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Tolerances
3I0 measured via I4
fundamental component
3I0 measured via I4
(33 % harmonics, in relation to fundamental component)
Up to 30th harmonic
Up to 50th harmonic, f
Up to 50th harmonic, f
Time delays
Influencing Variables for Thresholds
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
Stage with Inverse-Time Characteristic Curve
12.7.2
Setting Values
Method of measurement
Threshold value
Dropout
Time multiplier
Minimum time of the curve
Additional time delay
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout
Minimum absolute dropout differential
Protection-class current transformer
Instrument current transformer
Slightly expanded tolerances will occur during the calculation of 3I0, maximum factor of 2
46
Slightly expanded tolerances will occur during the calculation of 3I0, maximum factor of 2
47
48
If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
46
, method of measurement =
47
, method of measurement = RMS value
= 50 Hz
rated
= 60 Hz
rated
1 A @ 50 and 100 Irated
48
5 A @ 50 and 100 Irated
1 A @ 1.6 Irated
5 A @ 1.6 Irated
12.7 Overcurrent Protection, Ground
1 % of the setting value or 5 mA (I
or 25 mA (I
= 5 A), (f
rated
rated
1 % of the setting value or 5 mA (I
or 25 mA (I
= 5 A), (f
rated
rated
3 % of the setting value or 20 mA (I
or 100 mA (I
= 5 A), (f
rated
rated
4 % of the setting value or 20 mA (I
or 100 mA (I
= 5 A), (f
rated
rated
1 % of the setting value or 10 ms
< 5 %
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
Disk emulation
Instantaneous
0.00 to 15.00
0.00 s to 1.00 s
0.00 s to 60.00 s
95 % of 1.1 ⋅ threshold value
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
Technical Data
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
–
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
817
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