A million volt testing set — II

THE design and construction of the three 500-kw., 578,000-volt transformers and of the 500-kw. insulating transformer were given in Part I of this paper¹, which included also illustrations of single-phase arcs between sharp points, spaced 9, 11 and 14 ft. apart and corresponding to the crest voltages of sine potential waves having effective values of approximately 1,000,000, 1,200,000 and 1,500,000 volts.