Setting Guidelines; System Time; Synchronization - ABB RELION 670 Series Applications Manual

Section 22
Basic IED functions
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.
22.13.2

Setting guidelines

All the parameters related to time are divided into two categories: System time and

Synchronization.

22.13.2.1

System time

The time is set with years, month, day, hour, minute, second and millisecond.
22.13.2.2 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
TimeSynch . The time synchronization source can also be set from PCM600. The setting
called
alternatives are:
FineSyncSource can have the following values:
Off
•
SPA
•
LON
•
BIN (Binary Minute Pulse)
•
• GPS
GPS+SPA
•
GPS+LON
•
GPS+BIN
•
SNTP
•
GPS+SNTP
•
IRIG-B
•
GPS+IRIG-B
•
PPS
•
CoarseSyncSrc which can have the following values:
714
1MRK 504 152-UEN B
IP15089-1 v3
M11348-119 v4
M11348-143 v4
M11348-167 v18
Application manual