Toshiba GR200 Series Instruction Manual page 108

Busbar-G
I G (=I F )
DIFL function at
terminal-G
CBDS-A
≥1
CBDS-B
CBDS-C
Terminal-H turns to be "OPEN"
1
I H turns to zero by constraint when the CB H comes to trip.
1
I H
I G
Figure 2.8-1 Bind zone protected by the DIFL function
†Note: If any auxiliary contact (89a, 52aA, 52aB, or 52aC) is brought to be open, current
data at the terminal-H (I H ) is turn to be zero (0) unconditionally. Accordingly, the
DIFL function at a terminal-G computes the Id computed with the I G only. The
signals 'CBDS-A, CBDS-B, and CBDS-C' are able to be transferred when the user
set Wide for scheme switch [CH*_COM_WIDTH]; the user should inject and
retrieve the CBDS-A,-B,-C signals using PLC connection and monitoring points.
To find the PLC points with regard to the CBDS-A,-B,-C signals in the
communication frame, see Chapters
application
‡Note: Signals "CB1 CLOSE COMMAND" and "CB2 CLOSE COMMAND" should be
injected at remote terminals, respectively. For more information, see the
Relay application: Communication application
Line GH
DIFL function
Communication
I H
&
Σ
.
- 85 -
I H (=I F )
DS H
at terminal-H
(+)
89a
52aA 52aB 52aC
CBDS-A ≥1
CBDS-B
≥1
CBDS-C
≥1
I H
Detection of the line GH
being taken out of service
Differential Current (Id) †
Relay application: Communication
.
6F2S1914 (0.49)
Busbar-H
Blind Zone
Fault
CB H
To a busbar
protection relay
Signal ‡
"CB1 CLOSE COMMAND"
Chapter
GRL200 (Soft 033 & 037)