Single-Phase Time Overcurrent Protection - Siemens SIPROTEC 7UT613 series Manual

4 Technical Data
4.7

Single-Phase Time Overcurrent Protection

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