• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In the case of the melting conductor it is intended that the fuse be capable of being stressed continuously up to the limit of its rated load capacity without any instabilities occurring in the melting material in this limiting-load region. In the case of relatively high currents in the lower overload region, the fuse is, however, nevertheless intended to be capable of burning through in a short time. In order to achieve this object, the fuse has a plurality of sections (14) of narrowed cross-section. In this case, at least one of these sections (15) is placed on a part along the melting conductor where the operating temperature is in the relatively low temperature range of the operating temperature distribution (17) along the melting conductor, and the cross-section of this section (15) is smaller, but its length is in contrast greater, than in the case of the other sections (14). <IMAGE>
    公开号:SU797617A3
    申请号:SU762361807
    申请日:1976-05-19
    公开日:1981-01-15
    发明作者:Чизи Тибор；Мелиш Янош；Карпат Арпад；Семерей Золтан
    申请人:Вилламош Берендезеш Еш Кесюлекмювек (Инопредприятие)；
    IPC主号:
    专利说明:

    one
    The invention relates to electrical engineering, in particular to the design of fused conductors of electrical fuses.
    Electrical fuse conductors are known having sections of reduced section TI.
    The disadvantage of this device is considerable inertia at elevated currents.
    The closest to the present invention is a fusible conductor for low voltage electrical fuses, made in the form of a metal strip with portions of the narrowed section G2.
    The disadvantage of this device. It is impossible to change the response time at insignificant current surges, as well as increase the service life at nominal load.
    The purpose of the invention is to reduce the response time at minor current surges and increase the service life under the load rating.
    The goal is achieved due to the fact that the famous fusible conductor
    contains one narrowed section, the cross section of which is smaller, and the length is greater than the other sections with a narrowed section, with the specified section located closer to the end of the fused conductor, moreover, at the ends of the section with the smallest section and the greatest length, a metal may be applied or a metal alloy having a heat capacity and a melting point lower than the heat capacity and melting point of the fusible conductor, and the specified narrowed portion in the fusible conductor can
    twice as long as
    section in two) aza smaller than the length and width of the remaining narrowed sections.
    FIG. G presents the fusible conductor; 2, the distribution of heat in the low-melting conductor (the ratio of the heating of the sections of the fusible conductor).
    The fusible conductor 1 has sections of narrowed section, so-called bridges 2. These narrowed sections have a small length. At the end of the low-melting conductor there is a narrowed section 3, the names are two times smaller
    .section and twice the length,
    than the rest narrowed in 1astek. It should be noted that in the area with a greater length with the passage of current, a greater amount of heat occurs than in the area with a larger cross section and shorter length.
    The presence of several short sections 2 of the narrowed cross section improves the cooling condition of the fusible element in such a way that itpvt is the largest current value that does not cause melting of the fusible element, the temperature distribution in the constricted areas differs little from the temperature distribution in the non-constricted areas. The presence of a section of a narrow section of a large length provides for the release of a large amount of heat on it and provides a large temperature difference in the sections of different sections 2 and 3.
    In the cold state, the resistance of section 3 is four times the resistance of other areas, and in the state of thermal equilibrium, occurring at the highest but not yet melting melting current conductor, the resistance still increases due to the absolute temperature. With this curve 4, small temperature increases in areas 2 are shown, and thermal equilibrium of section 3 can occur only with a large temperature difference.
    . .In the proposed melting edement
    section 3 is made from the end of the fusible conductor 1, at a distance of 20-25% of the total length, i.e. at the end of the fusible conductor 1 so that the outside air temperature does not cause
    . would dissipate heat. Thus, the heating curve 5 of this area is in the region of low temperatures. In this case, the thermal equilibrium of region 3 arises in the immediate vicinity of the unstable state, i.e. a rather small increase in temperature occurs, and a regime occurs in which the heat removal from the area becomes less than the formation of heat. Then a temperature peak occurs (curve 6) and the fusible element 3 melts.
    The proposed device allows to bring together two critical values, namely the greatest current, but not yet causing the melting of the fusible element, and the lowest overload current, which causes the melting of the fusible element, in a short time. High short circuit currents cause thermal overturning. balance in all areas of the constricted cross section at the same time and in all areas there is a multiple short arc arc. The advantage of the occurrence of a multiple electric arc is that simultaneously in several places channels of molten fusible material appear that not only limit the passage of current, but also increase the limiting value of the voltage. Increases .c also intensity-hash-arc.
    The heating characteristic of section 3 and the thermal regime can be varied over a wide range by depositing on the constricted section 3. at the points at which this section comes into contact with the greatest surface of an ox5, a binding, a metal, such as silver or a metal alloy, having a heat capacity and a melting point than the fusible conductor itself. You can also use 0 glass bead. The presence of this metal or alloy retards heating of region 3 and, thus, any melting characteristic can be achieved.
