A 330-Kv Air Switch [includes discussion]

A 330-kv 1,300-kv BIL air switch has been developed which has been thoroughly tested for radio influence, corona, 60-cycle flashover, impulse flashover, switch gap co-ordination at 1,425 kv basic impulse insulation level (BIL), current capacity, and mechanical ability. Data obtained in this development also proves out the design of a switch using stacks eight insulators high, 1,425 kv BIL. A 330-kv interrupter has been developed capable of interrupting currents, both leading and lagging at very small power factors, of at least 10 amperes.