The AL-JXB neutral point grounding method is to connect a resistor of a certain resistance value between the neutral point and the earth. The resistor forms a parallel circuit with the system\'s ground capacitance. Since the resistor is an energy-consuming element, it is also a capacitor charge release element and a resonant voltage-blocking element. It has certain advantages in preventing resonant overvoltage and intermittent arc grounding overvoltage. In the neutral point grounding method, the value of the resistor is generally selected to be smaller. When the system is single-phase grounded, the current flowing through the grounding point is controlled to be around 500A, and some are controlled to be around 100A. The current flowing through the grounding point is used to start the zero-sequence protection action and cut off the fault line.
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