Numerical Overcurrent Protection

CHARACTERISTICSAuxiliary Supply• Auxiliary supply ranges• Typical burden• Power off withstand• Memory backupAnalogue Inputs• Phase current inputs In 1 or 5A19 to 70 – 85 to 255 / DC or AC 50 or 60 Hz6W (DC), 6 VA (AC)20 ms72 hoursmeasurement from 0.3 to 24 In – burden at In < 0.2 VAcontinuous rating 3 In, short duration withstand 100 In/1 sdisplay of primary currents from 0 to 64 kA• Earth current input In 0 1 or 5A measurement from 0.03 to 2.4 In 0 – burden at In 0 < 0.5 VAcontinuous rating 2 In 0 , short duration withstand 40 In 0 /1 sdisplay of primary current from 0 to 6.4 kA• Frequency• Phase voltage inputs Un 100 to 120 V• External phase to earth voltage• Recommended CTsLogical Inputs (4, 8 according to relay)• Level 0• Level 1• BurdenRelays Outputs (4, 8 according to relay)• Relay A, B option E, F• Relay C, watchdog, option D, GEarth current input from Ring CT 100/1 adjustment from 0.6 to 48 A primary45-55 or 55-65 Hzmeasurement from 3 to 240 V – continuous rating 240 Vmeasurement from 3 to 240 V – continuous rating 240 V5VA 5P20< 10 V range 19 to 70 Vdc / Vac – < 33 V range 85 to 255 Vdc / Vac> 20 V range 19 to 70 Vdc / Vac – > 37 V range 85 to 255 Vdc / Vac< 15 mAdouble contact NO, permanent current 8 Aclosing capacity 10 A/4 sshort circuit current withstand 100 A/30 msbreaking capacity DC with L/R = 40 ms:50Wbreaking capacity AC with cosϕ = 0. 4:1250 VAchangeover contact, permanent current 16 Aclosing capacity 25 A/4 sshort circuit current withstand 250 A/30 msbreaking capacity DC with L/R = 40 ms:50Wbreaking capacity AC with cosϕ = 0.4:1250 VAPhase and Earth Fault Overcurrent and Directional Functions [50] [51] [67] [50N] [51N] [67N]• Phase fault thresholds1%, between 0.5 and 4 In3% from 0.3 to 0.5 In and from 4 to 24 In• Earth fault thresholds1% from 0.05 to 0.4 In3% from 0.03 to 0.05 In and from 0.4 to 2.4 In• Instantaneous operating time40, 50 or 60 ms including trip relay for I ≥ 2 Is• Independent time delaysfrom 40 ms to 300 s, ± 2% or 20 ms• Timing curves [51] [51N]according to IEC 255-4, ANSI IEEE and configurable (factory set, consult us)• Dependent time delays class 5TransformerThermal Overload [49]• Timing curves according to IEC 255-8• Heating time-constant CTE 4 to 180 min, class 5• Cooling time-constant 1 to 6.0 C TE , in step of 0.1• Negative sequence factor 0 to 9• Load reclosing factor 50 to 100%• Thermal reference current I ref 40 to 130% In, class 5• Thermal alarm threshold 80 to 100% Θ I ref , class 5• Reclosing inhibit thermal threshold 40 to 100% I re ., class 5Cable Thermal Overload [49]• Timing curves according to IEC 255-8• Heating time constant C TE 4 to 180 min, class 5• Alarm threshold 80 to 100% ΘIb, class 5• Trip threshold 0.4 to 1.3 In, class 5Broken Conductor [46BC]• Inv/Iph threshold 10 to 250%• Operating timefrom 40 ms to 300 s• Independent time delays± 2% or 20 ms