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If the copper-aluminum joint is as firm as the same kind of joint, there are the following measures: 
In business or residential transmission lines are electrically commonly encountered among copper, aluminum row, copper and aluminum wire, terminal connection problems. In these connections, as long as the two ends of the connection are copper and aluminum two different materials, you will encounter copper and aluminum joint problems. Based on historical experience, such as copper and aluminum connections do not take certain measures, it is easy connection point heat, corrosion, disconnect the power supply line break, short circuit, power outages and other electrical fault occurs. How to solve the problem of transmission line copper and aluminum wiring high voltage motor lead wire
1, when an aluminum wire connected to a copper terminal (e.g., an aluminum cable is connected to an air switch), requires the use of terminals (cable lugs), this transition copper and aluminum terminals, copper and aluminum are copper and aluminum casting binding the transition junction, the contact surface is a molecule gap There will be no disadvantages of copper and aluminum joints.
2, copper and aluminum connected copper: copper and aluminum transition wiring. How to solve the problem of transmission line copper and aluminum wiring high voltage motor lead wire
3, the copper access aluminum row: aluminum brass head using copper and aluminum transition line terminal, but this small amount of terminals, not readily available market, the practice of the method I is taken at the first row at the joint of aluminum with a plurality of crimping a bolt copper, copper terminals connected to the copper side, as long as a sufficiently large contact surface, but also solve the problem of copper and aluminum connectors. How to solve the problem of transmission line copper and aluminum wiring high voltage motor lead wire
4, aluminum row copper row: to more than twice the length of the ordinary same metal stack, and more bolted compaction.
5. Aluminum is connected to the air switch: Take a copper row on the air switch first, and then do the fourth.
6. Applying a small amount of white petrolatum at the aluminum row joints can reduce aluminum row corrosion.