AY-ZZD series main transformer neutral grounding resistor cabinet

The AY-ZZD series main transformer neutral grounding resistor cabinet is mainly used for the neutral point of system transformers with high grounding capacitance current for 6-35kV cable power supply.

It is our responsibility to provide high-quality products to reduce overvoltage in the power grid, improve the safety and reliability of the power grid. Our company develops and produces a series of stainless steel neutral point grounding resistor cabinets using special stainless steel alloy materials. When the current exceeds the specified value, there is a possibility of arc grounding overvoltage. The purpose of using a resistor grounding method for the neutral point is to inject resistive current into the fault point, with the resistive component current being 1.05-1.1 times the capacitive component current. It is possible to limit the fault current moderately, improve the sensitivity of relay protection, and limit the fault point to only local minor damage. The transient overvoltage can be limited to 2.6 times the normal relative neutral point voltage to prevent arc overvoltage from damaging the main equipment. At the same time, suppressing ferromagnetic resonance overvoltage has a significant effect.