What is the reason for the operation of the main transformer low-voltage backup protection?

[DeArcher]

The reason for the operation of the main transformer low-voltage backup protection is that the transformer operates statically in the power system. However, since transformers are usually installed outdoors and due to other factors, faults may occur in the transformer. When a fault occurs, the corresponding transformer protection will operate. Here is the relevant information: 1. The reasons for the operation of the transformer backup protection are: short circuit on the high-voltage side of the transformer, short circuit on the low-voltage busbar of the transformer, failure of differential protection due to faults within the differential protection range, malfunction of backup protection, faults in the low-voltage lines, refusal of line protection to operate, leading to overload tripping of the transformer. 2. The role of the transformer: For the main transformer, due to its large capacity and relatively high construction cost in the power station, any fault in the transformer directly affects normal power supply. The use of transformer protection prevents the expansion of transformer faults and minimizes losses.