Both versions can be combined with overload protection switches for undervoltage and overload protection The switch has the following functions, derived from power outage and undervoltage protection. Bipolar cut-off, unipolar cut-off function Widely used in machine tools, large power tools, garden machinery and This is a switch. After the device is accidentally powered off, it will not turn on. You need to press the green start button to turn it on., Manufacturer: Contencinty