Siemens SIPROTEC 7UT63 series - 4.7 Single-Phase Time Overcurrent Protection

4 Technical Data
456
7UT613/63x Manual
C53000-G1176-C160-2
4.7 Single-Phase Time Overcurrent Protection
Current Stages
Operating Times
Dropout to Pickup Ratios
Frequency
High current stage I>> 0.05 A to 35.00 A
1)
0.003 A to 1.500 A
2)
or ∞ (ineffective)
Steps 0.01 A
Steps 0.001 A
T
I>>
0.00 s to 60.00 s
or ∞ (no trip)
Steps 0.01 s
Definite time stage I> 0.05 A to 35.00 A
1)
0.003 A to 1.500 A
2)
or ∞ (ineffective)
Steps 0.01 A
Increments
0.001 A
T
I>
0.00 s to 60.00 s
or ∞ (no trip)
Steps 0.01 s
Tolerances
currents 3 % of setting value or 1 % rated current for I
N
= 1 A or 5 A
5 % of setting value or 3 % rated current for I
N
= 0.1 A
times 1 % of set value or 10 ms
The set times are pure delay times.
1)
Secondary values for I
N
= 1 A; for I
N
= 5 A the currents must be multiplied by 5.
2)
Secondary values for „sensitive“ measurement input, irrespective of nominal current
Pickup time / dropout time
for frequency 50 Hz 60 Hz 16.7 Hz
minimum pick-up time
1
) 14ms 13ms 14ms
Dropout time, approx. 25 ms 22 ms 66 ms
1
) for high-speed relays, the pick-up times decrease by 4.5 ms
Current stages approx. 0.95 for I/I
N
≥ 0.5
Frequency influence within the frequency tagging range