CIRCUIT-SHIELD Solid-State Overcurrent Relay Instructions

This document provides comprehensive instructions for installing, operating, testing, and maintaining ASEA Brown Boveri's CIRCUIT-SHIELD solid-state overcurrent relays, including single-phase, two-phase, and three-phase drawout semi-flush mounted units. It covers critical precautions, connection diagrams, current pickup tap settings, time dial and instantaneous adjustments, and in-service testing procedures to ensure proper relay functionality and safety.