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Summarization:DT(X)S949/DS(X)S949 three-phase active and reactive electronic meter uses large-scaled integrated circuit, SMT techniques, world-famous branded long-life components, and 5+2 digit LCD. It shows information of consumption and power net parameters directly. It can measure the 50Hz~60Hz three-phase AC active and reactive consumption accurately as well as the power net parameters such as currency, voltage, power factor. It meets all the technical requirement of the standard GB/T17215-2002, GB/T17882-1999 and some other relative national standards. It can be mainly used as two three-phase meters to measure the consumption and power net parameters and it has extended the RS485 communication which can help power company to read distant meter. It has good reliability, wide load, low consumption, high accuracy, and good anti-disturbance performance.Main function and characteristic:1) LCD display:a) LCD display can show the data clearly and circularly by turn such as active consump