The systems with SiC mosfet technology, for "conduction" welding (commonly called contact), have been developed for the production of steel pipes of high diameter and thickness. A pair of sliding contact transfers the necessary electrical power to the pipe to be welded.
With this system, Elestar has also developed and built systems for welding conical poles for street lighting. This application has made it possible to reduce the time required for the complete welding of a pole by about fifteen times, compared to traditional systems commonly used.