Product Introduction: The DSSF25/DTSF25 three-phase electronic multi rate energy meter is designed and manufactured using advanced microelectronics technology, large-scale integrated circuits, digital sampling processing technology, and SMT technology, according to the actual electricity consumption of industrial users, with modern advanced level of instruments. It can not only directly and accurately measure the positive and negative active and reactive energy, as well as various sub items of energy, but also process them according to the corresponding rate requirements in different time zones and periods. It can also display current, voltage and other parameters of each phase.