High-voltage switches, bushings, lightning arresters: Experiences of the Southern California Edison Company on its 60,000, 150,000 and 220,000-volt system

This paper describes the experiences of the Southern California Edison Company with oil switches on its 60-kv., 150-kv. and 220-kv. systems, with air break switches on its 220-kv. system, with bushings on its 60-kv., 150-kv. and 220-kv. systems, and with lightning arresters on all voltages from 11 kv. up. In some instances the experiences do not lead to unquestionable conclusions. This is particularly true in the case of lightning arresters. More nearly complete information in regard to actual occurrences will aid in drawing definite conclusions.