带电作业.便携式接地或接地并短路设备

[中文适用范围]： 本国际标准适用于带或不带匹配连接点的便携式设备，用于电气隔离或断电的交流和直流装置、配电和传输网络的临时接地或接地和短路，无论它们是架空的、地下的还是地下的。低或高电压。注：附录 A 提供了铁路系统应用指南。本标准涵盖包含接地或短路或接地和短路装置以及绝缘部件的设备。图1a和图1b给出了一个例子。它还包括： - 接地或短路或打算用绝缘装置安装的接地和短路装置。图1c给出了接地装置的示例； - 单独的组件，例如导电延长件（见图 1b）或带端部配件的夹子或电缆。本标准涵盖的设备、装置和部件的性能基于短路期间作用的电动和电热效应。器件和设备的耐受能力用其电流、时间和峰值系数的额定值来表示。没有给出额定电压，但设备的几何尺寸也与安装电压有关。接地和短路装置的连接图示例如图 2 和图 3 所示。表 1 中给出了相关的常用电缆长度。本标准未涵盖的有： - 绝缘装置，例如绝缘棒、伸缩棒、绝缘棒用于安装接地和短路装置的手柄、绝缘手套、带有绝缘吊杆的高空作业装置、绝缘绳； ——绝缘元件，但绝缘元件的基本安全要求除外；注：附录 B 中给出了接地棒的基本安全建议。 - 仅用于排出感应电流的装置； ——使用便携式设备接地或接地与短路的相关工作程序。注：符合本标准的设备应根据安全工作程序以及当地或国家法规（例如带电工作或带电工作程序）使用。 [外文原描述]： IEC 61230:2008 is applicable to portable equipment, with or without matching connection points, for temporary earthing or earthing and short-circuiting of electrically isolated or de-energized a.c. and d.c. installations, distribution and transmission networks, whether they are overhead or underground or of low or high voltage. This standard covers equipment comprising an earthing or a short-circuiting or an earthing and short-circuiting device and insulating component. The performance of equipment, devices and components covered by this standard is based on electro-dynamic and electro-thermal effects acting during short-circuit. The withstand capability of the devices and equipment is expressed by their rated values of current, time and peak factor. No rated voltage is given, but the geometrical dimensions of the equipment are also linked to the voltage of the installation. This second edition cancels and replaces the first edition published in 1993. It constitutes a technical revision. The major changes are: - extension of the scope to cover the use of equipment on d.c. installations; - extension of the use of aluminium to all conductive parts of the device; - possibility of using this standard for separate components of the equipment; - general revision of requirements and tests; - revision of existing annexes; - introduction of a new informative Annex D giving guidelines for determination of the equivalent r.m.s. value of a short-circuit current and of a new normative Annex F on classification of defects.