ABB Relion REQ650, Applications Manual, Page: 305 / 340

time base for the IEDs in a protection and control system. This makes comparison and
analysis of events and disturbance data between all IEDs in the power system possible.
Time-tagging of internal events and disturbances are an excellent help when
evaluating faults. Without time synchronization, only the events within the IED can
be compared to one another. With time synchronization, events and disturbances
within the entire station, and even between line ends, can be compared during
evaluation.
In the IED, the internal time can be synchronized from a number of sources:
• SNTP
• IRIG-B
• DNP
• IEC60870-5-103
Micro SCADA OPC server should not be used as a time
synchronization source.
15.2.3 Setting guidelines
System time
The time is only possible to set inside the IED via the local HMI by navigating to
Configuration/Time/SYSTEMTIME with year, month, day, hour, minute and
second.
Synchronization
With external time synchronization the setting how to synchronize for the real-time
clock (TIME) are set via local HMI or PCM600.
TimeSynch
The setting TIMESYNCGEN is used to set the source of the time synchronization. The
setting alternatives are:
CoarseSyncSrc which can have the following values:
• Off
• SNTP
• DNP
• IEC60870-5-103
FineSyncSource which can have the following values:
1MRK 505 291-UEN A
Section 15
Basic IED functions
299
Application manual