the opening 9 by the restoring force exerted by an elastic member 6A, when the insert 20 is extracted from the cavity 10. In this case, the elastic member of return is constituted by a spring 6A.

Au voisinage de son ouverture 9, la cavité 10 est définie par une paroi globalement cylindrique 11 réalisée dans le boîtier 1 ou dans une pièce solidaire du boîtier 1. La paroi 11 est destinée à guider avec un jeu fonctionnel l'insert 20, lors de son introduction dans la cavité 10. La paroi 11 présente une forme composée d'un cylindre à base circulaire jouxtant un prisme à base triangulaire et s'étendant selon un axe Z11-Z'11 parallèle à l'axe Z. La paroi 11 comprend une partie 11A en forme de portion de cylindre ménagée dans la moitié 1A du boîtier 1, ainsi qu'une autre partie 11 B en forme de demi-cylindre ménagé dans la moitié 1 B. La base de la paroi 11 est définie par l'ouverture 9 qui est en forme de disque dont un quart est prolongé par une région triangulaire 19. La région 19 est ici en forme de triangle rectangle isocèle délimité par deux parois 11A1 et 11A2 planes, parallèles à l'axe Z11-Z'11 et visibles notamment sur la figure 5.In the vicinity of its opening 9, the cavity 10 is defined by a generally cylindrical wall 11 made in the casing 1 or in a part integral with the casing 1. The wall 11 is intended to guide the insert 20 with a functional clearance, during its introduction into the cavity 10. the wall 11 has a shape composed of a circular cylinder adjacent to a triangular prism and extending along an axis Z 11 -Z '11 parallel to the axis Z. the wall 11 comprises a portion 11A in the form of a portion of a cylinder formed in the housing half 1A 1, as well as another half-cylinder shaped portion 11 B in the half 1 B. The base of the wall 11 is defined by the disc-shaped aperture 9, a quarter of which is extended by a region 19. the triangular region 19 is here in shape of isosceles triangle bounded by two walls 11A1 and 11A2 planar, parallel to the axis Z 11 -Z '11 and visible in particular in figure 5 .

Comme le montrent les figures 1, 4 et 6, l'interrupteur-sectionneur comprend deux rainures 12 et 13 comportant chacune une rampe 12A ou 13A de forme hélicoïdale. Ces rampes hélicoïdales 12A et 13A s'étendent chacune sur une partie de la paroi 11 limitée à un angle α de l'ordre de 95° visible sur la figure 5. Cet angle α correspond à une révolution d'environ un quart-de-tour, si bien qu'il est compris entre 85° et 105°. Chaque rainure 12 ou 13 débouche dans sa partie supérieure sur l'ouverture 9 par l'intermédiaire d'une rainure 14 ou 15 rectiligne et parallèle à l'axe Z11-Z'11. Dans la partie inférieure, la rainure 13 se termine par un siège 18 de profil rectangulaire.As shown by figures 1 , 4 and 6 , the switch-disconnector comprises two grooves 12 and 13 each having a ramp 12A or 13A of helical shape. These helical ramps 12A and 13A each extend over a portion of the wall 11 limited to an angle α of the order of 95 ° visible on the figure 5 . This angle α corresponds to a revolution of about a quarter turn, so that it is between 85 ° and 105 °. Each groove 12 or 13 opens into the upper part of the opening 9 via a groove 14 or 15 straight and parallel to the axis Z 11 -Z '11. In the lower part, the groove 13 ends with a seat 18 of rectangular profile.

Dans la rainure 13, comme il ressort plus particulièrement de la figure 4, la jonction entre la rampe hélicoïdale 13A et le siège 18 est réalisée par un méplat 16 suivi d'une courte rampe terminale 17 aboutissant sur le siège 18 et dirigée vers le haut, contrairement à la rampe hélicoïdale 13A. Le pas de l'hélice définissant les rampes hélicoïdales est déterminé pour obtenir une course C en translation verticale comprise entre 2 et 6 mm et valant en l'occurrence 3,5 mm. Le retrait du siège 18, c'est-à-dire la distance verticale d séparant le méplat 16 du sommet du siège 18, peut être de l'ordre de 1 mm.In the groove 13, as is more particularly apparent from the figure 4 , the junction between the helical ramp 13A and the seat 18 is formed by a flat 16 followed by a short end ramp 17 leading to the seat 18 and directed upwards, unlike the helical ramp 13A. The pitch of the helix defining the helical ramps is determined to obtain a vertical travel C in the range of 2 to 6 mm and in this case being 3.5 mm. The removal of the seat 18, that is to say the vertical distance d separating the flat 16 from the top of the seat 18, may be of the order of 1 mm.

