LOADING SELECTOR Russian patent published in 2004 - IPC

FIELD: radio electronics. SUBSTANCE: proposed loading selector specifically designed for instance to change over control winding taps in transformer incorporating provision for stepped voltage regulation functions to set changeover vacuum cells and to control them under all operating conditions. Fixed stepping contacts mounted inside insulating cylinder are arranged over circumference in separate horizontal plane for each phase. This insulating cylinder accommodates closing shaft free to rotate therein. Closing shaft has contact holder for each phase mounted for displacement, and two change-over vacuum cells are installed on this shaft in vertical position . EFFECT: reduced space requirement and enhanced safety and reliability afforded by selector for change-over vacuum cells. 8 cl, 6 dwg