Step Down Transformer for Outdoor Power Systems

Prefabrication pit basis

(1) The foundation of the pit can be formed with steel plates above 6mm or more to ensure that the surface water and other debris cannot enter the pit: prefabricated reinforced concrete structure can also be adopted, and advanced waterproof technology can be used leakage.

(2) There is a set of pools at the bottom of the pit, and a submersible pump controlled by an automatic non -water system is installed.

(3) Install a high and low voltage cable installation stand in the pit, which is convenient for the cable installation and fixation.

(4) Waterproof lighting is installed in the pit for easy maintenance.

(5) The foundation top cover has open maintenance holes.

Waterproof treatment of buried substation

The underground combination transformer with a bury -type box is allowed to be immersed in the water, and the waterproof and drainage of the pits are fully designed.

For areas with low groundwater levels (lower than the bottom of the pit), the prefabricated pit structure is adopted. The ventilation holes on the top of the pit have effective ventilation and rainproof capacity. The underground is infiltrated, and a prefabricated concrete pit structure is adopted for areas with high groundwater levels (higher than the bottom of the pit), preventing the inflow of surface water into the ground pits and underground water infiltration.

Heat dissipation of buried substation

(1) The underground transformer uses low -loss iron -hearted, rolled iron -hearted or amorphous alloy iron heart products. The air load loss and load loss are largely reduced, so the heat is low.

(2) High heat -resistant levels of transformers have a high degree of temperature rise, and also improved the transformer's overload ability.

(3) The underground transformer uses a cyclotrophic transformer oil (or high -combustion point oil) to ensure that the product has good heat dissipation capabilities.

(4) Between the power distribution box and the basic ground pits, a air inlet and outlet are set up.When the temperature rise of the local underground combination transformer reaches the set value, it will be given a strong exhaust air cooling to ensure the normal progress of the underground transformer.