A l'instar de la rainure 13, la rainure 12 présente une rampe hélicoïdale 12A, puis un méplat 16. La section orthogonale de chaque rainure 12 ou 13 est rectangulaire.Like the groove 13, the groove 12 has a helical ramp 12A, then a flat 16. The orthogonal section of each groove 12 or 13 is rectangular.

A la différence de la rainure 13, la rainure 12 ne présente pas de siège, mais débouche simplement dans le volume prismatique défini par l'ouverture 19 et par l'axe Z11-Z'11. Néanmoins la rainure 12 pourrait également présenter un siège, en fonction des géométries sélectionnées pour le boîtier et pour l'insert.Unlike the groove 13, the groove 12 does not have a seat, but merely opens into the prismatic volume defined by the opening 19 and the axis Z 11 -Z '11. Nevertheless, the groove 12 could also have a seat, depending on the selected geometries for the housing and for the insert.

Les rainures 12 et 13 sont ainsi aptes à guider chacune un ergot 23 ou 24 solidaire de l'insert 20 à fusible 21. Dans la mesure où les rainures 12 et 13 s'étendent symétriquement par rapport à l'axe Z11-Z'11, les ergots 23 et 24 sont disposés de façon diamétralement opposée par rapport à un axe Z20-Z'20 selon lequel s'étend l'insert 20.The grooves 12 and 13 are thus able to guide each lug 23 or 24 integral with the fuse insert 21. Insofar as the grooves 12 and 13 extend symmetrically with respect to the axis Z 11 -Z ' 11 , the pins 23 and 24 are arranged diametrically opposite with respect to an axis Z 20 -Z '20 that the insert 20 extends.

Les rampes 12A et 13A s'appuient sur une hélice dextre. Le pas de vis qu'elles constituent est donc orienté à droite. Par conséquent, pour être introduit dans la cavité 10 ou pour en être extrait, l'insert 20 doit être respectivement vissé ou dévissé d'un quart-de-tour. L'extrémité interne ou inférieure de la rainure 12 s'évase de manière à former le siège 18 dont le sommet 18A est situé, par rapport au fond du boîtier 1 opposé à l'ouverture 9, à une altitude supérieure à celle du point le plus bas 13D de la rampe 13A. Les adjectifs interne et externe sont employés par référence à la cavité 10 et au boîtier 1. En d'autres termes, le sommet 18A est en retrait vers le haut par rapport au point interne extrême de la rampe 13A de la rainure 13.Ramps 12A and 13A rely on a dextral helix. The pitch they constitute is therefore oriented to the right. Therefore, to be introduced into the cavity 10 or to be extracted, the insert 20 must be respectively screwed or unscrewed by a quarter turn. The inner or lower end of the groove 12 flares to form the seat 18, the top 18A is located, relative to the bottom of the housing 1 opposite the opening 9, at an altitude greater than that of the point the lower 13D of ramp 13A. The internal and external adjectives are used with reference to the cavity 10 and the housing 1. In other words, the vertex 18A is recessed upwards with respect to the extreme internal point of the ramp 13A of the groove 13.

Lorsque l'insert 20 est vissé à fond dans les rainures 12 et 13, l'ergot 23 est logé au sein du siège 18 dans lequel il est maintenu par le ressort 6A qui exerce un effort vertical ascendant sur l'insert 20 par l'intermédiaire du contact 6. Les rainures 12 et 13, les ergots 23 et 24 et le ressort 6A constituent donc des moyens de verrouillage rapide, par vissage à quart-de-tour, de l'insert 20 dans le boîtier 1.When the insert 20 is fully screwed into the grooves 12 and 13, the lug 23 is housed within the seat 18 in which it is held by the spring 6A which exerts a vertical upward force on the insert 20 by the intermediate contact 6. The grooves 12 and 13, the lugs 23 and 24 and the spring 6A thus constitute rapid locking means, by quarter-turn screwing, the insert 20 in the housing 1.

Dans cette position terminale d'enclenchement, le pôle inférieur 21A du fusible 21 touche la lamelle 6. Il peut alors être électriquement relié à la lamelle aval 4 dans le cas où le pont 7 établit l'interconnexion après commutation en position fermée de la manette 8A et du levier 8B.In this terminal closing position, the lower pole 21A of the fuse 21 touches the strip 6. It can then be electrically connected to the downstream strip 4 in the case where the bridge 7 establishes the interconnection after switching to the closed position of the controller 8A and lever 8B.

