How to select a resistor cabinet, can be connected between the transformer neutral point and the earth, a current flowing electrical protection device, does not work when the grid is operating, when the grid line is outline, the transformer neutral point voltage will generate offset,If the transformer neutral point is attached to the ground resistance device, it can force the distribution network neutral point to ground and limit its fault current.
Resistance Cabinet Principle: Connecting a current limiting electrical protection device between transformer neutral points and earth, does not work when the grid is operating, when the grid line is outlined, the transformer neutral point voltage will generate offset, if the transformerThe neutral point is connected to the ground resistance device, which can enforce the distribution network neutral point, and limit its fault current, so that the relay protection equipment has enough time to detect, realize the trip and standby switching, avoid distribution networks andElectrical equipment was destroyed.
The offset will be generated, and if the transformer neutral point is connected to the ground resistance device, it can force the distribution network neutral point to ground, and limit its fault current.