Hitachi Relion 670 Series Applications Manual page 333

1MRK511407-UUS Rev. N
• 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 133:
The PTP VLAN tag must have the same value in station clock and in the IED. The default value is set to
0.
The PTP VLAN tag does not need to be the same on all access points in one IED. It is possible to mix as
long as they are the same for all devices on each subnet.
Phasor measurement unit RES670
Application manual
Enabling PTP in ECT
© 2017 - 2023 Hitachi Energy. All rights reserved
Section 22
Basic IED functions
GUID-424227EC-74A1-4628-8948-C1876840ABFE v3
IEC16000089-1-en.vsdx
327