L'insert 20 comporte un capuchon 22 en matériau électriquement isolant maintenant la cartouche fusible 21 de façon amovible. En effet, lorsque le fusible 21 a fondu après avoir protégé la ligne électrique contre un court-circuit ou une surcharge électrique, la cartouche doit pouvoir être ôtée et remplacée pour rétablir le passage du courant I dans la ligne électrique. Pour cela, la partie supérieure du fusible 21 peut être enchâssée par fixation élastique au sein d'une zone de réception non représentée du capuchon 22. Le fusible 21 et son capuchon 22 s'étendent selon l'axe Z20-Z'20 qui est parallèle à l'axe Z lorsque l'insert 20 est introduit dans la cavité 10.The insert 20 has a cap 22 of electrically insulating material holding the fuse 21 removably. Indeed, when the fuse 21 has melted after protecting the power line against a short circuit or an electrical overload, the cartridge must be removed and replaced to restore the passage of the current I in the power line. For this, the upper portion of the fuse 21 may be encased by resilient mount within a non-illustrated receiving zone of the cap 22. The fuse 21 and its cap 22 extend along the axis Z 20 -Z '20 which is parallel to the axis Z when the insert 20 is introduced into the cavity 10.

Le capuchon 22 présente une surface externe globalement cylindrique 22A à base circulaire, de manière à être guidé par la paroi 11. L'insert 20 porte les deux ergots 23 et 24 en saillie par rapport au capuchon 22 et diamétralement opposés par rapport à l'axe Z20-Z'20, ce qui leur permet de s'engager simultanément dans les rampes hélicoïdales 12A et 13A.The cap 22 has a generally cylindrical outer surface 22A with a circular base, so as to be guided by the wall 11. The insert 20 carries the two lugs 23 and 24 projecting relative to the cap 22 and diametrically opposed with respect to the axis Z 20 -Z '20, which allows them to engage simultaneously in the helical ramps 12A and 13A.

L'insert 20 présente en outre une languette de contact 25 réalisée en un matériau électriquement conducteur. La languette 25 s'étend dans un plan perpendiculaire à l'axe Z20-Z'20 en saillie par rapport à la surface externe de l'insert 20. La languette 25 est orientée selon un angle β d'environ 45° par rapport à l'axe diamétral reliant les ergots 23 et 24. La pièce 26 formant la languette 25 est pliée et agencée dans le capuchon 22 de manière à entrer en contact avec le pôle supérieur 21 B visible à la figure 8 du fusible 21 lorsqu'il est recouvert par le capuchon 22. Le pôle inférieur 21A du fusible 21 est susceptible d'être relié électriquement à la borne aval 3 et le pôle supérieur du fusible 21 à la borne amont 2.The insert 20 further has a contact tab 25 made of an electrically conductive material. The tab 25 extends in a plane perpendicular to the axis Z 20 -Z '20 projecting relative to the outer surface of the insert 20. The tongue 25 is oriented at an angle β of about 45 ° with respect to the diametral axis connecting the lugs 23 and 24. The piece 26 forming the tongue 25 is folded and arranged in the cap 22 so as to come into contact with the upper pole 21 B visible at the figure 8 fuse 21 when covered by the cap 22. The lower pole 21A of the fuse 21 is capable of being electrically connected to the downstream terminal 3 and the upper pole of the fuse 21 to the upstream terminal 2.

Pour établir le contact avec la languette 25, la lamelle amont 4 comporte une portion 4A plane s'étendant à proximité de la cavité 10 et en forme de rectangle sectionné au quart par un segment circulaire. Dans la direction verticale, la portion 4A se trouve située entre la lamelle 6 et l'ouverture 9. Plus précisément, la portion 4A se trouve à une altitude inférieure à celles du bas de la paroi 11 et des rainures 12 et 13.To establish contact with the tongue 25, the upstream lamella 4 comprises a flat portion 4A extending near the cavity 10 and in the form of rectangle sectioned at quarter by a circular segment. In the vertical direction, the portion 4A is located between the lamella 6 and the opening 9. More specifically, the portion 4A is at an altitude lower than those of the bottom of the wall 11 and grooves 12 and 13.

La géométrie et la position de la portion 4A sont déterminées de façon à établir le contact avec la languette 25, lorsque l'insert 20 est introduit dans la cavité 10 et que ses ergots 23 et 24 sont vissés à fond dans les rainures 12 et 13, respectivement jusque dans le siège 18 et le prisme triangulaire. En l'occurrence, l'extrémité de la portion 4A se trouve en porte-à-faux dans la périphérie de la cavité 10 et présente une forme sensiblement cylindrique inscrite sur le prolongement fictif du cylindre formant la paroi 11. Une telle forme ne fait donc pas obstacle à l'introduction de l'insert 20 ni, en particulier, au passage du capuchon 22 et de la languette 25.The geometry and the position of the portion 4A are determined so as to make contact with the tongue 25, when the insert 20 is introduced into the cavity 10 and its lugs 23 and 24 are screwed fully into the grooves 12 and 13. respectively into the seat 18 and the triangular prism. In this case, the end of the portion 4A is cantilevered in the periphery of the cavity 10 and has a substantially cylindrical shape inscribed on the imaginary extension of the cylinder forming the wall 11. Such a shape does not therefore not an obstacle to the introduction of the insert 20 nor, in particular, to the passage of the cap 22 and the tongue 25.

