Overcurrent Protection, Phases
Stage with Definite-Time Characteristic Curve
Setting Value for the Function Block Filter
h(0)
-100.000 to 100.000
Increments of 0.001
h(1)
-100.000 to 100.000
Increments of 0.001
h(2)
-100.000 to 100.000
Increments of 0.001
h(3)
-100.000 to 100.000
Increments of 0.001
h(4)
-100.000 to 100.000
Increments of 0.001
Setting Values for Protection Stage
Method of measurement
Fundamental component
RMS value
–
Threshold value
37
1 A @ 50 and 100 Irated
0.030 A to 35.000 A
Increments of 0.001 A
5 A @ 50 and 100 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
0.90 to 0.99
Increments of 0.01
Operate delay
0.00 s to 100.00 s
Increments of 0.01 s
Dropout delay
0.00 s to 60.00 s
Increments of 0.01 s
Pickup delay
0.00 s to 60.00 s
Increments of 0.01 s
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 with time delay = 0 ms
Approx. 25 ms + OOT
38
at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Extension of the operate time during operation with
transformer inrush-current detection
Approx. 10 ms
Dropout time
Approx. 20 ms + OOT
12.9
12.9.1
37
If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
rated,sec
.
38
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
Technical Data
12.9 Overcurrent Protection, Phases
SIPROTEC 5, Paralleling Device, Manual
731
C53000-H5040-C071-1, Edition 05.2018
