9.2.8 Technical dataTable 165:OV2PTOV technical dataFunction Range or value AccuracyOperate voltage,step 1 and 2(1-200)% ofUBase ± 0.5% of Ur at U < Ur± 0.5% of U at U > UrReset ratio >98% -Inverse timecharacteristics forsteps 1 and 2, seetable 577- See table 577Definite time delay,step 1(0.00 - 6000.00) s ± 0.5% ± 25 msDefinite time delays,step 2(0.000-60.000) s ± 0.5% ± 25 msMinimum operatetime, Inversecharacteristics(0.000-60.000) s ± 0.5% ± 25 msOperate time, startfunction30 ms typically at 0 to 2 x Uset -Reset time, startfunction40 ms typically at 2 to 0 x Uset -Critical impulse time 10 ms typically at 0 to 2 x Uset -Impulse margin time 15 ms typically -9.3 Two step residual overvoltage protectionROV2PTOV9.3.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberTwo step residual overvoltageprotectionROV2PTOV3U0>IEC10000168 V1 EN59N9.3.2 FunctionalityResidual voltages may occur in the power system during earth faults.Two step residual overvoltage protection ROV2PTOV function calculates theresidual voltage from the three-phase voltage input transformers or measures it froma single voltage input transformer fed from an open delta or neutral point voltagetransformer.Section 9 1MRK 502 048-UEN AVoltage protection270Technical manual
