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%. Current Injected 2nd I diff I bias 1st Remarks Slope1 Slope1 Slope1 Slope1 Injection Slope IN 3I0 IN 3I0 1.25 A HV 3I0 1.50 A & 2.536 A HV IN 3.00 A WINDING-1 OVERCURRENT & EARTH FAULT PROTECTION TEST PICK/UP AND DROP/OFF TEST OC4TOC: 1 EF4TOC: 1 [IO>] Current Current Setting R Y B Setting N Amps Amps Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off Pick Up Drop Off I> Io> 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 OPERATING TIME (SEC), TMS = 1.0 INJECT EXPECTED RANGE CURRENT TIME FUNCTION SEC AMPS SEC R Y B N 2 x 10.03 10.52 9.519 IEC – Isetting NORMAL 10 x INVERSE 2.97 3.188 2.82 – Isetting 2 x 13.5 14.175 12.825 IEC – Isetting NORMAL 10 x INVERSE 1.5 1.57 1.42 – Isetting
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
tr_differential_ret670.docx