变频器限流电阻旁路开关的选用探讨

摘要

介绍了目前固态继电器、交流接触器、单极直流接触器等变频器的限流电阻保护用旁路开关的具体用法和选用习惯，讨论解决了在使用单极直流接触器时绝缘电压选择、接触器并联使用及额定工作电压选择等相关问题。%The usages and the selection trend of the bypass switches for the current-limit resistors of the solid-state relays, AC contactors and single-polar DC contactors of the inverters are presented. The three problems and the relevant solutions on the insulation voltage, the parallel connection and the rated working voltage for the single-polar DC contactors using are also given.