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1.6
60
Line differential protection, phase segregated
(DIFL)
Signal
RTCSEND2
RTCSEND1
CBOPEN*
VTSU*
*) Only when charging current compensation, CCC is included
Path in local HMI: ServiceReport/Functions/Differential/FuncOutputs
Table 70:
Output signals for the DIFL (DIFL-) function block
Signal
TRIP
TRL1
TRL2
TRL3
RTCREC2
RTCREC1
CTSAT
COMOK
COMFAIL
Setting parameters
Path in local HMI-tree: Settings/Functions/Groupn/Differential
Table 71:
Setting parameters for the line differential protection function (DIFL)
Parameter
Range
Operation
Off, On
CTFactor
0.40-1.00
Step: 0.01
IMinSat
100-1000
Step: 1
IMinOp
20-150
Step: 1
IDiffLvl1
20-150
Step: 1
IDiffLvl2
30-150
Step: 1
ILvl1/2Cross
100-1000
Step: 1
Evaluate
2 of 4,
3 of 4
Description
Signal to remote terminal, input 2
Signal to remote terminal, input 1
Breaker position for charging current compensation
Block of charging current compensation at fuse failure
Description
Trip by line differential function
Trip by line differential function phase L1
Trip by line differential function phase L2
Trip by line differential function phase L3
Signal from remote terminal, output 2
Signal from remote terminal, output 1
CT saturation detected
Communication OK
Communication failure
Default
Unit
Description
Off
-
Operating mode for DIFL function
1.00
-
Factor for matching Current Transformer
300
% of I1b
Minimum phase current for saturation
detection operation
20
% of I1b
Minimum differential operating current
20
% of Ibias Slope 1 stabilisation
50
% of Ibias Slope 2 stabilisation
500
% of I1b
Slope 2 intersection
2 of 4
-
Tripping conditions, 2 or 3 out of 4 mes-
sages
Chapter 4
Line differential protection
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