What type of material is used in long length bus bar joints to accommodate thermal expansion?

The use of flexible braided copper plates in long length bus bar joints is advantageous for accommodating thermal expansion due to their inherent ability to flex and absorb movement without compromising electrical connectivity. When electrical systems operate, they generate heat, leading to thermal expansion of materials. Traditional solid connections, such as solid copper plates or solid plates, may not allow for this thermal movement effectively, which can result in mechanical stress, potential damage, or failure over time.

Flexible braided copper plates consist of numerous strands of copper that are woven together. This design not only provides excellent conductivity but also allows for greater flexibility. As temperatures fluctuate, these plates can expand and contract without creating undue stress on the joint, maintaining a reliable and efficient electrical connection. The flexibility also helps in accommodating any misalignment that may occur during installation or due to structural shifts over time.

While options like annealed soft drawn copper or solid copper plates do provide good conductivity, they lack the necessary flexibility to handle the thermal dynamics of a system effectively. This makes flexible braided copper plates the preferred choice for ensuring the longevity and reliability of bus bar joints in applications that experience significant thermal variations.