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.
Содержание L60
Страница 10: ...x L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Страница 57: ...GE Multilin L60 Line Phase Comparison System 2 27 2 PRODUCT DESCRIPTION 2 3 SPECIFICATIONS 2 ...
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Страница 100: ...3 42 L60 Line Phase Comparison System GE Multilin 3 3 DIRECT INPUT AND OUTPUT COMMUNICATIONS 3 HARDWARE 3 ...
Страница 482: ...6 26 L60 Line Phase Comparison System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 554: ...10 8 L60 Line Phase Comparison System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Страница 674: ...B 110 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 704: ...C 30 L60 Line Phase Comparison System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 720: ...E 10 L60 Line Phase Comparison System GE Multilin E 1 PROTOCOL APPENDIX E E ...
Страница 732: ...F 12 L60 Line Phase Comparison System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 742: ...H 8 L60 Line Phase Comparison System GE Multilin H 3 WARRANTY APPENDIX H H ...