![background image](http://html1.mh-extra.com/html/abb/relion-670-series/relion-670-series_applications-manual_3052129738.webp)
and the IED needs to get the time-quality information in IRIG-B, using the 1344 protocol, from
the very same clock in order to be able to block in case of failure in the clock source.
The settings for time synchronization should be
CourseSyncSrc = Off, FineSyncSource = IRIG-B,
TimeAdjustRate = Fast. The setting for Encoding in SYNCHIRIG-B needs to be set to 1344.
PPS in
IRIG -B
GTM
LDCM
diffSync
GPS
3xI
3xI
TRM
GPS
GPS
IED
Satellite-Controlled Clock
Merging unit
(MU)
IED
IEC61850-
9-2LE
en08000085.vsd
IEC08000085 V1 EN-US
Figure 429: Time synchronization of merging unit and IED
The parameter
DiffSync for the LDCM needs to be set to GPS and the GPSSyncErr needs to be
set to
Block.
In "ECHO" mode MU and IED still need to be synchronized. In this case they can be
synchronized with either PPS or IRIG-B.
Section 22
1MRK 505 343-UEN B
Basic IED functions
732
Application manual
Summary of Contents for Relion 670 series
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