CHAPTER 1: INTRODUCTION SPECIFICATIONS869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–15OUT-OF-STEP (78)Characteristic: ......................................................Single blinder with offset mho supervisoryMeasured Impedance:......................................Positive-sequenceCurrent Supervision Pickup Level:...............0.05 to 10.00 x CT in steps of 0.01 x CTFwd/Reverse Reach (sec.): ..............................0.10 to 500.00 Ω in steps of 0.01 ΩLeft and Right Blinders (sec.): ........................0.10 to 500.00 Ω in steps of 0.01 ΩImpedance Accuracy: ......................................±5%Blinder RCA: ...........................................................40 to 90º in steps of 1ºAngle Accuracy: ..................................................± 2ºTimer Accuracy: ..................................................±3% of operate time or ±¼ cycle (whichever is greater)OVERFREQUENCY (81O)Pickup Level:..........................................................20.00 to 65.00 Hz in steps of 0.01Dropout Level: ......................................................Pickup - 0.03 HzPickup Time Delay:.............................................0.000 to 6000.000 s in steps of 0.001 sDropout Time Delay: .........................................0.000 to 6000.000 s in steps of 0.001 sMinimum Operating Voltage: ........................0.000 to 1.250 x VT in steps of 0.001 x VTLevel Accuracy:....................................................± 0.001 HzTimer Accuracy: ..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)from pickup to operateOperate Time:.......................................................typically 7.5 cycles at 0.1 Hz/s changetypically 7 cycles at 0.3 Hz/s changetypically 6.5 cycles at 0.5 Hz/s changeFASTPATH:Typical times are average Operate Times including variables such as frequency changeinstance, test method, etc., and may vary by ± 0.5 cycles.OVERLOAD ALARMOperating Parameter:.......................................Average phase current (RMS)Pickup Level:..........................................................0.50 to 3.00 x FLA in steps of 0.01 x FLADropout Level: ......................................................97 to 98% of PickupLevel Accuracy:....................................................For 0.1 to 2.0 x CT: ±0.5% of reading or ±0.4% of rated,whichever is greater; For > 2.0 × CT rating ±1.5% of readingPickup Delay: ........................................................0.00 to 180.00 s in steps of 0.01 sDropout Delay:.....................................................0.00 to 180.00 s in steps of 0.01 sTimer Accuracy: ..................................................±3% of delay setting or ± ½ cycle (whichever is greater) frompickup to operatePERCENT DIFFERENTIAL (87S)Methods: .................................................................Internal summation and Core balancePickup Level:..........................................................0.05 to 1.00 x CT in steps of 0.01Slope 1 and 2: .......................................................1 to 100% in steps of 1Break 1:....................................................................0.50 to 2.00 x CT in steps of 0.01Break 2:....................................................................2.00 to 30.00 x CT in steps of 0.01Operate Time:.......................................................<16 ms at >3 × Pickup at 60 Hz;<20 ms at >3 × Pickup at 50 HzPHASE DIRECTIONAL OVERCURRENT (67P)Relay Connection: ..............................................90º(Quadrature)Quadrature Voltage: ..........................................ABC phase seq.: phase A (Vbc), phase B (Vca), phase C (Vab);ACB phase seq.: phase A (Vcb), phase B (Vac), phase C (Vba)Polarizing Voltage Threshold:........................0.050 to 3.000 x VT in steps of 0.001 x VTCurrent Sensitivity Threshold: .......................0.05 x CTCharacteristic Angle:.........................................0º to 359º in steps of 1°Angle Accuracy: ..................................................± 2ºOperation Time (FlexLogic™ operands): ..Reverse to Forward transition: < 12 ms, typically;Forward to Reverse transition: <8 ms, typically
