Analysis Of The Causes Of Copper Busbar Bending In Copper Terminal Blocks

In actual electrical assembly and equipment operation, the bending phenomenon of the copper busbar of copper terminal block is not accidental, but the result of a combination of physical and technological factors.

During the production process, although the copper busbar material has good ductility, the protection and mold settings during processing have a decisive influence on the forming state. Inappropriate bending radii or processing forces can lead to stress concentration in the material, causing unexpected deformation or microcracks in the copper busbar. Properly designing the bending radius and forming parameters of the copper busbar is an important reference for controlling shape deviations.

During the assembly stage, the positioning status of the fasteners and supporting structures directly guides the stress state of copper distribution block. Applying excessive bolt torque or having the support point not aligned with the copper terminal strip line of force may cause the copper busbar to bear residual mechanical stress after it is fixed. During the thermal expansion and contraction cycles of the equipment, this initial stress further accumulates, eventually manifesting as visible bending of the copper busbar.