标准摘要
[中文适用范围]： 该标准描述了液浸式单相和三相步进电压调节器的电气和机械要求，不超过 3000 kVA（对于三相设备）或 1000 kVA（对于单相设备）。本标准不适用于有载调压电力变压器。目的 本标准旨在作为建立性能@有限电气和机械互换性@以及所描述设备的一般要求的基础。它还有助于正确选择此类设备。 [外文原描述]： IEC 60076-21:2011/IEEE Std C57.15:2009 - Description of design types, tables of 50 Hz and 60 Hz ratings, supplementary ratings, construction, and available accessories are provided. Methods for performing routine and design tests applicable to liquid-immersed single and three-phase step-voltage regulators are described. Winding resistance measurements, polarity tests, insulation power factor and resistance tests, ratio tests, no load loss and excitation current measurements, impedance and load loss measurements, dielectric tests, temperature tests, routine and design impulse tests, short-circuit tests, control tests, calculated data, and certified test data are covered.
英文名称Power transformers - Part 21: Standard requirements, terminology, and test code for step-voltage regulators