It is found that the 220VAC power core wire and signal core wire are located within one cable, sometimes the signal interference will be generated. Based on the case of signal interference that was found during commissioning in Sanmen Nuclear Plant Project. The essay qualitatively analyze electromagnetic induction, distributed capacitance, and core wire distributionthat imposed on the interference from 220VAC power core wire to signal core wire. And suggest solutions to reduce the interference.%系统或设备中有可能存在220VAC强电芯线与弱电芯线合用一根电缆的情况,有可能产生信号干扰.本文以基于三门核电一期工程发现的信号干扰问题,从芯线间存在的电磁感应、电容分布以及芯线分布位置等方面,定性分析强电芯线干扰弱电芯线的原因,并给出减小干扰的方案.
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