Design and Protection of 10,000-Kva Series Capacitor for 66-Kv Transmission Line

To correct for voltage regulation and light flicker on the 66-kv line supplying arc furnace and steel plant load, a series capacitor of 500 amperes continuous rating and 13.5 ohms was installed. This series capacitor was built with three groups of standard 2,400-volt 15-kva capacitor units connected in series per phase with each group being protected by its own by-pass gap and automatic switch. This is the largest and the highest voltage series capacitor so far installed.