ABB RED650, Applications Manual

Page: 423 / 454

21.11.2 Setting guidelines
M15260-3 v7
Remember always that there are two possible ways to place the IED in the
TestMode = On ” state. If, the IED is set to normal operation ( TestMode = Off ), but
the functions are still shown being in the test mode, the input signal IED_TEST on
the TESTMODE function block is activated in the configuration.
Forcing of binary input and output signals is only possible when the IED is in IED
test mode.
21.12 Time synchronization TIMESYNCHGEN
IP1750-1 v2
21.12.1 Application
M11345-3 v11
Use time synchronization to achieve a common time base for the IEDs in a
protection and control system. This makes it possible to compare events and
disturbance data between all IEDs in the system.
Time-tagging of internal events and disturbances are an excellent help when
evaluating faults. Without time synchronization, only the events within one IED
can be compared with each other. With time synchronization, events and
disturbances within the whole network, can be compared and evaluated.
In the IED, the internal time can be synchronized from the following sources:
• BIN (Binary Minute Pulse)
• DNP
• IEC103
• SNTP
• IRIG-B
• SPA
• LON
• PPS
• IEEE 1588 (PTP)
For time synchronization of line differential protection with diff communication in
GPS-mode, a GPS-based time synchronization is needed. This can be optical IRIG-
B with 1344 from an external GPS-clock.
Out of these, LON and SPA contains two types of synchronization messages:
• Coarse time messages are sent every minute and contain complete date and
time, that is year, month, day, hour, minute, second and millisecond.
• Fine time messages are sent every second and comprise only seconds and
milliseconds.
The selection of the time source is done via the corresponding setting.
1MRK 505 393-UEN B
Section 21
Basic IED functions
Line differential protection RED650 2.2 IEC 417
Application manual