74
Time delayed residual overcurrent protection
(TEF)
Chapter 5
Current
Table 84: Output signals for the TEF (TEF--) function block
3.6 Setting parameters
Path in local HMI: Settings/Functions/Groupn/EarthFault/TEF
Table 85: Settings for the TEF (TEF--) function
Signal Description
TRIP Trip by TEF
TRSOTF Trip by earth fault switch onto fault function
START Non directional start
STFW Forward directional start
STRV Reverse directional start
Parameter Range Default Unit Description
Operation Off, On Off - Operating mode for TEF function
IMeasured I4, I5 I4 - Current signal used for earth fault func-
tion
Characteristic Def, NI, VI, EI,
LOG
Def - Time delay characteristic for TEF protec-
tion
IN> 5 - 300
Step: 1
5 % of Inb Start current for TEF function (I4b or I5b)
IMin 100 - 400
Step: 1
100 % of IN Minimum operating current
t1 0.000 -
60.000
Step: 0.001
0.000 s Independent time delay
k 0.05 - 1.10
Step: 0.01
0.05 - Time multiplier for dependent time delay
tMin 0.000 -
60.000
Step: 0.001
0.050 s Min. operating time for dependent time
delay function
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