EP1729317B1 - Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique - Google Patents

Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique Download PDF

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Publication number
EP1729317B1
EP1729317B1 EP05011930A EP05011930A EP1729317B1 EP 1729317 B1 EP1729317 B1 EP 1729317B1 EP 05011930 A EP05011930 A EP 05011930A EP 05011930 A EP05011930 A EP 05011930A EP 1729317 B1 EP1729317 B1 EP 1729317B1
Authority
EP
European Patent Office
Prior art keywords
core
plastic material
fusible
conductive wire
fusible conductor
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 - Fee Related
Application number
EP05011930A
Other languages
German (de)
English (en)
Other versions
EP1729317A1 (fr
Inventor
Ludger Richter
Manfred Rupalla
Peter Pösnicker
Uwe RÖDER
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.)
Wickmann Werke GmbH
Original Assignee
Wickmann Werke 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 Wickmann Werke GmbH filed Critical Wickmann Werke GmbH
Priority to DE502005001781T priority Critical patent/DE502005001781D1/de
Priority to EP05011930A priority patent/EP1729317B1/fr
Priority to CNA2006100930129A priority patent/CN1873875A/zh
Priority to JP2006154828A priority patent/JP4733570B2/ja
Priority to US11/421,978 priority patent/US20070132539A1/en
Publication of EP1729317A1 publication Critical patent/EP1729317A1/fr
Application granted granted Critical
Publication of EP1729317B1 publication Critical patent/EP1729317B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H85/38—Means for extinguishing or suppressing arc
    • H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
    • 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
    • H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V
    • 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
    • H01H85/18—Casing fillings, e.g. powder
    • H01H85/185—Insulating members for supporting fusible elements inside a casing, e.g. for helically wound fusible elements

