ABB Relion 650 Series Applications Manual page 232

Section 15
Basic IED functions
The time synchronization fine tunes the clock.
IEC 60870-5-103 time synchronization
An IED with IEC 60870-5-103 protocol can be used for time synchronization, but for accuracy
reasons, it is not recommended. In some cases, however, this kind of synchronization is needed,
for example, when no other synchronization is available.
First, set the IED to be synchronized via IEC 60870-5-103 either from IED Configuration/Time/
Synchronization/TIMESYNCHGEN:1 in PST or from the local HMI.
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Figure 113: Settings under TIMESYNCHGEN:1 in PST
CoarseSyncSrc can be set to IEC 60870-5-103, not FineSyncSource .
Only
After setting up the time synchronization source, the user must check and modify the IEC
60870-5-103 time synchronization specific settings, under Main menu/Configuration/
Communication/Station communication/IEC60870-5-103.
• MasterTimeDomain specifies the format of the time sent by the master. Format can be:
•
•
•
TimeSyncMode specifies the time sent by the IED. The time synchronisation is done using the
•
following ways:
•
•
•
EvalTimeAccuracy evaluates time accuracy for invalid time. Specifies the accuracy of the
•
synchronization (5, 10, 20 or 40 ms). If the accuracy is less than the specified value, the "Bad
Time" flag is raised. To accommodate those masters that are really bad in time sync, the
EvalTimeAccuracy can be set to Disabled .
According to the standard, the "Bad Time" flag is reported when synchronization has been
omitted in the protection for >23 h.
226
Coordinated Universal Time (
Local time set in the master (
Local time set in the master adjusted according to daylight saving time (
IEDTime : The IED sends the messages with its own time.
LinMasTime : The IED measures the offset between its own time and the master time,
and applies the same offset for the messages sent as in the
LinMasTime it applies the time changes occurred between two synchronised messages.
IEDTimeSkew : The IED measures the offset in between its own time and the master time
and applies the same offset for the messages sent.
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Local )
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Busbar protection REB650
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