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1MRK 505 370-UEN D
17.3.2.1
Specific settings related to the IEC/UCA 61850-9-2LE communication
The process bus communication IEC/UCA 61850-9-2LE has specific settings, similar to the
analog inputs modules.
If there are more than one sample group involved, time synch is mandatory. If there is no time
synchronization, the protection functions will be blocked due to condition blocking.
CTStarPointx : These parameters specify the direction to or from object. See also section
"Setting of current
SyncLostMode : If this parameter is set to Block and the IED hardware time synchronization is
lost or the synchronization to the MU time is lost, the protection functions in the list
blocked due to conditional blocking. If this parameter is set to
protection functions in list
the synchronization of the MU time is lost or the IED has lost global common synchronization
(i.e. GPS, IRIG-B or PTP).
MUSYNCH output will be set if either of MU or IED hardware time synchronization is lost.
17.3.2.2
Loss of communication when used with LDCM
If IEC/UCA 61850-9-2LE communication is lost, see examples in figures 212,
protection functions in table
Case 1:
local
IED
MU
IEC13000298 V2 EN-US
Figure 212: Normal operation
Case 2:
Failure of the MU (sample lost) blocks the sending of binary signals through LDCM. The
received binary signals are not blocked and processd normally.
→DTT from the remote end is still processed.
Busbar protection REB670
Application manual
channels".
54
are blocked if the IED hardware time synchronization is lost or
SYNCH output will be set if IED hardware time synchronization is lost.
54
are blocked as per graceful degradation.
Direct transfer trip (DTT)
OK
OK
BlockOnLostUTC , the
remote
IED
IEC13000298-2-en.vsd
Section 17
Station communication
SEMOD166590-24 v6
54
will be
GUID-29EFBCB7-2B4F-4AA1-B593-8E89838722E0 v5
213
and 214, the
399
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