New connection design of high power bolted busbar connections

The paper reported discusses how introducing a slotted hole shape or groups of small holes around the bolt holes in high power bolted busbar connections increases significantly the true contact area and therefore reduces contact resistance. The new designs, formally called S, SH and G type are compared with the classical one of bolted busbar connections by the help of several computer models. It has been estimated that the new cases lead to a considerable raise in contact pressure P and contact penetration mu in the contact interface between the busbars.