EP3270403B1 - Fusible - Google Patents

Fusible Download PDF

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Publication number
EP3270403B1
EP3270403B1 EP17001184.5A EP17001184A EP3270403B1 EP 3270403 B1 EP3270403 B1 EP 3270403B1 EP 17001184 A EP17001184 A EP 17001184A EP 3270403 B1 EP3270403 B1 EP 3270403B1
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EP
European Patent Office
Prior art keywords
fusible conductor
fusible
fuse
cross
fuse according
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
EP17001184.5A
Other languages
German (de)
English (en)
Other versions
EP3270403A1 (fr
Inventor
Ulrich Haas
Thorsten FALKENBERG
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.)
Siba Fuses GmbH
Original Assignee
Siba Fuses GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siba Fuses GmbH filed Critical Siba Fuses GmbH
Priority to PL17001184T priority Critical patent/PL3270403T3/pl
Publication of EP3270403A1 publication Critical patent/EP3270403A1/fr
Application granted granted Critical
Publication of EP3270403B1 publication Critical patent/EP3270403B1/fr
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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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/12—Two or more separate fusible members in parallel
    • 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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/165—Casings
    • H01H85/175—Casings characterised by the casing shape or form
    • 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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified

Definitions

  • the invention relates to a fuse, preferably low-voltage fuse, preferably provided for use for a rated voltage range of greater than or equal to 900 V and / or for a rated current strength range of greater than or equal to 250 A, in particular for use in DC circuits, with an insulating body and with at least one strip-shaped Melting conductor, wherein the insulating body has a receiving area for receiving the fusible conductor.
  • a backup of the aforementioned type is already out of the DE 10 2014 212 068 A1 known.
  • the known fuse has an outside square and inside round insulating. In the receiving area a plurality of fusible conductors are provided, which may have different arrangements.
  • a disadvantage of the known fuse is that it can lead to damage of the insulator associated with the escape of hot sand from the insulator or even arcing in case of overload and short circuit. The above problem arises in particular with fuses for a high rated voltage range and / or a high rated current strength range.
  • a fuse arrangement is known in which the receiving region of the insulating body is at least substantially rectangular.
  • the individual fuse elements are arranged in a round recess of the insulating body.
  • the fusible elements themselves are arranged at a distance from the recess.
  • Object of the present invention is to provide a fuse of the type mentioned above, which is as small as possible especially when used for a high rated voltage range and / or a high rated current range, while ensuring that it is at overload and especially in the Short circuit case if possible not to damage the insulating body, in particular associated with the escape of hot sand or even to an arc outlet comes.
  • the above object is achieved by a fuse with the features of the subject of claim 1.
  • Advantageous developments are the subject of the dependent claims.
  • the invention relates to various investigations of fuses, in particular as known from the DE 10 2014 212 068 A1 are known, preceded.
  • a known fuse melts at a load above a predetermined time / current range at least one arranged in the fuse fuse inside the fuse to ultimately separate the circuit.
  • a switching arc usually occurs, the extent and duration of which depend on the characteristics of the circuit with respect to the voltage, the current, the time constant of the fault circuit and the presence of AC or DC voltage.
  • the known fuse is filled with an arc extinguishing agent surrounding the fusible conductor, which is typically quartz sand.
  • an arc extinguishing agent surrounding the fusible conductor typically quartz sand.
  • a non-conductive, fulgurite-like sintered body develops from the quartz sand surrounding the melt conductor.
  • the fault current is interrupted.
  • its cross section is substantially larger than that of the fusible conductor.
  • a strip-shaped fusible conductor having a cross-sectional area of 20 ⁇ 0.2 mm can easily lead to the formation of a sintered body having dimensions of 30 ⁇ 10 mm in cross section.
  • the reinforcement has proven to be costly. Furthermore, the approach has been taken to increase the receiving space to a greater distance of Melting conductor to the inner wall of the insulating body to have. However, this can lead to an increase in the dimensions of the insulating body and thus the fuse. Incidentally, it has been considered to change the dimensions of the fusible elements so that they have a smaller width and therefore a slightly greater thickness for the same cross-sectional area. This also ultimately leads to a greater spacing of at least the ends of the fusible conductor to the inner wall of the insulating body. In this context, however, it has been found that slightly thicker fusible links can ultimately adversely affect the response of the fuse.
  • the fuse according to the invention has a receiving region which has an at least substantially rectangular or rectangular shape in the cross section perpendicular to its longitudinal axis. Between each opposite corner regions of the receiving area extend diagonals of the receiving area.
  • the strip-shaped fuse element is now arranged at least substantially in a diagonal plane of the receiving region.
