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SS4 Static Transfer Switch One-Line Diagram

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This document provides the one-line diagram and technical specifications for the ABB SS4 100-250A Static Transfer Switch (STS) power stage, including breaker designations, OCPD recommendations for 208V, 380-415V, and 480V systems, and user interface board (UIB) wiring details. It also includes revision history, notes on installation compliance, and electrical connection layouts for alarm relays, communication ports, and control power.

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