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11.9
Overcurrent Protection, Ground
Stage with Definite-Time Characteristic Curve
11.9.1
Setting Values
Method of measurement
Threshold value
Dropout ratio
Time delay
Dropout delay
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
Instrument current transformer
Times
Operate time with time delay = 0 ms
Extension of the operate time during operation with
transformer inrush-current detection
Dropout time
Frequency Operating Range
0.9 ≤ f/f
≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f
< f ≤ 80 Hz
rated
f < 10 Hz
f > 80 Hz
53
If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
54
OOT (Output Operating Time): additional delay of the output medium used, see Chapter
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
1 A @ 50 and 100 Irated
53
5 A @ 50 and 100 Irated
1 A @ 1.6 Irated
5 A @ 1.6 Irated
rated
11.9 Overcurrent Protection, Ground
Fundamental component
RMS value
0.010 A to 35.000 A
0.05 A to 175.00 A
0.001 A to 1.600 A
0.002 A to 8.000 A
0.90 to 0.99
0.00 s to 60.00 s
0.00 s to 60.00 s
15 mA sec. (I
= 1 A) or
rated
75 mA sec. (I
= 5 A)
rated
0.5 mA sec. (I
= 1 A) or
rated
2.5 mA sec. (I
= 5 A)
rated
Approx. 25 ms + OOT
54
at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Approx. 10 ms
Approx. 20 ms + OOT
According to specified tolerances
Slightly expanded tolerances
Active
11.1.4 Relay Outputs
Technical Data
–
Increments of 0.001 A
Increments of 0.01 A
Increments of 0.001 A
Increments of 0.001 A
Increments of 0.01
Increments of 0.01 s
Increments of 0.01 s
.
rated,sec
1123
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