The invention relates to two electronic watt-hour meter rates and way to achieve double rates. Electronic watt-hour meter includes energy metering unit, microprocessor, count modules and import signal processing modules linked with the microprocessor and one of. Import signal processing modules include diplomacy, DC conversion and isolation unit, which is used to do DC conversion and isolation to external input signal; Microprocessor is used for clarifications of electric energy measurement unit value based on the input signal and output signal and controls Counter-measures rates. This invention adopts the combination of outside control and table counting, uses microprocessors for sampling, directly controls counter and double rates. This invention deals with the specific occasion user demand by the use of different rates in effective way. Such as, the car parking, charging- room, and it is high reliability. |