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Technical Data
10.11 49 Thermal Overload Protection
10.11
49 Thermal Overload Protection
Reference
I
set
T
th
Operate and Reset Level
I
op
Operate and Reset Time
Attribute
t
Overload trip operate time
op
(min)
Repeatability
Current
(multi-
0.5 min 1 min
ples of
setting
)
1.2
35.57
1.5
17.63
2
8.63
2.5
5.23
3
3.53
3.5
2.55
4
1.94
4.5
1.52
5
1.22
5.5
1.01
516
Parameter
Overload setting
Time constant setting
Attribute
Operate level
Reset level
Repeatability
Variation IEC
-10 °C to +55 °C
60255-1
f
rated
Value
± 100 ms
Operate time t for various time constraints (s)
2 min
3 min
71.14
142.27 213.41 355.69 711.37 1067.0
35.27
70.53
105.8
17.26
34.52
51.78
10.46
20.92
31.38
7.07
14.13
21.2
5.11
10.22
15.33
3.87
7.74
11.62
3.04
6.08
9.12
2.45
4.9
7.35
2.02
4.03
6.05
Value
0.1 to 3 ⋅ I
0.5 to 1000 min, Δ 0.5 min
Value
I
: ± 5 % or ± 1 % I
set
≤ 95 % I
± 1 %
≤ 5 %
± 5 %
≤ 5 %
5 min
10 min 15 min 20 min 30 min 50 min 100
6
176.34 352.67 529.01 705.34 1058.0
86.3
172.61 258.91 345.22 517.83 863.05 1726.0
52.31
104.61 156.92 209.22 313.84 523.06 1046.1
35.33
70.67
106
25.55
51.09
76.64
19.36
38.72
58.08
15.19
30.39
45.58
12.25
24.49
36.74
10.08
20.17
30.25
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
, Δ 0.01 I
rated
rated
rated
op
± 5 % or ± 100 ms, (I
: 0.3 to 3
set
⋅ I
)
rated
I = Average rms current
I
= Pre‑load current
p
I
= Thermal overload setting
θ
current
τ = Thermal heating time
constant (minutes)
ln = Natural logarithm
t = Operate time (minutes)
1422.7
2134.1
3556.8
5
2
7
176..36 3526.7
2
141.34 212.01 353.35 706.7
102.19 153.28 255.47 510.95
77.45
116.17 193.62 387.23
60.77
91.16
151.93 303.86
48.99
73.48
122.47 244.93
40.34
60.51
100.85 201.7
C53000-G7040-C014-1, Edition 11.2019
min
7113.7
4
2
9
2
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