75
Time delayed residual overcurrent protection
(TEF)
Chapter 5
Current
3.7
Technical data
Table 86:
TEF - Time delayed non-directional residual overcurrent protection
Parameter
Setting range
Accuracy
Start current, definite time or inverse
time delay, IN>
5-300% of Ib in steps of
1%
±
5% of set value
Characteristic angles
65 degrees lagging
±
5 degrees at 20 V and I
set
=35%
of I
r
Definite time delay
0.000 - 60.000 s in steps
of 1ms
±
0.5 % +/-10 ms
Time multiplier for inverse time delay
k
0.05-1.10 in steps of 0.01 According to IEC 60255-3
Normal inverse characteristic
I = I
meas
/I
set
IEC 60255-3 class 5
±
60 ms
Very inverse characteristic
IEC 60255-3 class 7.5
±
60 ms
Extremely inverse characteristic
IEC 60255-3 class 7.5
±
60 ms
Logarithmic characteristic
±
5 % of t at I = (1.3-29)
×
I
N
Min. operate current for dependent
characteristic, IMin
100-400% of IN in steps
of 1%
±
5% of I
set
Minimum operate time for dependent
characteristic, tMin
0.000-60.000 s in steps
of 1 ms
±
0.5 %
±
10 ms
Reset time
<70 ms
-
t
13.5
I
1
–
-----------
k
⋅
=
t
5.8
1.35
–
ln
I
I
N
-----
⋅
=
Содержание REL 551-C1*2.5
Страница 1: ...Technical reference manual ProtectIT Line differential protection terminal REL 551 C1 2 5 ...
Страница 23: ...14 Introduction to the technical reference manual Chapter 1 Introduction ...
Страница 39: ...30 Technical data Chapter 2 General ...
Страница 63: ...54 Blocking of signals during test BST Chapter 3 Common functions ...
Страница 71: ...62 Line differential protection phase segregated DIFL Chapter 4 Line differential protection ...
Страница 89: ...80 Thermal phase overload protection THOL Chapter 5 Current ...
Страница 101: ...92 Event function EV Chapter 7 Logic ...
Страница 160: ...151 Chapter 11 Diagrams Chapter 11 Diagrams This chapter contains the terminal diagrams for the terminal ...
Страница 162: ...153 Terminal diagrams Chapter 11 Diagrams 1 2 Terminal diagram REL 551 C1 Figure 38 REL 551 C1 ...
Страница 163: ...154 Terminal diagrams Chapter 11 Diagrams Figure 39 REL 551 C1 with DC switch ...
Страница 167: ...158 Terminal diagrams Chapter 11 Diagrams ...