The American-style box transformer structure is divided into two parts: front and rear.
The front is the high and low voltage operation interval. The high-voltage compartment includes high-voltage terminal, load switch, no-load tap changer, plug-in fuse, pressure relief valve, oil level gauge and oil drain valve. The low-voltage compartment includes low-voltage terminals.
The rear part is the oil filling box and radiator, and the transformer winding and iron core, high-voltage load switch and protective fuse are all in the oil filling box.