Composite electrical insulator and method of forming same
    1.
    发明授权
    Composite electrical insulator and method of forming same 失效
    复合电绝缘子及其形成方法

    公开(公告)号:US4845318A

    公开(公告)日:1989-07-04

    申请号:US158065

    申请日:1988-02-12

    摘要: The invention provides an electrical insulator comprising a cylindrical core (2) of an insulating refractory material, such as porcelain, onto a portion of the curved surface of which a sleeve (8) of insulating polymeric material is fitted. Metal end-caps (4), for electrically connecting the insulator, are fitted to the ends of the porcelain core such that there is an exposed portion (10) of the curved surface of the core between the sleeve and each end-cap. Thus, any damaging electrical activity which takes place at the metal end-caps is directed primarily onto the surface of the porcelain core (2), and not onto the surface of the electrically vulnerable polymeric sleeve (8), which serves to protect mechanically the relatively brittle porcelain core. Optionally, the polymeric sleeve (8) may have a convoluted or a shedded outer surface (12) to increase the leakage path length of the insulator, or to prevent the formation of a continuous moisture path, or both.

    摘要翻译: 本发明提供了一种电绝缘体,其包括绝缘耐火材料(例如瓷器)的圆柱形芯(2),其在弯曲表面的一部分上安装有绝缘聚合物材料的套筒(8)。 用于电连接绝缘体的金属端盖(4)装配到瓷芯的端部,使得在套筒和每个端盖之间存在芯的弯曲表面的暴露部分(10)。 因此,在金属端盖处发生的任何有害的电活动主要指向瓷芯(2)的表面,而不是指向电气易损的聚合物套筒(8)的表面,其用于机械地保护 比较脆的瓷芯。 可选地,聚合物套筒(8)可以具有回旋或脱落的外表面(12),以增加绝缘体的泄漏路径长度,或防止形成连续的湿气路径,或两者。

    Composite electrical insulator
    2.
    发明授权
    Composite electrical insulator 失效
    复合电绝缘子

    公开(公告)号:US5389742A

    公开(公告)日:1995-02-14

    申请号:US866071

    申请日:1992-04-01

    摘要: An electrical insulator comprising a cylindrical core (2) of an insulating refractory material, such as porcelain, onto a portion of the curved surface of which a sleeve (8) of insulating polymeric material is fitted. Metal end-caps (4), for electrically connecting the insulator, are fitted to the ends of the porcelain core such that there is an exposed portion (10) of the curved surface of the core between the sleeve and each end-cap. Thus, any damaging electrical activity which takes place at the metal end-caps is directed primarily onto the surface of the porcelain core (2), and not onto the surface of the electrically vulnerable polymeric sleeve (8), which serves to protect mechanically the relatively brittle porcelain core. Optionally, the polymeric sleeve (8) may have a convoluted or a shedded outer surface (12) to increase the leakage path length of the insulator, or to prevent the formation of a continuous moisture path, or both.

    摘要翻译: 一种电绝缘体,其包括绝缘耐火材料(例如瓷器)的圆柱形芯(2),所述绝缘耐火材料的一部分弯曲表面安装有绝缘聚合材料的套筒(8)。 用于电连接绝缘体的金属端盖(4)装配到瓷芯的端部,使得在套筒和每个端盖之间存在芯的弯曲表面的暴露部分(10)。 因此,在金属端盖处发生的任何有害的电活动主要导向到瓷芯(2)的表面上,而不是导电到电气易损的聚合物套筒(8)的表面上,其用于机械地保护 比较脆的瓷芯。 可选地,聚合物套筒(8)可以具有回旋或脱落的外表面(12),以增加绝缘体的泄漏路径长度,或防止形成连续的湿气路径,或两者。

    Heat-recoverable connector
    5.
    发明授权
    Heat-recoverable connector 失效
    热回收连接器

    公开(公告)号:US4237609A

    公开(公告)日:1980-12-09

    申请号:US870183

    申请日:1978-01-17

    摘要: A heat-recoverable article comprises a memory metal member to which has been imparted both thermally-recoverable and resiliently-recoverable strain. The resilient strain is retained by means of a disburdenable keeper, preferably one made from fusible or chemically degradable material, which can be removed, for example, by heating or chemical treatment, to allow resilient recovery. The article is preferably so constructed that it can be heated to obtain both thermal and resilient recovery simultaneously. One preferred form of article is a radially expanded longitudinally split tube, the keeper being positioned in the split. Such an article can be used as a connector to secure an earth lead to the sheath of a mineral-insulated cable.

