HV Winding Id min. Set Value Calculated value (A) Measured ( A ) Drop Out Pick Up Ratio Operating Time @ 2X I pick up (ms) Pick up Drop out R 0.1 0.3 0.5 Y 0.1 0.3 0.5 B 0.1 0.3 0.5 LV Winding Id min. Set Value Calculated value ( A ) Measured Value ( A ) Drop Out Pickup Operating Time @ 2X I pickup (ms) Pick up Drop out R 0.1 0.3 0.5 Y 0.1 0.3 0.5 B 0.1 0.3 0.5
Ibias A IH.V = Ibias / kHV A Expected IL.V = (Ibias – Id) / kLV (A) Id calculated Measured IL.V (A) Errors % R Y B R Y B 1.25 0.300 1.50 0.400 1.75 0.500 2.00 0.600 2.25 0.700 2.50 0.800 Limits; ± 2 %Ir According to the Technical Reference Catalogue – Page24 SLOPE Secton3 (All Values as an example) Repeat the test and check the result with the following equation; When bias current is more than: Ibias ≥ End section2 Trip Id = (Idmin + slope section2/100*(End section2 - End section1)) + (Slope section3/100 * (Ibias- End section2)) A Set End section1 = 1.25 End section2 =3.0 section1 = 40% Slope section2 = 80% Idmin = 0.3 I bias A IH.V = Ibias / kHV A Expected IL.V = (Ibias – Id) / kLV (A) Id calculated Measured IL.V (A) Errors % R Y B R Y B 3.0 1.000 3.5 1.400
Injection I bias 1st Slope 2nd Slope Slope1 IN Slope1 3I0 Slope1 IN Slope1 3I0 HV 3I0 & HV IN 1.25 A 1.50 A 2.536 A 3.00 A 5.00 A LV REF: PICK/UP AND DROP/OFF TEST Idiff = IN + 3I0 Ibias = the highest current at 3 Phases or Neutral Inj. Current to Setting value P/Up (A) D/Off (A) IN 10% IB IN 20% IB Limits : ± 2.0% of Ir at I £ Ir ± 2.0% of I at I > Ir ratio > 95% TIMING TEST: Inj. Curr. to Setting value Inj current (A) Meas time (ms) Remarks IN 10% IB Limits : 20 ms typically at 0 to 10 x Id LV REF (REFPDIF) DIRECTIONALITY CHECK: Phase Id Min Setting ROA Injected Current Meas. ROA 3I0 IN 3I0 0.1 x IB 600 0.1 A ∟00 0.1 A ∟00 IN Limits : ± 2.0 degre
SLOPE TEST: As per technical reference manual page 147, 148: End zone 1=1.25*IB End zone 2=2.536*IB (calculated from the at our setting Idmin=10%). First Slope =70%. Second Slope =100%. Injection Current Injected I diff I bias 1st 2nd Slope Remarks Slope1 IN Slope1 3I0 Slope1 IN Slope1 3I0 HV 3I0 & HV IN 1.25 A 1.50 A 2.536 A 3.00 A WINDING-1 OVERCURRENT & EARTH FAULT PROTECTION TEST PICK/UP AND DROP/OFF TEST Current Setting Amps I> OC4TOC: 1 Current Setting Amps Io> EF4TOC: 1 [IO>] R Y B N Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off 1xIn = 1 0.1xIn = 0.1 1.5xIn = 1.5 0.3xIn = 0.3 Limits : ± 1.0% of Ir at I £ Ir ± 1.0% of I at I > Ir ratio > 95% TIMING TEST FUNCTION INJECT CURRENT AMPS EXPECTED TIME SEC OPERATING TIME (SEC), TMS = 1.0 RANGE SEC R Y B N IEC NORMAL INVERSE 2 x Isetting 10.03 10.52 – 9.519 10 x Isetting 2.97 3.188 – 2.82 IEC NORMAL INVERSE 2 x Isetting 13.5 14.175 – 12.825 10 x Isetting 1.5 1.57 – 1.42
IEC NORMAL INVERSE 2 x Isetting 26.67 28.00 – 25.336 10 x Isetting 0.808 0.848 – 0.767 IEC NORMAL INVERSE 2 x Isetting 120 126 – 114 10 x Isetting 13.333 13.999 – 12.666 Limits: IEC 60255-3, class 5 + 40 ms WINDING 2 OVERCURRENT& EARTH FAULT PROTECTION TEST PICK/UP AND DROP/OFF TEST Current Setting Amps I> OC4TOC: 2 Current Setting Amps Io> EF4TOC: 2 [IO>] R Y B N Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off 1xIn = 1 0.1xIn = 0.1 1.5xIn = 1.5 0.3xIn = 0.3 Limits : ± 1.0% of Ir at I £ Ir ± 1.0% of I at I > Ir TIMING TEST FUNCTION INJECT CURRENT AMPS EXPECTED TIME SEC OPERATING TIME (SEC), TMS = 1.0 RANGE SEC R Y B N IEC NORMAL INVERSE 2 x Isetting 10.03 10.52 – 9.519 10 x Isetting 2.97 3.188 – 2.82 IEC NORMAL INVERSE 2 x Isetting 13.5 14.175 – 12.825 10 x Isetting 1.5 1.57 – 1.42 IEC NORMAL 2 x Isetting 26.67 28.00 – 25.336
INVERSE 10 x Isetting 0.808 0.848 – 0.767 IEC NORMAL INVERSE 2 x Isetting 120 126 – 114 10 x Isetting 13.333 13.999 – 12.666 Limits : IEC class 5 + 40 ms RESIDUAL OVER CURRENT (EF4PTOC:3) STEP 1 NEUTRAL PICK UP AND DROP-OFF TEST: Current Setting Amps Io> EF4TOC: 3 [IO>] N Pick Up Drop Off = 0.03 0.05xIn = 0.05 TIMING TEST INJECTED CURRENT Amps TIME SETTING sec OPERATING TIME N 0.05 0.1 Limits: ± 0.5% of set time ± 10 ms RESIDUAL OVER CURRENT (EF4PTOC:3) STEP 2 SENSITIVE EARTH FAULT PICK UP AND DROP-OFF TEST: Current Setting Amps Io>> EF4TOC: 3 [IO>>] N Pick Up Drop Off
0.05xIn = 0.05 0.1xIn = 0.1 Limits: ± 1.0% of Ir at I £ Ir ± 1.0% of I at I > Ir TIMING TEST Ion=1A, Is (Io>>) =0.3 x Ion =0.3A, FUNCTION INJECT CURRENT AMPS EXPECTED TIME SEC OPERATING TIME (SEC), TMS = 1.0 RANGE SEC N IEC NORMAL INVERSE 2 x Isetting 10.03 10.52 – 9.519 10 x Isetting 2.97 3.188 – 2.82 IEC NORMAL INVERSE 2 x Isetting 13.5 14.175 – 12.825 10 x Isetting 1.5 1.57 – 1.42 IEC NORMAL INVERSE 2 x Isetting 26.67 28.00 – 25.336 10 x Isetting 0.808 0.848 – 0.767 IEC NORMAL INVERSE 2 x Isetting 120 126 – 114 10 x Isetting 13.333 13.999 – 12.666 Limits : IEC class 5 + 40 ms 15 : BREAKER FAILURE (CCRBRF:2) 15.1: PICK UP TEST: