Influencing Variables for Thresholds
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
< 5 %
Stage with Inverse-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
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
Disk emulation
Instantaneous
–
Time multiplier
0.00 to 15.00
Increments of 0.01
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
95 % of 1.1 ⋅ threshold value
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)
Reset of the Integration Timer
Instantaneous
With dropout
Disk emulation
Approx. < 0.90 ⋅ threshold value
Operate Curves and Dropout-Time Characteristic Curves according to IEC
Extension of the operate time during operation with
transformer inrush-current detection
Approx. 10 ms
12.9.2
Technical Data
12.9 Overcurrent Protection, Phases
SIPROTEC 5, Paralleling Device, Manual
733
C53000-H5040-C071-1, Edition 05.2018
