8-30
L60 Line Phase Comparison System
GE Multilin
8.1 OVERVIEW
8 THEORY OF OPERATION
8
Figure 8–25: PULSE ASYMMETRY, PHENOMENON AND CORRECTION
(CHANNEL DELAY NOT SHOWN FOR SIMPLICITY)
The following figure illustrates the alignment algorithm. The figure shows local current, received RX voltage, and the remote
pulse aligned with the local pulses accounting for the channel delay setting.
Figure 8–26: ALIGNMENT LOGIC (RELAY COMTRADE RECORD)
Being communication-dependent, a phase comparison relay should treat information delivered from the remote terminals
with the same criticality as the local AC currents. This includes monitoring for troubleshooting purposes, accountability, and
continuous improvement capability for products and installations. Modern microprocessor-based phase comparison relays
831806A1.CDR
TIME
SENT
RECEIVED
ADJUSTED
dt
dt
CORRECTING EXTENDED MARKS - ASYMMETRY SETTING NEGATIVE
TIME
SENT
RECEIVED
ADJUSTED
dt
dt
CORRECTING EXTENDED SPACES - ASYMMETRY SETTING POSITIVE
831807A1.CDR
F1-IA
F2-IB
F3-IC
87PC BKR1 CURRENT
POS ALIGNED
RX1P VOLTAGE
RX1P ALIGNED
3) Internal AG fault
= coincidence
5) No fault
4) Internal BG fault
= no coincidence
1) Local composite current
converted into POS pulses
2) Received DC voltage
converted into RX pulses
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 ...