一款双回路防窃电单相电能表的设计

A Double-Loop Anti-Theft Single-Phase Watt-Hour Meter Design

研究设计的双回路防窃电单相电能表除了能实现正常的计量功能外,对失压窃电的掉零线窃电方式能有效检测。在零线电流超过1 A时,能启动电能表正常计量。主要完成了单相电能表的基本电路设计,包括电压采样、电流采样、强磁检测、近红外通信以及RS485通信等,并对部分电路波形进行了测量验证。

The double-loop anti-theft single-phase watt-hour meter designed in this paper can not only realize the normal metering function,but also effectively detect the zero-line stealing mode of power loss.When the neutral current exceeds 1 A,the normal measurement of the electric energy meter can be started.The basic circuit design of single-phase watt-hour meter is mainly completed,including voltage sampling,current sampling,strong magnetic detection,near infrared communication and RS485 communication,and some circuit waveforms are measured and verified.