The relay Model UFR1001E from ZIEHL industrie-elektronik has proven its reliability in Germany since its introduction with the new German grid-code VDE-AR-N 4105 in January 2012 in more than 20,000 plants for own generation of energy, in grids for low and for medium voltage.
In January 2014 it has been certified according to DIN V VDE 0126-1-1 which is applied in many European countries.
Special certificates are available for UK (G59/3 and G83/2), France (VFR2013, VFR2014), Austria (ÖVE/ÖNORM)
Its preset programs for different grid codes allow installation plug & play.
The UFR1001E monitors each 2 limits for under- and overvoltage and for under- and over-frequency and also vector shift and ROCOF (df/dt, rate of change of frequency). Limits and response times can be easily set in wide ranges.