CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSN60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL 2-152Timers: 0.000 to 65.535 s in steps of 0.001Timer accuracy: ±3% of operate time or ±1/4 cycle (whichever is greater)OPEN POLE DETECTORFunctionality: Detects an open pole condition, monitoring breaker auxiliary contacts, the current in eachphase, and optional voltages on the lineCurrent pickup level: 0.000 to 30.000 pu in steps of 0.001Line capacitive reactances (XC1 , X C0 ): 300.0 to 9999.9 sec. in steps of 0.1Remote current pickup level: 0.000 to 30.000 pu in steps of 0.001Current dropout level: pickup + 3%, not less than 0.05 puTHERMAL OVERLOAD PROTECTIONThermal overload curves: IEC 255-8 curveBase current: 0.20 to 3.00 pu in steps of 0.01Overload (k) factor: 1.00 to 1.20 pu in steps of 0.05Trip time constant: 0 to 1000 min. in steps of 1Reset time constant: 0 to 1000 min. in steps of 1Minimum reset time: 0 to 1000 min. in steps of 1Timer accuracy (cold curve): ±100 ms or 2%, whichever is greaterTimer accuracy (hot curve): ±500 ms or 2%, whichever is greater for I p < 0.9 × k × Ib and I / (k × I b ) > 1.1TRIP BUS (TRIP WITHOUT FLEXLOGIC)Number of elements: 6Number of inputs: 16Operate time: <2 ms at 60 HzTimer accuracy: ±3% or 10 ms, whichever is greater2.4.2 User-programmable elementsFLEXLOGICProgramming language: Reverse Polish Notation with graphical visualization (keypad programmable)Lines of code: 512Internal variables: 64Supported operations: NOT, XOR, OR (2 to 16 inputs), AND (2 to 16 inputs), NOR (2 to 16 inputs), NAND (2 to 16 inputs),latch (reset-dominant), edge detectors, timersInputs: any logical variable, contact, or virtual inputNumber of timers: 32Pickup delay: 0 to 60000 (ms, sec., min.) in steps of 1Dropout delay: 0 to 60000 (ms, sec., min.) in steps of 1FLEXCURVES™Number: 4 (A through D)Reset points: 40 (0 through 1 of pickup)Operate points: 80 (1 through 20 of pickup)Time delay: 0 to 65535 ms in steps of 1FLEX STATESNumber: up to 256 logical variables grouped under 16 Modbus addressesProgrammability: any logical variable, contact, or virtual inputFLEXELEMENTS™Number of elements: 16Operating signal: any analog actual value, or two values in differential modeOperating signal mode: signed or absolute valueOperating mode: level, deltaComparator direction: over, underPickup Level: –90.000 to 90.000 pu in steps of 0.001