  • the arrangement on or in the region of the diagonal plane means in particular that one or more fusible conductors are preferably arranged only in the diagonal plane or, if necessary, in both diagonal planes and not outside the diagonal plane.
  • At least one fusible conductor which is arranged at least substantially in a diagonal plane of the receiving area
  • at least one further fusible conductor may be provided, which is not arranged in a diagonal plane of the receiving area.
  • a single fusible conductor extends in its widthwise extension in particular diagonally from corner to corner of the rectangular or rectangular receiving area.
  • the properties of the fuse according to the invention have a particularly advantageous effect if, instead of a single fusible conductor, a plurality of fusible conductors is provided.
  • a plurality of fusible conductors is provided.
  • up to four fusible conductors are arranged at least substantially in at least one diagonal plane of the receiving region.
  • two fusible conductors it is preferable in this case for two fusible conductors to be arranged in each case on one of the two diagonal planes, so that the result is a star-shaped arrangement of the fusible conductors in cross section.
  • up to eight fusible conductors are provided, it being preferred that in each case four fusible conductors are arranged on one of the two diagonal planes, so that the result is a star-shaped arrangement of the fusible conductors, in particular analogously to the use of four fusible conductors in the Cross section results.
  • two fusible conductors are arranged one behind the other on one leg of the star, so that in particular the star has four legs, each with two fusible conductors per leg.
  • the heat output can be improved due to this embodiment.
  • a plurality of fusible conductors can be provided in the two diagonal planes, wherein preferably the number of fusible conductors on one of the two diagonal planes is selected to be identical. Furthermore, it is advantageously such that in a star-shaped arrangement of the fusible conductor in cross-section, the legs of the star each have the same number of fusible conductors, wherein the star-shaped arrangement has four legs.
  • the advantage of an enlarged or rectangular or rectangular cross-sectional profile is particularly effective when the width of the fusible conductor is less than or equal to the radius of the inscribed circle of the rectangular or rectangular cross-sectional profile of the receiving area.
  • a resulting, hot sintered body, which forms along or in the region of the fusible conductor, can be in the radial direction in the corner region of the rectangular or rectangular receiving area expand, so that no planar heating of the housing wall of the insulating takes place, but the high temperatures of the arc or the sintered body act at best selectively on the housing corners of the insulator.
  • the distance of the fusible conductor to the inner wall and the housing corners is at least 3 mm.
  • the receiving area has a square or square cross-sectional shape.
  • the sides of the receiving area are formed in this case at least substantially the same length.
  • a square or square-shaped cross section of the receiving area allows an arrangement of a plurality of fusible conductors, in which the fusible conductors are arranged at equal angles to each other.
  • for a resulting sintered body is in such an arrangement an increased space not only along the diagonal planes in the corner regions of the receiving area inside, but also between the fusible elements themselves. It comes so even with a strong thickness growth of the sintered body only in the edge region of the fusible conductor in the middle in the insulating body to a touch of the sintered body adjacent fusible link.
  • the sides of the receiving area have a section in the shape of a curve in the form of a section of a section.
  • at least one side of the rectangular receiving area is arc-shaped, in particular arc-shaped, formed. This is particularly preferably the case with two in particular opposite sides or even on all sides. As a result, the volume of the receiving area is further increased.
  • opposite sides of the receiving area each have the same radii of curvature.
  • all sides have an identical radius of curvature.
  • the radius of curvature of one side preferably corresponds to its width.
  • the curvature radius also increases with the side length.
  • the ratio of radius of curvature and side length may be proportional, but both values may be in a different relationship with each other.
  • the transition region between two adjacent sides of the receiving region is rounded and preferably has a smaller radius of curvature than the adjacent or adjacent sides. This is supported in particular by a curved-section-shaped form of the adjacent sides, since the curvature of one side can pass directly into the curvature of the corner region. As a result, the stability of the insulating body can be further increased.
  • the insulating body can absorb higher internal pressure forces in the transitional region between two sides of the receiving region or divert forces occurring more uniformly over the surface of the inner wall.
  • the insulating body in the corner region of the receiving area has a greater material thickness than would be the case with a tapered corner region.
  • the insulating body in the vertical to its longitudinal axis cross-section on the outside an at least substantially rectangular or rectangular shape.
  • the insulating body thereby has at its corners a particularly high wall thickness.
  • this is the region of the insulating body which comes closest to the fusible conductors and thus possibly to the hot sintered body. Due to the high material thickness in this area, the stability of the insulating body is thus increased, especially at critical points.
