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ABB 2000/2000R Series Protection Relay User Logical I/O Application Note

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This application note explains the configuration and use of nine user-programmable logical inputs (ULI1-ULI9) and outputs (ULO1-ULO9) in ABB 2000 and 2000R series protection relays. It covers how these I/O sets can be connected or disconnected via Windows-based software (WinECP, GPUECP), and provides practical examples such as trip coil monitoring and close circuit monitoring for enhanced breaker failure detection.

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