
78
1
Issue C
%
Germany (0 91 87) 10-0 - USA (847) 827-7600 - UK (01296) 420336 - www.etacbe.com
Thermal Overcurrent Circuit Breaker 3130
Standard current ratings and typical internal resistance values
Current
rating
(A)
0.1
0.2
0.3
0.4
0.5
0.8
1
1.2
1.5
2
2.5
3
Internal
resistance per pole
(
)
94
24
12
5.30
4.20
1.50
0.9
0.80
0.45
0.27
0.0785
0.0595
Current
rating
(A)
3.5
4
5
6
7
8
10
12
14
16
18
20
Internal
resistance per pole
(
)
0.0565
0.0435
0.0325
0.0215
0.0165
0.0165
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
Internal connection diagrams
Typical time/current characteristics
Multi-pole types: all poles symmetrically loaded
With single pole overload, thermal
tripping will be at approx. 1.54 x I
with 2 pole devices
and at approx. 1.6 x I
N
with 3 pole devices.
0.1...2 A
2.5...20 A 1 pole
2.5...16 A 2 and 3 pole
2.I
2.2
LINE I.I
I.2
3.I
2.2
LINE I.I
I.2
2.I
2.2
LINE I.I
I.2
2.I
2.3
LINE I.I
I.3
1 pole
3 pole
2 pole
switch
lamp
load
1
2
4
6
8 10
20
40
… times rated current
T
10000
1000
100
10
1
0.1
+23
°
C
+60
°
C
-30
°
C
1
2
4
6
8 10
20
40
… times rated current
T
10000
1000
100
10
1
0.1
+23
°
C
+60
°
C
-30
°
C
Time/current characteristics are calibrated at 23
°
C (see page 8). For
operation at other temperatures please apply the factors below to determine
the circuit breaker rating required.
Ambient temperature
°
C
-30 -20 -10 0 +23 +40 +50 +60
Multiplication factor
0.8 0.84 0.88 0.92 1 1.08 1.14 1.23