互感器(instrument transformer)是按比例变换电压或电流的设备。互感器的功能是将高电压或大电流按比例变换成标准低电压(100V)或标准小电流(5A或10A,均指额定值),以便实现测量仪表、保护设备及自动控制设备的标准化、小型化。互感器还可用来隔开高电压系统,以保证人身和设备的安全。按比例变换电压或电流的设备。
合并器除了可以接收并处理来自多个采集器的数字信号外,还可以接收并处理电磁式互感器提供的电压、电流模拟量。
The combiner can not only receive and handle the digital signal from many collectors but also the analog variable of current and voltage provided by the electromagnetic transformer.
故可得出结论:在中性点绝缘系统中,因电磁式电压互感器饱和引起的过电压现象属于工频位移过电压。
Therefore, the over-voltage caused by the electromagnetic voltage transformer saturation in the system with insulated neutral belongs to shifting over-voltage.
在中性点不接地电网中,频繁发生由电磁式电压互感器引起的铁磁谐振现象。
In the neutral ungrounded power system, ferroresonance over-voltage due to electromagnetic transformer takes place frequently.
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