Product features • the shell is made of high strength glass fiber unsaturated polyester resin, which has good corrosion resistance, impact resistance, thermal stability and other properties. • the socket is mainly composed of shell, flameproof switch, plug socket, cable connection terminal, linkage mechanism and cable introduction device; • with interlock mechanism, only when the switch in the socket is broken can the plug be pulled out, and only when the plug is inserted can the switch be closed; • the product sets the timing function, sets different indicating colors for different operating voltages, and prevents the plug and socket of different specifications from being pulled out by mistake.