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: Includes multi-frequency admittance-based earth-fault protection, directional overcurrent, arc flash detection (AFD), and high-impedance (HIZ) fault detection.
To maximize the value of your technical manual:
The is the essential reference for engineers working with ABB’s dedicated feeder Intelligent Electronic Device (IED) . As part of the Relion® 620 series , the REF620 is engineered for protection, control, and supervision in utility and industrial power distribution systems, including radial, looped, and meshed networks. Core Overview of the REF620
The REF620 has a sequential event recorder (SER) with up to 250 events and a disturbance recorder (DR). The manual explains:
: Includes multi-frequency admittance-based earth-fault protection, directional overcurrent, arc flash detection (AFD), and high-impedance (HIZ) fault detection.
To maximize the value of your technical manual:
The is the essential reference for engineers working with ABB’s dedicated feeder Intelligent Electronic Device (IED) . As part of the Relion® 620 series , the REF620 is engineered for protection, control, and supervision in utility and industrial power distribution systems, including radial, looped, and meshed networks. Core Overview of the REF620
The REF620 has a sequential event recorder (SER) with up to 250 events and a disturbance recorder (DR). The manual explains:
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