GB/T 14810-2014 in English

《GB/T 14810-2014额定电压72.5 kV及以上交流负荷开关》由TC65（全国高压开关设备标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准适用于额定电压72.5kV 及以上、额定频率50Hz、具有关合和开断电流额定值、用于户内和户外安装的三极交流负荷开关。
本标准也适用于负荷开关的操动机构及其辅助设备。
注1:本标准涵盖了气体绝缘金属封闭开关设备(GIS)中的负荷开关。
注2:具有隔离功能的负荷开关即隔离负荷开关还应满足GB1985的要求。
注3:本标准没有涵盖接地开关。作为负荷开关整体一部分的接地开关包含在GB1985中。
本标准的主要目标是确定输电系统中使用的负荷开关的要求。设计此用途的通用负荷开关以满足下述运行要求:
―――连续承载额定电流;
―――在规定的时间内承载短路电流;
―――开合有功负载电流;
―――开合空载变压器;
―――开合空载电缆、架空线路或母线的充电电流;
―――开合闭环回路;
―――关合短路电流。
本标准的更高的目标是确定输电系统中使用的专用和特殊用途负荷开关的要求。
专用负荷开关应满足上述的一种或多种运行工况。
特殊用途负荷开关除满足通用负荷开关的一种或多种运行工况外,还应满足下述一种或多种工况:
―――开合单个电容器组;
―――开合背对背电容器组;
―――开合并联电抗器,包括从变压器一次侧开合二次侧或第三绕组侧并联电抗器;
―――要求提高的操作循环次数的工况;
―――在中性点非有效接地系统中的接地故障条件下的开合。

Scope

This standard applies to three-pole AC load switches with rated voltage of 72.5 kV and above, rated frequency of 50 Hz, with making and breaking current ratings, for indoor and outdoor installation. This standard also applies to the operating mechanism of the load switch and its auxiliary equipment. The main objective of this standard is to determine the requirements for load switches used in transmission systems. The general-purpose load switch designed for this purpose meets the following operating requirements:--Continuously carry the rated current;--Carry the short-circuit current within the specified time;--Switch active load current; Open and close the charging current of no-load cables, overhead lines or busbars;--open and close closed-loop circuits;--close short-circuit current. A higher objective of this standard is to determine the requirements for dedicated and special purpose load switches used in transmission systems. The dedicated load switch should meet one or more of the above operating conditions. In addition to meeting one or more operating conditions of general load switches, special-purpose load switches should also meet one or more of the following operating conditions: --opening and closing a single capacitor bank;--opening and closing a back-to-back capacitor bank;- - opening and closing parallel reactors, including switching secondary side or tertiary winding side shunt reactors from the primary side of the transformer; - operating conditions requiring increased operating cycles; - in non-effectively grounded neutral point systems Switching under ground fault conditions.