Setting Guidelines; System Time; Synchronization - ABB RELION 650 Series Applications Manual

Section 20
Basic IED functions
For time synchronization of line differential protection RED670 with diff communication in
GPS-mode, a GPS-based time synchronization is needed. This can be optical IRIG-B with 1344
from an external GPS-clock or an internal GPS-receiver.
For time synchronization of line differential protection with diff communication in GPS-mode,
a GPS-based time synchronization is needed. This can be optical IRIG-B with 1344 from an
external GPS-clock.
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.
20.13.2

Setting guidelines

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

Synchronization.

20.13.2.1

System time

The time is set with years, month, day, hour, minute, second and millisecond.
20.13.2.2 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:
• Off
SPA
•
LON
•
BIN (Binary Minute Pulse)
•
SNTP
•
IRIG-B
•
PPS
•
CoarseSyncSrc which can have the following values:
352
1MRK 505 363-UEN A
IP15089-1 v3
M11348-119 v5
M11348-143 v4
M11348-167 v18
Application manual