CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSM60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 2-212Break 2: 1.50 to 30.00 pu in steps of 0.01Operate time: <¾ cycle at Idiff > 5 × pickupPHASE/NEUTRAL/GROUND TOCCurrent: Phasor or RMSPickup level: 0.020 to 30.000 pu in steps of 0.001Dropout level: 97% to 98% of pickupLevel accuracy:0.1 to 2.0 × CT: ±0.5% of reading or ±0.4% of rated (whichever is greater)> 2.0 × CT: ±1.5% of reading > 2.0 × CT ratingCurve shapes: IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse,Short/Very/ Extremely Inverse; I 2 t; FlexCurves™ (programmable); Definite Time (0.01 s basecurve)Curve multiplier: Time Dial = 0.00 to 600.00 in steps of 0.01Reset type: Instantaneous/Timed (per IEEE)Curve timing accuracy at 1.03 to 20 x pickup:±3.5% of operate time or ±½ cycle (whichever is greater) from pickup to operateVoltage restraint: Modifies pickup current for voltage in the range of 0.1 < V < 0.9 VT Nominal in a fixed linear rela-tionshipPHASE/NEUTRAL/GROUND IOCCurrent: Phasor onlyPickup level: 0.020 to 30.000 pu in steps of 0.001Dropout level: 97 to 98% of pickupLevel accuracy:0.1 to 2.0 × CT rating: ±0.5% of reading or ±0.4% of rated (whichever is greater)> 2.0 × CT rating: ±1.5% of readingOverreach: <2%Pickup delay: 0.00 to 600.00 s in steps of 0.01Reset delay: 0.00 to 600.00 s in steps of 0.01Operate time: <16 ms at 3 × pickup at 60 Hz (Phase/Ground IOC)<20 ms at 3 × pickup at 60 Hz (Neutral IOC)Timer accuracy: ±3% of operate time or ±1/4 cycle (whichever is greater)PHASE DIRECTIONAL OVERCURRENTRelay connection: 90 ° (quadrature)Quadrature voltage: ABC phase seq.: phase A (V BC), phase B (VCA ), phase C (VAB); ACB phase seq.: phase A (VCB), phaseB (VAC ), phase C (V BA )Polarizing voltage threshold: 0.004 to 3.000 pu in steps of 0.001Current sensitivity threshold: 0.05 puCharacteristic angle: 0 to 359° in steps of 1Angle accuracy: ±2°Operation time (FlexLogic operands):Tripping (reverse load, forward fault): <12 ms, typicallyBlocking (forward load, reverse fault): <8 ms, typicallyNEUTRAL DIRECTIONAL OVERCURRENTDirectionality: Co-existing forward and reversePolarizing: Voltage, Current, Dual, Dual-V, Dual-IPolarizing voltage: V_0 or VXPolarizing current: IGOperating current: I_0Level sensing: 3 × (|I_0| – K × |I_1|), IGRestraint, K: 0.000 to 0.500 in steps of 0.001Characteristic angle: –90 to 90° in steps of 1Limit angle: 40 to 90° in steps of 1, independent for forward and reverseAngle accuracy: ±2°
