
I-6
Motor Protection Circuit Breaker
J7MN
Specifications
■
Engineering data and Characteristics
Technical Data according to IEC/EN 60947-1, 60947-2, 60947-4-1 and VDE 0660
This table shows the rated ultimate short-circuit breaking capacity Icu
and the rated service short-circuit breaking capacity Ics of the J7MN
circuit-breakers with different operational voltages as a function of
the rated current In of the circuit-breakers. The circuit-breakers can
be fed at the top or bottom supply terminals without any reduction of
the rated data.
If the short-circuit current exceeds the rated short-circuit breaking
capacity of the circuit-breaker specified in the tables at the installa-
tion point, a back-up fuse is to be used. The maximum rated current
for the back-up fuse is specified in the tables. These fuses are only
suitable for the short-circuit-currents as indicated on the fuses.
Circuit-
breaker
Rated
current In
up to AC 240V
*1
*1
10% overvoltage
up to AC 400V
*1
up to AC 415V
*2
*2
5% overvoltage
up to AC 440V
*1
up to AC 460V
*2
up to AC 500V
*1
up to AC 525V
*2
up to AC 690V
*1
Icu
Ics
max.
fuse
*3
(gL/gG)
*3
Back up fuse required if short-circuit current at installation point > Icu
Icu
Ics
max.
fuse
*3
(gL/gG)
Icu
Ics
max.
fuse
*3
(gL/gG)
Icu
Ics
max.
fuse
*3
(gL/gG)
Icu
Ics
max.
fuse
*3
(gL/gG)
Type
A
kA
kA
A
kA
kA
A
kA
kA
A
kA
kA
A
kA
kA
A
J7MN-3P
0.16 to 0.63
100
100
--
100
100
--
100
100
--
100
100
--
100
100
--
1
100
100
--
100
100
--
100
100
--
100
100
--
100
100
--
1.6
100
100
--
100
100
--
100
100
--
100
100
--
3
3
20
2.5
100
100
--
100
100
--
100
100
--
50
100
--
3
3
35
4
100
100
--
100
100
--
100
38
50
15
38
50
3
3
40
6
100
100
--
100
100
--
50
11
50
10
11
40
3
3
50
8
100
100
--
100
100
--
15
11
63
10
8
40
3
3
63
10
100
100
--
50
38
80
15
11
63
6
8
63
3
3
63
13
100
100
--
50
38
80
10
8
80
6
5
63
3
3
63
17
50
38
--
20
15
100
10
8
80
6
5
80
3
3
63
22
40
30
125
15
11
100
8
6
100
6
5
80
3
3
63
26
40
30
125
15
11
100
8
6
100
6
5
80
3
3
63
32
30
22
125
15
11
100
6
4
100
5
4
80
3
3
63
J7MN-3R
0.16 to 1.0
100
100
--
100
100
--
100
100
--
100
100
--
100
100
--
1.6
100
100
--
100
100
--
100
100
--
100
100
--
100
100
--
2.5
100
100
--
100
100
--
100
100
--
100
100
--
8
8
35
4
100
100
--
100
100
--
100
100
--
100
100
--
8
8
40
6
100
100
--
100
100
--
100
100
--
100
100
--
6
6
50
8
100
100
--
100
100
--
50
38
80
50
38
63
6
6
63
10
100
100
--
100
100
--
50
38
80
50
38
80
6
6
63
13
100
100
--
100
100
--
50
38
80
42
32
80
6
6
63
17
100
100
--
50
38
100
20
15
80
10
8
80
4
4
63
22
100
100
--
50
38
125
20
15
100
10
8
80
4
4
63
26
100
100
--
50
38
125
20
15
100
10
8
80
4
4
63
32
100
100
--
50
38
125
20
15
100
10
8
80
4
4
63
J7MN-6R
26
100
100
--
50
50
125
35
27
125
12
9
100
5
5
80
32
100
100
--
50
50
125
35
27
125
10
8
100
5
5
80
40
100
100
--
50
50
160
35
27
125
10
8
100
5
5
80
50
100
100
--
50
50
160
35
27
125
10
8
100
5
5
80
63
100
100
--
50
50
160
35
27
160
10
8
100
5
5
80
J7MN-9R
63
100
100
--
50
38
160
40
30
160
12
9
100
6
5
80
75
100
100
--
50
38
160
40
30
160
8
6
125
5
4
100
90
100
100
--
50
38
160
40
30
160
8
6
125
5
4
125
100
100
100
--
50
38
160
40
30
160
8
6
125
5
4
125
--
No back-up fuse required