Series Capacitor SF-6 Bypass Interrupter

Series capacitor banks on transmission lines ave two types of bypass switches; high-speed switches located on the insulated capacitor platforms for operation, and manually-operated line switches to isolate the bank for maintenance. Air break switches used for maintenance bypass on 345 kV series capacitors could not successfully transfer line current without heavy arcing. An SF-6 interrupter like that manufactured for transformer protection, was selected for a simple retrofit replacement.