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Relay functions 1. Description REF601 offers pre-configured functionality which fa- REF601 is a dedicated feeder protection relay, cilitates easy and fast Hu?ng d?n co b?n cach truy c?p, cai d?t va tuy ch?nh thong s? cho Ro le REF601 c?a hang s?n xu?t ABB. Download the latest abb ref601 product manual. Check out and print abb ref601 product manual for free. Feeder Protection and Control Feeder Protection. View online (19 pages) or download PDF (506 KB) ABB REF601 Product Manual Description REF601 is a dedicated feeder protection relay, intended for the On detection of a fault the relay starts, trips the circuit breaker, , records fault data etc. in accordance with the application. REF601 has overcurrent The new feeder protection relay is designed to un- leash the advantages of current sensors for protection and control in medium voltage applications. The REF601 ABB. 2. 1MDB07212-YN. Feeder Protection and Control / Feeder Protection. REF601 / REJ601 The relay REF601 offers control of one circuit.permission from ABB, and the contents thereof must not be imparted to a REF601/REJ601/REM601 is a dedicated feeder protection relay, intended for the. 6.Control. The relay offers control of one circuit breaker. with dedicated push-buttons and guidance on. local HMI for opening and closing. It includes two. 16 4.1 REF601 / REJ601 Application Manual Three Phase Overcurrent Protection . The relay provides an optimized composition of protection, monitoring and