EP1194943B1 - Fuse-holder clip and fuse-holder equipped with same - Google Patents
Fuse-holder clip and fuse-holder equipped with same Download PDFInfo
- Publication number
- EP1194943B1 EP1194943B1 EP00951610A EP00951610A EP1194943B1 EP 1194943 B1 EP1194943 B1 EP 1194943B1 EP 00951610 A EP00951610 A EP 00951610A EP 00951610 A EP00951610 A EP 00951610A EP 1194943 B1 EP1194943 B1 EP 1194943B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuse
- capsule
- lines
- clip
- contact
- 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
Links
- 239000002775 capsule Substances 0.000 claims description 52
- 238000000605 extraction Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/20—Bases for supporting the fuse; Separate parts thereof
- H01H85/202—Bases for supporting the fuse; Separate parts thereof for fuses with ferrule type end contacts
Definitions
- the invention relates to a jaw for a fuse holder and a fuse holder equipped with at least one such jaw.
- a jaw is described for example in US-A-4176906.
- the standards provide that the force of support or pressure of a jaw on a capsule of fuse must be in the range of several tens of Newton. For example, in the case of a fuse whose terminals have a diameter of 27 mm, the supporting force must be greater or equal to 45 Newton. If such a force is useful when the fuse is in place in the jaw, she opposes the setting in place and extracting the fuse from the jaw, such so that the efforts that an operator must make to these occasions are intense to the point that wrong maneuvers can be generated.
- contacts between the cylindrical capsule of a fuse and the two legs of a jaws can be concentrated in two divided areas of both sides of the capsule, so that the sizing jaws should be provided considering that the current of breakdown is divided in two at the level of each jaw. This imposes the constitution of thick jaws, therefore rigid, and induces additional difficulties when setting up or extracting a fuse.
- the invention relates to a jaw for fuse holder comprising two legs intended to define between they a space of reception of a capsule of fuse with section circular, characterized in that these tabs are folded according to parallel directions to a central axis of the capsule in place in the jaw, so that they form each two lines of electrical contact and mechanical support on the radial surface of this capsule, these two lines being overall parallel to this axis.
- the contact between each of the legs of the jaw and the capsule of a fuse is exerted according to two lines, so that the friction forces that must be defeated when setting up or extracting of a fuse are generated only between these lines and the outer radial surface of the capsule. They are therefore less important than in the case of surface contacts such obtained with the devices of the state of the art.
- a the capsule in place in the jaw this one is effectively maintained through the cooperation of the four lines contact formed by the two jaws.
- These four lines of contact also result in a division into four of the breakdown current, or even three in case of imperfection geometric result in a capsule support on three of the four lines of contact formed by the two jaws.
- the maximum current flowing in each of the contact areas is thus equal to a quarter or a third of the breakdown current of the fuse, which makes it possible to dimension the jaws based on this value, and not according half of the breakdown current as in the devices of the state of the art.
- the invention also allows appropriately dimension the rockers intended for the joint operation of several fuses, since the efforts that they have to bear are significantly less important than in the devices of the state of the art.
- the invention also relates to an equipped fuse holder at least one jaw as previously described.
- Such fuse holder is easier to handle for a user while remaining reliable and of moderate cost price.
- the jaw 1 visible in FIGS. 1 to 6 comprises a base 2 extending by a tongue 3 to be connected to an electrical conductor 4 schematized by a center line and belonging to a line to be connected to a fuse 5 shown in phantom lines in Figures 1 to 5 and in lines full in Figure 6.
- the base 2 is extended by two legs 21 and 22 which extend in a direction generally perpendicular to the base 2 and define between them a receiving space E of a cylindrical capsule 6 forming one of the end terminals fuse 5.
- X 1 is the axis of symmetry of the capsule 6, this axis X 1 being disposed in a median plane P of the space E when the capsule 6 is in place in the jaw 1, as shown in Figures 1 and 5.
- D 6 the diameter of the capsule 6.
- P 21 is a plane generally parallel to the plane P which constitutes a central plane of the lug 21 in its lower part.
- P 22 an equivalent plan for the tab 22.
- the tab 21 is folded outwardly of the plane P 21 with respect to the space E, about an axis A 21 generally parallel to the axis X 1 in the configuration of FIGS. From the axis A 21 , the lug 21 forms a zone 21 b which is deformed outwards with respect to the plane P 21 and which is concave in the direction of the space E because it is folded around a second axis C 21 parallel to the axis A 21 , and in an opposite direction. The tab 21 is also folded along an axis D 21 parallel to the axis A 21 and approximately in the plane P 21 . Respectively 21 and 21 is noted e f surfaces defined between the axes A 21 and C 21 on the one hand, C 21 and D 21 on the other. Area 21b is formed of surfaces 21e and 21f .
- the tab 21 is extended by an end 21 g folded outwardly of the plane P 21 .
- ⁇ is the angle at the top of the zone 21 b in the plane of Figures 2 to 5 and ⁇ the angle of inclination outwardly of the end 21 g of the lug 21, that is to say say its angle of divergence with respect to the plane P.
- the tab 22 is folded about axes A 22 , C 22 and D 22 parallel to the axes A 21 , C 21 and D 21 and comprises two surfaces 22 e and 22 f extending outside the plane P 22 with respect to the space E and defining an outwardly deformed zone 22b between the axes A 22 and D 22 .
