Gapless surge arrester
    5.
    发明授权
    Gapless surge arrester 失效
    无间隙避雷器

    公开(公告)号:US4223366A

    公开(公告)日:1980-09-16

    申请号:US961011

    申请日:1978-11-15

    CPC分类号: H01C7/12

    摘要: A gapless surge arrester is disclosed herein and includes a porcelain outer casing and a stack of zinc oxide discs located within the casing for passing surge currents therethrough. Silicon dioxide, preferably sand, is provided between this stack in the casing for transferring heat from the discs to the porcelain outer casing as a result of the surge current and for absorbing fault energy where necessary by changing states.

    摘要翻译: 本文公开了一种无间隙电涌放电器,其包括瓷外壳和位于壳体内的用于使浪涌电流通过其中的氧化锌盘堆。 二氧化硅(优选沙子)设置在壳体中的该堆叠体之间,用于将热量从盘传递到瓷外壳,由于浪涌电流并且在必要时通过改变状态来吸收故障能量。

    Method for the nondestructive testing of voltage limiting blocks
    6.
    发明授权
    Method for the nondestructive testing of voltage limiting blocks 失效
    电压限制块无损检测方法

    公开(公告)号:US4112362A

    公开(公告)日:1978-09-05

    申请号:US755619

    申请日:1976-12-30

    CPC分类号: G01R31/00 G01R15/00

    摘要: A method for the nondestructive testing of voltage limiting blocks includes the steps of providing several discrete electrical contacts across the block, sequentially applying to each of the contacts a voltage to determine the corresponding current and utilizing the current and voltage values to determine constants related to the microstructure of that particular location. The constants can then be utilized to derive a contour map which will be indicative of a hot spot in such block as determined by a maxima of the contour map.

    摘要翻译: 用于电压限制块的非破坏性测试的方法包括以下步骤:在块上提供几个离散的电触点,顺序地向每个触点施加电压以确定相应的电流并利用电流和电压值来确定与 该特定位置的微观结构。 然后可以使用常数来导出轮廓图,其将指示由等高线图的最大值确定的这种块中的热点。

    Method of fabricating non-linear voltage limiting device
    7.
    发明授权
    Method of fabricating non-linear voltage limiting device 失效
    制造非线性电压限制装置的方法

    公开(公告)号:US4474718A

    公开(公告)日:1984-10-02

    申请号:US287371

    申请日:1981-07-27

    IPC分类号: H01C7/102 H01C7/112 H01B1/08

    CPC分类号: H01C7/112 H01C7/102

    摘要: A non-linear voltage limiting device displaying a particular stability characteristic and designed to eliminate flashover failure across its circumferential edge is disclosed herein along with a specific method of fabrication. The voltage limiting device is characterized by a rising resistive current with time at predetermined temperature and voltage levels and includes a disc-shaped wafer composed primarily of zinc oxide. In accordance with the method disclosed herein, after this wafer is formed and sintered in accordance with prescribed temperature and time requirements, its circumferential edge is provided with an anti-flashover coating which requires curing. Thereafter, the coated wafer is annealed in a way which cures the coating and, at the same time, reduces and preferably minimizes the resistive current rise characteristic referred to above.

    摘要翻译: 本文公开了一种非线性电压限制装置,其显示特定的稳定特性并被设计成消除其周缘上的闪络故障,同时还涉及具体的制造方法。 电压限制装置的特征在于在预定温度和电压电平下随时间增加的电阻电流,并且包括主要由氧化锌组成的盘状晶片。 根据本文公开的方法,在根据规定的温度和时间要求形成并烧结该晶片之后,其圆周边缘设置有需要固化的抗闪络涂层。 此后,涂覆的晶片以固化涂层的方式进行退火,并同时降低并优选地使上述电阻电流上升特性最小化。

    High current zinc oxide fuse
    8.
    发明授权
    High current zinc oxide fuse 失效
    大电流氧化锌保险丝

    公开(公告)号:US4528537A

    公开(公告)日:1985-07-09

    申请号:US569068

    申请日:1984-01-09

    IPC分类号: H01H85/00 H01H85/38

    摘要: There is provided by this invention a current limiting fuse having a zinc oxide core electrically connected in parallel with an array of wire fuse elements capable of shaping and controlling the arc voltage developed during current interruptions.

    摘要翻译: 本发明提供了一种限流熔断器,其具有与能够整形和控制电流中断期间产生的电弧电压的线熔丝元件阵列并联电连接的氧化锌芯。