GE Multilin G30 Generator Protection System 5-1995 SETTINGS 5.6 GROUPED ELEMENTS5f) AUXILIARY UNDERVOLTAGE (ANSI 27X, IEC PTUV)PATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS AUXILIARY UV1(2)The G30 contains one auxiliary undervoltage element for each VT bank. This element is intended for monitoring undervolt-age conditions of the auxiliary voltage. The AUX UV1 PICKUP selects the voltage level at which the time undervoltage ele-ment starts timing. The nominal secondary voltage of the auxiliary voltage channel entered under SETTINGS SYSTEMSETUP AC INPUTS VOLTAGE BANK X5 AUXILIARY VT X5 SECONDARY is the per-unit base used when setting thepickup level.The AUX UV1 DELAY setting selects the minimum operating time of the auxiliary undervoltage element. Both AUX UV1 PICKUPand AUX UV1 DELAY settings establish the operating curve of the undervoltage element. The auxiliary undervoltage elementcan be programmed to use either definite time delay or inverse time delay characteristics. The operating characteristicsand equations for both definite and inverse time delay are as for the phase undervoltage element.The element resets instantaneously. The minimum voltage setting selects the operating voltage below which the element isblocked.Figure 5–85: AUXILIARY UNDERVOLTAGE SCHEME LOGIC AUXILIARY UV1AUX UV1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE AUX UV1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4MESSAGE AUX UV1 PICKUP:0.700 puRange: 0.000 to 3.000 pu in steps of 0.001MESSAGE AUX UV1 CURVE:Definite TimeRange: Definite Time, Inverse TimeMESSAGE AUX UV1 DELAY:1.00 sRange: 0.00 to 600.00 s in steps of 0.01MESSAGE AUX UV1 MINIMUM:VOLTAGE: 0.100 puRange: 0.000 to 3.000 pu in steps of 0.001MESSAGE AUX UV1 BLOCK:OffRange: FlexLogic operandMESSAGE AUX UV1 TARGET:Self-resetRange: Self-reset, Latched, DisabledMESSAGE AUX UV1 EVENTS:DisabledRange: Disabled, Enabled827849A3.CDRFLEXLOGIC OPERANDSAUX UV1FUNCTION:AUX UV1 BLOCK:AUX UV1 SIGNALSOURCE:AUX UV1 MINIMUMVOLTAGE:AUX UV1 DPOAUX UV1 OPAUX UV1 PKPRUNSETTINGSETTINGAUX UV1 CURVE:AUX UV1 DELAY:AUX UV1 PICKUP:SETTINGEnabled=1SETTINGSETTINGOff=0AUX VOLT Vx Vx MinimumVx PickuptV<<AND
