Selection of fuse (RT, NT type). The rated current of the total overcurrent protection fuse at the low-voltage side of the distribution transformer shall be greater than the rated current at the low-voltage side of the distribution transformer, generally 1.5 times of the rated current, and the rated current of the melt shall be determined according to the allowable overload multiple and fuse characteristics of the transformer.

The rated current of the fuse for overcurrent protection of the outgoing circuit shall not be greater than the rated current of the total overcurrent protection fuse. The rated current of the fuse shall be selected according to the normal maximum load current of the circuit and shall avoid the normal peak current.

Generally, the rated current of shunt capacitor bank fuse can be 1.5-2.5 times of the rated current of capacitor. In order to analyze the reactive power of the rural low-voltage power grid, a DTS (x) series active and reactive two in one multi-functional energy meter (installed on the side of the meter board) is installed in the box to replace the three single-phase energy meters (DD862 series meters) originally installed, so as to facilitate the on-line operation monitoring of the load.