ABB Relion 670 Series Applications Manual page 507

1MRK 511 358-UUS A
• IRIG-B
• SPA
• LON
• PPS
For IEDs using IEC 61850-9-2LE in "mixed mode" a time synchronization from an external clock is
recommended to the IED and all connected merging units. The time synchronization from the
clock to the IED can be either optical PPS or IRIG-B. For IED's using IEC 61850-9-2LE from one
single MU as analog data source, the MU and IED still needs to be synchronized to each other. This
could be done by letting the MU supply a PPS signal to the IED.
Out of these, LON and SPA contains two types of synchronization messages:
• Coarse time messages are sent every minute and contain complete date and time, that is
year, month, day, hour, minute, second and millisecond.
• Fine time messages are sent every second and comprise only seconds and milliseconds.
The selection of the time source is done via the corresponding setting.
It is possible to set a backup time-source for GPS signal, for instance SNTP. In this case, when the
GPS signal quality is bad, the IED will automatically choose SNTP as the time-source. At a given
point in time, only one time-source will be used.
21.13.2 Setting guidelines
All the parameters related to time are divided into two categories: System time and
Synchronization.
21.13.2.1 System time
The time is set with years, month, day, hour, minute, second and millisecond.
21.13.2.2 Synchronization
The setting parameters for the real-time clock with external time synchronization are set via local
HMI or PCM600. The path for Time Synchronization parameters on local HMI is Main menu/
Configuration/Time/Synchronization. The parameters are categorized as Time Synchronization
(TIMESYNCHGEN) and IRIG-B settings (IRIG-B:1) in case that IRIG-B is used as the external time
synchronization source.
TimeSynch
When the source of the time synchronization is selected on the local HMI, the parameter is called
TimeSynch . The time synchronization source can also be set from PCM600. The setting
alternatives are:
FineSyncSource can have the following values:
Disabled
•
• SPA
LON
•
BIN (Binary Minute Pulse)
•
GPS
•
• GPS+SPA
Application manual
Section 21
Basic IED functions
IP15089-1 v3
M11348-119 v4
M11348-143 v4
M11348-167 v18
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