GE D30 Instruction Manual page 464
Line distance protection system
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GROUPED ELEMENTS
5.7.12.2 Phase undervoltage (ANSI 27P, IEC PTUV)
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS PHASE UNDERVOLTAGE1(3)
PHASE
UNDERVOLTAGE1
5
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 time
element. The element resets instantaneously if the applied voltage exceeds the dropout voltage. The delay setting selects
the minimum operating time of the phase undervoltage. The minimum voltage setting selects the operating voltage below
which the element is blocked (a setting of "0" allows a dead source to be considered a fault condition).
5-254
PHASE UV1
FUNCTION: Disabled
PHASE UV1 SIGNAL
SOURCE: SRC 1
PHASE UV1 MODE:
Phase to Ground
PHASE UV1
PICKUP: 1.000 pu
PHASE UV1
CURVE: Definite Time
PHASE UV1
DELAY: 1.00 s
PHASE UV1 MINIMUM
VOLTAGE: 0.100 pu
PHASE UV1 BLOCK:
Off
PHASE UV1
TARGET: Self-reset
PHASE UV1
EVENTS: Disabled
Figure 5-142: Phase undervoltage1 logic
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: Phase to Ground, Phase to Phase
Range: 0.004 to 3.000 pu in steps of 0.001
Range: Definite Time, Inverse Time
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.000 to 3.000 pu in steps of 0.001
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
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