- the end 22 g of the tab 22 is folded outwards with respect to the plane P 22 .
- the elastic bearing force of the jaw 1 on the surface 6 a is decomposed into four elementary forces F A 21 , F D 21 , F A 22 and F D 22 , these forces being globally directed to the X axis 1 .
- the lines 21a and 22a are formed by the generatrices of the inner faces of the lugs 21 and 22 at the pins A 21 and A 22, these generatrices being defined at the join respectively between the inner face of each leg 21 or 22 in its portion 21c or 22c parallel to the plane P 21 or P 22 and the surface 21 e or 22 e .
- the lines 21 d and 22 d are formed by the generatrices of the inner faces of the lugs 21 and 22 at the axes D 21 and D 22 , these generatrices being defined respectively at the junction of the inner faces of the surfaces 21 f and 21 g or 22 f and 22 g .
- the traces of the lines 21 a, 22 a, 21 d and 22 d are included in two angular sectors ⁇ 21 and ⁇ 22 in which there is the apex angle ⁇ .
- the angle ⁇ is of the order of 24 °, this value giving satisfactory results over a range of between 20 and 28 °.
- This relatively low angle value ⁇ corresponds to fact that the legs 21 and 22 are relatively little deformed in flexion when setting up and extracting the capsule 6. Efforts to overcome therefore retain a value relatively low, resulting in ease of use when setting up and fuse extraction 5.
- the contact lines 21 a, 22 a, 21 d and 22 d are sufficiently close to each other so that the surface 6a of the cartridge 6 is not likely to penetrate into areas 21b and 22 b to the point that surface contact occurs between the surface 6a and the inner surface of the areas 21 b and 22 b.
- the geometry of the tabs 21 and 22 ensures a double linear contact between these tabs and the capsule 6, including in case of slight dimensional defects of the jaw 1 or the capsule 6.
- the maximum current capable of transiting between the fuse 5 and the conductor 4 is divided into four at lines 21 a, 22 a, 21 d and 22 d. If geometrical default of the capsule 6, one of the aforementioned lines may not be in contact with the surface 6a, maintaining however being properly ensured thanks to the three other contact line defining, with the cartridge 6, a isostatic system. In all cases, it can be considered that the maximum current flowing on a line of contact between the surface 6a and a lug 21 or 22 is at most equal to one-third or one quarter of the fuse breakdown current, so that the thickness e of the legs 21 and 22 can be defined according to this parameter.
- the tabs 21 and 22 therefore work in both flexion and friction.
- the effort F 2 that the user must exert is essentially intended to move the lugs 21 and 22 by flexion, as represented by the arrows F 4 , because the friction force is substantially reduced by the fact that essentially linear contact which then takes place between the lines 21 d and 22 d and the surface 6 a .
- This effort is not much greater than the effort that must be exerted in the configuration of Figure 3, even as the legs 21 and 22 are more bent.
- d 1 the distance between the lines 21 a and 22 a on the one hand, 21 d and 22 d on the other hand, in the configuration of Figure 5. Given the relatively low value of the angle ⁇ , the distance d 1 is slightly less than the diameter D 6 , which corresponds to the fact that the tabs 21 and 22 are only slightly deformed in flexion during the placement of the capsule 6.
- two jaws 1 and 1 ' can be used in a fuse holder being arranged, in opposition, at the level of the two capsules 6 and 6' of a fuse 5.
- Each jaw 1 or 1 ' is connected by a leg 3 or 3 'to a conductor 4 or 4'.
- Each jaw is associated with a spring 7 or 7 ', in the form of a clamp, provided to exert on the legs 21 and 22 a pinching force F 5 of the capsules 6 or 6'.
- the force F 5 may be relatively large, especially so that the fuse holder complies with the standards in force, without interfering with the installation and extraction of the fuse, because this effort F 5 is transmitted to the capsules 6 and 6 'by the line contact achieved in the lines 21 a, 22 a, 21 d and 22 d.
- the movement of introduction and extraction of the fuse 5 in the jaws 1 is a pivotal movement about a transverse axis Y, this movement being represented by the arrow F 6 .
- the ends 21 g and 22 g each comprise an edge at an angle 21 h , 22 h .
Landscapes
- Fuses (AREA)
- Measuring Leads Or Probes (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Saccharide Compounds (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
L'invention a trait à une mâchoire pour un porte-fusible et à un porte-fusible équipé d'au moins une telle mâchoire. Une telle mâchoire est décrite par example dans US-A-4176906.The invention relates to a jaw for a fuse holder and a fuse holder equipped with at least one such jaw. Such a jaw is described for example in US-A-4176906.
Dans le domaine de la protection des installations électriques, il est connu d'utiliser des cartouches fusibles dites cylindriques, c'est-à-dire dont les deux bornes ou capsules sont cylindriques, ces bornes ou capsules étant prévues pour être reçues dans des mâchoires, elles-mêmes connectées à des lignes électriques. Les mâchoires des dispositifs connus comprennent des parties arrondies prévues pour épouser globalement une partie de la circonférence de la capsule cylindrique d'un fusible. Le contact entre les mâchoires et la capsule est ainsi surfacique.In the field of plant protection electric, it is known to use fusible cartridges cylindrical, that is to say of which the two terminals or capsules are cylindrical, these terminals or capsules being intended to be received in jaws, themselves connected to power lines. Jaws of the devices known include rounded parts intended for to marry globally part of the circumference of the cylindrical capsule of a fuse. The contact between the jaws and the capsule is thus surface.
