Siemens SIPROTEC 4 7UT6 Series User Manual

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

Siemens SIPROTEC 4 7UT6 Series Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7UT6 Series
Category	Protection Device
Language	English