  • the fusible conductor is usually made of an electrically highly conductive material or has such.
  • silver has particularly suitable properties in this regard.
  • the fusible conductor in the fuse according to the invention preferably has a solder whose melting point is in particular lower than the melting point of the other materials of the fusible conductor, in particular of the decisive material for electrical conductivity , such as silver.
  • the individual fusible conductor preferably has at least one constriction, in particular in the form of a constriction web, with a reduced cross-section of the conductor.
  • it will be the first due to the higher current density in the region of such a bottleneck to a sharp rise in temperature above the melting range and thus to a melting of the fusible conductor.
  • the fusible conductor has one or more bottleneck rows each having a plurality of bottlenecks, by which the fusible conductor is ultimately segmented.
  • the current density in the other bottlenecks of the same bottleneck row increases after the melting of a first throat web in one of the bottleneck rows. This continues with each further melting throat bridge until it completely breaks the fusible conductor.
  • the current increases so rapidly that it comes to almost simultaneous evaporation of all bottlenecks of the bottleneck row.
  • several bottleneck rows can evaporate.
  • the number of bottleneck rows determines the rated voltage of the fuse. At the rated voltage then in particular all bottleneck rows evaporate.
  • the receiving area is preferably filled with an arc extinguishing agent, which surrounds the fuse element or the.
  • Sand in particular, preferably quartz sand, is a suitable material for this purpose.
  • sintering of the arc extinguishing agent now occurs, as a result of which the insulating sintered body described above is produced.
  • the sintered body also grows over a certain area along the fusible conductor, that is to say in the axial direction. Due to the volume increase of the sintered body in the receiving area, which occurs both in the axial and in the radial direction, the hot material of the sintered body gets closer to the inner wall of the insulating body. A consequently occurring surface heating of the housing wall of the insulating body can ultimately lead to damage in the form of cracking or bursting.
  • the invention finally comes in, by which the sintered body is given a larger volume into which it can expand. Furthermore, the insulating body is better protected by a greater spacing from the broad side of the fusible conductor and the arc occurring in the region of the fusible conductor in the event of triggering the occurring high temperatures, which may also have a damaging effect.
  • flange plates are provided for external contacting of the fuse end.
  • the flange plates are electrically connected inside the fuse with the fusible conductor and, in comparison to the fusible conductor, usually have a greater material thickness for a lower current density.
  • the arc also develops in the axial direction of the fusible conductor and can reach into the region of the contact point between the enamel conductor end and flange plate. In this case, it can penetrate the flange plate in the extreme case and even escape from the flange plate to the outside and cause damage in the vicinity of the fuse.
  • an electrically insulating material is provided in a preferred embodiment of the fuse according to the invention in the connection region of the fusible conductor with the flange plates and / or on the fusible conductor itself.
  • silicone which, due to its gelatinous or pasty consistency, can be applied in the form of beads of material in the region of the contact point and / or on the melt conductor.
  • a star-shaped arrangement entails the advantage that an application of the aforementioned silicone beads or of another insulating material in the region of Contact point between the fusible conductor and the flange plate and / or on the fusible conductor even after the completion of the fuse link from one or more flange plates and the fusible conductors is possible.
  • At least one further fusible conductor is arranged in a gap, wherein the gap between two diagonals extending to the corner regions results.
  • up to four fusible conductors are arranged at least substantially in the receiving region, preferably so that in each case two fusible conductors are arranged on a diagonal plane, in particular wherein the at least one further fusible conductor between two fusible conductors, that is in particular in which between two adjacent fusible conductors resulting gap, is provided.
  • four more fusible conductors are provided, so that preferably results in the cross-section of the shape of an eight-legged star.
  • the rated current can be increased.
  • the fusible conductor and the further fusible conductor have an at least substantially the same distance from the wall or to the inner wall of the insulating body and / or the housing corners. Furthermore, in a further preferred embodiment it is provided that the further fusible conductor has a different, preferably smaller width than the fusible conductor, in particular wherein the further fusible conductor is less than 80%, preferably less than 70%, more preferably less than 60% and in particular at least Substantially 50%, the width of the fusible conductor has.
  • the at least one further fusible conductor has at least substantially the same width as the fusible conductor.
  • the fusible conductors and / or the further fusible conductors are arranged so that the arrangement in the cross-sectional representation is mirror-symmetrical with respect to a vertical and / or horizontal line.