Par ailleurs, pour résister à un effort de répulsion créé lors d'une surintensité, entre la capsule d'un fusible et la mâchoire dans laquelle il est reçu, les normes prévoient que la force d'appui ou de pression d'une mâchoire sur une capsule de fusible doit être de l'ordre de plusieurs dizaines de Newton. Par exemple, dans le cas d'un fusible dont les bornes ont un diamètre de 27 mm, la force d'appui doit être supérieure ou égale à 45 Newton. Si une telle force est utile lorsque le fusible est en place dans la mâchoire, elle s'oppose à la mise en place et à l'extraction du fusible de la mâchoire, de telle sorte que les efforts que doit exercer un opérateur à ces occasions sont intenses au point que des fausses manoeuvres peuvent être générées. Ainsi, il n'est pas rare que lorsqu'on extrait un fusible d'une mâchoire connue, l'effort à exercer, qui doit vaincre les frottements générés au niveau des surfaces de contact, est tellement important qu'il induit un arrachement violent du fusible qui "saute" de son logement dans le porte-fusible, et tombe à terre.Moreover, to resist a repulsion effort created during an overcurrent, between the capsule of a fuse and the jaw in which it is received, the standards provide that the force of support or pressure of a jaw on a capsule of fuse must be in the range of several tens of Newton. For example, in the case of a fuse whose terminals have a diameter of 27 mm, the supporting force must be greater or equal to 45 Newton. If such a force is useful when the fuse is in place in the jaw, she opposes the setting in place and extracting the fuse from the jaw, such so that the efforts that an operator must make to these occasions are intense to the point that wrong maneuvers can be generated. So, it is not uncommon that when extract a fuse from a known jaw, the effort to exert, who must overcome the friction generated at the surfaces of contact, is so important that it induces a tearing violent fuse "jumps" from its slot in the fuse holder, and falls to the ground.
En outre, dans les dispositifs connus, les contacts entre la capsule cylindrique d'un fusible et les deux pattes d'une mâchoire peuvent être concentrés en deux zones réparties de part et d'autre de la capsule, de sorte que le dimensionnement des mâchoires doit être prévu en considérant que le courant de claquage est divisé en deux au niveau de chaque mâchoire. Ceci impose la constitution de mâchoires épaisses, donc rigides, et induit des difficultés supplémentaires lors de la mise en place ou de l'extraction d'un fusible.In addition, in known devices, contacts between the cylindrical capsule of a fuse and the two legs of a jaws can be concentrated in two divided areas of both sides of the capsule, so that the sizing jaws should be provided considering that the current of breakdown is divided in two at the level of each jaw. This imposes the constitution of thick jaws, therefore rigid, and induces additional difficulties when setting up or extracting a fuse.
Dans les dispositifs de l'art antérieur, il est commun de prévoir de manoeuvrer plusieurs fusibles en parallèle, un basculeur étant prévu pour cette manoeuvre. Compte tenu des efforts importants qui doivent être exercés sur les fusibles lors de ces manoeuvres, le basculeur doit pouvoir supporter un effort très important qui conduit à son sur-dimensionnement, ce qui majore d'autant le prix de revient d'un porte-fusible.In the devices of the prior art, it is common to plan to maneuver several fuses in parallel, a rocker being provided for this maneuver. take in account the important efforts to be made on the fuses during these maneuvers, the rocker must be able to support a very important effort which leads to its over-sizing, this which increases all the cost of a fuse holder.
C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention, en proposant une mâchoire du type précité dans laquelle une capsule de fusible à section circulaire est efficacement maintenue et qui permet une introduction et une extraction aisées d'une telle capsule.It is these disadvantages that are particularly remedy the invention, by proposing a jaw of the aforementioned type wherein a circular section fuse capsule is effectively maintained and which allows for an introduction and easy extraction of such a capsule.
Dans cet esprit, l'invention concerne une mâchoire pour porte-fusible comprenant deux pattes destinées à définir entre elles un espace de réception d'une capsule de fusible à section circulaire, caractérisée en ce que ces pattes sont pliées selon des directions parallèles à un axe central de la capsule en place dans la mâchoire, de telle sorte qu'elles forment chacune deux lignes de contact électrique et d'appui mécanique sur la surface radiale de cette capsule, ces deux lignes étant globalement parallèles à cet axe.In this spirit, the invention relates to a jaw for fuse holder comprising two legs intended to define between they a space of reception of a capsule of fuse with section circular, characterized in that these tabs are folded according to parallel directions to a central axis of the capsule in place in the jaw, so that they form each two lines of electrical contact and mechanical support on the radial surface of this capsule, these two lines being overall parallel to this axis.
