Why Use Bimetallic Terminals In The Main Circuit Incoming Line Of The Distribution Cabinet?

The use of bimetallic lugs at the main circuit inlet of the distribution cabinet stems from considerations regarding the connection method between conductors of different materials. bi metal cable lug is a connection component composed of two different conductive metals (such as aluminum and copper), suitable for transition joints connecting aluminum core cables to copper busbars or contacts.

The main circuit inlet of the distribution cabinet often uses large-section aluminum conductors to reduce cost and weight, but the busbars and circuit breaker connection points inside the cabinet are usually made of copper. Direct contact between aluminum and copper easily leads to electrochemical corrosion, increasing the contact surface impedance, causing localized heating, and even affecting the long-term operation of the circuit. The composite structure technology of bi metal lugs connectors can form a reliable mechanical and electrical connection between the two metals, thereby improving the overall circuit connection quality and long-term stability.