Feeder Protection Relay REF 610 - APE Distribuidor ABB

Feeder Protection RelayREF 6101MRS756295(continued)Feature Stage I> Stage I>> Stage I>>>Resetting time, maximum 50 ms b) 50 ms 50 msRetardation time, typical 30 ms 30 ms 30 msSet resetting time, t r>0.05...2.50 sDrop-off/pick-up ratio, typical 0.96 0.96 0.96Operate time accuracy• at definite-time characteristic• at IDMT characteristic accordingto IEC 60255-3:accuracy class index E• at IDMT characteristic accordingto IEEE C37.112• at RI-type characteristic• at RD-type characteristic(RXIDG)Operation accuracy• 0.3...0.5 x I n• 0.5...5.0 x I n• 5.0...35.0 x I n±2% of the setoperate time or±25 ms5±7% of the calculatedoperatetime±7% of the calculatedoperatetime±7% of the calculatedoperatetime±5% of the setstart value±3% of the setstart value±2% of the setoperate time or±25 ms±3% of the setstart value±3% of the setstart value±2% of the setoperate time or±25 ms±3% of the setstart value±3% of the setstart valuea) As the maximum measured current is 50 × I n, a predefined current setting of 2.5 x I nis used for the operate timecalculation at IDMT mode of operation, if the set start value is greater than 2.5 x I n. This will speed up the operationof the relay making the operate time shorter than the theoretical IDMT curve would imply. However, the stage alwaysstarts according to the set start value.b) Resetting time of the trip signal.Stages I 0> and I 0>>Feature Stage I> Stage I>>Set start value, I 0> and I 0>>• at definite-time characteristic1.0...100% I n5.0...800% I n• at IDMT characteristica)1.0...100% I nStart time, typical 60 ms 50 msABB 13