Grâce à l'invention, le contact entre chacune des pattes de la mâchoire et la capsule d'un fusible est exercé selon deux lignes, de telle sorte que les efforts de frottement qui doivent être vaincus lors de la mise en place ou de l'extraction d'un fusible sont générés uniquement entre ces lignes et la surface radiale externe de la capsule. Ils sont donc moins importants que dans le cas de contacts surfaciques tels qu'obtenus avec les dispositifs de l'état de la technique. Une fois la capsule en place dans la mâchoire, celle-ci est efficacement maintenue grâce à la coopération des quatre lignes de contact formées par les deux mâchoires. Ces quatre lignes de contact résultent également dans une division en quatre du courant de claquage, voire en trois en cas d'imperfection géométrique résultant dans un appui de la capsule sur trois des quatre lignes de contact formées par les deux mâchoires. Le courant maximum transitant dans chacune des zones de contact est ainsi égal à un quart ou un tiers du courant de claquage du fusible, ce qui permet de dimensionner électriquement les mâchoires en fonction de cette valeur, et non pas en fonction de la moitié du courant de claquage comme dans les dispositifs de l'état de la technique. L'invention permet également de dimensionner de façon appropriée les basculeurs prévus pour la manoeuvre conjointe de plusieurs fusibles, puisque les efforts qu'ils doivent supporter sont sensiblement moins importants que dans les dispositifs de l'état de la technique.Thanks to the invention, the contact between each of the legs of the jaw and the capsule of a fuse is exerted according to two lines, so that the friction forces that must be defeated when setting up or extracting of a fuse are generated only between these lines and the outer radial surface of the capsule. They are therefore less important than in the case of surface contacts such obtained with the devices of the state of the art. A the capsule in place in the jaw, this one is effectively maintained through the cooperation of the four lines contact formed by the two jaws. These four lines of contact also result in a division into four of the breakdown current, or even three in case of imperfection geometric result in a capsule support on three of the four lines of contact formed by the two jaws. The maximum current flowing in each of the contact areas is thus equal to a quarter or a third of the breakdown current of the fuse, which makes it possible to dimension the jaws based on this value, and not according half of the breakdown current as in the devices of the state of the art. The invention also allows appropriately dimension the rockers intended for the joint operation of several fuses, since the efforts that they have to bear are significantly less important than in the devices of the state of the art.
Selon des aspects avantageux de l'invention, la mâchoire incorpore une ou plusieurs des caractéristiques suivantes :
- Les traces des deux lignes de contact électrique et d'appui mécanique dans un plan perpendiculaire à la surface radiale de la capsule sont comprises dans un secteur, centré sur la trace de cet axe central dans ce plan, d'angle au sommet inférieur à 30°. On peut, en particulier, prévoir que cet angle au sommet est compris entre 20 et 28°, de préférence de l'ordre de 24°. Grâce à cette construction, les deux lignes de contact électrique et d'appui mécanique formées sur chaque patte sont relativement proches l'une de l'autre et le caractère linéique du contact peut être garanti dans la mesure où la surface radiale externe de la capsule ne peut pas pénétrer entre ces lignes au point de générer un contact surfacique.
- Chaque patte comprend, entre les lignes de contact, une zone déformée vers l'extérieur par rapport à un plan principal de la patte. Cette construction permet de réaliser les deux lignes de contact de façon particulièrement simple. La zone déformée comprend avantageusement deux surfaces inclinées par rapport au plan principal de chaque patte et l'une par rapport à l'autre. Dans ce cas, l'angle au sommet de cette zone déformée, qui est défini par les deux surfaces inclinées, est avantageusement compris entre 80 et 100°, de préférence de l'ordre de 90°.
- Les extrémités des pattes sont divergentes par rapport à un axe médian de la mâchoire. On peut prévoir que l'angle de divergence de ces extrémités est compris entre 16 et 24°, de préférence de l'ordre de 20°. Grâce à cette disposition, les extrémités des pattes forment un cône de glissement lors de l'introduction de la capsule du fusible dans la mâchoire, d'où une progressivité de l'effort que doit exercer l'opérateur pour la mise en place de la capsule, cette progressivité étant ressentie par l'utilisateur comme un confort supplémentaire. De plus, les extrémités évasées assistent le mouvement d'extraction de la cartouche fusible car elles exercent sur la capsule un effort élastique d'éjection par rapport à la mâchoire. Les pattes de la mâchoire de l'invention travaillent ainsi à la fois en flexion et en friction lors des mouvements de mise en place et d'extraction du fusible.
- Un ressort externe de maintien est prévu en appui sur les pattes de la mâchoire au niveau des zones déformées vers l'extérieur, par rapport à un plan principal de chaque patte, ces zones étant définies entre les lignes de contact. Ce ressort extérieur assure l'effort de serrage axial de la capsule de fusible lorsque celle-ci est en place dans la mâchoire.
- The traces of the two lines of electrical contact and mechanical support in a plane perpendicular to the radial surface of the capsule are included in a sector, centered on the trace of this central axis in this plane, with an apex angle less than 30 °. In particular, it is possible to provide that this apex angle is between 20 and 28 °, preferably of the order of 24 °. Thanks to this construction, the two lines of electrical contact and mechanical support formed on each leg are relatively close to each other and the linear nature of the contact can be guaranteed insofar as the outer radial surface of the capsule can not penetrate between these lines to the point of generating a surface contact.
