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Operating Times of the Definite Time Stages
7UT612
Pickup time / dropout time
for frequency
Minimum pick-up time
Pick-up time, typical
Dropout time, approx.
7UT613/63x
Pickup time / dropout time
Pickup time at frequency
Pickup time,- 2 x Pickup Value
Pickup time,- 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
Frequency
Frequency influence
Dropout times of the thermal curve
[ausloesezeiten-thermische-kennlinie-schieflast-020830-ho, 1, en_GB]
Figure 4-13
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
1
)
1
)
Trip times of the Thermal Characteristic for Unbalanced Load Protection
50 Hz
60 Hz
50 ms
45 ms
55 ms
50 ms
30 ms
30 ms
50 Hz
60 Hz
45 ms
39 ms
40 ms
39 ms
25 ms
21 ms
approx. 0.95 for Ι
/Ι
≥ 0.5
2
N
within the frequency tagging range
Technical Data
4.8 Unbalanced Load Protection
16.7 Hz
113 ms
88 ms
51 ms
433
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