电力电容器.低压电力因数校正装置组

[中文适用范围]： 本国际标准适用于用于功率因数校正的低压交流并联电容器组，可能配备有能够连接到电容器组的电源部分或从电容器组的电源部分断开的内置开关设备和控制设备。目的是纠正其功率因数。如果下文未另有说明，低压功率因数校正组在适用时符合 IEC 61439-1 和 IEC 61439-2 的要求。 [外文原描述]： IEC 61921:2017 is applicable to low-voltage AC shunt capacitor banks intended to be used for power factor correction purposes, possibly equipped with a built-in switchgear and controlgear apparatus capable of connecting to or disconnecting from the mains part(s) of the bank with the aim to correct its power factor. Low-voltage power factor correction banks if not otherwise indicated hereinafter and where applicable comply with the requirements of IEC 61439-1 and IEC 61439-2. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: numerous changes regarding verification methods to align with IEC 61439-1; modification of marking; add routine verification of rated output; new Annex D with guidance on methods for temperature rise verification; update of normative references; general editorial review. Keywords: low-voltage AC shunt capacitor banks