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SPER 1B1 C4 Trip Circuit Supervision Relay Product Guide

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This document is a product guide for the ABB SPER 1B1 C4 trip circuit supervision relay, which monitors circuit-breaker trip circuits and other essential control circuits in power installations. It details features such as continuous monitoring, detection of bad contacts, contact welding, and auxiliary voltage failures, along with application information for use in distribution automation systems.

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