RefleX 231 – 2W and 3W differential protection including REF function
This relay consists of two (three) independent Reflex modules interconnected only by optical fibers. This unique design makes it is unnecessary to route HV, (MV) and LV currents through one single cubicle.
The relay has 2.harmonic and 5.harmonic blocking to avoid tripping during CT-saturation or when energizing a power transformer. Compensation for CT ratio and transformer vector group is integrated, so intermediate CT’s are not needed. The relay is very easy to install and operate.
The Restricted Earth Fault function (REF) gives added protection during earth faults in directly grounded systems, but the function can be disabled if the user only wants to use the unit as a differential relay. The relay is very well suited to protect 2w transformers or 3w transformers of any size, generators, motors, reactors, busbars with max 3 branches and cables/lines less than 1000 meters in length.