ABB Relion 670 Series Applications Manual page 342

Section 22
Basic IED functions
"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 IEEE 1344. IEEE 1344 can provide Time Zone offset
(TZ) as an additional information. Encoded IRIG-B time plus TZ (Time Zone) offset always equals
to UTC.
TimeZoneAs1344 : This parameter is used to specify the sign of Time Zone (TZ) offset as defined in
IEEE 1344 and according to the external clock. The options are "Plus TZ" or "Minus TZ". Encoded
IRIG-B time plus Time Zone offset always equals to UTC.
IEEE 1588 (PTP)
Precision Time Protocol (PTP) is enabled/disabled using the Ethernet configuration tool /ECT) in
PCM600.
PTP can be set to On , Off or Slave only . When set to Slave only the IED is connected to the PTP-
group and will synchronize to the grandmaster but cannot function as the grandmaster.
A PTP-group is set up by connecting the IEDs to a network and enabling PTP. To set one IED as the
grandmaster change Priority2 to 127 instead of the default 128.
IEC16000089 V1 EN-US
Figure 125: Enabling PTP in ECT
PTP VLAN tag must have the same value in station clock and in the IED. The default value is set
The
to 0.
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Phasor measurement unit RES670
Application manual