- Each tab comprises, between the contact lines, a zone deformed outwardly with respect to a main plane of the tab. This construction makes it possible to make the two contact lines in a particularly simple manner. The deformed zone advantageously comprises two surfaces inclined with respect to the main plane of each leg and one relative to the other. In this case, the apex angle of this deformed zone, which is defined by the two inclined surfaces, is advantageously between 80 and 100 °, preferably of the order of 90 °.
- The ends of the tabs are divergent with respect to a median axis of the jaw. It can be provided that the angle of divergence of these ends is between 16 and 24 °, preferably of the order of 20 °. With this arrangement, the ends of the tabs form a sliding cone during the introduction of the fuse capsule into the jaw, resulting in a progressive effort required by the operator for the implementation of the capsule, this progressivity being felt by the user as additional comfort. In addition, the flared ends assist the extraction movement of the fuse cartridge because they exert on the capsule an elastic force of ejection relative to the jaw. The legs of the jaw of the invention thus work both flexibly and frictionally during the movements of introduction and extraction of the fuse.
- An external holding spring is provided in abutment on the tabs of the jaw at the outwardly deformed areas, with respect to a main plane of each tab, these areas being defined between the nips. This outer spring ensures the axial clamping force of the fuse cap when it is in place in the jaw.
L'invention concerne également un porte-fusible équipé d'au moins une mâchoire telle que précédemment décrite. Un tel porte-fusible est plus facile à manipuler pour un utilisateur tout en restant fiable et de prix de revient modéré.The invention also relates to an equipped fuse holder at least one jaw as previously described. Such fuse holder is easier to handle for a user while remaining reliable and of moderate cost price.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'une mâchoire pour porte-fusible et d'un porte-fusible conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :
- la figure 1 est une vue en perspective d'une mâchoire conforme à l'invention ;
- la figure 2 est une vue de face de la mâchoire de la figure 1 au repos ;
- la figure 3 est une vue analogue à la figure 2 alors qu'une capsule est dans une première étape d'introduction dans la mâchoire ;
- la figure 4 est une vue analogue à la figure 2 alors que la capsule est dans une seconde étape d'introduction dans la mâchoire ;
- la figure 5 est une vue analogue à la figure 2 alors que la capsule est en place dans la mâchoire et
- la figure 6 est une vue partielle en perspective d'un porte-fusible conforme à l'invention.
- Figure 1 is a perspective view of a jaw according to the invention;
- Figure 2 is a front view of the jaw of Figure 1 at rest;
- Figure 3 is a view similar to Figure 2 while a capsule is in a first step of introduction into the jaw;
- Figure 4 is a view similar to Figure 2 while the capsule is in a second step of introduction into the jaw;
- FIG. 5 is a view similar to FIG. 2 while the capsule is in place in the jaw and
- Figure 6 is a partial perspective view of a fuse holder according to the invention.
La mâchoire 1 visible aux figures 1 à 6 comprend une base
2 se prolongeant par une languette 3 destinée à être raccordée
à un conducteur électrique 4 schématisé par un trait d'axe et
appartenant à une ligne devant être connectée à un fusible 5
représenté en traits mixtes aux figures 1 à 5 et en traits
pleins à la figure 6.The
La base 2 se prolonge par deux pattes 21 et 22 qui
s'étendent selon une direction globalement perpendiculaire à la
base 2 et définissent entre elles un espace E de réception
d'une capsule cylindrique 6 formant une des bornes d'extrémité
du fusible 5.The
On note X1 l'axe de symétrie de la capsule 6, cet axe X1
étant disposé dans un plan médian P de l'espace E lorsque la
capsule 6 est en place dans la mâchoire 1, comme représenté aux
figures 1 et 5. On note D6 le diamètre de la capsule 6.X 1 is the axis of symmetry of the
On note P21 un plan globalement parallèle au plan P qui
constitue un plan central de la patte 21 dans sa partie
inférieure. De la même manière, on note P22 un plan équivalent
pour la patte 22.P 21 is a plane generally parallel to the plane P which constitutes a central plane of the
Conformément à l'invention, la patte 21 est pliée vers
l'extérieur du plan P21 par rapport à l'espace E, autour d'un
axe A21 globalement parallèle à l'axe X1 dans la configuration
des figures 1 et 5. A partir de l'axe A21, la patte 21 forme une
zone 21b déformée vers l'extérieur par rapport au plan P21 et
qui est concave en direction de l'espace E car elle est pliée,
autour d'un second axe C21 parallèle à l'axe A21, et dans un sens
opposé. La patte 21 est également pliée selon un axe D21 parallèle
à l'axe A21 et approximativement compris dans le plan P21.
