China Copper Clad Aluminum Busbar for Distribution Cabinet - Leading Suppliers and Factory Solutions

The main busbars of the distribution cabinets are mostly made of copper strips (with excellent conductivity and large current-carrying capacity), while the branch cables connected externally or led out internally are usually aluminum-core cables (with low cost and lightweight). Direct connection between copper and aluminum would result in poor contact, overheating and even faults due to electrochemical corrosion and differences in thermal expansion coefficients. The copper-aluminum transition strips can serve as intermediate connectors, with one end bolted to the copper busbar and the other end crimped onto the aluminum-core cable, achieving stable conductivity.

The connection terminals of core components such as circuit breakers, contactors, and transformers in the distribution cabinet are mostly made of copper. If the branch lines inside the cabinet use aluminum busbars or aluminum cables, a copper-aluminum transition busbar is required for connection, to prevent direct contact between the connection terminals of the components and the aluminum material, ensuring stable circuit resistance and reducing the risk of overheating.

Some large distribution cabinets, in order to balance cost and performance, adopt the design of "copper busbar for main circuit + aluminum busbar for branch circuit". The copper-aluminum transition busbar can achieve seamless connection between two sections of busbars of different materials, ensuring the continuity and safety of current transmission.