变流器过载能力初探

摘要

变流器过载能力指标的三要素是过载电流百分比、负载周期和过载时间,并且它们是缺一不可的;介绍了几种市场上常见而重要的国外变流器的过载能力指标;指出德国西门子公司6SE70/6SE71系列变流器选型样本DA65.10在过载能力指标方面存在的错误;阐述了Siemens 6SE70/6SE71系列和ABB ACS800系列变流器在过载能力指标定义方面存在的显著差异,并探究出两者过载能力指标定义实质含义的不同.%The three key elements of overload capability index of converter are percent of overload current,load cycle and overload time and each is indispensable. Introduced the overload capability indexes of several familiar and important foreign converters. Found and corrected the error of overload capability index in the Siemens 6SE70/6SE71 series converter stylebook(DA65.10). It is expounded that there are significant differences and different signification of overload capability index between Siemens 6SE70/6SE71 series and ABB ACS800 series converter.