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交流接触器由电磁系统、触头系统、灭弧装置及机构附件组成。电磁系统包括电磁线圈和静、动铁芯。静铁芯在下、动铁芯在上，电磁线圈在静铁芯上。请登陆:输配电设备网浏览更多信息当电磁线圈通电时，静、动铁芯即被吸合。触头系统包括一组三相主触头及两个常开，两个常闭辅助触头。主触头和动铁芯连在一起。主触头为双断口，用来接通主电路。辅助触头则接在控制回路中，以实现各种控制方式。灭弧装置一般为陶瓷制成的栅式灭弧罩，用来及时熄灭因断开大电流而产生的电弧。
