GE Multilin
L60 Line Phase Comparison System
5-115
5 SETTINGS
5.5 GROUPED ELEMENTS
5
c) ADVANCED FAULT DETECTORS MAIN MENU
PATH: SETTINGS
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GROUPED ELEMENTS
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PHASE COMPARISON ELEMENTS
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ADVANCED FAULT DETECTORS
Five advanced fault detectors are provided.
The negative-sequence voltage element responds to the
I
×
Z
–
V
term for negative-sequence voltage and current and is
meant to detect faults under weak system conditions.
The negative-sequence current rate of change element responds to the increment in the magnitude of the negative-
sequence current over a half-a-cycle moving data window, and is meant to detect faults under load unbalance such as on
untransposed high voltage transmission lines or in a vicinity of electrical traction systems causing significant negative-
sequence current unbalance.
The positive-sequence current rate of change element responds to the increment in the magnitude of the positive-
sequence current over a half-a-cycle moving data window, and is meant to detect three-phase balance faults under high
load conditions.
The negative-sequence current overcurrent element responds to the increment of the negative-sequence current above
threshold.
The positive-sequence current overcurrent element responds to the increment of the positive-sequence current above
threshold.
All advanced fault detectors operate independently from each other, and independently from the mixed signal overcurrent
FDL and FDH comparators embedded in the 87PC function. Each detector supports the low and high setting levels to facil-
itate starting and supervise tripping. When enabled, a given detector is automatically used to control the 87PC function.
Effectively all detectors are ORed before they are routed to the 87PC element.
The overcurrent fault detectors respond to the effective operating current of the 87PC function, which includes charging
current compensation. The advanced fault detectors respond to their operating signals irrespective of the configured 87PC
current.
d) NEGATIVE-SEQUENCE VOLTAGE FAULT DETECTION
PATH: SETTINGS
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GROUPED...
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PHASE COMPARISON...
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ADVANCED FAULT DETECTORS
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NEGATIVE SEQUENCE VOLTAGE
ADVANCED
FAULT DETECTORS
NEGATIVE-SEQUENCE
VOLTAGE
MESSAGE
RATE OF CHANGE OF
NEG SEQ CURRENT
MESSAGE
RATE OF CHANGE OF
POS SEQ CURRENT
MESSAGE
NEGATIVE SEQUENCE
CURRENT
MESSAGE
POSITIVE SEQUENCE
CURRENT
NEGATIVE SEQUENCE
VOLTAGE
NEG SEQ VOL FD
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEG SEQ VOL FD
IMPEDANCE: 10.0%
Range: 0.0 to 100% in steps of 0.1
MESSAGE
NEG SEQ VOL FDL
PICKUP: 0.010 pu
Range: 0.005 to 3.000 pu in steps of 0.001
MESSAGE
NEG SEQ VOL FDH
PICKUP: 0.050 pu
Range: 0.005 to 3.000 pu in steps of 0.001
MESSAGE
NEG SEQ VOL FD BLK:
Off
Range: any FlexLogic™ operand
Summary of Contents for UR series
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Page 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Page 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Page 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...