... disconnector. ABB outdoor column isolation is a single-phase isolation switch, it provides a visible fracture of maintenance personnel, can be ... used as asub-breakpoint. The structure of double-cdumn isolation switch, insulator bolt locked in a hot-dip zinc corrosion ... protection on the base, pull ring can be operated isolating switch. Technical parameterRated voltage(kV) 12 Rated Current (A)630/ ...