On note respectivement 21e et 21f les surfaces définies entre
les axes A21 et C21 d'une part, C21 et D21 d'autre part. La zone
21b est formée des surfaces 21e et 21f. According to the invention, the
Au-delà de la ligne 21d, la patte 21 se prolonge par une
extrémité 21g pliée vers l'extérieur du plan P21.Beyond the
On note α l'angle au sommet de la zone 21b dans le plan
des figures 2 à 5 et β l'angle d'inclinaison vers l'extérieur
de l'extrémité 21g de la patte 21, c'est-à-dire son angle de
divergence par rapport au plan P.Α is the angle at the top of the
De la même manière, la patte 22 est pliée autour d'axes
A22, C22 et D22 parallèles aux axes A21, C21 et D21 et comprend deux
surfaces 22e et 22f s'étendant à l'extérieur du plan P22 par
rapport à l'espace E et définissant une zone 22b déformée vers
l'extérieur, entre les axes A22 et D22. Comme précédemment,
l'extrémité 22g de la patte 22 est pliée vers l'extérieur par
rapport au plan P22.In the same way, the
Comme il ressort plus particulièrement de la figure 5,
lorsque la capsule 6 est en place dans la mâchoire 1, il est
formé, sur la surface interne des pattes 21 et 22 tournée vers
l'espace E et respectivement au niveau des axes A21, D21, A22 et
D22, quatre lignes 21a, 21d, 22a et 22d de contact électrique
et d'appui mécanique entre les pattes 21 et 22 et la surface
radiale externe 6a de la capsule 6, ces lignes de contact étant
globalement parallèles à l'axe X1.As is more particularly apparent from FIG. 5, when the
Ainsi, et comme il ressort plus particulièrement de la
figure 5, l'effort d'appui élastique de la mâchoire 1 sur la
surface 6a est décomposée en quatre efforts élémentaires FA21,
FD21, FA22 et FD22, ces efforts étant globalement dirigés vers
l'axe X1.Thus, and as is more particularly apparent from FIG. 5, the elastic bearing force of the
En pratique, les lignes 21a et 22a sont formées par les
génératrices des faces internes des pattes 21 et 22 au niveau
des axes A21 et A22, ces génératrices étant définies respectivement
à la jonction entre la face interne de chaque patte 21 ou
22 dans sa partie 21c ou 22c parallèle au plan P21 ou P22 et la
surface 21e ou 22e. Les lignes 21d et 22d sont formées par les
génératrices des faces internes des pattes 21 et 22 au niveau
des axes D21 et D22, ces génératrices étant définies respectivement
à la jonction des faces internes des surfaces 21f et 21g
ou 22f et 22g.In practice, the
Dans le plan des figures 2 à 5, les traces des lignes 21a,
22a, 21d et 22d sont comprises dans deux secteurs angulaires Δ21
et Δ22 dont on note γ l'angle au sommet. L'angle γ est de
l'ordre de 24°, cette valeur donnant des résultats satisfaisants
sur une plage comprise entre 20 et 28°.In the plane of FIGS 2 to 5, the traces of the
Cette valeur d'angle γ relativement faible correspond au
fait que les pattes 21 et 22 sont relativement peu déformées en
flexion lors de la mise en place et de l'extraction de la
capsule 6. Les efforts à vaincre conservent donc une valeur
relativement faible, d'où un confort d'utilisation lors de la
mise en place et de l'extraction du fusible 5.This relatively low angle value γ corresponds to
fact that the
Grâce à cette disposition, les lignes de contact 21a, 22a,
21d et 22d sont suffisamment proches les unes des autres pour
que la surface 6a de la capsule 6 ne risque pas de pénétrer à
l'intérieur des zones 21b et 22b au point qu'un contact
surfacique ait lieu entre cette surface 6a et la surface
interne des zones 21b et 22b. En d'autres termes, la géométrie
des pattes 21 et 22 assure un double contact linéique entre ces
pattes et la capsule 6, y compris en cas de léger défaut
dimensionnel de la mâchoire 1 ou de la capsule 6.With this arrangement, the
Grâce à l'invention, le courant maximum susceptible de
transiter entre le fusible 5 et le conducteur 4 est divisé en
quatre au niveau des lignes 21a, 22a, 21d et 22d. En cas de
défaut géométrique de la capsule 6, l'une des lignes précitées
peut ne pas être en contact avec la surface 6a, le maintien
étant cependant correctement assuré grâce aux trois autres
lignes de contact qui définissent, avec la capsule 6, un
système isostatique. Dans tous les cas, on peut considérer que
le courant maximum transitant sur une ligne de contact entre la
surface 6a et une patte 21 ou 22 est au plus égal à un tiers,
voire un quart du courant de claquage du fusible, de telle
sorte que l'épaisseur e des pattes 21 et 22 peut être définie
en fonction de ce paramètre.Thanks to the invention, the maximum current capable of transiting between the
L'introduction de la capsule 6 dans la mâchoire 2 est
représentée aux figures 3 et 4. Au début de l'introduction, la
surface radiale externe 6a de la mâchoire 6 repose contre la
surface interne des extrémités 21g et 22g des pattes 21 et 22.
