Features: 1) Designed for three-phase energy meter2) Adoption of high-performance CPU, less adjustment, stable performances,excellent make up, and high reliability3) Standard instrument construction is suitable for both lab and fieldapplications4) In case of field use, packed with a soft bag, it is small and light5) Large capacity memory for power failure is provided6) It can automatically store large amount of field test data7) Complete computer interface functions enable synchronous transmission ofreal test data, featuring intelligent instrument and meeting internationaltrend8) Automatically selection of input power supply brings about convenience infield applications and prevents from damage caused by incorrect connectionof power supply9) High accuracy clamp-type current meter can be provided10) The instrument can work by directly using PT voltage