ABB RES670 Applications Manual page 357

1MRK 511 407-UEN C
Phasor measurement unit RES670 2.2 IEC
Application manual
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 NoBlock, Block, and
BlockOnLostUTC. If the parameter is set to Block or BlockOnLostUTC, then if the
time quality is worse than the limit set by 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 "Unspecified", the time quality will be
always accepted and application functions will not be blocked due to the time
quality.
IRIG-B
The IRIG-B parameters have to be set according to the external clock providing the
IRIG-B signal to the IED. The IRIG-B parameters (IRIG-B:1) are as follows:
• SynchType
• TimeDomain
• Encoding
• TimeZoneAs1344
SynchType: This parameter is used to select the type of IRIG-B synchronization.
The options are "BNC" or "Opto". The IRIG-B module has two inputs. One input
is for the electrical IRIG-B (BNC connector) that can handle both a pulse-width
modulated signal (also called unmodulated) and an amplitude modulated signal
(also called sine wave modulated). The other is an optical input type ST for optical
pulse-width modulated signal (IRIG-B 00X). The recommended IRIG-B signal for
PMU time synchronization is IRIG-B optical (IRIG-B 00X) with IEEE1344
support. If the optical IRIG-B signal is used, this parameter shall be set as "Opto",
and If electrical IRIG-B signal is used (not recommended) this shall be set as
"BNC". More information regarding IRIG-B module is available in Technical
Manual under section IED Hardware.
TimeDomain: This parameter shall be also set according to the external clock used.
The options are "LocalTime" or "UTC".
Encoding: This parameter shall be set according to the type of encoding on the
IRIG-B signal provided by the external clock. The options are "IRIG-B", "1344",
or "1344TZ". The IRIG-B signal used for synchrophasor application has to support
Section 22
Basic IED functions
GUID-822F8DCC-7110-49EC-BA87-9F930721D180 v1
351