Les dimensions de la languette 25 et de la portion 4A correspondante sont sélectionnées en fonction du calibre thermique de l'interrupteur-sectionneur, c'est-à-dire de manière à obtenir une superficie et une section suffisante pour le passage du courant sans risquer la détérioration des pièces en contact.The dimensions of the tongue 25 and the corresponding portion 4A are selected according to the thermal rating of the switch-disconnector, that is to say in order to obtain an area and a section sufficient for the passage of the current without risking deterioration of the parts in contact.

Comme le montre la figure 7, le boîtier 1 comporte une nervure de protection 10A positionnée de manière à recouvrir les faces supérieure et interne de la portion 4A. Une telle nervure 10A est réalisée en matériau électriquement isolant et elle est solidaire du boîtier 1. Elle permet de masquer la portion 4A afin d'empêcher un contact accidentel avec le doigt d'un opérateur passant à travers l'ouverture 9, pour le cas où la section amont L2 de la ligne électrique est directement reliée à un générateur de courant maintenu sous tension.As shown in figure 7 , the housing 1 comprises a protective rib 10A positioned to cover the upper and inner faces of the portion 4A. Such a rib 10A is made of electrically insulating material and is integral with the housing 1. It allows to hide the portion 4A to prevent accidental contact with the finger of an operator passing through the opening 9, for the case where the upstream section L 2 of the power line is directly connected to a current generator maintained under tension.

De plus, le boîtier 1 présente une seconde nervure 10C de protection disposée parallèlement à la nervure 10A et sous celle-ci, de façon à empêcher un contact accidentel entre la portion 4A et le doigt se repliant vers le haut d'un opérateur. La portion 4A et la nervure 10C ménagent un espace 10B apte à loger la languette 25. Lorsque l'insert 20 est en position verrouillée symbolisée par la lettre F à la figure 5 et correspondant à la position illustrée par la figure 3, la languette 25 se trouve donc encadrée dessus et dessous par la portion 4A et les nervures 10A et 10C. Lorsque le boîtier 1 est issu du moulage d'un matériau électriquement isolant, les nervures 10A et 10C peuvent par exemple être constituées d'ailes horizontales moulées depuis l'une des parois latérales du boîtier 1 dans la cavité 10.In addition, the housing 1 has a second protective rib 10C disposed parallel to the rib 10A and below, so as to prevent accidental contact between the portion 4A and the finger folding upward of an operator. The portion 4A and the rib 10C provide a space 10B adapted to accommodate the tongue 25. When the insert 20 is in the locked position symbolized by the letter F to the figure 5 and corresponding to the position illustrated by the figure 3 , the tongue 25 is thus framed above and below by the portion 4A and the ribs 10A and 10C. When the casing 1 is derived from the molding of an electrically insulating material, the ribs 10A and 10C may for example consist of horizontal wings molded from one of the side walls of the casing 1 into the cavity 10.

Pour mettre en place l'insert 20 muni de son fusible 21 dans la cavité 10, il faut donc le visser dans le boîtier 1 suivant une révolution à quart-de-tour pour amener la languette 25 au contact de la portion 4A. Pour cela, il faut tout d'abord présenter, face à l'ouverture 9, la partie inférieure du fusible 21, puis l'introduire au sein du volume globalement cylindrique défini par la paroi 11. Il faut ensuite présenter la languette 25 en face de la région triangulaire 19 correspondante de l'ouverture 9. La languette 25 est alors en position ouverte ou sectionnée symbolisée par la lettre O à la figure 5, correspondant à la position illustrée par la figure 2.To set up the insert 20 with its fuse 21 in the cavity 10, it must be screwed into the housing 1 in a quarter-turn revolution to bring the tongue 25 in contact with the portion 4A. For this, it is first necessary to present, facing the opening 9, the lower part of the fuse 21, then introduce it into the generally cylindrical volume defined by the wall 11. It is then necessary to present the tongue 25 opposite of the corresponding triangular region 19 of the opening 9. The tongue 25 is then in the open or sectioned position symbolized by the letter O to the figure 5 , corresponding to the position illustrated by the figure 2 .

La présence de la languette 25 en saillie par rapport à la face externe de l'insert 20 constitue un moyen de détrompage imposant un sens de montage unique de l'insert 20 dans le boîtier 1. Pour pouvoir être engagée dans la région 19, la languette 25 présente une superficie inférieure à celle de l'ouverture ou région 19.The presence of the tongue 25 protruding from the outer face of the insert 20 is a keying means imposing a single mounting direction of the insert 20 in the housing 1. To be engaged in the region 19, the tongue 25 has an area smaller than that of the opening or region 19.

