LW28 series change over switch is used in the circuit of AC 50Hz, rated voltage up to 380V, DC voltage up to 240V, rated current up to 160A, to not frequently switch on/off circuit, transfer and control circuits, also it can directly control small capacity motor to be used for master control or electric meters. The switch is used widely in circuit control, test equipment, switch for motor, master control, welding machine and etc.