CHAPTER 5: SETTINGS GROUPED ELEMENTSL60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 5-2655The undervoltage delay setting defines the family of curves shown as follows.Eq. 5-27whereT = operating timeD = undervoltage delay setting (D = 0.00 operates instantaneously)V = secondary voltage applied to the relayVpickup = pickup levelFigure 5-147: Inverse time undervoltage curvesAt 0% of pickup, the operating time equals the PHASE UNDERVOLTAGE DELAY setting.5.6.14.2 Phase undervoltage (ANSI 27P, IEC PTUV)SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS PHASE UNDERVOLTAGE1(3) PHASE UNDERVOLTAGE1 PHASE UV1FUNCTION: DisabledRange: Disabled, Enabled PHASE UV1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4 PHASE UV1 MODE:Phase to GroundRange: Phase to Ground, Phase to Phase PHASE UV1PICKUP: 1.000 puRange: 0.004 to 3.000 pu in steps of 0.001 PHASE UV1CURVE: Definite TimeRange: Definite Time, Inverse Time PHASE UV1DELAY: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01 PHASE UV1 MINIMUMVOLTAGE: 0.100 puRange: 0.000 to 3.000 pu in steps of 0.001 PHASE UV1 BLOCK:OffRange: FlexLogic operand
