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SS4 Static Transfer Switch One-Line Diagram

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This document is a one-line diagram and user interface detail for an ABB Static Transfer Switch (STS) rated at 3000/4000A, 480V, 3-phase, showing power stage components, bypass breakers, and control wiring. It includes OCPD recommendations, alarm relay configurations, and field wiring specifications for the User Interface Board (UIB) with Ethernet, MODBUS, and remote EPO connections.

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