Definitions

  • the invention relates to a winding fuse for a fuse element with an electrically insulating or high-resistance core around which at least one fuse wire is wound. Furthermore, the invention relates to methods for producing such a winding winding conductor.
  • Wickelschmelzleiter the type mentioned are used for some time in fuse components.
  • a fusible conductor wire is wound around a core made of a plurality of glass fibers, wherein a predetermined winding density is to be maintained in order to achieve desired properties.
  • Such a prefabricated winding fusible conductor is then cut to a predetermined length and introduced, for example, in a ceramic tube and thereby electrically connected to the electrically conductive end caps, which are placed on the tube and mechanically fastened at the same time.
  • electrical and mechanical attachment of the winding fusible conductor is soldered, for example, to the end caps.
  • a fuse component in which a fused by an insulating ceramic sheath fuse wire spirally around a insulating core is wrapped around.
  • the insulating ceramic cladding surrounding the fuse wire limits the propagation of the metal vapor as the fuse wire is severed.
  • the insulated fuse wire can be fixed on the insulating core by means of an enamel layer and additionally supported by a cladding material. It has been found that the fuse components using a winding fusible conductor have a lower switching capacity than fuse components using a conventional wire melting conductor. This is due in particular to an insufficient extinction of the arc generated during shutdown.
  • the object of the invention is therefore to provide a fuse component with a winding fuse, which shows an improved turn-off.
  • the winding fusible conductor for a fuse element with an electrically insulating or high-resistance core, on which at least one fuse wire is wound, wherein the core has gaps, pores or other spaces, is characterized in that a temperature-resistant plastic is applied to the core such that at least the covered between the fusible wire exposed surface areas of the core of the plastic and the interstices formed between the wound fuse wire and the surface of the core (ie columns) and at least the outer interstices of the core with the plastic substantially (ie, at least so far that no capillary caused will be filled out).
  • the invention is based on the recognition that the breaking capacity is worsened by residues of the flux used in the soldering of the fusible wire, these remainders being due to the fact that the flux during soldering due to capillary action in gaps and interspaces of the Core or between the wound fuse wire and the surface of the core penetrate.
  • a temperature-resistant plastic according to the invention constitutes a "seal" of the gaps and spaces which prevents penetration of the flux.
  • a winding fusible conductor is produced by first impregnating a core with a non-cured liquid plastic material, wherein the surface of the core is coated with a layer of the plastic material, then the impregnated core is wrapped with the fusible conductor wire prior to curing of the plastic material and finally the Plastic material is allowed to harden, so that a temperature-resistant plastic is formed.
  • the amount of uncured plastic liquid material in the core can be sized so that when wrapping the core, all gaps and gaps between the fuse wire core and inside the core are closed, but the outwardly facing surfaces of the fuse wire remain free , This has the advantage that the winding fusible conductor remains solderable without the need to first remove the plastic.
  • the fuse wire is first wound on the core. Subsequently, the winding conductor is coated with a not yet cured liquid plastic material so that the plastic material can penetrate into spaces between the fuse wire and the core and in the pores, gaps or other spaces of the core. Then the plastic material hardens, so that a temperature-resistant plastic is formed.
  • This alternative method offers the advantage that a conventional winding fusible conductor can be used as the starting material.
  • the flux can no longer penetrate into the spaces between the fusible conductor wire and core and into the core, as a result of which Switching capacity is improved.
  • the fuse wire is fixed after curing of the plastic on the core, which allows higher winding densities of, for example, over 60%.
  • the core is comprised of a plurality of glass and / or ceramic fibers, with the interstices between the individual fibers also being substantially filled by the plastic.
  • the cores of a plurality of parallel glass or ceramic fibers are compressed during winding, so that - in the first manufacturing process alternative - after a prior impregnation of the fibers with the plastic material, a part of the plastic material is pressed out during winding from the core and remains between the wire windings. If a relatively large excess of the liquid plastic material remains, then the excess plastic material can be subsequently removed by mechanical stripping of the winding fusible conductor.
  • the plastic material used is a silicone which is applied in the liquid state and cured later.
  • the cured silicone is temperature resistant.
