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Circuit-Shield Motor Overcurrent Relay Instructions

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This document provides installation, operation, and testing instructions for ABB Circuit-Shield™ motor overcurrent relays, including Types 49/50/51, 49/50, and 49 in Catalog Series 214 and 414 cases. It covers precautions, settings for overload (49), stall (51), and fault (50) units, as well as wiring, reset modes, and handling of electrostatic sensitive components.

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