Injection Slope1 Slope1 Slope1 Slope1 I 1st 2nd bias Slope Slope IN 3I0 IN 3I0 1.25 A 1.50 A HV 3I0 & 2.536 A HV IN 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 Injected Current Phase Id Min Setting ROA Meas. ROA 3I0 IN 3I0 0.1 A 0.1 A 0.1 x IB 600 ∟00 ∟00 IN Limits : 20 ms typically at 0 to 10 x Id LV REF (REFPDIF) DIRECTIONALITY CHECK: Limits : ± 2.0 degre
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
tr_differential_ret670.docx