L'effort de poussée exercé par un utilisateur est représenté
par la flèche F2 et est reporté au niveau de la zone de contact
entre la surface 6a et les extrémités 21g et 22g, comme représente
par les flèches F3. Ces efforts F3 ont pour effet de faire
fléchir les pattes 21 et 22, comme représenté par les flèches
F4, alors qu'un effort de friction représenté par la flèche F5
est généré au niveau des surfaces en contact, 6a, 21g et 22g
dans la configuration de la figure 3. Les pattes 21 et 22
travaillent donc à la fois en flexion et en friction. Dans la
configuration de la figure 4, l'effort F2 que doit exercer
l'utilisateur vise essentiellement à écarter les pattes 21 et
22 par flexion, comme représenté par les flèches F4, car
l'effort de friction est sensiblement diminué du fait du
contact essentiellement linéique qui a alors lieu entre les
lignes 21d et 22d et la surface 6a. Cet effort n'est pas très
supérieur à l'effort qui doit être exercé dans la configuration
de la figure 3, alors même que les pattes 21 et 22 sont plus
fléchies.The introduction of the
On atteint lors de la position de la figure 5 où les
efforts FA21, FD21, FA22 et FD22 exercés selon les quatre lignes
21a, 21c, 22a et 22c sont dirigés vers l'axe X1 et bordent les
deux secteurs Δ21 et Δ22 d'angles au sommet γ dans le plan de la
figure 5. La capsule 6 est alors fermement immobilisée et ce,
d'autant plus qu'un ressort de maintien 7 peut être employé,
comme représenté à la figure 6.Is reached at the position of Figure 5 where the forces F A21, D21 F, F A22 and F D22 exerted along the four
On note d 1 la distance entre les lignes 21a et 22a d'une
part, 21d et 22d d'autre part, dans la configuration de la
figure 5. Compte tenu de la valeur relativement faible de
l'angle γ, la distance d 1 est légèrement inférieure au diamètre
D6, ce qui correspond au fait que les pattes 21 et 22 ne sont
que peu déformées en flexion lors de la mise en place de la
capsule 6.Note d 1 the distance between the
Lorsqu'il convient d'extraire le fusible 5, il suffit
d'exercer sur celui-ci un effort en sens inverse de l'effort
F2, les contacts entre la surface 6a et les lignes 21a et 22a
étant alors supprimés, de telle sorte qu'il demeure uniquement
les contacts linéiques au niveau des lignes 21d et 22d, un
mouvement pouvant être généré sans effort trop important, de
sorte que le fusible ne doit pas subir des efforts ou accélérations
pouvant résulter dans sa chute à l'extérieur du porte-fusible. When it is appropriate to extract the
Comme représenté à la figure 6, deux mâchoires 1 et 1'
peuvent être utilisées dans un porte-fusible en étant disposées,
en opposition, au niveau des deux capsules 6 et 6' d'un
fusible 5. Chaque mâchoire 1 ou 1' est reliée par une patte 3
ou 3' à un conducteur 4 ou 4'. Chaque mâchoire est associée à
un ressort 7 ou 7', en forme de pince, prévu pour exercer sur
les pattes 21 et 22 un effort F5 de pincement des capsules 6 ou
6'. L'effort F5 peut être relativement important, notamment
afin que le porte-fusible soit conforme aux normes en vigueur,
sans pour autant gêner la mise en place et l'extraction du
fusible, car cet effort F5 est transmis aux capsules 6 et 6'
par le contact linéique obtenu au niveau des lignes 21a, 22a,
21d et 22d.As shown in FIG. 6, two
Dans la configuration de la figure 6, le mouvement
d'introduction et d'extraction du fusible 5 dans les mâchoires
1 est un mouvement de pivotement autour d'un axe transversal Y,
ce mouvement étant représenté par la flèche F6. Compte tenu de
la direction de ce mouvement et pour limiter les efforts de
contact, les extrémités 21g et 22g comprennent chacune un bord
en biais 21h, 22h.In the configuration of Figure 6, the movement of introduction and extraction of the
Claims (10)
- Fuse holder clip comprising two lugs which are intended to define between them a space for receiving a fuse capsule with a circular section, characterised in that said lugs (21, 22) are folded according to the directions (A21, C21, D21, A22, C22, D22) parallel to a central axis (X1) of said capsule (6) in place in said clip (1), such that they each form two lines (21a, 21d, 22a, 22d) of electrical contact and mechanical support on a radial surface (6a) of said capsule, said two lines being overall parallel to said axis.
- Clip according to claim 1, characterised in that the traces of said two lines (21a, 21d, 22a, 22d) of electrical contact and of mechanical support in a plane perpendicular to said radial surface (6a) of said capsule are included in a sector which is centred on the trace of said central axis (X1) in this plane and has an angle at the top (γ) less than 30°.
- Clip according to claim 2, characterised in that said angle at the top (γ) is between 20 and 28°, preferably of the order of 24°.
- Clip according to one of the preceding claims, characterised in that each lug (21, 22) comprises, between said lines of contact (21a, 21d, 22a, 22d), a zone (21b, 22b) which is deformed towards the exterior with respect to a main plane (P21, P22) of said lug.
- Clip according to claim 4, characterised in that said deformed zone (21b, 22b) comprises two surfaces (21e, 21f, 22e, 22f) which are inclined with respect to said plane (P21, P22) and with respect to each other.
- Clip according to claim 5, characterised in that the angle at the top (α) of said deformed zone (21b, 22b) defined by said two inclined surfaces (21e, 21f, 22e, 22f) is between 80 and 100°, preferably of the order of 90°.
- Clip according to one of the preceding claims, characterised in that the ends (21g, 22g) of said lugs (21, 22) are divergent with respect to a median plane (P) of said clip (1).
- Clip according to claim 7, characterised in that the angle of divergence (β) of said ends (21g, 22g) is between 16 and 24°, preferably of the order of 20°.