  • the fusible conductor has a width in the range from 5 to 50 mm, preferably from 5 to 40 mm, more preferably from 10 to 30 mm. If, in a preferred embodiment, four fusible conductors are arranged in each case in one of the two diagonal planes, that is to say a total of eight fusible conductors are arranged in the receiving region, then it is preferably provided that a fusible conductor a width of 5 to 15 mm, preferably of at least substantially 10 mm.
  • a fusible conductor has a width in the range of 10 to 25 mm, preferably of at least substantially 20 mm. If at least one further fusible conductor is arranged in the intermediate spaces between the diagonals, it is preferably provided that the further fusible conductor has a width in the range from 5 to 20 mm, preferably from 5 to 15 mm, more preferably from 8 to 12 mm, more preferably further from 8 to 10 mm, in particular wherein the further fusible conductor is arranged between the intermediate space in two adjacent fusible conductors.
  • the further fusible conductors have a smaller width, as stated above, than the fusible conductors and / or have a larger distance to the center of the receiving area than the fusible conductors.
  • the center of the receiving area can be in other embodiments, the center of the star-shaped arrangement of the fuse element in cross section.
  • FIG Fig. 1 A preferred embodiment of a fuse 1 according to the invention is shown in FIG Fig. 1 shown in cross section.
  • the sectional plane extends perpendicular to the longitudinal axis of the fuse 1 and is in the side view of the fuse 1 according to Fig. 5 located.
  • the exterior of the fuse 1 is formed by an insulating body 2.
  • the insulating body 2 consists in the present case of a ceramic material which has good electrical insulation properties.
  • the electrically conductive connection through the fuse 1 is made possible in the example shown by four internal fuse elements 3, which are arranged in a receiving region 4 of the insulating body 2.
  • the receiving area 4 which incidentally with an arc extinguishing agent, not shown, which is particularly preferably sand, especially quartz sand, preferably extends over almost the entire length of the insulating body 2 and has in the cross section shown here a rectangular or even square Shape up. According to the diagonals extending between opposite corner regions 5 of the receiving region 4, diagonal planes extending in the longitudinal direction of the fuse 1 or the receiving region 4 extend in which the strip-shaped fuse elements 3 extend. As, moreover, from the Fig. 1 to 3 results, are outside the diagonal planes no strip-shaped fuse element. 3
  • the fusible links 3 are further spaced from the inner wall 6 than in the case of a receiving area 4 with an oval or circular cross-sectional shape.
  • each two fuse links 3 extend on one of the two diagonal planes, so that a total of four fuse links 3 are arranged in the receiving area 4, wherein a leg of the four-legged star-shaped cross-sectional shape is formed by a fuse element 3.
  • Fig. 2b shows that four fusible conductors extend on one of the two diagonal planes, so that a total of eight fusible conductors 3 are arranged in the receiving region 4, wherein a leg of the four-lobate star-shaped cross-sectional shape is formed by two fusible links 3.
  • FIG Fig. 2a and 2b A comparison of the cross-sectional shape according to the invention with a round shape of the receiving area 4 is shown in FIG Fig. 2a and 2b played. There is the course of the inner wall 6 of in Fig. 1 shown fuse 1 dashed lines. Based on the illustrations according to Fig. 2a and 2b is immediately apparent the advantage of the present invention. Due to the square-shaped or rectangular shape of the receiving area 4 in conjunction with an arrangement of the fuse element 3 on the diagonal of the receiving area 4 in cross-section, an increased space in the corner regions 5 is available.
  • the receiving region 4 is filled with the arc extinguishing agent, not shown, which rapidly causes an occurring arc in the event of an overload to form an insulating sintered body.
  • the formation of the sintered body is associated with a large increase in volume.
  • the volume of the sintered body also increases in the direction of the inner wall 6 of the insulating body 2.
  • Fig. 2a and 2b is illustrated, is the sintered body in the inventive design of the receiving area 4 with a rectangular or square-shaped cross-section compared to a round cross section, a larger clearance available.
  • FIG. 2a and 2b show, moreover, that in cross-section the inner wall 6 of a cylindrical receiving area 4 of a known securing device 1 with a round cross-sectional profile preferably runs on the incircle of the cross-sectional profile of the receiving area 4 according to the invention.
  • the width of the fuse element 3 arranged according to the invention is therefore in particular smaller than the radius of the inscribed circle of the rectangular or. rectangular, or in the illustrated case square-like, cross-sectional profile of the receiving area 4 in the inventive fuse 1.
  • the distance between the fusible conductor 3 to the inner wall 6 is preferably more than 3 mm.
  • FIG. 3 also shown in cross-section, alternative embodiment of the fuse 1 according to the invention has a fundamentally comparable structure as in Fig. 1 shown embodiment.
  • the receiving area 4 in its cross-sectional profile is not square-shaped, but rectangular.
  • Fig. 1 Basically, however, is the in Fig. 1 shown preferred design.
  • the fusible conductors 3 each have uniform angles to one another.
  • the fusible conductors 3 the largest possible or equally large free volume into which an emerging, hot sintered body can push in as a result of its thickness growth.
  • the available volume in the receiving area 4 can be further increased if at least one side 7 of the cross-sectional profile of the receiving area 4 is formed in the shape of a portion of an arc.
  • there a circular arc section shape is preferred.
