Function Range or value AccuracyDefinite time delay, low step (step 1) at 0to 1.2 x Uset(0.00 - 6000.00) s ±0.2% or ±45 mswhichever is greaterDefinite time delay, high step (step 2) at 0to 1.2 x Uset(0.000-60.000) s ±0.2% or ±45 mswhichever is greaterMinimum operate time, Inversecharacteristics(0.000-60.000) s ±0.2% or ±45 mswhichever is greaterOperate time, start at 0 to 2 x Uset Min. = 15 msMax. = 30 ms-Reset time, start at 2 x Uset to 0 Min. = 15 msMax. = 30 ms-Operate time, start at 0 to 1.2 x Uset Min. = 20 msMax. = 35 ms-Reset time, start at 1.2 x Uset to 0 Min. = 5 msMax. = 25 ms-Critical impulse time 10 ms typically at 0 to 2 x Uset -Impulse margin time 15 ms typically -9.3 Two step residual overvoltage protectionROV2PTOV IP14546-1 v49.3.1 IdentificationSEMOD54295-2 v6Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberTwo step residual overvoltageprotectionROV2PTOV2(U0>)IEC15000108 V1 EN-US59N9.3.2 Functionality M13808-3 v11Residual 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 itfrom a single voltage input transformer fed from an open delta or neutral pointvoltage transformer.ROV2PTOV has two voltage steps, each with inverse or definite time delay.A reset delay ensures operation for intermittent earth faults.Section 9 1MRK 505 394-UEN AVoltage protection254 Line differential protection RED650 2.2 IECTechnical manual
