After the resistance cabinet is equipped with a neutral point -to -ground resistance cabinet, when a non -metallic ground ground occurs, the current resistance of the ground is significantly reduced when the current and the neutral point current flows in the operation.At the same time, the improvement of phase voltage rising is also significantly reduced, and the zero -sequential voltage value is about half of the ground metallic ground.It can be seen that the use of neutral points through the resistance to the ground, and there can be a current -limiting and voltage effect when there is a ground failure.
Working principle of resistance cabinet
Principle: A type of current -limiting electrical protection equipment connected between the transformer neutral point and the earth. When the grid is running normally, it does not work. When the grid line fails, the voltage of the transformer neutral point will generate offset.Points with ground resistance devices, which can force the neutral point of the distribution grid to ground and limit its fault current, so that the relay protection equipment has enough time to detect it, realize the cards and spare switching, and avoid the power distribution grid and electrical equipment.been destroyed.
Resist cabinet manufacturer
Beijing Times Jiaying Technology Co., Ltd. Beijing Times Jiaying Technology Co., Ltd. is a large manufacturer of independent research and development and production of high -power resistance, aluminum shell resistance, load resistance, precision resistance and other accessories.Widely serve the electrical and electronic industry and military industry, aerospace, railway, automobiles, automobiles, power supply, photovoltaic, wind power, industrial transmission and home appliances and other industries.The product is green and environmentally friendly, with excellent selection of materials, and can be customized (even in a densely ventilated room, you can work with peace of mind, because it is non -toxic and tasteless), and can provide customized services such as product selection according to customer needs
The role of resistance cabinet
1. Resistance cabinets are widely used in the international and high -resistance grounds of generators to limit the ground current to prevent the harm of various overvoltage.2. The neutral point can limit the fault current to the appropriate value through the resistor ground, and improve the sensitivity of relay protection to the brake. At the same time, the fault point may only cause local slight burns.At 2.6 times the neutral point voltage, limit the reunification of the arc, and prevent the main equipment from being damaged by the overvoltage of the arc light gap.3. At the same time, the iron magnetic resonance can be effectively preventing the voltage, thereby ensuring the safe operation of the generator.It has a good effect on reducing the overvoltage of the power grid and improving the security and reliability of the power grid.

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