Today we have made an important step in our company. The expedition of our stationary slip ring 35 kV was carried out. The company SLT components spol. s r.o. has produced this device for a mining machine designed for coal mining in surface mines located in northern Bohemia. The development and production of this power supply system took for several months and at the end of this period was created a real atypical machine. Everybody, who was involved in development and production is proud on it. This ring collector is designed and produced in a stainless steel housing and is equipped with four ventilation and heating units, one of which can effectively heat the entire housing. The cabinet is equipped with a special multiple coating, with an automatic lighting system and with a special control spot. A hygroscopic filter is part of the equipment and takes care for passive moisture separation.