Toshiba GR200 Series Instruction Manual page 97

Line differential protection ied
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Terminal J
at terminal J
Communication failure
Figure 2.7-1 Occurrences of communication failure and fault on the three-terminal line
†Note: The sub-communication channels are provided when the communication between
relays operates in the IEEE C37.94 (N=3) frame. (i.e., set Wide for scheme switch
[CH*-COM_WIDTH]). With regard to the IEEE C37.94, several bits in the frame
(N=3) are defined as auxiliary bits; users can use the auxiliary bits as the sub-
communication channels for the RDIF operation. For more information, see
Chapter
application (COMM_APPL)
RDIF operation relating to DIFL function
(i)
For the RDIF operation the user is required to send the local DIFL output-signals for the
remote terminal by the communication; the user should set the local terminal to receive the
remote DIFL output-signals.
Sending local-DIFL-operation signal
As mentioned earlier, the operation signals of the local DIFL function should be sent to the
remote DIFL functions. Figure 2.7-2 shows PLC monitoring points "DIFL-A,-B, and -C" are
provided for the sending.
Figure 2.7-2 Sending local DIFL operation signals for remote relays
†Note: The DIFL#2 element is only available in the dual mode (setting
Local_relay
(Local)
Terminal H
Relay application: Transmission control function"
".
A
B
DIFL#1
C
A
B
DIFL#2†
C
- 74 -
Fault
Remote-1_relay at
terminal G
Remote-2_relay at
terminal H
8000101C20
DIFL-A
≥1
8100101C21
DIFL-B
≥1
8200101C22
DIFL-C
≥1
6F2S1914 (0.49)
Terminal G
and "
Communication
GRL200 (Soft 033 & 037)

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