5-122
F60 Feeder Protection System
GE Multilin
5.5 GROUPED ELEMENTS
5 SETTINGS
5
d) NEUTRAL DIRECTIONAL OVERCURRENT
(ANSI 67N)
PATH: SETTINGS
ÖØ
GROUPED ELEMENTS
Ö
SETTING GROUP 1(6)
Ö
NEUTRAL CURRENT
ÖØ
NEUTRAL DIRECTIONAL OC1(2)
There are two neutral directional overcurrent protection elements available. The element provides both forward and reverse
fault direction indications the
NEUTRAL DIR OC1 FWD
and
NEUTRAL DIR OC1 REV
operands, respectively. The output oper-
and is asserted if the magnitude of the operating current is above a pickup level (overcurrent unit) and the fault direction is
seen as
forward
or
reverse
, respectively (directional unit).
The
overcurrent unit
responds to the magnitude of a fundamental frequency phasor of the either the neutral current calcu-
lated from the phase currents or the ground current. There are separate pickup settings for the forward-looking and
reverse-looking functions. If set to use the calculated 3I_0, the element applies a
positive-sequence restraint
for better per-
formance: a small user-programmable portion of the positive-sequence current magnitude is subtracted from the zero-
sequence current magnitude when forming the operating quantity.
(EQ 5.17)
The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious zero-sequence currents
resulting from:
•
System unbalances under heavy load conditions.
NEUTRAL
DIRECTIONAL OC1
NEUTRAL DIR OC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEUTRAL DIR OC1
SOURCE: SRC 1
Range: SRC 1, SRC 2
MESSAGE
NEUTRAL DIR OC1
POLARIZING: Voltage
Range: Voltage, Current, Dual
MESSAGE
NEUTRAL DIR OC1 POL
VOLT: Calculated V0
Range: Calculated V0, Measured VX
MESSAGE
NEUTRAL DIR OC1 OP
CURR: Calculated 3I0
Range: Calculated 3I0, Measured IG
MESSAGE
NEUTRAL DIR OC1 POS-
SEQ RESTRAINT: 0.063
Range: 0.000 to 0.500 in steps of 0.001
MESSAGE
NEUTRAL DIR OC1
OFFSET: 0.00
Ω
Range: 0.00 to 250.00
Ω
in steps of 0.01
MESSAGE
NEUTRAL DIR OC1 FWD
ECA: 75° Lag
Range: –90 to 90° in steps of 1
MESSAGE
NEUTRAL DIR OC1 FWD
LIMIT ANGLE: 90°
Range: 40 to 90° in steps of 1
MESSAGE
NEUTRAL DIR OC1 FWD
PICKUP: 0.050 pu
Range: 0.002 to 30.000 pu in steps of 0.001
MESSAGE
NEUTRAL DIR OC1 REV
LIMIT ANGLE: 90°
Range: 40 to 90° in steps of 1
MESSAGE
NEUTRAL DIR OC1 REV
PICKUP: 0.050 pu
Range: 0.002 to 30.000 pu in steps of 0.001
MESSAGE
NEUTRAL DIR OC1 BLK:
Off
Range: FlexLogic™ operand
MESSAGE
NEUTRAL DIR OC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
NEUTRAL DIR OC1
EVENTS: Disabled
Range: Disabled, Enabled
I
op
3
I_0
K
I_1
×
–
(
)
×
=
Summary of Contents for F60 UR Series
Page 2: ......
Page 4: ......
Page 30: ...1 20 F60 Feeder Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 48: ...2 18 F60 Feeder Protection System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 126: ...4 30 F60 Feeder Protection System GE Multilin 4 2 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 354: ...5 228 F60 Feeder Protection System GE Multilin 5 9 TESTING 5 SETTINGS 5 ...
Page 382: ...6 28 F60 Feeder Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 398: ...8 8 F60 Feeder Protection System GE Multilin 8 2 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 414: ...A 14 F60 Feeder Protection System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 492: ...B 78 F60 Feeder Protection System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 530: ...D 10 F60 Feeder Protection System GE Multilin D 1 IEC 60870 5 104 APPENDIXD D ...
Page 542: ...E 12 F60 Feeder Protection System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 558: ...x F60 Feeder Protection System GE Multilin INDEX ...