ABB RED650 Technical Manual page 682

Section 18
Station communication
676
• NO[0] indicates that normal data is received and are accepted
• YES[1] indicates that the received datastream is tagged as simulated and
are accepted
Internal substitution can happen during the following conditions:
1. Transient block after receive error (sample loss)
2. Transient block after Simulated/Real Sample value stream transition
3. Transient block after recovery from substitution
4. No data from merging unit
5. Bad data from merging unit
6. Merging unit report lost sync[smpSynch=0] and SyncLostMode = Block/
BlockOnLostUTC
7. IED time quality of hardware is not good [not within set value SyncAccLevel]
and SyncLostMode = Block/BlockOnLostUTC
8. Merging unit channel reported with quality other than good
9. Merging unit channel/channels is/are in testmode and the IED is not in
testmode
During Internal substitution, the functions connected to that particular merging unit
will be blocked and the merging unit channel's analog values will be forced to 0
with quality as Invalid, Substituted, Failure.
Timeout
TSYNCERR Indicates that there is some timeout on any configured time source or
the time quality is worse than specified in SynchAccLevel. The timeout is
individually specified per time source (PPS, IRIG-B, SNTP etc.) See section
synchronization TIMESYNCHGEN"
Blocking condition
Blocking of protection functions is indicated by (SMPLLOST is high) or
(MUDATA is high)
SyncLostMode is not required to set as Block/BlockonLostUTC when differential
protection based on ECHO mode. A missing PPS however will lead to a drift
between MU and IED. Therefore protection functions in this case will be blocked.
Functions can be blocked by loss of analog data, for example if a IEC/UCA
61850-9-2LE source malfunctions. Figure
malfunctions, and all function blocks connected to that 3-phase group get blocked
as a result, this is also known as conditional blocking functionality.
1MRK 505 394-UEN A
GUID-37C7609A-D9CD-435F-BBEE-7518B88BEEDF v1
328 shows an example where MU1
Line differential protection RED650 2.2 IEC
"Time
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