GE L30 Instruction Manual page 307

Line current differential system, ur series
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5 SETTINGS
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
c) PHASE OVERVOLTAGE (ANSI 59P, IEC PTOV)

PATH: SETTINGS
GROUPED ELEMENTS
 PHASE
 OVERVOLTAGE1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The phase overvoltage element may be used as an instantaneous element with no intentional time delay or as a definite
time element. The input voltage is the phase-to-phase voltage, either measured directly from delta-connected VTs or as cal-
culated from phase-to-ground (wye) connected VTs. The specific voltages to be used for each phase are shown below.
GE Multilin
SETTING
PHASE UV1
MINIMUM VOLTAGE:
<
VAG or VAB
Minimum
<
VBG or VBC
Minimum
<
VCG or VCA
Minimum
Figure 5–72: PHASE UNDERVOLTAGE1 SCHEME LOGIC
SETTING GROUP 1(6)
PHASE OV1
FUNCTION: Disabled
PHASE OV1 SIGNAL
SOURCE: SRC 1
PHASE OV1
PICKUP: 1.000 pu
PHASE OV1 PICKUP
DELAY:
1.00 s
PHASE OV1 RESET
DELAY:
1.00 s
PHASE OV1 BLOCK:
Off
PHASE OV1
TARGET: Self-reset
PHASE OV1
EVENTS: Disabled
L30 Line Current Differential System
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


VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: 0.000 to 3.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic Operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5.6 GROUPED ELEMENTS
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
PHASE OVERVOLTAGE1
5-163
5

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