GE t60 Instruction Manual page 184

5.5 GROUPED ELEMENTS
b) PHASE UNDERVOLTAGE (ANSI 27P)
PATH: SETTINGS GROUPED ELEMENTS
PHASE
UNDERVOLTAGE1
5
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
5-106
SETTING GROUP 1(6)
PHASE UV1
FUNCTION: Disabled
PHASE UV1 SIGNAL
MESSAGE
SOURCE: SRC 1
PHASE UV1 MODE:
MESSAGE
Phase to Ground
PHASE UV1
MESSAGE
PICKUP: 1.000 pu
PHASE UV1
MESSAGE
CURVE: Definite Time
PHASE UV1
MESSAGE
DELAY:
PHASE UV1 MINIMUM
MESSAGE
VOLTAGE: 0.100 pu
PHASE UV1 BLOCK:
MESSAGE
Off
PHASE UV1
MESSAGE
TARGET: Self-reset
PHASE UV1
MESSAGE
EVENTS: Disabled
SETTING
PHASE UV1
MINIMUM VOLTAGE:
<
VAG or VAB Minimum
<
VBG or VBC Minimum
<
VCG or VCA Minimum
Figure 5–59: PHASE UNDERVOLTAGE1 SCHEME LOGIC
T60 Transformer Management Relay
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
1.00 s
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:
<
AND RUN VAG or VAB PICKUP
t
V
<
AND RUN VBG or VBC PICKUP
t
V
<
AND RUN VCG or VCA PICKUP
t
V
5 SETTINGS
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
827039AA.CDR
GE Multilin