高压开关设备和控制设备.第110部分:电感负载开关

[中文适用范围]： 本国际标准适用于设计用于室内或室外安装、在电压高于 1000 V 的系统上以 50 Hz 和 60 Hz 频率运行、用于带或不带附加短路电流开断功能的感应电流开关的交流断路器。 。该标准适用于符合 IEC 62271-100 的用于开关高压电机电流和并联电抗器电流的断路器，也适用于用于开关高压电机电流的高压接触器 [1]。本标准不考虑开关空载变压器，即开断变压器励磁电流。其原因如下： a) 由于变压器铁芯的非线性，无法在测试实验室中使用线性组件正确模拟变压器磁化电流的切换。使用可用变压器（例如测试变压器）进行的测试仅对被测变压器有效，不能代表其他变压器； b) 正如 IEC 62271-100 和 IEC 60694 应用指南（以下简称指南 [2]）中所详述，该负载的特性通常不如任何其他感应电流开关负载严重。应该注意的是，这种负载可能会在变压器绕组内产生严重的过电压，具体取决于断路器的重新点火行为和变压器绕组谐振频率。短路故障、异相电流接通和分断以及容性电流开合不适用于用于开关并联电抗器或电动机的断路器。因此，这些职责不包含在本标准中。 IEC 62271-100 的第 1.1 条在其他方面也适用。注：1 方括号内的数字指参考书目。 [外文原描述]： Applicable to a.c. circuit-breakers designed for indoor or outdoor installation, for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 1000 V and applied for inductive current switching with or without additional short-circuit current breaking duties. The standard is applicable to circuit-breakers in accordance with IEC 62271-100 that are used to switch high-voltage motor currents and shunt reactor currents and also to high-voltage contactors used to switch high-voltage motor currents. Switching unloaded transformers, i.e. breaking transformer magnetizing current, is not considered in this standard. The reasons for this are as follows: a) due to the non-linearity of the transformer core, it is not possible to correctly model the switching of transformer magnetizing current using linear components in a test laboratory. Tests conducted using an available transformer, such as a test transformer, will only be valid for the transformer tested and cannot be representative for other transformers; b) as detailed in the guide for application of IEC 62271-100 and IEC 60694, the characteristics of this duty are usually less severe than any other inductive current switching duty. It should be noted that such a duty may produce severe overvoltages within the transformer winding(s) depending on the circuit-breaker re ignition behaviour and transformer winding resonance frequencies. Short-line faults, out-of-phase current making and breaking and capacitive current switching are not applicable to circuit-breakers applied to switch shunt reactors or motors. These duties are therefore not included in this standard.