  • another shape for example parabolic or hyperbolic, may be provided.
  • all sides 7 of the receiving region 4 have a bow-shaped form, wherein in particular the radius of curvature of all sides 7 is identical.
  • Fig. 3 in that, in the case of a rectangular receiving area 4, in particular the opposite sides each have the same radii of curvature.
  • the radius of curvature of a page 7 corresponds in particular with the length of the page 7.
  • the example according to Fig. 3 illustrates that with increasing side length preferably also the radius of curvature increases, so that the result is the rectangular shape of the receiving area 4.
  • the corner region 5 between two adjacent sides 7 is preferably rounded and in particular has a smaller radius of curvature than the adjacent or adjacent sides 7.
  • the receiving area 4 in its cross-sectional profile preferably has the shape of a bulbous rectangle or square with rounded Corners on.
  • the described shape of the receiving area 4 leads to an increased material thickness of the insulating body 2 in the corner region 5, that is, in the area in which the sintered body in its formation mainly expands. Occurring forces and temperatures which act on the inner wall 6 of the insulating body 2, in particular in the corner region 5, can be absorbed to a greater extent and derived or distributed to the insulating body 2.
  • a typical fusible conductor 3 is in Fig. 4 shown.
  • the fusible conductor 3 consists of an electrically highly conductive material, in the present case silver, and moreover has a solder whose melting point is lower than the melting point of the further material of the fusible conductor 3.
  • the melting of the fusible conductor 3 in the overload or short circuit occurs in particular at bottlenecks, which are formed in the example shown as bottleneck webs 8 and in which the current flow through the fusible conductor 3 is the highest current density.
  • the illustrated fusible conductor 3 has a plurality of bottlenecks 8, which are arranged in a plurality of bottleneck rows 9, which divide the fusible conductor 3 into a plurality of continuous segments 10.
  • the quadruple current strength now lies on the last remaining fusible conductor 3, as a result of which this fusible conductor 3 ultimately melts.
  • the conductive connection via the fuse element 3 is separated by the fuse 1.
  • the process described above occurs in the event of an overload, ie at a load current above the rated current, and takes place at different speeds depending on the extent of the overload.
  • the short circuit case is characterized by an extremely high and rapid increase in current, so that there is an almost simultaneous evaporation of all bottlenecks 8 a Bottleneck row 9 or even the evaporation of several bottleneck rows 9 comes.
  • the fusible conductors 3 which extend at least substantially over the entire length of the insulating body 2 or of the receiving region 4, are conductively connected at the ends to the flange plates 11.
  • fuse 1 may under certain circumstances in the region of the electrically conductive connection between a fuse element 3 and a flange 11 of the arc to expand.
  • such an arc can be relatively durable and in the limiting case, the flange plate 11 melt or strike through.
  • an electrically insulating material may be provided here.
  • silicone is used, which is available for a cost and on the other hand is easy to apply by its pasty consistency in said area. Insulating material beads 13 are therefore preferably applied or applied in the area of the contacting of the fusible conductor 3 with the flange plates 11, as in FIG Fig. 5 is shown.
  • the inventive star-shaped arrangement of the fuse element 3 allows an application of the electrically insulating material in the form of material beads 13 even in the already mounted state of the fuse from the Fusible conductors 3 and connected to the fuse links 3 flange 11.
  • Fig. 6 shows that at least one further fusible conductor 14 is provided in a gap which results between the two diagonals.
  • four fuse elements 3 extend at least substantially along the two diagonals in the receiving region 4. Between adjacent fusible conductors 3 at least one further fusible conductor 14 is provided in the thus resulting gap.
  • Fig. 6 shows four fusible conductor 3 and four further fusible conductor 14.
  • the fusible conductor 3 and the other fusible conductor 14 at least substantially the same distance to the inner wall 6 and / or the housing corners or corner regions 5 and / or the sides 7. Consequently, at least substantially the same distance to the wall of the receiving area 4.
  • Fig. 6 shows that at least one further fusible conductor 14 is provided in a gap which results between the two diagonals.
  • four fuse elements 3 extend at least substantially along the two diagonals in the receiving region 4. Between adjacent fusible conductors 3 at least one further fusible conductor 14 is provided in the thus resulting gap.
  • Fig. 6 shows four fu
  • the at least one further fusible conductor 14 can have a different width than the fusible conductor 3.
  • the further fusible conductor 14 has a smaller width than the fusible conductor 3.
  • the further fusible conductor 14 can have approximately half the width of the fusible conductor 3.
  • Fig. 6 shows Fig. 6 in that the further fusible conductors 14 are arranged at a distance from the center of the receiving region 4, in particular the midpoint of the star-shaped cross-sectional shape, wherein they are likewise spaced apart, in particular at a sufficiently great distance from the fusible conductors 3.
  • the further fusible conductors 14 have a larger distance to the center of the receiving area 4 than the fusible links 3.
  • the fusible conductor 3 has a width of approximately 20 mm and that the further fusible conductor 14 has a width of approximately 10 mm.

