The copper busbars vibrate severely when the current is increased.

DC busbar? Typical ion-exchange membrane cells use two copper bars connected in parallel as the DC busbars. When the current is increased, the changing current strengthens the magnetic field generated by the direct current; as a result, the two busbars repel each other. Due to the flexibility of the copper bars, they have a tendency to return to their original position. The combined effect of these two forces causes the busbars to oscillate, which is what the original poster referred to as vibration. This vibration is different from the natural vibration caused by eddy currents in the busbar; it occurs only when the current changes direction. The greater the current, the greater the force generated, and the more severe the vibration becomes. To avoid vibrations, it is necessary to secure and clamp the copper bars; in particular, an insulating plate must be used to separate the two copper bars, which should then be clamped with clamps on both sides. Busbars and support brackets should be installed at regular intervals. Just follow the original design; the key is the quality of construction. It is also important to ensure that the dimensions of the two copper bars are consistent; otherwise, if their rates of thermal expansion differ, it will exert stress on the clamps and connection bolts, and it will also create conditions that facilitate vibration of the copper bars. It is recommended that the poster ask the electrical workshop to pay close attention to the key areas subject to vibration, and to implement additional fixing measures as necessary. It’s easy to solve the problem. When clamping, pay attention to the direction of stress; avoid letting the copper bars contract and cause the insulators to tip over when the device is stopped.