Les ergots 23 et 24 sont ensuite engagés respectivement dans les rainures d'entrée 14 et 15 avant d'aborder les rampes hélicoïdales 12A et 13A. L'opérateur doit alors tourner l'insert 20 pour lui imprimer un mouvement hélicoïdal, dans le sens de la flèche H à la figure 3, guidé par les rainures 12 et 13. Au cours de ce mouvement H, l'insert 20 accoste le contact intermédiaire 6 par le biais du pôle inférieur 21A. Le contact 6 constitue donc le premier organe de contact électrique touché par l'insert 20.The lugs 23 and 24 are then respectively engaged in the input grooves 14 and 15 before approaching the helical ramps 12A and 13A. The operator must then turn the insert 20 to print a helical movement, in the direction of the arrow H to the figure 3 , guided by the grooves 12 and 13. During this movement H, the insert 20 accostes the intermediate contact 6 through the lower pole 21A. The contact 6 thus constitutes the first electrical contact member touched by the insert 20.

Lorsque l'opérateur continue à déplacer l'insert 20 vers le bas, il commence alors à comprimer le ressort 6A par l'intermédiaire du premier organe de contact 6. Arrivé à l'extrémité inférieure des rampes hélicoïdales, les ergots 23 et 24 s'engagent contre les méplats 16 grâce auxquels le mouvement de l'insert 20 devient une révolution pure, sans translation. Les méplats 16 correspondent aux points les plus bas atteints par les ergots 23 et 24, où le ressort 6A est le plus comprimé.When the operator continues to move the insert 20 downward, he then begins to compress the spring 6A via the first contact member 6. At the lower end of the helical ramps, the pins 23 and 24 s engage the flats 16 by which the movement of the insert 20 becomes a pure revolution, without translation. The flats 16 correspond to the lowest points reached by the pins 23 and 24, where the spring 6A is the most compressed.

Une révolution supplémentaire de l'insert 20 fait ensuite remonter l'ergot 24 le long de la rampe terminale 17 jusqu'au siège 18 situé en retrait vertical par rapport au point le plus bas 13D de l'hélice, c'est-à-dire par rapport à l'altitude des méplats 16. Il en va de même au niveau de l'ergot 23 et de la rampe 12, l'ergot 23 parvenant alors au-dessous de la région 19. Le ressort 6A se détend alors légèrement tout en maintenant le contact entre la lamelle 6 et le pôle inférieur 21A.An additional revolution of the insert 20 then causes the lug 24 to rise along the end ramp 17 to the seat 18 located in vertical recess with respect to the lowest point 13D of the propeller, that is to say the same applies to the pin 23 and the ramp 12, the pin 23 then reaching below the region 19. The spring 6A then relaxes slightly while maintaining the contact between the lamella 6 and the lower pole 21A.

Au fur et à mesure de la révolution de l'insert 20, la languette 25 vient se placer en regard de la portion 4A de la lamelle amont 4. Lors du guidage de l'ergot 24 par la rampe terminale 17, l'insert 20 remonte légèrement, si bien que la languette 25 accoste la face inférieure de la portion 4A établissant ainsi la conduction électrique entre le pôle supérieur 21 B du fusible 21 et la lamelle amont 4. Cette dernière constitue donc chronologiquement le deuxième organe de contact électrique touché par l'insert 20. Le ressort 6A exerce alors un effort dirigé vers le haut sur la lamelle 6, donc sur le pôle inférieur 21A. Le fusible 21 transmet cet effort à la languette 25 qui est maintenue en contact avec la portion 4A par une pression assurant une superficie d'interface électrique importante, minimisant ainsi l'échauffement des pièces conductrices.As and when the revolution of the insert 20, the tongue 25 is placed opposite the portion 4A of the upstream lamella 4. When guiding the pin 24 by the end ramp 17, the insert 20 back slightly, so that the tongue 25 accosts the lower face of the portion 4A thus establishing the electrical conduction between the upper pole 21 B of the fuse 21 and the upstream lamella 4. The latter is therefore chronologically the second electrical contact member touched by the insert 20. The spring 6A then exerts a force directed upwards on the blade 6, so on the lower pole 21A. The fuse 21 transmits this force to the tongue 25 which is kept in contact with the portion 4A by a pressure ensuring a large electrical interface area, thus minimizing the heating of the conductive parts.

