1.The American transformer, no tap-changer: The American transformer has no tap-changer; It uses two coils as primary and secondary winding respectively to realize the conversion of AC power supply. The European transformer has two coils as the primary and secondary winding to achieve the conversion of AC power supply.

2.The American box is an oil-immersed transformer, and the transformer is exposed to the outside, and the low pressure chamber is bolted together, and the American box has no high voltage chamber, and the high voltage inlet line uses "plug-in fuse + load switch", and the transformer is sealed in the transformer mailbox; The European box is an independent high-voltage chamber, low-voltage chamber, transformer room each function is separated.

3.Us transformer, US transformer, pre-installed substation, US transformer, US transformer set GHM-003 12KV,50Hz US transformer, used in 10KV ring network electricity, dual power supply or terminal power supply system, as power transformation, distribution metering, compensation, control and protection devices