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