General Descripition SDM series three phases DIN RAIL kWh meter use International technology of surface decoration with high-precision electric elements. It has the functions of high accuracy, stability, small size, light weight, low power consumption and bilateral recording with indication of missing phase, sign of output pulse so that it is easy for extended functions of modernized management. It conforms to the related GB/T17215-1998 and IEC62053. Measuring the active energy of three phase consumption correctly. In case of reverse energy connection; With high performance characteristics of measurement (with flat typical load curves) , long working time without readjustment Power supply by three phases, the accuracy of the measurement is not affected by power cut in _disibledevent=999999. 9kWh Low power consumption, less than 1. 2W for meter. Wide voltage rage applicable, 0. 8Un1. 2Un 35mm standard DIN rail installation , Impulse output, complying with standard DIN43864. The EMC feature complies with IEC62053-21 May select infrared communication interface and RS485 communication interface.