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  • Fuses (AREA)

Claims (14)

  1. Fusible (1), de préférence fusible à basse tension, de préférence destiné à être utilisé pour une zone de tension de mesure supérieure ou égale à 900 V et/ou pour une zone d'intensité de courant de mesure supérieure ou égale à 250 A, en particulier pour une utilisation dans un circuit de tension continue, comprenant un corps isolant (2) et comprenant au moins un conducteur fusible en forme de ruban (3), dans lequel le corps isolant (2) présente une zone de réception (4) pour la réception du conducteur fusible (3),
    dans lequel la zone de réception (4) présente, dans sa section transversale perpendiculaire à son axe longitudinal, une forme au moins essentiellement rectangulaire ou de type rectangulaire avec des diagonales s'étendant entre les zones de coin (5),
    caractérisé en ce que
    le au moins un conducteur fusible (3) est disposé au moins essentiellement dans un plan diagonal le long des diagonales de la section transversale perpendiculaire à l'axe longitudinal de la zone de réception (4) et le long de l'axe longitudinal et en ce qu'une pluralité de conducteurs fusibles (3), en particulier jusqu'à quatre ou huit conducteurs fusibles (3), est disposée au moins essentiellement dans un plan diagonal le long des diagonales de la section transversale perpendiculaire à l'axe longitudinal de la zone de réception (4) et le long de l'axe longitudinal de la zone de réception (4).
  2. Fusible selon la revendication 1, caractérisé en ce que la largeur du conducteur fusible (3) est inférieure ou égale au rayon du cercle intérieur du profil en section transversale rectangulaire ou de type rectangulaire de la zone de réception (4) et en ce que, de préférence, les conducteurs fusibles (3) sont disposés uniquement dans un plan diagonal.
  3. Fusible selon la revendication 1 ou 2, caractérisé en ce que la zone de réception (4) présente une forme en section transversale carrée ou de type carré.
  4. Fusible selon une quelconque des revendications précédentes, caractérisé en ce qu'au moins un côté (7), de préférence deux côtés en particulier opposés (7), préférablement tous les côtés (7) de la zone de réception (4) rectangulaire sont conçus en forme de section d'arc, en particulier en forme de section d'arc de cercle.
  5. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que des côtés opposés (7) de la zone de réception (4) présentent respectivement des rayons de courbure identiques.
  6. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que la zone de coin (5) entre deux côtés voisins (7) est arrondie et présente un rayon de courbure plus petit que les côtés voisins (7).
  7. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que le corps isolant (2) présente, dans sa section transversale perpendiculaire à son axe longitudinal, côté externe, une forme au moins essentiellement rectangulaire ou de type rectangulaire.
  8. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que le conducteur fusible (3) présente un fil à plomb, dont le point de fusion est de préférence inférieur au point de fusion de l'autre matériau du conducteur fusible (3).
  9. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que le conducteur fusible (3) présente au moins un rétrécissement, en particulier une traverse de rétrécissement (8), avec une section transversale de câble rétrécie, de préférence une ou plusieurs séries de rétrécissement (9) présentant chacune une pluralité de traverses de rétrécissement (8).
  10. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que la zone de réception (4) est remplie par un matériau de soufflage d'arc, en particulier du sable, entourant le conducteur fusible (3).
  11. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que des plaques à bride (11) côté extrémité sont prévues pour une mise en contact externe du fusible (1).
  12. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que le conducteur fusible (3) est relié, côté extrémité, avec la plaque à bride (11) de façon conductrice.
  13. Fusible selon une quelconque des revendications précédentes, caractérisé en ce que, dans la zone d'extrémité du conducteur fusible (3), de préférence, un matériau électriquement isolant, en particulier de la silicone, est prévu.
  14. Fusible selon une quelconque des revendications précédentes, caractérisé en ce qu'au moins un autre conducteur fusible (14) est prévu, dans lequel l'autre conducteur fusible (14) est disposé dans un espace intermédiaire se trouvant entre les diagonales s'étendant entre les zones de coin (5), en particulier dans lequel l'autre conducteur fusible (14) présente une autre largeur, de préférence inférieure, à celle du conducteur fusible (3).
EP17001184.5A 2016-07-14 2017-07-12 Fusible Active EP3270403B1 (fr)

