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1.4
1.5
Line differential protection, phase segregated
(DIFL)
Logic diagram
DIFL-RTCSEND1
DIFL-RTCSEND2
DIFL-BLOCK
7
I
8
1
Communication interface
2
Communication logic
3
Remote trip
4
Remote current value
5
Remote saturation detection
6
Remote block
7
Fourier filter
8
Saturation detector
Figure 18:
Simplified block diagram, line differential protection function
Input and output signals
Table 69:
Input signals for the DIFL (DIFL-) function block
Signal
BLOCK
CTSUP
1
3
2
4
5
6
≥
1
≥
1
Description
Block of line differential function
Block from current circuit supervision function
Chapter 4
Line differential protection
DATA TRANSMIT
DATA RECEIVE
DIFL-RTCREC1
DIFL-RTCREC2
DIFL-BLOCK
DIFL-CTSAT
Idiff
DIFL-TRIP
≥
1
Ibias
en01000087.vsd
59
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