In the power system, a lot of conductive materials need to be consumed. The terminals of many equipment are copper materials, while overhead conductors are mostly aluminum materials. Therefore, the conductors made of aluminum materials are widely used. If the two materials are directly connected, the contact resistance will be very large. When the equipment operates for a long time, overload or short circuit, the connection will rapidly rise, and heat will be transferred to the power equipment, SEO such as transformer, light