... .IEC 1036 international standard 3.RS485 output interface Good quality electric digital kwh meter Product brief introduction The DDS3666 ... , the device typifying new periphery component, simple structure, high reliability,low power consumption, long life etc, is suitable for the single ... frequency, when load current Larger than 0.4%Ib. (Power factor:1).Running with no-load. The meter use logic circuit ...