Analysis Of The Causes Of Overheating Or Insulation Breakdown In Bimetallic Terminals In Industrial Automation Systems

If there is a junction of different metals (such as copper and aluminum) at the bimetallic lugs price list connection, plating failure or electrochemical corrosion will occur, leading to increased contact resistance and localized overheating. This is similar to the phenomenon of increased contact resistance and overheating at the connection point in aluminum-copper mixed terminals.

If the rated current and cable lug bimetal specifications are not strictly followed during installation or maintenance, bimetallic lugs will be under overload or high contact resistance for extended periods. This condition will further induce temperature rise and decreased insulation heat resistance in bi metal cable lug, ultimately leading to breakdown.