Technical Data; Parameter Setting Group Handling; Functionality - Hitachi Relion 650 Series Technical Manual

1MRK 511 557-UEN Rev. A
coarse synch is in combination with PPS as fine source. The combination SNTP as both fine and
coarse source shall not be used.
SNTP server requirements
The SNTP server to be used is connected to the local network, that is not more than 4-5 switches or
routers away from the IED. The SNTP server is dedicated for its task, or at least equipped with a
real-time operating system, that is not a PC with SNTP server software. The SNTP server should be
stable, that is, either synchronized from a stable source like GPS, or local without synchronization.
Using a local SNTP server without synchronization as primary or secondary server in a redundant
configuration is not recommended.
Synchronization via IRIG-B
IRIG-B is a protocol used only for time synchronization. A clock can provide local time of the year in
this format. The "B" in IRIG-B states that 100 bits per second are transmitted, and the message is
sent every second. After IRIG-B there numbers stating if and how the signal is modulated and the
information transmitted.
To receive IRIG-B there are one dedicated connector for the IRIG-B port. IRIG-B 00x messages can
be supplied via the galvanic interface, where x (in 00x) means a number in the range of 1-7.
If the x in 00x is 4, 5, 6 or 7, the time message from IRIG-B contains information of the year. If x is 0,
1, 2 or 3, the information contains only the time within the year, and year information has to come
from the tool or local HMI.
The IRIG-B input also takes care of IEEE1344 messages that are sent by IRIG-B clocks, as IRIG-B
previously did not have any year information. IEEE1344 is compatible with IRIG-B and contains year
information and information of the time-zone.
It is recommended to use IEEE 1344 for supplying time information to the IRIG-B module. In this
case, send also the local time in the messages.
Synchronization via process bus IEC 61850-9-2LE
An optical PPS signal can be used for the time synchronisation of the process bus communication
(IEC 61850-9-2LE protocol). This signal should emanate either from the external GPS clock or from
the merging unit.
14.2.9

Technical data

Table 341: Time synchronization, time tagging
Function
Time tagging resolution, events
Time tagging resolution, waveform records
Time tagging error with SNTP synchronization
Time tagging error with IRIG-B synchronization
14.3

Parameter setting group handling

14.3.1

Functionality

Use the four different groups of settings to optimize the IED operation for different power system
conditions. Creating and switching between fine-tuned setting sets, either from the local HMI or
configurable binary inputs, results in a highly adaptable IED that can be applied to a variety of power
system scenarios.
Technical Manual
© 2021 Hitachi Energy. All rights reserved.
Section 14
Basic IED functions
D0E6710T201305151403 v1
D0E6636T201305151403 v1
GUID-684E5B3A-AF6B-4BDC-966A-BB5B3AAC4280 v1
D0E6633T201305151403 v1
D0E7191T201305151403 v1
Value
1 ms
0.25 ms (50 Hz) / 0.208 ms
(60 Hz)
±1.0 ms max.
±0.1 ms max.
M12006-6 v8
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