En revanche, le ressort 6A n'est pas destiné à exercer l'effort sur les ergots 23 et 24, qui, en l'occurrence, demeurent exempts de contraintes mécaniques lorsqu'ils occupent leurs positions terminales respectives au sein des rainures 13 et 12. Les ergots 23 et 24 flottent ainsi au niveau du siège 18 et du volume prismatique triangulaire.On the other hand, the spring 6A is not intended to exert the force on the lugs 23 and 24, which, in this case, remain free from mechanical stresses when they occupy their respective end positions within the grooves 13 and 12. The lugs 23 and 24 thus float at the seat 18 and the triangular prismatic volume.

Ainsi, lorsque l'insert 20 est en place au fond de la cavité 10, le fusible 21 relie électriquement le premier organe 6 au deuxième organe 4. De plus, lorsque la manette 8A est rabattue sur le boîtier 1 fermant ainsi le circuit électrique, la lamelle 6 est électriquement reliée à la lamelle aval 5 par l'intermédiaire du pont 7, ce qui permet le passage du courant I à travers l'interrupteur-sectionneur.Thus, when the insert 20 is in place at the bottom of the cavity 10, the fuse 21 electrically connects the first member 6 to the second member 4. In addition, when the handle 8A is folded down on the housing 1 thus closing the electrical circuit, the lamella 6 is electrically connected to the downstream lamella 5 via the bridge 7, which allows the passage of the current I through the switch-disconnector.

Lorsque l'opérateur souhaite isoler la ligne électrique où est montée l'interrupteur-sectionneur, il doit d'abord relever la manette 8A coupant le courant I de façon à accéder à l'insert 20. Il doit ensuite dévisser d'un quart-de-tour l'insert 20 pour l'extraire de la cavité 10. Pour cela, la partie supérieure du capuchon 22 présente deux zones de préhension 22B et 22C symétriques par rapport au plan vertical médian et grâce auquel l'opérateur peut saisir et manipuler l'insert 20. Lorsque ce dernier est ôté de la cavité 10, la ligne électrique L2-L3 sur laquelle est monté l'interrupteur-sectionneur est effectivement isolée, sans risque de rétablissement intempestif du courant I.When the operator wishes to isolate the electrical line where the switch-disconnector is mounted, he must first raise the handle 8A cutting the current I so as to access the insert 20. It must then unscrew a quarter- de-turn the insert 20 to extract it from the cavity 10. For this, the upper part of the cap 22 has two gripping zones 22B and 22C symmetrical with respect to the median vertical plane and thanks to which the operator can grasp and manipulate the insert 20. When the latter is removed from the cavity 10, the electrical line L 2 -L 3 on which is mounted the switch-disconnector is effectively isolated, without risk of inadvertent recovery of the current I.

Au lieu d'un quart-de-tour, on peut prévoir la fixation de l'insert 20 dans le boîtier 1 au moyen d'un verrouillage rapide à demi-tour, c'est-à-dire selon une course angulaire limitée à un angle compris entre 160° et 200°.Instead of a quarter turn, one can provide the attachment of the insert 20 in the housing 1 by means of a quick turn latch, that is to say, with an angular stroke limited to an angle between 160 ° and 200 °.

Une fois la ligne isolée, l'opérateur peut, le cas échéant, remplacer le fusible 21. La fixation élastique de ce dernier dans le réceptacle du capuchon 22 peut être réalisée au moyen d'une lamelle de contact pliée de façon à se conformer à une portion substantielle de la circonférence interne du réceptacle du capuchon 22. La lamelle peut être surmoulée, soudée ou accrochée par coincement dans le capuchon 22.Once the line is isolated, the operator can, if necessary, replace the fuse 21. The elastic attachment of the latter in the receptacle of the cap 22 can be achieved by means of a contact strip folded so as to comply with a substantial portion of the inner circumference of the receptacle of the cap 22. The lamella may be overmoulded, welded or hooked by wedging in the cap 22.

Par ailleurs, la face supérieure 22D du capuchon 22 présente une géométrie symétrique par rapport au plan médian vertical. Cette face 22D globalement en forme de rectangle horizontal peut ainsi être alignée par l'opérateur face à un repère fixe 1C prévu sur le boîtier 1 pour témoigner de manière certaine de la mise en place effective et complète de l'insert 20 en position verrouillée F dans la cavité 10. En d'autres termes, l'opérateur constate visuellement que le contact est établi grâce au fusible 21 lorsqu'il a aligné la face 22D et le repère 1C, sans avoir besoin d'entendre un déclic. La mise en place de l'insert 20 est donc particulièrement rapide et intuitive pour un opérateur. Ceci constitue un avantage essentiel lorsque l'opérateur doit mettre en place un nombre élevé d'inserts à fusibles.Moreover, the upper face 22D of the cap 22 has a symmetrical geometry with respect to the vertical median plane. This face 22D globally shaped horizontal rectangle can thus be aligned by the operator facing a fixed reference 1C provided on the housing 1 to testify to certain manner of the actual and complete introduction of the insert 20 in the locked position F in the cavity 10. In other words, the operator visually observes that the contact is established by the fuse 21 when it has aligned the 22D face and 1C mark, without the need to hear a click. The introduction of the insert 20 is therefore particularly fast and intuitive for an operator. This is an essential advantage when the operator has to set up a large number of fuse inserts.

