... of electrical circuit, change-over of electrical circuits HW26 Rotary switch (cam switch, changeover switch) HW26 series rotary switches are suitable for: on-off ... of electrical circuit,change over of electrical circuit motor switch,instrument switch,and main switch.HW26 series rotary switches comply with:IEC60947-5 ... and above sea level4)A clean environment is required... HW26 Cam switch