aluminum strip transformer windings are suitable for low voltage (hundreds of volts), high current (hundred amps to thousands of amps) transformer, and are commonly used as secondary windings for distribution transformers. The foil type transformer adopts high conductivity copper foil strip or aluminum strip as the conductive material, and the thickness of the copper foil or aluminum strip foil is about 0.1 to 2.5 mm. The aluminum strip for transformer winding price is lower than copper foil price, so, the aluminum strips occupy more market in transformer enterprises.