De plus, l'interrupteur-sectionneur peut comprendre un dispositif de verrouillage non représenté empêchant l'opérateur de rabattre la manette 8A en position fermée lorsque le contact n'est pas établi, c'est-à-dire lorsque l'insert 20 à fusible 21 n'est pas lui-même en position fermée F.In addition, the switch-disconnector may comprise a not shown locking device preventing the operator from folding the handle 8A in the closed position when the contact is not established, that is to say when the insert 20 to fuse 21 is not itself in closed position F.

Ce dispositif de verrouillage peut être construit de façon analogue à celui décrit par EP-A-0 584 587 , avec palette et ressort de torsion et adapté à la configuration de l'objet de l'invention.This locking device can be constructed in a manner similar to that described by EP-A-0 584 587 , with pallet and torsion spring and adapted to the configuration of the object of the invention.

Le fond de la cavité 10 peut aussi être muni d'un système de blocage pour y retenir de façon inamovible une rondelle de détrompage dont le diamètre interne correspond aux dimensions externes du pôle inférieur 21A d'un fusible 21 adapté au calibre thermique dévolu à l'interrupteur-sectionneur, comme le décrit EP-A-0 584 587 .The bottom of the cavity 10 may also be provided with a locking system for immovably retaining a polarizing washer whose inner diameter corresponds to the external dimensions of the lower pole 21A of a fuse 21 adapted to the thermal caliber devolved to the switch-disconnector, as described EP-A-0 584 587 .

Dans l'exemple des figures, les lamelles de contact 6, d'une part, et 4 et 5, d'autre part, sont formées par des lames pliées respectivement en Ω et en Z droit. Cependant, ces contacts peuvent présenter des nombres ou géométries différents, sans pour autant sortir du cadre de cette invention.In the example of the figures, the contact strips 6, on the one hand, and 4 and 5, on the other hand, are formed by blades bent respectively in Ω and in Z right. However, these contacts may have different numbers or geometries, without departing from the scope of this invention.

Claims (12)

