This series of portable AC charging pile tester mainly has charging voltage measurement, guide circuit control (controlled by charging switch) and other functions, single three-phase common. By measuring the charging voltage, you can determine whether the charging pile is output as required. By switching the charging switch, you can determine whether the charging pile is enabling and shuting down the output as required. Product specific panel schematic shown in Figure 1, mainly has the European standard AC charging car socket interface, plug gun control switch, charging controlswitch,AC volt meter, load expansion port composition.