Transformer neutral point grounding resistance cabinet, generator neutral point grounding resistance cabinet and low voltage grounding resistance cabinet. This series of products have a wide range of applications. Usually, they can be installed in the auxiliary power system of power plants, power supply systems of substations, and distribution systems of industrial and mining enterprises. The grounding resistance cabinet is mostly suitable for neutral point grounding with small resistance or medium resistance. It has certain targeted performance. When the equipment fails in the use process, it needs to trip immediately and cut off the fault line. Therefore, the product has certain practicability.
变压器中性点接地电阻柜作用:我国电力系统常用的中性点接地方式有:中性点直接接地、中性点不接地、中性点经消弧线圈接地(谐振接地)、中性点经电阻接地这四种方式。电力系统接地运行方式涉及电网的安全运行、供电可靠性、用户用电安全等诸多重要问题。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,抑制电网过电压的辐值,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
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运行Function of transformer neutral point grounding resistance cabinet: the commonly used neutral point grounding methods in China's power system are: the neutral point is directly grounded, the neutral point is not grounded, the neutral point is grounded through the arc suppression coil (resonant grounding), and the neutral point is grounded through resistance. Grounding operation mode of power system involves many important problems such as safe operation of power grid, reliability of power supply, and safety of users. The neutral point grounded by resistance is a resistor connected in series between the neutral point and the ground. Proper selection of the resistance value of the connected resistor can not only release the energy of the second half wave of the single-phase grounding arc, so as to reduce the possibility of arc re ignition and suppress the radiation value of the grid overvoltage, but also improve the sensitivity of the relay protection device to act on the tripping, so as to effectively protect the normal operation of the system