Motor Protection Circuit Breaker
J7MN
I-9
L
o
w vol
tage
switch
gear
Permissible ratings of devices approved for North America
Circuit breakers J7MN as „Manual Motor Starter“
If used as „Manual Motor Starter“ the circuit breaker is always oper-
ated in combination with a short circuit device. For use with appro-
bated fuses or circuit breakers according to UL489 or CSA22.2 No. 5
only. The sizes are selected according to National Electrical Code
(UL), or Canadian Electrical Code (CSA)
Circuit breakers J7MN as "Combination Motor Controller Type E" and " Suitable for Group Installation"
Acc to UL508 demands a line-side 1 inch air and 2 inch creepage
distance for „Combination Motor Controller Type E“ is necessary.
Therefor circuitbreaker J7MN-3R is approved to UL 508 in combina-
tion with the Terminal block J7MN-TB32. Circuit-breakers J7MN-9R
are approved to UL 508 in combination with the insulation barriers
J7MN-TB100. According to CSA these terminal blocks can be omit-
ted when the device is used as "Combination Motor Controller
Type E“.
J7MN-3
Rated operational current
Ie
0.16 0.25
0.4 0.63
1
1.6
2.5
4
6
8
10
13
17
22
26
32
A
Max. short-cir-
cuit current
J7MN-3P
240 V
100
100
100
100
100
100
100
100
100
100
50
50
40
30
30
20 kA
480 V
50
50
50
50
50
50
50
50
25
25
10
10
10
10
7.5
7.5 kA
600 V
10
10
10
10
10
10
10
5
5
5
5
5
5
5
5
5 kA
J7MN-3R
240 V
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100 kA
480 V
50
50
50
50
50
50
50
50
50
50
50
50
30
30
30
30 kA
600 V
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10 kA
Motor load
1-phase
115 V
-
-
-
-
-
-
-
1
/
8
1
/
4
1
/
3
1
/
2
1
/
2
1
1
1
/
2
2
2 HP
230 V
-
-
-
-
-
1
/
10
1
/
6
1
/
3
1
/
2
1
1
1
/
2
2
3
3
5
5 HP
Motor load
3-phase
200 V
-
-
-
-
-
-
1
/
2
3
/
4
1
2
2
3
3
5
7
1
/
2
7
1
/
2
HP
230 V
-
-
-
-
-
1
/
3
1
/
2
1
1
1
/
2
2
3
3
5
7
1
/
2
7
1
/
2
10 HP
460V
-
-
-
-
1
/
2
3
/
4
1
2
3
5
5
7
1
/
2
10
15
15
20 HP
600V
-
-
-
-
1
/
2
1
1
1
/
2
3
5
5
10
10
15
20
20
30 HP
Max. rated fuse
1
1
1
1
3
6
10
15
20
30
40
50
60
80
100
125 A
Max. breaker size
15
15
15
15
15
15
15
15
20
30
40
50
60
80
100
125 A
J7MN-6R
J7MN-9R
Rated operational current
Ie
26
32
40
50
63
63
75
90
100
A
Max. short-circuit current
240 V
100
100
100
100
100
100
100
100
100 kA
480 V
50
50
50
50
50
25
25
25
25 kA
600 V
10
10
10
10
10
10
10
10
10 kA
Motor load
1-phase
115 V
2
3
3
5
5
5
7
1
/
2
10
10 HP
230 V
5
5
7
1
/
2
10
15
15
15
20
20 HP
Motor load
3-phase
230 V
10
10
15
15
20
25
25
30
40 HP
460V
20
25
30 40
1
/
2
50
50
60
75
75 HP
600V
25
30
40
50
60
60
75
100
100 HP
Max. rated fuse
100
125
150
200
250
250
300
350
400 A
Max. breaker size
100
125
150
200
250
250
300
350
400 A
J7MN-3R + J77MN-TB32
Rated operational current
Ie
0.16 0.25
0.4 0.63
1
1.6
2.5
4
6
8
10
13
17
22
26
32
A
Max. short-circuit current
240 V
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100 kA
480 V
50
50
50
50
50
50
50
50
50
50
50
50
30
30
30
30 kA
600 V
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10 kA
Motor load
1-phase
115 V
-
-
-
-
-
-
-
1
/
8
1
/
4
1
/
3
1
/
2
1
/
2
1
1
1
/
2
2
2 HP
230 V
-
-
-
-
-
1
/
10
1
/
6
1
/
3
1
/
2
1
1
1
/
2
2
3
3
5
5 HP
Motor load
3-phase
200 V
-
-
-
-
-
-
1
/
2
3
/
4
1
2
2
3
3
5
7
1
/
2
7
1
/
2
HP
230 V
-
-
-
-
-
1
/
3
1
/
2
1
1
1
/
2
2
3
3
5
7
1
/
2
7
1
/
2
10 HP
460V
-
-
-
-
1
/
2
3
/
4
1
2
3
5
5
7
1
/
2
10
15
15
20 HP
600V
-
-
-
-
1
/
2
1
1
1
/
2
3
5
5
10
10
15
20
20
30 HP
Max. rated fuse or breaker
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500 A
