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GE Multilin
L30 Line Current Differential System
2-13
2 PRODUCT DESCRIPTION
2.2 PILOT CHANNEL RELAYING
2
The master L30 relay performs the following functions:
•
Performs all functions of a slave L30.
•
Receives current phasor information from all relays.
•
Performs the current differential algorithm.
•
Sends a current differential DTT signal to all L30 relays on the protected line.
In the peer-to-peer mode, all L30 relays act as masters.
Figure 2–2: COMMUNICATIONS PATHS
2.2.2 CHANNEL MONITOR
The L30 has logic to detect that the communications channel is deteriorating or has failed completely. This can provide an
alarm indication and disable the current differential protection. Note that a failure of the communications from the master to
a slave does not prevent the master from performing the current differential algorithm; failure of the communications from a
slave to the master will prevent the master from performing the correct current differential logic. Channel propagation delay
is being continuously measured and adjusted according to changes in the communications path. Every relay on the protec-
tion system can assigned an unique ID to prevent advertent loopbacks at multiplexed channels.
IED-1
IED-1
IED-2
IED-2
IED-3
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
Rx
Rx
Optional redundant channel
Typical two-terminal application
Typical three-terminal application
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
831009A5.CDR
Содержание L30
Страница 10: ...x L30 Line Current Differential System GE Multilin TABLE OF CONTENTS ...
Страница 30: ...1 20 L30 Line Current Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 58: ...2 28 L30 Line Current Differential System GE Multilin 2 4 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 126: ...4 30 L30 Line Current Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 370: ...5 244 L30 Line Current Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 396: ...6 26 L30 Line Current Differential System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 450: ...10 10 L30 Line Current Differential System GE Multilin 10 4 INSTANTANEOUS ELEMENTS 10 APPLICATION OF SETTINGS 10 ...
Страница 464: ...A 10 L30 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 600: ...C 30 L30 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 610: ...D 10 L30 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Страница 622: ...E 12 L30 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Страница 634: ...F 12 L30 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Страница 644: ...x L30 Line Current Differential System GE Multilin INDEX ...