GE G60 Instruction Manual page 205

5 SETTINGS
b) PHASE UNDERVOLTAGE (ANSI 27P)
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PATH: SETTINGS GROUPED ELEMENTS
# PHASE
# UNDERVOLTAGE1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
This element may be used to give a desired 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" will allow a dead source to be considered a fault condition).
SETTING
PHASE UV1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
AND
PHASE UV1
BLOCK:
Off = 0
SETTING
PHASE UV1 SOURCE:
Source VT = Delta
VAB }
VBC
VCA
Source VT = Wye
SETTING
PHASE UV1 MODE:
Phase to Ground Phase to Phase
VAG VAB
VBG VBC
VCG VCA
GE Multilin
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SETTING GROUP 1(6)
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
SETTING
PHASE UV1
MINIMUM VOLTAGE:
<
VAG or VAB Minimum
<
VBG or VBC Minimum
<
VCG or VCA Minimum
Figure 5–77: PHASE UNDERVOLTAGE1 SCHEME LOGIC
G60 Generator Management Relay
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VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: Phase to Ground, Phase to Phase
Range: 0.000 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
SETTING
PHASE UV1
PICKUP:
PHASE UV1
CURVE:
PHASE UV1
DELAY:
<
RUN VAG or VAB PICKUP
AND
t
V
<
AND RUN VBG or VBC PICKUP
t
V
<
RUN VCG or VCA PICKUP
AND
t
V
5.5 GROUPED ELEMENTS
PHASE UNDERVOLTAGE1(2)
FLEXLOGIC OPERANDS
PHASE UV1 A PKP
PHASE UV1 A DPO
PHASE UV1 A OP
PHASE UV1 B PKP
PHASE UV1 B DPO
PHASE UV1 B OP
PHASE UV1 C PKP
PHASE UV1 C DPO
PHASE UV1 C OP
FLEXLOGIC OPERAND
OR PHASE UV1 PKP
FLEXLOGIC OPERAND
OR PHASE UV1 OP
FLEXLOGIC OPERAND
AND PHASE UV1 DPO
827039AB.CDR
5-123
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