Development of a System for Resistance Welding of Multiple Dissimilar Joints in a Motor Protection Switch

The contribution treats of the development of a system for resistance spot welding of a release, which is a part of a motor protective switch. There are five welds among dissimilar materials on the release. For economical reasons the welds need to be produced using the same source, but with different welding parameters. The contribution presents the release and its function, its weld specifications, the development of the welding system, the determination of the welding parameters for one of the key resistance spot welds and the achieved results.