GE D30 Instruction Manual page 347
Line distance protection system
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CHAPTER 5: SETTINGS
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
5.7.11.4 Neutral overvoltage (ANSI 59N, IEC PTOV)
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS NEUTRAL OV1(3)
NEUTRAL OV1
There are three neutral overvoltage elements available. The neutral overvoltage element can be used to detect
asymmetrical 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 voltage channels entered under
is the p.u. base used when setting the pickup level.
VT SECONDARY
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
setting is "Definite time." The source assigned to this element must be configured for a phase VT.
NEUTRAL OV1 CURVE
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-119: Phase overvoltage logic
SETTINGS
PHASE OV1 PICKUP
SETTING
DELAY:
PHASE OV1
PHASE OV1 RESET
PICKUP:
DELAY:
t PKP
RUN
≥
VAB PICKUP
RUN
t PKP
≥
VBC
PICKUP
RUN
≥
VCA PICKUP
t PKP
NEUTRAL OV1
FUNCTION: Disabled
NEUTRAL OV1 SIGNAL
SOURCE: SRC 1
NEUTRAL OV1 PICKUP:
0.300 pu
NEUTRAL OV1 CURVE:
Definite time
NEUTRAL OV1 PICKUP:
DELAY: 1.00 s
NEUTRAL OV1 RESET:
DELAY: 1.00 s
NEUTRAL OV1 BLOCK:
Off
NEUTRAL OV1 TARGET:
Self-reset
NEUTRAL OV1 EVENTS:
Disabled
SETTINGS SYSTEM SETUP AC INPUTS VOLTAGE BANK PHASE
t RST
t RST
t RST
V
>
Range: Disabled, Enabled
Range: SRC 1, SRC 2
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
NEUTRAL OV1 PICKUP DELAY
GROUPED ELEMENTS
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
3 Pickup
×
for V
, V
,
AB
BC
setting applies only if the
5-215
5
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