CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSC70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL 2-1722.5.1 Protection elementsThe operating times include the activation time of a trip rated form-A output contact unless otherwise indicated. FlexLogicoperands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect with otherprotection or control elements of the relay, building FlexLogic equations, or interfacing with other intelligent electronicdevices (IEDs) or power system devices via communications or different output contacts. If not specified, the operate timesgiven here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.VOLTAGE DIFFERENTIALOperation: per phaseAuto-setting: on demand from keypad, per phaseNumber of elements: 1 per VT bank, maximum of 3Matching factor: 0.5000 to 2000.0000 in steps of 0.0001, per phaseNumber of trip/alarm stages: 4 per phase with individual timers per stagePickup threshold: 0.001 to 1.000 pu of bus voltage in steps of 0.001Pickup level accuracy: 0.003 puHysteresis: 3% or 0.0005 pu, whichever is greaterPickup delay: 0 to 600.00 s in steps of 0.01Timer accuracy: ±3% of operate time or ±35 ms, whichever is greaterOperate time: <35 ms at 60 HzCAPACITOR CONTROLFunctionality: contains remote/local and auto/manual non-volatile latches, collects trip, open and close inputrequests and issues outputs to control tripping and closingClosing inhibit delay: 0 to 60 minutes in steps of 1 secondTrip and close seal-in timers: 0 to 60.000 s in steps of 0.001AUTOMATIC VOLTAGE REGULATORNumber of elements: 1 per CT/VT module, maximum of 3Modes: voltage with load drop compensation or reactive power with power factor limitMinimum voltage supervision: 0.500 to 1.500 pu in steps of 0.001Close voltage level: 0.750 to 1.500 pu in steps of 0.001Open voltage level: 0.750 to 1.500 pu in steps of 0.001Voltage pickup accuracy: ±0.5% of setting from 10 to 208 VClose reactive power level: –1.50 to 1.50 pu in steps of 0.01Open reactive power level: –1.50 to 1.50 pu in steps of 0.01Power pickup accuracy: ±0.05 puPower factor limit 0.50 to 1.00 in steps of 0.01Power factor accuracy: ±0.05Hysteresis: 0.02 pu (voltage); 0.05 pu (vars)Close delay: 0 to 65.353 s in steps of 0.001Open delay: 0 to 65.353 s in steps of 0.001Timer accuracy: ±3% of operate time or ±20 ms, whichever is greaterOperate time: <80 ms at 60 HzPHASE/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 0.01