  1. Circuit-breaker/disconnector for an electric power line (L2-L3), including a casing (1) having two terminals (2, 3) which are suitable to receive sections of electric power lines (L2, L3), as well as a switching device (7, 7A, 8A, 8B) which is suitable to cut off and to re-establish the passage of an electric current (I) between the terminals (2, 3), the casing (1) defining an open cavity (10) and being suitable to receive an insert (20) with fuse (21), the cavity (10) being defined, close to its opening (9), by a wall (11) which is integral with the casing (1) and intended to guide the insert (20) with fuse (21) towards the cavity (10), the casing (1) having a first contact member (6) positioned at the bottom of the cavity (10) and electrically connected to one of the terminals (3), as well as a second contact member (4) positioned (4A) between the opening (9) and the first contact member (6) and electrically connected to the other terminal (2), the circuit-breaker/disconnector including means for rapid locking of the insert (20) with fuse (21) by screwing of the insert (20) with fuse (21) limited to a partial revolution by angle (α) less than or equal to 270°, the insert (20) with fuse (21) being suitable to connect electrically the first (6) and second (4) contact members when it is in the locked position (F), and the locking means have at least one lug (23, 24) which is integral with the insert (20) with fuse (21) and at least one slot (12, 13) for receiving said lug, the wall (11) has a shape which is cylindrical overall (Z11-Z'11), with a partly circular base (9), and the rapid-locking means include two lugs (23, 24) and two slots (12, 13) each having a helical ramp (12A, 13A) extending over a limited part (α) of the wall (11) and emerging in the region of the opening (9) of the cavity (10), each slot (12, 13) being suitable to guide one of the lugs (23, 24) at the time of its introduction into the cavity (10), characterised in that at least one of the slots (13) is terminated by a seat (18) which has a recess (18A) towards the opening (9) in relation to the corresponding ramp (13A) and against which the corresponding lug (23, 24) is retained by means of an elastic member (6A) exerting a stress tending to push the insert (20) with fuse (21) back along the axis (Z11-Z'11) of the wall (11) and in the direction of the opening (9).
  2. Circuit-breaker/disconnector according to Claim 1, characterised in that the second contact member (4) is permanently mounted between the first contact member (6) and the slots (12, 13), and in that the insert (20) with fuse (21) exhibits a tab (25) made of electrically conductive material, which is connected to the fuse (21) and suitable to come into contact with the second contact member (4) when the insert (20) with fuse (21) is in the locked position (F).
  3. Circuit-breaker/disconnector according to either of Claims 1 to 2, characterised in that each slot (12, 13) exhibits a flat part (16) extending the ramp (12A, 13A).
  4. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the second contact member (4) is arranged (4A) on the periphery of the cavity (10), and in that the circuit-breaker/disconnector includes at least one protective rib (10A) produced from electrically insulating material and partially covering the second contact member (4).
  5. Circuit-breaker/disconnector according to Claims 2 and 4, characterised in that it includes two mutually parallel protective ribs (10A, 10C) which are planar (X-Y) overall, and in that the second contact member (4) includes a portion (4A) which is intended to establish contact with the tab (25) and which is positioned between the two ribs (10A, 10C) so as to define a compartment (10B) for the tab (25).
  6. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the screw thread of the ramps (12A, 13A) is oriented (H) to the right, and in that the two slots (12, 13) extend in substantially symmetrical manner in relation to the axis (Z11-Z'11) of the wall (11).
  7. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the part of the wall (11) is limited to an angle (α) between 85° and 105° so as to implement a partial revolution over about a quarter-turn.
  8. Circuit-breaker/disconnector according to one of Claims 2 to 6, characterised in that the part of the wall (11) is limited to an angle (α) between 160° and 200° so as to implement a partial revolution over about a half-turn.
  9. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the pitch of the helix is determined in such a way that the height (C) of the helix along the axis (Z11-Z'11) of the wall (11) is between 2 mm and 6 mm.
  10. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that each ramp (12A, 13A) emerges into the opening (9) via a rectilinear slot (14, 15) parallel to the axis (Z11-Z'11) of the wall (11).
  11. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the insert (20) with fuse (21) has a cap (22) exhibiting an outer surface (22A) of cylindrical shape with a circular base, from which the lugs (23, 24) extend, the cap (22) exhibiting a locating means (22D) which is symmetrical in relation to a plane including the axis (Z20-Z'20) of the outer surface (22A), and in that the casing (1) has a fixed point of reference (1C) positioned in such a way as to indicate the locked position (F) of the insert (20) with fuse (21) in the casing (1) by its alignment with the locating means (22D).
  12. Circuit-breaker/disconnector according to one of the preceding claims, characterised in that the opening (9) is in the form of a disc which is co-axial with the axis (Z11-Z'11) of the wall (11) extended by a region (19) delimited by two non-circular walls (11A1, 11A2) which are parallel to the axis (Z11- Z'11) of the wall (11), the tab (25) exhibiting a surface area smaller than that of the region (19) and performing the function of a locating pin at the time of introduction of the insert (20) with fuse (21) into the cavity (10).
EP08356019A 2007-01-31 2008-01-30 Quick-locking fuse circuit breaker Active EP1953779B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08356019T PL1953779T3 (en) 2007-01-31 2008-01-30 Quick-locking fuse circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700669A FR2911994B1 (en) 2007-01-31 2007-01-31 FAST LOCK FUSE SWITCH DISCONNECT SWITCH.

Publications (2)

Publication Number Publication Date
EP1953779A1 EP1953779A1 (en) 2008-08-06
EP1953779B1 true EP1953779B1 (en) 2013-01-23

Family

ID=38330174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08356019A Active EP1953779B1 (en) 2007-01-31 2008-01-30 Quick-locking fuse circuit breaker

Country Status (5)

Country Link
EP (1) EP1953779B1 (en)
DK (1) DK1953779T3 (en)
ES (1) ES2399687T3 (en)
FR (1) FR2911994B1 (en)
PL (1) PL1953779T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3832683T3 (en) * 2019-12-03 2023-05-29 Jean Müller GmbH Elektrotechnische Fabrik Switching device for a busbar system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1785290A (en) * 1929-06-04 1930-12-16 George B Wadsworth Company Safety electrical device
US3474373A (en) * 1967-06-22 1969-10-21 Ite Imperial Corp Fuse holder including coordinated operating means between fuse insertion and an associated circuit breaker device
DE9211229U1 (en) 1992-08-21 1994-01-05 Lindner Gmbh Fuse switch with voltage isolation on both sides
DE29714133U1 (en) * 1997-08-07 1997-10-09 Klaus Bruchmann Gmbh Secured with a safety slide
DE19734233A1 (en) * 1997-08-07 1999-02-11 Klaus Bruchmann Fuse with removable fuse holder

Also Published As

Publication number Publication date
EP1953779A1 (en) 2008-08-06
PL1953779T3 (en) 2013-06-28
DK1953779T3 (en) 2013-02-11
FR2911994B1 (en) 2009-07-03
FR2911994A1 (en) 2008-08-01
ES2399687T3 (en) 2013-04-02

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