  • one or more arc-quenching materials are mixed, preferably a melamine powder. This additionally supports the arc-quenching effect of the silicone coating.
  • FIG. 1 is a schematic representation of a section of a winding fusible conductor 1 according to the invention.
  • a fusible conductor wire 2 is wound on an insulating or high-resistance core 3.
  • the fuse wire 2 is, for example, a wire made of a tin-plated silver-copper alloy core having a circular cross section and a diameter in the range of 0.05 mm to 0.5 mm.
  • the cross section need not be circular, but it can be wound, for example, a metal strip. Thinner or thicker wires are also conceivable depending on the desired properties.
  • the core 3 could for example consist of a more or less flexible rod of an insulating material (eg glass, glass ceramic, plastic or ceramic) or high-resistance material (eg semiconductor or high-resistance metal conductor).
  • the core is a bundle of glass and / or ceramic fibers.
  • the core is glass fiber, i. H. a bundle of twisted or spun glass fibers. In the raw state, the glass fibers of the glass silk lie relatively loosely together, so that many spaces are formed. When wrapping the glass core 3 with the fuse wire 2, the glass fiber is compressed, d. H. The individual glass fibers are pressed together.
  • the core 3 is soaked before wrapping with a (still) liquid silicone plastic, so that fill the spaces between the glass fibers with the plastic material.
  • a (still) liquid silicone plastic so that fill the spaces between the glass fibers with the plastic material.
  • the outer layers of the glass silk fill with the plastic, so that the glass silk is sealed so that no more liquids in the possibly still existing inner spaces can get.
  • a part of the plastic material is pushed out of the glass fiber and remains on the core 3 and fills the gaps (gaps) between the fuse wire 2 and the core 3. Remains too much excess plastic material, it can be stripped in still liquid state of the winding fusible conductor 1.
  • FIG. 1 shows the remaining plastic material 4 between the individual turns of the fusible conductor wire 2.
  • the plastic hardens, wherein hardening in the sense of setting is to be understood.
  • the plastic material does not need to be hard.
  • the cured temperature-resistant plastic preferably remains soft or elastic, so that the winding fusible conductor 1 remains flexible.
  • a silicone is preferably used, wherein the silicone material for example consists of two components, which are mixed before application.
  • arc-quenching materials in particular melamine powder, are added to the silicone.
  • ten parts of silicone resin are mixed with four parts of melamine powder.
  • FIG 2 shows a schematic representation of a fuse element 5, in which the winding fuse 1 according to the invention is used.
  • the winding fusible conductor 1 comprises a core 3 onto which the fuse wire 2 is wound and in which the spaces between the turns of the fuse wire 2 are filled with the plastic material 4.
  • the applied plastic material 4 is shown for clarity only on the left half of the winding fusible conductor 1.
  • the fuse 5 comprises an insulating tube 6 made of glass, plastic or ceramic, in the interior 7 of the Wikkelschmelzleiter 1 is included.
  • the tube 6 may have a round or rectangular cross-section.
  • the interior 7 may be filled with air, gas filled, empty or filled with another material.
  • Two end caps 8 are placed on the ends of the tube 6 (eg, soldered or glued on).
  • the fusible conductor 1 is soldered onto the bottoms of the end caps 8, the solder being shown schematically in FIG. 2 by the solder regions 9. But the solder joint can also be much smaller than it is shown in Figure 2 with the hatched areas 9.
  • the hatched area 9 may in this case also be a sealing material which is introduced into the end caps.
  • winding fusible conductor 1 is soldered onto the inner bottoms of the end caps 8, a flux is of course used in addition to the solder.
  • the inventive sealing of the fusible conductor 1 by means of the plastic material 4 prevents melted or liquid parts of the flux from migrating along the winding fusible conductor due to the capillary action. Such no longer removable flux residues would form a source of carbon and, in the event of shutdown (severing) of the fusible conductor, form conductive bridges which assist in reigniting the arc in the succeeding halfwaves.
  • FIG. 3 shows an alternative embodiment of a fuse component 10.
  • Two contact pins 12 are led through a base 11.
  • a protective cap 13 is placed on the base 11.
  • the ends of the connecting pins 12 open into terminal lugs 14, to each of which one end of a winding semiconductor conductor 1 is attached.
  • the winding fusible conductor 1 is attached to the terminal lugs 14, each with a solder joint 15.
  • a wiper fusible conductor 1 may be used in which one or more insulating fibers are wound around the core 3 in parallel with the fuse wire 2, the adjacent turns of the Melt wire 2 thus hold at a predetermined distance from each other.
  • the combination of such a development with the seal according to the invention improves the breaking capacity and the reproducibility of the properties of the winding conductor.

