操作线圈 meaning in English

operating coil
operation coil

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:论述了与交流接触器操作线圈适配的交直流输入(操作)电压通用，恒直流输出，吸合与保持电压无触点自动转换节电器的工作原理。
The operation principleresult of saving power ， mate rial and reliability of ac and dc usual auto - converting saving power instrument are expounded , which the operation - coil of ac contactor given ac and dc voltage is usual , output is even dc , on and off and keeping voltage non - contactor auto - convert
论述了与交流接触器操作线圈适配的交直流输入(操作)电压通用、恒直流输出、吸合与保持电压无触点自动转换节电器的工作原理；接触器配用节电器后的节能节材效果及节电器的可靠性。