Two status monitoring signals can be:
• SYNCH signal on the MUx function block indicates that protection functions
are blocked due to loss of internal time synchronization to the IED
• MUSYNCH signal on the MUx function block monitors the synchronization
flag smpSynch in the datastream and IED hardware time synchronization.
Using MU for time synchronization via PPS
This example is not valid when GPS time is used for differential
protection or when PTP is enabled.
IED
MU
Analog data
PPS
IEC/UCA 61850-9-2LE
Synchronization
IEC10000061=2=en=Original.vsd
IEC10000061 V2 EN-US
Figure 156: Setting example when MU is the synchronizing source
Settings on the local HMI under Main menu/Configuration/Time/
Synchronization/TIMESYNCHGEN:1/IEC61850-9-2:
• HwSyncSrc: set to PPS as generated by the MU (ABB MU)
• SyncLostMode : set to Block to block protection functions if time
synchronization is lost
• SyncAccLevel: can be set to 4μs since this corresponds to a maximum phase
angle error of 0.072 degrees at 50Hz
Settings on the local HMI under Main menu/Configuration/Time/
Synchronization/TIMESYNCHGEN:1/General:
• fineSyncSource can be set to something different to correlate events and data to
other IEDs in the station.
Two status monitoring signals can be:
1MRK 505 393-UEN B Section 18
Station communication
Line differential protection RED650 2.2 IEC 375
Application manual
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