| Description de l'article | UFR1001E, sealable voltage and frequency relay, na-protection AC/DC 24-270V / na-box, grid- and plant protection acc. To VDE-ar-n 4105 (VDE-FNN), VDE-ar-n 4110, BDEW-directive and DIN v VDE 0126-1-1 certificates acc. To öve/önorm e 8001-4-712:2009-12, DIN v VDE v 0126-1-1/A1 VFR2013/VFR2014 certificate of compliance G59/3:2013, G83/2:2012, G99/1-1+2+3:2018 und G98/1-1+2:2018 voltage and frequency relay monitoring of over- and underfrequency, voltage and 10-MINUTES-AVERAGE monitoring of vector-shift ROCOF, monitoring of rate of change of frequency DF/DT one-fault-proof with monitoring of function of connected switches passive detection of insular grid measuring ranges 15-520 V / 45-65 HZ measuring of true RMS response time adjustable 0, 05...130, 0 s, switch back delay 0...999 s 4 digit digital display for measured values and programming preset programs for different applications limits a |