Hitachi Relion 670 Series Applications Manual page 291

1MRK511407-UUS Rev. N
• 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 external clock for time synchronization
IEC/UCA 61850-9-2LE
IEC17000093 V1 EN-US
Figure 118:
Settings on the local HMI under Main menu/Configuration/Time/Synchronization/TIMESYNCHGEN:1/
IEC61850-9-2:
• 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.
• fineSyncSource: should be set to IRIG-B if available from the clock.
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 (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
Phasor measurement unit RES670
Application manual
This example is not valid when GPS time is used for differential protection, when PTP is
enabled or when the PMU report is used.
IRIG-B
IED
data
PPS
MU
Setting example with external synchronization
This example is not valid when GPS time is used for differential protection, when PTP is
enabled or when the PMU report is used.
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STATION
CLOCK
IEC17000093-1-en-us.vsd
Section 19
Station communication
285