Emax Low voltage air circuit-breakers - ABB Download Center

Protection functions and setting values - PR123Function Trip Threshold Trip Time Can be Relation Thermal Zonethreshold steps Time Step excluded t=f(I) memory selectivityRcDUOTUVOVRVRPUFOFOverloadWith current If = 3xI1protection I1= 0.4….1 x In 0.01 x In t1= 3 s....144 s 3 s (1) – t=k/I 2 ■ –Tolerance (2) Release between ± 10% If ≤ 6 x In1.05 and 1.2 x I1 ± 20% If > 6 x InI1= 0.4….1 x In 0.01 x In With current I = 3xI1 (4) ; t1= 3 s....144 s 3 s – t=k(α) (5)Tolerance Release between ± 20% If > 5 x I1 α = 0.2-1-2 – –1.05 ... 1.2 x I1 ± 30% 2xI1≤ If ≤ 5 x I1Selective short-circuitWith current If > I2protection (4) I2= 0.6….10 x In 0.1 x In t2= 0.05 s….0.8 s 0.01 s ■ t=k – ■t2sel= 0.04 s…..0.2 s0,01 sTolerance (2) ± 7% If ≤ 6 x In The better of the two figures:± 10% If > 6 x In ± 10% or ± 40 msI2= 0.6….10 x In 0.1 x In With current I = 10xIn; t2= 0.05 s…0.8 s 0.01 s ■ t=k/I 2 ■ –Tolerance (2) ± 7% If ≤ 6 x In ± 15% If ≤ 6 x In± 10% If > 6 x In ± 20% If > 6 x InSelective short-circuitWith current If > I2protection I2= 0.6….10 x In 0.1 x In t2= 0.05 s….0.8 s 0.01 s ■ t=k – ■Tolerance (2) ± 7% If ≤ 6 x In The better of the two figures:± 10% If > 6 x In ± 10% or ± 40 msInstantaneousshort-circuitprotection I3= 1.5….15 x In 0.1 x In Instantaneous – ■ t=k – –Tolerance (2) ± 10% ≤ 30 msEarth faultWith current If > I4protection I4 (6) = 0.1*….1 x In 0.02 x In t4= 0.1 s…..1 s 0.05 s ■ t=k – ■t4sel= 0.04 s…..0.2 s0,01 sTolerance (2)The better of the two figures:± 7% ± 10% or ± 40 msI4= 0.1*….1 x In 0.02 x In t4= 0.1 s…..1 s (with I=4xI4) 0.05 s ■ t=k/I 2 – –Tolerance (2) ± 7% ± 15%Residual Currentprotection (7) Id= 3-5-7-10-20-30 A td= 0.06-0.1-0.2-0.3- 0.4- ■ t=k – –0.5-0.8 s (3)Tolerance (2) ± 10%DirectionalWith current If > I7short-circuit I7= 0.6….10 x In 0.1 x In t7= 0.20 s…..0.8 s 0.01 s ■ t=k – ■protectionThe better of the two figures:Tolerance (2) ± 10% ± 10% or ± 40 msPhase unbalance I6= 5%….90% 5% t6= 0.5 s…..60 s 0.5 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 10% ± 20% or ± 100 msProtection againstovertemperature cannot be set – Instantaneous – – temp=k – –Undervoltage I8= 0.5….0.95 x Un 0.01 x In With current U < U8; t8= 0,1 s….5 s 0.1 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 5% ± 20% or ± 40 msOvervoltage I9= 1.05….1.2 x Un 0.01 x In With current U > U9; t9= 0,1 s….5 s 0.1 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 5% ± 20% or ± 40 msResidual voltage I10= 0.1….0.4 x Un 0.05 Un With current U 0 > U10; t10= 0,5 s….30 s 0.5 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 5% ± 10% or ± 100 msReverseWith current P < P11power P11= -0.3….-0.1 x Pn 0.02 Pn t11= 0.5 s…..25 s 0.1 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 10% ± 10% or ± 100 msUnderfrequency f12 = 0.90….0.99 x fn 0.01 fn With current f < f12; t9= 0.5 s….3 s 0.1 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 5% ± 10% or ± 100 msOverfrequency f13 = 1.01….1.10 x fn 0.01 fn With current f > f13; t10= 0.5 s….3 s 0.1 s ■ t=k – –protectionThe better of the two figures:Tolerance (2) ± 5% ± 10% or ± 100 ms4If = fault current* G=0.1xIn with auxiliary power supply 24V DC(1) The minimum trip value is 1 s, regardless of the type of curve set (self-protection)(2) These tolerances hold in the following conditions:- self-powered relay at full power and/or auxiliary power supply (without start-up)- two- or three-phase power supply- trip time set ≥ 100 ms(3) Non intervention time(4) In accordance with IEC 60255-3(5)t = (3α - 1)(I/I1) α -1• t1(3xI1)(6) The minimum trip threshold for the G ext protection with SRG toroid is 0,1 In(7) If selected, Rc protection with PR123/P-LSIG and special rating plug, can replace Gextprotection.The following tolerance values apply in all cases not covered by the above:Trip thresholdTrip timeL Release between 1.05 and 1.25 x I1 ± 20%S ± 10% ± 20%I ± 15% ≤ 60msG ± 15% ± 20%Others ± 20%ABB SACE 4/27