This article introduced take the AD7757 electrical energy measurement chip as the core, designs one kind of survey city electricity activepower the intelligent electric meter method.
介绍了以ad7757电能计量芯片为核心，设计一种测量市电有效功率的智能电度表的方法。
2
Accurate gage of the locomotive power, active and passive, are realized via the intelligent kilowatt-hour meter, making the scientificmanagement of locomotive power possible at the same time.
该系统实现了机车用电（有功、无功）的准确计量，同时为机车用电的科学管理打下了基础。
3
Measure function: can measure current, voltage, activepower, reactive power, frequency, zero sequence current, electric energy, 2 pulse inputs implement watt-hour meter auto read;