Instantaneous High-Current Tripping
Setting Values
Threshold value
1 A @ 100 Irated
0.030 A to 35.000 A
Increments of 0.001 A
5 A @ 100 Irated
0.15 A to 175.00 A
Increments of 0.01 A
1 A @ 50 Irated
0.030 A to 35.000 A
Increments of 0.001 A
5 A @ 50 Irated
0.15 A to 175.00 A
Increments of 0.01 A
1 A @ 1.6 Irated
0.001 A to 1.600 A
Increments of 0.001 A
5 A @ 1.6 Irated
0.005 A to 8.000 A
Increments of 0.001 A
Dropout ratio
0.50 to 0.90
Increments of 0.01
Dropout
The greater dropout differential (=
| pickup value – dropout value |
) of the following 2 criteria
applies:
Dropout differential derived from the parameter
Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer
15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer
0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Times
Operate time for current > 2·√2·threshold value
Approx. 8 ms + OOT
60
Tolerances
Response tolerance, current
5 % of setting value or 10 mA
at I
rated
= 1 A
5 % of setting value or 50 mA
at I
rated
= 5 A
Time delays
1 % of the setting value or 10 ms
12.11
60
OOT (Output Operating Time) Additional delay of the output medium used, see Chap.
Technical Data
12.11 Instantaneous High-Current Tripping
SIPROTEC 5, Paralleling Device, Manual
753
C53000-H5040-C071-1, Edition 05.2018
