Operation of Complex Arrangements of Power Supplies in the Zero Gradient Synchrotron Experimental Area

The types of power supply in parallel-series combinations range from 20kW to 825kW. They are silicon controlled rectifier (SCR) or reactor controlled. Each supply has its own isolated power transformer and interfacing is accomplished by interconnecting cable rather than interface transformers. Control is through single reference, either potentiometer or computer generated D to A convertor. Pulse and reaction time of SCR units, methods of filtering, millisecond reaction interlocking and the economics and efficiencies of operation will be discussed.