中性点经电阻接地就是在电网中性点与地之间串联接入某一电阻器。适当选择所接电阻器的阻值，不仅可以泄放单相接地电弧后半波的能量，从而减少电弧重燃的可能性，抵制电网过电压的负值，还可以提高继电保护装置的灵敏度以作用于跳闸，从而有效保护系统正常运行。
Grounding the neutral point through a resistor means connecting a resistor in series between the neutral point of the power grid and the ground. Properly selecting the resistance value of the connected resistor can not only release the energy of the second half wave of the single-phase grounding arc, thereby reducing the possibility of arc reignition and resisting negative values of the power grid overvoltage, but also improve the sensitivity of the relay protection device to act on tripping, effectively protecting the normal operation of the system.
电阻柜分类：可以分为低压接地电阻柜、变压器中性点接地电阻柜、发电机中性点接地电阻柜三类。
Classification of resistor cabinets: They can be divided into three categories: low-voltage grounding resistor cabinets, transformer neutral grounding resistor cabinets, and generator neutral grounding resistor cabinets.
电阻柜应用：电阻柜安装在中性点上，主要保护一次设备发电机、变压器。电压等级为6-35KV，另外也有低压电阻柜电压等级分为380V、660V等。
Application of Resistance Cabinet: The resistance cabinet is installed on the neutral point, mainly to protect primary equipment such as generators and transformers. The voltage level is 6-35KV, and there are also low-voltage resistor cabinets with voltage levels of 380V, 660V, etc.