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The set times are pure delay times.
1)
Secondary values for Ι
Operating Times of the Definite Time Stages
7UT612
Pickup time / dropout time
Pickup time at frequency
without inrush restraint, min.
without inrush restraint, typical
with inrush restraint, min.
with inrush restraint, typical
Dropout time, typical
7UT613/63x
Pickup time / dropout time
Pickup time at frequency
without inrush restraint,- 2 x Pickup Value
without inrush restraint,- 10 x Pickup Value
with inrush restraint,- 2 x Pickup Value
with inrush restraint,- 10 x Pickup Value
Dropout time, approx.
1
) For high-speed relays, the pick-up times decrease by 4.5 ms
Dropout to Pickup Ratios
Current stages
Inrush Restraint
Inrush restraint ratio
(2nd harmonic) Ι
Lower operation limit
Max. current for restraint
1)
Secondary values for Ι
Frequency
Frequency influence
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
= 1 A; for Ι
= 5 A the currents must be multiplied by 5.
N
N
1
)
1
)
1
)
/Ι
2fN
fN
= 1 A; bei Ι
= 5 A the currents must be multiplied by 5.
N
N
4.5 Time Overcurrent Protection for Earth Current
50 Hz
20 ms
25 ms
40 ms
45 ms
30 ms
50 Hz
25 ms
17 ms
1
)
43 ms
35 ms
33 ms
approx. 0.95 for Ι/Ι
≥ 0.5
N
10 % to 45 %
Ι > 0.2 A
1)
0.30 A to 25.00 A
1)
within the frequency tagging range
Technical Data
60 Hz
18 ms
23 ms
35 ms
40 ms
30 ms
60 Hz
16.7 Hz
23 ms
45 ms
14 ms
17 ms
41 ms
108 ms
31 ms
78 ms
29 ms
53 ms
Increments 1 %
Increments 0.01 A
429
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