REU610 is a voltage IED for system voltage protection, measuring and supervising in utility and industrial power systems. REU610 is a member of ABB’s Relion
® product family and part of its 610 product series. The series includes IEDs for feeder protection, motor protection and general system voltage supervision. The plug-in design facilitates the commissioning of the switchgear and enables fast and safe insertion and withdrawal of IED plug-in units.
REU610 is designed for distribution substation busbar overvoltage and undervoltage protection, feeder and power transformer overvoltage protection, motor undervoltage protection, and capacitor bank protection and supervision. In isolated neutral power systems, it is also used for non-discriminative earth-fault protection based on residual voltage measurement. REU610 is used for initializing automatic substation busbar changeover and for disconnecting small power units from the public network, ie. islanding.
REU610 is also suitable for employment in marine and off-shore environments. The 610 series IEDs have been certificated for marine and off-shore use by Det Norske Veritas (DNV).
REU610 supports IEC 61850, IEC 60870-5-103, Modbus®, Profibus, DNP3, SPA and LON.