ELR72P/ELR72V24P Electronic Residual Current Relay Technical Manual

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.