The neutral grounding method via resistance in power network systems has a history of over 100 years in developed countries like Europe and the United States, and its application in China's power grid is also increasingly widespread. When the compensation capacity of the arc suppression coil grounding system is insufficient to meet the rapid development needs of the system, the neutral grounding method via resistance is often adopted to better limit the system's overvoltage levels and quickly select and isolate faulty lines. Additionally, to limit the fault current flowing through the engine outlet and control overvoltage levels in power generation systems, the neutral grounding method via resistance is frequently used as well.

Neutral grounding through resistors effectively limits intermittent arc-over ground overvoltage, reduces system operational overvoltage, eliminates system resonance overvoltage, facilitates single-phase grounding fault protection, and can quickly isolate faulty lines. This reduces the insulation level of system equipment, extends the service life of the system equipment, and enhances system reliability. The product uses stainless steel electrically conductive metal materials, featuring high electrical conductivity, high temperature coefficient, corrosion resistance, high-temperature resistance, strong antioxidant properties, high tensile strength, and stable resistance, ensuring reliable operation. In a medium-voltage distribution system, if the transformer is connected in a delta configuration, a Z-type grounding transformer must be installed to artificially bring out the neutral point for the installation of a neutral grounding resistor.