Product Description The ABB REJ603 is a self-powered numerical feeder protection relay designed for selective short-circuit and earth-fault protection. It is the ideal choice for Ring Main Units (RMU) and secondary distribution switchgear where auxiliary power is unavailable.
Core Features:
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Self-Powered: Operates using power from the current transformers (CTs).
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Integrated Protection: Non-directional overcurrent (50/51) and earth-fault (50N/51N) protection.
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Easy Maintenance: Front USB port for fault data and event log access.
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Robust Design: Built for harsh environments with an operating temp of $-25\text{°C}$ to $+70\text{°C}$.
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Tags: REJ603, ABB, Relion, Protection Relay, Self-Powered,