GE Multilin
F35 Multiple Feeder Protection System
5-111
5 SETTINGS
5.5 GROUPED ELEMENTS
5
5.5.4 NEUTRAL CURRENT
a) NEUTRAL TIME OVERCURRENT
(ANSI 51N)
PATH: SETTINGS
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GROUPED ELEMENTS
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SETTING GROUP 1(6)
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NEUTRAL CURRENT
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NEUTRAL TOC1(6)
The neutral time overcurrent element can provide a desired time-delay operating characteristic versus the applied current
or be used as a simple definite time element. The neutral current input value is a quantity calculated as 3Io from the phase
currents and may be programmed as fundamental phasor magnitude or total waveform RMS magnitude as required by the
application.
Two methods of resetting operation are available: “Timed” and “Instantaneous” (refer to the
Inverse time overcurrent curve
characteristics
section for details on curve setup, trip times and reset operation). When the element is blocked, the time
accumulator will reset according to the reset characteristic. For example, if the element reset characteristic is set to “Instan-
taneous” and the element is blocked, the time accumulator will be cleared immediately.
Figure 5–49: NEUTRAL TIME OVERCURRENT 1 SCHEME LOGIC
NEUTRAL TOC1
NEUTRAL TOC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEUTRAL TOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
MESSAGE
NEUTRAL TOC1
INPUT: Phasor
Range: Phasor, RMS
MESSAGE
NEUTRAL TOC1
PICKUP: 1.000
pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
NEUTRAL TOC1
CURVE: IEEE Mod Inv
Range: See OVERCURRENT CURVE TYPES table
MESSAGE
NEUTRAL TOC1
TD MULTIPLIER: 1.00
Range: 0.00 to 600.00 in steps of 0.01
MESSAGE
NEUTRAL TOC1
RESET: Instantaneous
Range: Instantaneous, Timed
MESSAGE
NEUTRAL TOC1 BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
NEUTRAL TOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
NEUTRAL TOC1
EVENTS: Disabled
Range: Disabled, Enabled
SETTING
NEUTRAL TOC1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
NEUTRAL TOC1
SOURCE:
IN
NEUTRAL TOC1
BLOCK:
Off = 0
NEUTRAL TOC1
CURVE:
NEUTRAL TOC1
TD MULTIPLIER:
NEUTRAL TOC 1
RESET:
SETTINGS
SETTING
IN
≥
PICKUP
I
t
NEUTRAL TOC1
PICKUP:
RUN
827034A3.VSD
FLEXLOGIC OPERANDS
NEUTRAL TOC1 DPO
NEUTRAL TOC1 OP
NEUTRAL TOC1
INPUT:
AND
NEUTRAL TOC1 PKP
Summary of Contents for F35
Page 2: ......
Page 4: ......
Page 296: ...5 174 F35 Multiple Feeder Protection System GE Multilin 5 9 TESTING 5 SETTINGS 5 ...
Page 328: ...7 8 F35 Multiple Feeder Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 350: ...A 16 F35 Multiple Feeder Protection System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 422: ...B 72 F35 Multiple Feeder Protection System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 472: ...E 12 F35 Multiple Feeder Protection System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...