GE Multilin
L60 Line Phase Comparison System
8-5
8 THEORY OF OPERATION
8.1 OVERVIEW
8
Figure 8–4: THREE-TERMINAL LINE PHASE COMPARISON
Figure 8–5: SINGLE-PHASE COMPARISON BLOCKING SCHEME PRINCIPLE
It will be noted from Figure 8–5 that AND1 (the comparer) at each end of the line compares the coincidence time of the pos-
itive half cycle of current with the absence of receiver output. This is initiated only when a fault is present as indicated by an
output from FDH (Fault Detector High-set). FDH is set so that it does not pick up on load current but does pick up for all
faults on the protected line section. Thus, when a fault occurs, FDH picks up, and if the receiver output is not present for 3
milliseconds during the positive half cycle of current out of the mixing network, a trip output will be obtained.
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Страница 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Страница 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 132: ...4 30 L60 Line Phase Comparison System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Страница 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Страница 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Страница 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Страница 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Страница 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Страница 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...