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SS4 2000A Static Transfer Switch One-Line Diagram

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This document provides a one-line diagram of the ABB SS4 2000A Static Transfer Switch (STS), detailing the power stage, interlock logic, and user interface board (UIB) connections. It includes breaker designations (input, bypass, load), source inputs, alarm relays, communication ports (MODBUS, Ethernet), and OCPD recommendations for upstream protection.

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