ABB ret650, Applications Manual

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• SYNCH signal on the MUx function block indicates that protection functions
are blocked due to loss of internal time synchronization to the IED (that is loss
of the hardware
synchSrc ).
• MUSYNCH signal on the MUx function block monitors the synchronization
flag
smpSynch in the datastream and IED hardware time synchronization.
No time synchronization
This example is not valid when GPS time is used for differential
protection or when PTP is enabled.
IEC/UCA 61850-9-2LE
Data
MU
IED
IEC10000075=2=en=Original.vsd
IEC10000075 V2 EN-US
Figure 118: Setting example without time synchronization
It is also possible to use IEC/UCA 61850-9-2LE communication without time
synchronization.
Settings on the local HMI under Main menu/Configuration/Time/
Synchronization/TIMESYNCHGEN:1/IEC61850-9-2 :
• HwSyncSrc : set to Off
• SyncLostMode : set to No block to indicate that protection functions are not
blocked
• SyncAccLevel : set to unspecified
Two status monitoring signals with no time synchronization:
1MRK 504 169-UEN A
Section 16
Station communication
Transformer protection RET650 2.2 IEC 321
Application manual