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