    权利要求:
    Claims (2)
    [1]
    1. A hot-melt conductor for low-voltage electrical fuses, made in the form of a metal strip with sections of a narrowed section, is about. u with the fact that, in order to reduce the response time at minor current surges and increase the service life at nominal load, it contains one narrowed section, the cross section of which is smaller and longer than the other sections with narrowed section, and closest to the end of the fuse conductor.
    [2]
    2. A conductor according to claim 1, characterized in that at the ends of the section with the smallest cross section and the greatest length there is applied a metal or metal alloy having a heat capacity and melting point lower than the heat capacity and melting point of the fusible conductor. ,
    3 Conductor on PP ;. 1 and 2, characterized in that said narrowed portion is twice as long, and the cross section is two times smaller than the length and width in the remaining sections with narrowed cross section.
    Sources of information, pr 5: s taken into account in the examination
    1. The patent of Germany No. 1281539, cl. 21 C 70, 1968.
    2. The patent of France 1 .2062960, cl. H 01 and 85/00, 1971.
    а о а а а d О
    About
    1 P
    类似技术:
    公开号 | 公开日 | 专利标题
    US4357588A|1982-11-02|High voltage fuse for interrupting a wide range of currents and especially suited for low current interruption
    US4374371A|1983-02-15|Cadmium electric fuse
    CA1083645A|1980-08-12|High voltage current limiting fuse
    US4319213A|1982-03-09|Electric fuse for compensating heating in the center of the fusible element
    SU797617A3|1981-01-15|Fusible conductor
    EP0333483A2|1989-09-20|Electrical fuses
    US3374328A|1968-03-19|Cartridge-type fuse with explosion pots
    US2856488A|1958-10-14|Current-limiting fuses for small current intensities
    CA1128100A|1982-07-20|Electric fuses employing composite metal fuseelements
    US2800554A|1957-07-23|Electric fuses
    US2337504A|1943-12-21|Current limiting fuse
    KR910003658B1|1991-06-08|Fuse for high-voltage circuit
    US4731600A|1988-03-15|Fuse
    US3835431A|1974-09-10|Electrical fuse
    US3255383A|1966-06-07|Fuse containing means responsive to large fault currents and means responsive to small continuous overloads
    US3287526A|1966-11-22|Electric fuse element having cooling tabs
    US3138682A|1964-06-23|High voltage arc extinguishing electric fuses
    US2270404A|1942-01-20|Fuse
    US3805208A|1974-04-16|Protector for electric circuits
    US3240905A|1966-03-15|Low voltage fuse having a casing of cellulosic material and an arcquenching filler of quartz sand
    US4146861A|1979-03-27|Quick-acting fuse arrangement
    US3123694A|1964-03-03|High current-carrying-capicity cartridge
    US3069520A|1962-12-18|Electric fuse construction
    SU574175A3|1977-09-25|Fuse
    CA1067546A|1979-12-04|Fusible element for electrical apparatus
    同族专利:
    公开号 | 公开日
    YU122876A|1982-05-31|
    IT1062362B|1984-10-10|
    SE7605629L|1976-11-20|
    HU174872B|1980-03-28|
    BG30478A3|1981-06-15|
    FR2312103B1|1981-09-04|
    DE2622085A1|1976-11-25|
    DE2622085C2|1984-01-19|
    NL7605352A|1976-11-23|
    FR2312103A1|1976-12-17|
    GB1538475A|1979-01-17|
    ATA360376A|1978-03-15|
    DD124267A5|1977-02-09|
    CH608913A5|1979-01-31|
    AT346411B|1978-11-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH277463A|1948-06-14|1951-08-31|Ag Weber|Electrical fuse with metallic conductor.|
    DE962999C|1951-05-17|1957-05-02|Chase Shawmut Co|High-performance fuse of the current-limiting type|
    CH412073A|1962-06-28|1966-04-30|Siemens Ag|Low voltage high performance fuse|
    DE1288671B|1964-08-06|1969-02-06|Siemens Ag|Process for the production of band-shaped fusible conductors for sluggish fusible links|
    GB1326535A|1969-09-23|1973-08-15|English Electric Co Ltd|Fuse element|US4357588A|1981-06-03|1982-11-02|General Electric Company|High voltage fuse for interrupting a wide range of currents and especially suited for low current interruption|
    HU185325B|1981-12-01|1985-01-28|Vbkm Eoresaramu Gyartmany Es R|Melting strip for fusing element, the fusing element with the said strip and method for making thereof|
    DE10311576A1|2003-03-10|2004-09-23|Institut für Mikroelektronik- und Mechatronik-Systeme gGmbH|Overcurrent protection for electric strip conductors for battery cells, with strip collector electrodes and restriction located in connecting direction between connecting electrodes|
    DE102008036672B3|2008-08-06|2010-03-04|Leoni Bordnetz-Systeme Gmbh|Electrical fuse for protecting electrical circuit in automobile against overload, has connecting piece with conductive cross-section larger than that of strip in zone, where piece continuously passes into circular formation of strip|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU75VI1044A|HU174872B|1975-05-19|1975-05-19|Fusing element of electrical fuse|
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