Siemens SIPROTEC 7UT613 series, Manual, Page: 469 / 638

4.11 Overload Protection
469
7UT613/63x Manual
C53000-G1176-C160-2
4.11 Overload Protection
Setting Ranges
Times
Dropout-to-Pickup Ratio
Tripping Time Characteristic
Tolerances
Influencing Variables
Pickup threshold
(warning stage) 1.00 to 1.20 Steps 0.01
Pickup threshold
(stepped characteristic) 1.00 to 1.40 Steps 0.01
Time delay (warning stage
and stepped charact.) T U/f>, T U/f>> 0.00 to 60.00 s
or
∞
(ineffective)
Steps 0.01 s
Pair of values for character-
istic of U/f 1.05/1.10/1.15/1.20/1.25/1.30/1.35/1.40
Associated time delays for
thermal characteristic t (U/f) 1 s to 20,000 s Steps 1 s
Time for cool down T
COOL DOWN
1 s to 20,000 s Steps 1 s
Pickup/dropout times of warning stage and stepped characteristic
Pickup time at frequency 50 Hz 60 Hz 16.7 Hz
Minimum 36 ms 31 ms 91 ms
Dropout time, approx. 36 ms 23 ms 70 ms
Dropout/Pickup approx. 0.95
Thermal replica and stepped characteristic For default settings see Figure 4-19
U/f pickup 3 % of set value
Time delay (warning stage and stepped char-
act.) 1 % of setting value, or 10 ms (min. 1.5
cycles)
Thermal replica 5 %, related to U/f
±
600 ms
Power supply direct voltage in range 0.8
≤
U
H
/U
HN
≤
1.15
≤
1 %
Temperature in range –5
°
C
≤ δ
amb
≤
55
°
C
≤
0.5 %/10 K
Frequency in range 0.95
≤
f/f
N
≤
1.05
≤
1 %
Harmonic currents
up to 10 % 3rd harmonic
up to 10 % 5th harmonic
≤
1 %
≤
1 %