Fig 8-1. Kilowatt-demand curve of an electric furnace heat showing the relatively high rate of power consumption during meltdown as compared to the reducing period. Total charge: 136,400 lb. Power consumption: 27,000 kw per hr. Time to melt: 2 hr, 20 min. Time charge to tap: 4 hr, 50 min. P.F. during melt: 87 sec. Volts: 282.