当安装中性点接地电阻柜后，当发生非金属性接地时，受接地点电阻的影响，流过接地点和中性点的电流比金属性接地时有显著降低，同时，健全相电压上升也显著降低，零序电压值约为单相金属性接地的一半。由此可见，采用中性点经电阻接地，有接地故障时可起到限流降压作用。有试验表明，由于中性点电阻能吸附大量的谐振能量，在有电阻器的接地方式中，从根本上抑制了系统谐振过电压。
When the neutral grounding resistance cabinet is installed, when the non-metallic grounding occurs, the current flowing through the grounding point and neutral point is significantly lower than that of the metallic grounding due to the influence of the grounding resistance. At the same time, the voltage rise of the sound phase is also significantly reduced, and the zero sequence voltage value is about half of the single-phase metallic grounding. It can be seen that if the neutral point is grounded through resistance, it can play a role of limiting current and reducing voltage in case of ground fault. Some tests show that, because the neutral point resistance can absorb a lot of resonance energy, the resonance overvoltage of the system is fundamentally suppressed in the grounding mode with resistor