    摘要翻译: 可热回收制品包括已经赋予热可回收和可回弹应变的记忆金属构件。 弹性应变通过可膨胀的保持器保持,优选地由可熔或化学降解的材料制成,其可以例如通过加热或化学处理除去,以允许弹性回复。 该制品优选地被构造成可以被加热以同时获得热和弹性恢复。 制品的一种优选形式是径向扩张的纵向分裂管,保持器定位在分割中。 这样的物品可以用作连接器,以将地线固定到矿物绝缘电缆的护套上。

    Netting
    7.
    发明授权
    Netting 失效
    净额

    公开(公告)号:US3983280A

    公开(公告)日:1976-09-28

    申请号:US561690

    申请日:1975-03-25

    摘要: Netting formed of longitudinal and transverse threads of thermoplastic material bonded at the thread crossings by individual moulded buttons of thermoplastic material is improved by the use of threads that have been subjected to irradiation to cross-link their thermoplastic material. Higher moulding temperatures can be used in the formation of the bonding buttons, for example in the case of polyethylene filaments up to 260.degree. C or more, and increased bond strength between the crossing threads is achieved. The moulded buttons can also be formed of irradiated material.

    摘要翻译: 通过使用已经经过照射的螺纹将其热塑性材料交联而提高了通过热塑性材料的各个模制按钮在螺纹交叉处粘合的热塑性材料的纵向和横向线形网。 更高的成型温度可以用于形成接合按钮,例如在聚乙烯长丝高达260℃或更高的情况下,并且实现交叉螺纹之间增加的粘合强度。 模制的按钮也可以由照射的材料形成。

    High voltage apparatus
    9.
    发明授权
    High voltage apparatus 失效
    高压设备

    公开(公告)号:US4963819A

    公开(公告)日:1990-10-16

    申请号:US251050

    申请日:1988-09-26

    IPC分类号: G01R15/16

    CPC分类号: G01R15/16

    摘要: The invention provides a high voltage capacitor suitable for measuring the voltage of an overhead power line. The capacitor dielectric is mounted directly on to the power line conductor, which serves as one electrode of the capacitor. The other electrode of the capacitor is mounted on to the outer surface of the dielectric, and is protected at each side by a guard ring. Stress control is provided between the outer capacitor electrode and the guard rings and also at the outer edges of the guard rings. The capacitor may be enclosed in an earthed housing, which can contain one or more current transformers. The apparatus can be used for fault detection and location, and may be used in combination with a power cable or a switch.

    摘要翻译: 本发明提供了适用于测量架空电力线的电压的高压电容器。 电容器电介质直接安装在作为电容器的一个电极的电力线导体上。 电容器的另一个电极安装在电介质的外表面上,并在每一侧被保护环保护。 在外部电容器电极和保护环之间以及保护环的外边缘处提供应力控制。 电容器可以封闭在可以包含一个或多个电流互感器的接地壳体中。 该装置可用于故障检测和定位,并可与电力电缆或开关组合使用。

    Shielded electrical cable joints and terminations and sleeve and method
for forming same
    10.
    发明授权
    Shielded electrical cable joints and terminations and sleeve and method for forming same 失效
    屏蔽电缆接头和端子和套管及其形成方法

    公开(公告)号:US4383131A

    公开(公告)日:1983-05-10

    申请号:US74336

    申请日:1979-09-11

    摘要: An enclosure for a shielded cable termination or joint comprises a protective sleeve comprising a conductive outer layer (51), an insulating inner layer (52), advantageously of substantially uniform cross-section for at least a portion of its length, and optionally a stress grading innermost layer (53). At least the insulating layer (52) and/or the stress grading layer (53) overlaps the or each cable shield, in the case of the insulating layer by an amount at least equal to the thickness of the portion of the insulating layer overlapping the cable shield end. Preferably the sleeve is installed by heat recovery.

    摘要翻译: 用于屏蔽电缆终端或接头的外壳包括保护套筒,该保护套筒包括导电外层(51),绝缘内层(52),其对于其长度的至少一部分有利地具有基本上均匀的横截面,以及可选地应力 分级最内层(53)。 在绝缘层的情况下,至少绝缘层(52)和/或应力分级层(53)与电缆屏蔽层重叠,或者每个电缆屏蔽层重叠至少等于绝缘层重叠的部分的厚度 电缆屏蔽端。 优选地,套筒通过热回收来安装。