SACE PR1 Overcurrent Release Installation, Service and Maintenance Instructions

This document provides installation, service, and maintenance instructions for the ABB SACE PR1 series microprocessor-based solid-state overcurrent releases. It details the modular PR1 protection unit (PR1/P) and its optional ammeter, control, and dialogue units, including the adjustment of protection functions for overload (L), short-circuit (S), instantaneous (I), and earth fault (G), along with selector settings, tripping curves, and thermal memory configuration.