Priority Applications (1)

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PL17001184T PL3270403T3 (pl) 2016-07-14 2017-07-12 Bezpiecznik

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016008489 2016-07-14
DE102016008954 2016-07-26
EP17001148 2017-07-05

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EP3270403A1 EP3270403A1 (fr) 2018-01-17
EP3270403B1 true EP3270403B1 (fr) 2018-12-26

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EP17001184.5A Active EP3270403B1 (fr) 2016-07-14 2017-07-12 Fusible

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EP (1) EP3270403B1 (fr)
DE (1) DE202017006915U1 (fr)
ES (1) ES2716929T3 (fr)
PL (1) PL3270403T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018009183A1 (de) 2018-11-23 2020-05-28 Siba Fuses Gmbh Verwendung einer Sicherung für eine Gleichstromübertragung
DE102019005664A1 (de) * 2019-06-25 2020-12-31 Siba Fuses Gmbh Schmelzleiter sowie Sicherung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164750U (fr) * 1979-05-15 1980-11-26
JPS5921500Y2 (ja) * 1982-03-19 1984-06-25 三王株式会社 リ−ド付き超小型ヒュ−ズ
DE102012210292A1 (de) 2012-06-19 2013-12-19 Siemens Aktiengesellschaft Schmelzsicherungsanordnung
DE102014212068A1 (de) 2014-06-24 2014-12-11 Siemens Aktiengesellschaft Schmelzsicherung und Verfahren zur individuellen Einstellung eines Bemessungsstromes einer Schmelzsicherung

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* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3270403A1 (fr) 2018-01-17
DE202017006915U1 (de) 2018-10-30
PL3270403T3 (pl) 2019-07-31
ES2716929T3 (es) 2019-06-18

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