GE L90 Instruction Manual page 352

5.6 GROUPED ELEMENTS
SETTING
PHASE OV1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
AND
PHASE OV1
BLOCK:
Off = 0
SETTING
PHASE OV1
SOURCE:
Source VT = Delta
VAB
VBC
VCA
Source VT = Wye
If the source VT is wye-connected, then the phase overvoltage pickup condition is
and V .
CA
NOTE
d) NEUTRAL OVERVOLTAGE (ANSI 59N, IEC PTOV)
PATH: SETTINGS GROUPED ELEMENTS
5
NEUTRAL OV1
There are three neutral overvoltage elements available. The neutral overvoltage element can be used to detect asymmetri-
cal system voltage condition due to a ground fault or to the loss of one or two phases of the source. The element responds
to the system neutral voltage (3V_0), calculated from the phase voltages. The nominal secondary voltage of the phase volt-
age channels entered under
p.u. base used when setting the pickup level.
The neutral overvoltage element can provide a time-delayed operating characteristic versus the applied voltage (initialized
from FlexCurves A, B, or C) or be used as a definite time element. The
the
NEUTRAL OV1 CURVE
5-206
SETTING
PHASE OV1
PICKUP:
RUN
VAB PICKUP ≥
RUN
VBC PICKUP
≥
RUN
VCA PICKUP
≥
Figure 5–107: PHASE OVERVOLTAGE SCHEME LOGIC
SETTING GROUP 1(6)
NEUTRAL OV1
FUNCTION: Disabled
NEUTRAL OV1 SIGNAL
MESSAGE
SOURCE: SRC 1
NEUTRAL OV1 PICKUP:
MESSAGE
0.300 pu
NEUTRAL OV1 CURVE:
MESSAGE
Definite time
NEUTRAL OV1 PICKUP:
MESSAGE
DELAY: 1.00 s
NEUTRAL OV1 RESET:
MESSAGE
DELAY: 1.00 s
NEUTRAL OV1 BLOCK:
MESSAGE
Off
NEUTRAL OV1 TARGET:
MESSAGE
Self-reset
NEUTRAL OV1 EVENTS:
MESSAGE
Disabled
SETTINGS SYSTEM SETUP
setting is "Definite time". The source assigned to this element must be configured for a phase VT.
L90 Line Current Differential System
SETTINGS
PHASE OV1 PICKUP
DELAY:
PHASE OV1 RESET
DELAY:
t PKP
t RST
t PKP
t RST
t PKP
t RST
VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.000 to 3.000 pu in steps of 0.001
Range: Definite time, FlexCurve A, FlexCurve B,
FlexCurve C
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
AC INPUTS VOLTAGE BANK
NEUTRAL OV1 PICKUP DELAY
5 SETTINGS
FLEXLOGIC OPERANDS
PHASE OV1 A PKP
PHASE OV1 A DPO
PHASE OV1 A OP
PHASE OV1 B PKP
PHASE OV1 B DPO
PHASE OV1 B OP
PHASE OV1 C PKP
PHASE OV1 C DPO
PHASE OV1 C OP
FLEXLOGIC OPERAND
OR PHASE OV1 OP
FLEXLOGIC OPERAND
PHASE OV1 DPO
AND
FLEXLOGIC OPERAND
OR
PHASE OV1 PKP
827066A7.CDR
V 3 Pickup for V , V
AB BC
NEUTRAL OV1(3)
is the
PHASE VT SECONDARY
setting applies only if
GE Multilin
,