- Clip according to one of the preceding claims, characterised in that it is associated with an external retaining spring (7) which abuts on said lugs (21, 22) at the level of the zones (21b, 22b) which are deformed towards the exterior, with respect to a main plane (P21, P22) of each lug, said zones being defined between said lines of contact (21a, 21d, 22a, 22d).
- Fuse holder equipped with at least one clip (1) according to one of the preceding claims.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907891A FR2795229B1 (en) | 1999-06-17 | 1999-06-17 | JAW FOR FUSE HOLDER AND FUSE HOLDER PROVIDED WITH SUCH A JAW |
FR9907891 | 1999-06-17 | ||
PCT/FR2000/001690 WO2000079555A1 (en) | 1999-06-17 | 2000-06-19 | Fuse-holder clip and fuse-holder equipped with same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1194943A1 EP1194943A1 (en) | 2002-04-10 |
EP1194943B1 true EP1194943B1 (en) | 2003-05-21 |
Family
ID=9547106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00951610A Expired - Lifetime EP1194943B1 (en) | 1999-06-17 | 2000-06-19 | Fuse-holder clip and fuse-holder equipped with same |
Country Status (14)
Country | Link |
---|---|
US (1) | US6692315B1 (en) |
EP (1) | EP1194943B1 (en) |
JP (1) | JP4398128B2 (en) |
AT (1) | ATE241212T1 (en) |
AU (1) | AU6449400A (en) |
CA (1) | CA2374184C (en) |
DE (1) | DE60002873T2 (en) |
DK (1) | DK1194943T3 (en) |
ES (1) | ES2198338T3 (en) |
FR (1) | FR2795229B1 (en) |
MX (1) | MXPA01013050A (en) |
NO (1) | NO320199B1 (en) |
PT (1) | PT1194943E (en) |
WO (1) | WO2000079555A1 (en) |
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DE102012011166A1 (en) | 2012-04-05 | 2013-10-10 | Dehn + Söhne Gmbh + Co. Kg | Device for shock-current resistant clamping contacting of electrical components |
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US1950557A (en) * | 1930-12-08 | 1934-03-13 | Square D Co | Pressure contact fuse clip |
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GB2096413A (en) * | 1981-04-07 | 1982-10-13 | Hayes Derek | A cartridge-fuse clip assembly |
US4472018A (en) * | 1983-02-16 | 1984-09-18 | Mcgraw-Edison Company | Fuse clip with enclosed wire connection |
-
1999
- 1999-06-17 FR FR9907891A patent/FR2795229B1/en not_active Expired - Fee Related
-
2000
- 2000-06-19 ES ES00951610T patent/ES2198338T3/en not_active Expired - Lifetime
- 2000-06-19 MX MXPA01013050A patent/MXPA01013050A/en active IP Right Grant
- 2000-06-19 DE DE60002873T patent/DE60002873T2/en not_active Expired - Lifetime
- 2000-06-19 CA CA002374184A patent/CA2374184C/en not_active Expired - Lifetime
- 2000-06-19 AT AT00951610T patent/ATE241212T1/en active
- 2000-06-19 DK DK00951610T patent/DK1194943T3/en active
- 2000-06-19 US US10/009,525 patent/US6692315B1/en not_active Expired - Lifetime
- 2000-06-19 JP JP2001505030A patent/JP4398128B2/en not_active Expired - Fee Related
- 2000-06-19 EP EP00951610A patent/EP1194943B1/en not_active Expired - Lifetime
- 2000-06-19 PT PT00951610T patent/PT1194943E/en unknown
- 2000-06-19 WO PCT/FR2000/001690 patent/WO2000079555A1/en active IP Right Grant
- 2000-06-19 AU AU64494/00A patent/AU6449400A/en not_active Abandoned
-
2001
- 2001-11-23 NO NO20015727A patent/NO320199B1/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012011166A1 (en) | 2012-04-05 | 2013-10-10 | Dehn + Söhne Gmbh + Co. Kg | Device for shock-current resistant clamping contacting of electrical components |
WO2013150128A1 (en) | 2012-04-05 | 2013-10-10 | Dehn + Söhne Gmbh + Co. Kg | Device for surge-current-resistant terminal contacting of electrical components |
Also Published As
Publication number | Publication date |
---|---|
FR2795229B1 (en) | 2001-08-03 |
US6692315B1 (en) | 2004-02-17 |
CA2374184C (en) | 2009-01-27 |
CA2374184A1 (en) | 2000-12-28 |
DE60002873D1 (en) | 2003-06-26 |
DE60002873T2 (en) | 2004-03-11 |
EP1194943A1 (en) | 2002-04-10 |
FR2795229A1 (en) | 2000-12-22 |
PT1194943E (en) | 2003-10-31 |
NO20015727D0 (en) | 2001-11-23 |
NO20015727L (en) | 2001-11-23 |
MXPA01013050A (en) | 2002-11-04 |
JP2003502816A (en) | 2003-01-21 |
AU6449400A (en) | 2001-01-09 |
WO2000079555A1 (en) | 2000-12-28 |
NO320199B1 (en) | 2005-11-14 |
ATE241212T1 (en) | 2003-06-15 |
DK1194943T3 (en) | 2003-09-15 |
JP4398128B2 (en) | 2010-01-13 |
ES2198338T3 (en) | 2004-02-01 |
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