ABB Relion 670 Series Applications Manual page 341

1MRK 511 407-UUS Rev. J
is enabled on the IEDs and the switches that connect the station are compatible with IEEE 1588,
the station will become synchronized to one common time with an accuracy of under 1us. Using an
IED as a boundary clock between several networks will keep 1us accuracy on three levels or when
using an HSR, 15 IEDs can be connected in a ring without losing a single microsecond in accuracy.
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 system time can be set manually via the local HMI under Main menu/Configuration/Time/
System time. The time is set with years, month, day, hour, minute, second and millisecond. In
addition, there are also settings for Day-Light-Saving and adjustment of Time-Zones.
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.
Time Synchronization
The time synchronization (TIMESYNCHGEN) parameters are divided in two categories, "general"
and "IEC61850-9-2" parameters.
The general parameters are as follows:
FineSynchSource
•
SynchMaster
•
FineSynchSource : This parameter is used to select the time synchronization source. The options
are "Off", "GPS", "IRIG-B", or "GPS+IRIG-B". In case that both GPS and IRIG-B are used (GPS+IRIG-B)
for redundant time synchronization, the PMU will automatically select the most accurate time
synchronization source.
SynchMaster : This parameter defines if the IED shall be used as a master clock (SNTP Server) for
time synchronization within a Substation Automation System for IEDs connected on a
communication network (IEC61850-8-1). The options are "Off" or "SNTP-Server".
The IEC61850-9-2 parameters are as follows:
SyncLostMode
•
• SynchAccLevel
SyncLostMode : This parameter defines the time synchronization mode when using process bus
applications (IEC61850-9-2). The options are
parameter is set to
SyncAccLevel, some functions will be blocked in the IED.
SyncAccLevel : This parameter is to define the required time synchronization accuracy for process
bus applications. The options are "Class T5 (1µs)", "Class T4 (4µs)", or "Unspecified". If it is set to
Phasor measurement unit RES670
Application manual
Block or BlockOnLostUTC , then if the time quality is worse than the limit set by
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NoBlock , Block , and BlockOnLostUTC . If the
Section 22
Basic IED functions
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