A9F07640 is a phase monitor module from Schneider Electric. It can be used to monitor current unbalance in three phase systems. It has four output contacts which can be used for alarm or control functions, as well as three relays for unbalanced current control. The device is designed for use in an extensive range of industrial applications, including lighting, pumps, motors, compressors, and other equipment. The A9F07640 also features a built-in earthing system for improved safety, as well as integrated protection against overvoltage and surge protection.