Generator neutral point grounding resistance cabinet

The neutral point grounding resistance cabinet of Hongyan generator is installed between the neutral point of the generator and the ground. During the operation of the generator, single-phase grounding is the most common fault, and the fault point will further expand when arcing is grounded. Stator winding insulation damage or even iron core burns and sintering. Internationally, for single-phase ground faults in generator systems, high-resistance grounding at the neutral point of generators is widely used to limit ground current and prevent various overvoltage hazards. The neutral point can be grounded through a resistor to limit the fault current to an appropriate value, improve the sensitivity of the relay protection and act on tripping; at the same time, only local slight burns may occur at the fault point, and the transient overvoltage is limited to the normal line voltage. 2.6 times of the neutral point voltage, which limits the re-ignition of the arc; prevents the arc gap overvoltage from damaging the main equipment; at the same time, it can effectively prevent the ferromagnetic resonance overvoltage, thereby ensuring the safe operation of the generator.