17.3.2.1 Specific settings related to the IEC/UCA 61850-9-2LE communication
SEMOD166590-24 v6
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 channels".
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 54 will be
blocked due to conditional blocking. If this parameter is set to
BlockOnLostUTC
, the
protection functions in list 54 are blocked if the IED hardware time synchronization is lost or
the synchronization of the MU time is lost or the IED has lost global common synchronization
(i.e. GPS, IRIG-B or PTP).
SYNCH
output will be set if IED hardware time synchronization is lost.
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
GUID-29EFBCB7-2B4F-4AA1-B593-8E89838722E0 v5
If IEC/UCA 61850-9-2LE communication is lost, see examples in figures 212, 213 and 214, the
protection functions in table 54 are blocked as per graceful degradation.
Case 1:
IEC13000298-2-en.vsd
IEDIED
MU
OK
OK
Direct transfer trip (DTT)
local remote
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.
1MRK 505 370-UEN D Section 17
Station communication
Busbar protection REB670 399
Application manual
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