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ELR72P/ELR72V24P Electronic Residual Current Relay Technical Manual
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This document provides technical specifications, wiring diagrams, and configuration instructions for the ABB ELR72P and ELR72V24P electronic residual current relays, including sensitivity and delay time settings, fail-safe modes, and alarm functions. It covers auxiliary power supply connections, toroidal transformer wiring, remote reset/autoreset features, and minidip switch programming for compliance with IEC/EN 60947-2 Annex M.
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