5-254 D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUALGROUPED ELEMENTS CHAPTER 5: SETTINGS55.7.12.2 Phase undervoltage (ANSI 27P, IEC PTUV)SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS PHASE UNDERVOLTAGE1(3)This element is used to give a time-delay operating characteristic versus the applied fundamental voltage (phase-to-ground or phase-to-phase for wye VT connection, or phase-to-phase for delta VT connection) or as a definite timeelement. The element resets instantaneously if the applied voltage exceeds the dropout voltage. The delay setting selectsthe minimum operating time of the phase undervoltage. The minimum voltage setting selects the operating voltage belowwhich the element is blocked (a setting of “0” allows a dead source to be considered a fault condition).Figure 5-142: Phase undervoltage1 logic PHASE UNDERVOLTAGE1 PHASE UV1FUNCTION: DisabledRange: Disabled, Enabled PHASE UV1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2 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 PHASE UV1TARGET: Self-resetRange: Self-reset, Latched, Disabled PHASE UV1EVENTS: DisabledRange: Disabled, Enabled
