BD 系列产品电力工程智能变送器是一种将电力网里的电流量、工作电压、工作频率、输出功率、功率因素等电物理量，经防护变送器成线形 的直流电数字信号或模拟信号设备。商品合乎 GB/T、IEC-688 规范。 Series BD electric transmitters is a device which can isolate and transmit electric parameters, such as current, voltage, frequency, power, power factor, into linear DC analog signal or digital signal. It meet the re of National standard GB/T, IEC-688.