Abstract :
E. A. Childerhose (Jackson and Moreland, Boston, Mass.): We have been investigating overvoltages at a plant using a large number of electric arc furnaces varying in size from 1,000 kva to 10,000 kva. The number and magnitude of surges closely parallels the arc-furnace transient curve shown in Figure 7 of the paper except that the maximum voltage does not exceed seven times normal.
