Three-phase meter test equipment is a new-generation, high precision system, applicable to test of both single-phase meter and three-phase meter. Using advanced technology, its design complies with national standards. The equipment is of duralumin configuration, with digital control signal source, PWM power amplifier, high precision reference meter, error processing system and auto-calibration software. With PMW modulation power amplifier, this kind of test equipment offers the features of large power, high reliability and high cost performance, as an ideal product for meter manufacturers. New digital synthetical sine signal source provides various functions and high stability. With modularized design, the equipment is good for customization and functional expansion.