Metering Devices, Protective Relays, Software and ... - Mercado-ideal

22.4Metering Devices, Protective Relays, Software and ConnectivityProtective Relays222222222222222222222222222222222222222222222222222222222222Protection Elements TolerancesNotice: The tripping delay relates to the time between alarmand trip. The tolerance of the operating time relates to the timebetween when the measured value has exceeded the thresholduntil the protection element is picked up.DescriptionToleranceDifferential Protection Stages: 87[x]Id > 0.1 Id[x]±3% of the setting value resp. 1% I nOperating time Id > 0.3 x I n < 35 msId > 0.5 x I n < 25 msId > 1.5 x I n < 20 msGround Differential Protection Stages: 87GD[x]Id > 0.1 Id[x]±3% of the setting value resp. 1% I nOperating time Ide > 0.3 x I n < 35 msIde > 0.5 x I n < 25 msIde > 1.5 x I n < 20 msOvercurrent Protection Elements: 50P[x], 51P[x]Pickup±1.5% of the setting value resp. 1% I nResetting ratio97% or 0.5% x I ntDEFT±1% resp. ±10 msOperating time Starting from I higherthan 1.1 x I>