ABB UniGear Series, Engineering Manual

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16 1VLG5 00007 E
Feeder protection and control REF620
The REF620 is a dedicated feeder management relay perfectly aligned for the protection, con-
trol, measurement and supervision of utility and industrial power distribution systems, in-
cluding radial, looped and meshed networks, with or without distributed power generation.
REF620 can also be used to protect feeders including motors or capacitor banks. Addition-
ally, REF620 offers functionality for interconnection protection used with distributed genera-
tion like wind or solar power connection to utility grid. The REF620 can send (1 instance) and
/ or receive (1 instance) voltage over the IEC 61850-9-2LE and to synchrocheck with
IEC 61850-9-2 LE.
Figure 14: Functionality overview of REF620 standard configuration B