Circuit-Isolator II™ Disconnect

Construction

Circuit-Isolator II features aluminum blades (copper for models rated 2000 ampere continuous) with silver-inlaid, hot-tin-dipped (except over silver inlay), high-conductivity cast-copper tongue contacts. The jaw contacts are of multi-finger, spring-loaded, silver-inlaid, hard-drawn copper reverse-loop construction-to grip firmly against the tongue contact. The built-in blade-wiping action ensures a clean current-carrying surface and low-resistance current path.

Single-pole view of Circuit-Isolator II Disconnect.

The Circuit-Isolator II includes arcing horns. All arcing associated with charging and magnetizing currents is confined to the arcing horns to prevent pitting and erosion of the current-carrying contacts. It also includes all necessary station post insulators, vertical and horizontal operating pipe, pipe couplings and gearing necessary for installation.

A manual handle is also provided standard. Circuit-Isolator II alternately can be furnished with a manual geared operating handle or Type DS-1 Switch Operator.

Other Options Include:

• Pre-Assembly — All insulators are pre-assembled to the disconnect base. Saving installation time.
• Grounding Switch — 20 000 or 42 000 ampere grounding switch available for hinge-end of disconnect.
• Key Interlocks — For coordination with grounding switch.
• Auxiliary Contacts — Coupled to either the disconnect vertical operating pipe or the grounding switch; auxiliary contacts allow the switch position to be monitored remotely.