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  • Fuses (AREA)

Claims (13)

  1. Elément fusible à enroulement pour un composant de fusible (5), présentant :
    un noyau isolant ou à haute résistance (3) sur lequel est enroulé au moins un fil conducteur fusible (2), ce noyau (3) présentant des fentes, des pores ou d'autres espaces libres,
    une matière plastique thermostable (4) étant appliquée sur le noyau (3) de façon telle qu'au moins les parties de surface du noyau dégagées entre les spires de fil conducteur fusible soient couvertes par la matière plastique et que les intervalles formés entre le fil conducteur fusible enroulé (2) et la surface du noyau (3) ainsi qu'au moins les espaces libres extérieurs du noyau (3) soient pratiquement remplis de la matière plastique.
  2. Elément fusible à enroulement selon la revendication 1, caractérisé par le fait que le noyau (3) est constitué de plusieurs fibres de verre et/ou de céramique et les intervalles entre les fibres de verre et/ou de céramique sont également pratiquement remplis par la matière plastique (4).
  3. Elément fusible à enroulement selon l'une des revendications 1 et 2, caractérisé par le fait que la matière plastique (4) enveloppe l'élément fusible à enroulement (1) de façon telle que les surfaces extérieures du fil conducteur fusible (2) aussi soient couvertes par la matière plastique.
  4. Elément fusible à enroulement selon l'une des revendications 1 à 3, caractérisé par le fait qu'autour du noyau sont enroulées parallèlement au fil conducteur fusible une ou plusieurs fibres isolantes qui maintiennent les spires voisines du fil conducteur fusible à une distance fixée les unes des autres.
  5. Elément fusible à enroulement selon l'une des revendications 1 à 4, caractérisé par le fait que la matière plastique est une silicone.
  6. Elément fusible à enroulement selon la revendication 5, caractérisé par le fait qu'à la silicone sont mélangées une ou plusieurs matières d'extinction.
  7. Elément fusible à enroulement selon la revendication 6, caractérisé par le fait qu'à la silicone est mélangée de la poudre de mélamine.
  8. Procédé de fabrication d'un élément fusible à enroulement sur lequel un fil conducteur fusible est enroulé autour d'un noyau isolant ou à haute résistance, dans lequel :
    a) on imprègne le noyau d'une matière plastique liquide non durcie, en recouvrant aussi la surface du noyau d'une couche de matière plastique,
    b) avant le durcissement de la matière plastique, on enroule le fil conducteur fusible autour du noyau imprégné, et
    c) on laisse durcir la matière plastique, de sorte qu'on forme une matière plastique thermostable.
  9. Procédé selon la revendication 8, caractérisé par le fait qu'on imprègne le noyau d'une quantité de matière plastique liquide qui, lors d'une compression du noyau s'accompagnant de l'enroulement du fil conducteur fusible, conduit à l'expulsion de la matière plastique excédentaire.
  10. Procédé selon la revendication 9, caractérisé par le fait qu'après l'enroulement du fil conducteur fusible, on enlève la matière plastique excédentaire par raclage.
  11. Procédé de fabrication d'un élément fusible à enroulement sur lequel un fil conducteur fusible est enroulé autour d'un noyau isolant ou à haute résistance, le noyau présentant des fentes, des pores ou d'autres espaces libres, dans lequel :
    a) on enroule le fil conducteur fusible sur le noyau,
    b) ensuite, on revêt l'élément fusible à enroulement d'une matière plastique liquide non encore durcie de façon telle que la matière plastique puisse pénétrer dans les intervalles entre le fil conducteur fusible et le noyau ainsi que dans les pores, fentes ou autres espaces libres du noyau, et
    c) on laisse durcir la matière plastique, de sorte qu'on forme une matière plastique thermostable.
  12. Procédé selon la revendication 11, caractérisé par le fait qu'après le revêtement, on enlève la matière plastique excédentaire de l'élément fusible à enroulement par raclage.
  13. Procédé selon l'une des revendications 8 à 12, caractérisé par le fait qu'on utilise comme matière plastique liquide une résine silicone durcissable.
EP05011930A 2005-06-02 2005-06-02 Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique Expired - Fee Related EP1729317B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502005001781T DE502005001781D1 (de) 2005-06-02 2005-06-02 Wickelschmelzleiter für ein Schmelzsicherungsbauelement mit Kunststoffversiegelung
EP05011930A EP1729317B1 (fr) 2005-06-02 2005-06-02 Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique
CNA2006100930129A CN1873875A (zh) 2005-06-02 2006-06-02 用于用塑料加封的熔断保险丝构件的卷绕保险丝
JP2006154828A JP4733570B2 (ja) 2005-06-02 2006-06-02 プラスチックシールを有するヒューズエレメントのための可溶性螺旋状導体
US11/421,978 US20070132539A1 (en) 2005-06-02 2006-06-02 Fusible spiral conductor for a fuse component with a plastic seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05011930A EP1729317B1 (fr) 2005-06-02 2005-06-02 Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique

Publications (2)

Publication Number Publication Date
EP1729317A1 EP1729317A1 (fr) 2006-12-06
EP1729317B1 true EP1729317B1 (fr) 2007-10-24

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EP05011930A Expired - Fee Related EP1729317B1 (fr) 2005-06-02 2005-06-02 Conducteur fusible pour coupe-circuit enroulée en hélice avec fermeture en plastique

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Country Link
US (1) US20070132539A1 (fr)
EP (1) EP1729317B1 (fr)
JP (1) JP4733570B2 (fr)
CN (1) CN1873875A (fr)
DE (1) DE502005001781D1 (fr)

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EP1729317A1 (fr) 2006-12-06
US20070132539A1 (en) 2007-06-14
JP4733570B2 (ja) 2011-07-27
DE502005001781D1 (de) 2007-12-06
JP2006339161A (ja) 2006-12-14
CN1873875A (zh) 2006-12-06

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