Micro-51 and Micro-51/FT Overcurrent Relay Instructions

This document provides installation, operation, and testing instructions for the self-powered, microprocessor-based single-phase time-overcurrent relay, Types Micro-51 and Micro-51/FT (catalog series 446S and 446F). It covers mounting, wiring, settings for pickup current, time curve selection, time dial adjustments, and safety precautions for these drawout relays used in Circuit-Shield and Flexitest cases.