Abstract : this paper introduces the working pinciples of the electro - economizer , in which either alternating or direct current voltage can be input with the adaption to the operating coils of contactor , steady direct current is output , and voltage auto - converting is absorbed and kept withno contacting point 文摘:論述了與交流接觸器操作線圈適配的交直流輸入(操作)電壓通用,恒直流輸出,吸合與保持電壓無觸點(diǎn)自動轉(zhuǎn)換節(jié)電器的工作原理。