DTSF22 Three Phase Four(Three) Wire Multi-tariff Electronic Meter are designed to satisfy industrial demand, adopting large-scale integration(LSI), digital sampling technology and surface mounting technology (SMT). It features stable functions, high precision and easy operation. The meter is capable of measuring active/reactive energy and demand in all directions, RS485 port communication, manual and infrared waking during power outage, load record and much more. It can check the battery to ensure the safety and stability of clock. The meter is popularly used by ordinary three phase clients, power plant, transformer substation, communities and main measurement point. 16units in a carton.