CHECK ZONE: (ALL ISOLATOR ARE OPEN) SETTING: IDIFF SUPERVISION = CONTINUE IN OPERATION STABLIZING FACTOR (BZ) = 70% IDIFF THERSHOLD (BZ) = 1.2 A STABLIZING FACTOR (CZ) = 30 % IDIFF THERSHOLD (BZ) = 1.2 A INJECTED CURRENT K FACTOR K FACTOR – – (SLOPE) = ID/IS REMARKS SETTING MEASURED I1 I2 R PH 2.0 – 0.30 Y PH 2.0 – 2.0 B PH – VERIFY THIS CONNECTION: INJECT I1∟0 > 2 IDIFF THRESHOLD (CZ), INCREASE I2∟180 UP TO TRIP, CALCULATE = I2/ (2I1+ I2) BUSBAR PROTECTION DIFF. CURRENT SLOPE TSET: BUS ZONE: (1A & 2A) CONNECTED IN SAME BUS. CURRENT (IA = 1.2A) INJECTED OPERATING ANGLE (IB = 1.2A) IN REFERENCE BAY IN BAY TEST BU WITH 0 & 180 ANGLE SN R PH Y PH B PH R PH Y PH B PH – – – – – – D15 1 0 0 0 & 2 0 0 0
CHECK ZONE: (ALL ISOLATOR ARE OPEN) SETTING: IDIFF SUPERVISION = CONTINUE IN OPERATION STABLIZING FACTOR (BZ) = 70% IDIFF THERSHOLD (BZ) = 1.2 A STABLIZING FACTOR (CZ) = 30 % IDIFF THERSHOLD (BZ) = 1.2 A K – FACTOR (SLOPE) SETTING INJECTED CURRENT K – FACTOR = ID/IS MEASURED REMARKS I1 I2 R – PH 0.30 2.0 Y – PH 2.0 B – PH 2.0 VERIFY THIS CONNECTION: INJECT I1∟0 > 2 IDIFF THRESHOLD (CZ), INCREASE I2∟180 UP TO TRIP, CALCULATE = I2/ (2I1+ I2) BUSBAR PROTECTION DIFF. CURRENT SLOPE TSET: BUS ZONE: (1A & 2A) CONNECTED IN SAME BUS. BU SN CURRENT (IA = 1.2A) INJECTED IN REFERENCE BAY WITH 0 & 180 ANGLE OPERATING ANGLE (IB = 1.2A) IN BAY TEST R – PH Y – PH B – PH R – PH Y – PH B – PH D15 & 1 0 0 0 2 0 0 0
reb500_low_imp.docx