Low Voltage Switch Gear
Appendix
93
Permissible ratings of devices approved for North America
Circuit breakers of J7MN series are approved for USA and Canada. According to UL 508 and C22.2 No.14 they can also be used with a load feeder
contactor. These Circuit breakers can be used as „Manual Motor Starter“ for „Group Fusing“ or for „Group Installation“ or as „Manual Motor Con-
troller Suitable for Tap Conductor Protection in Group Installations“ or as „Self Protected Combination Motor Controller“ (Type E).
Circuit breakers J7MN as
„Manual Motor Starter“
If used as „Manual Motor Starter“ the circuit breaker is always operated in combination with a short circuit
device. For use with approbated fuses or circuit breakers according to UL489 or CSA22.2 No. 5 only. The
size are selected according to National Electrical Code (UL), or Canadian Electrical Code (CSA).
Circuit breakers J7MN as
„Manual Motor Controller Suitable for Tap Conductor Protection in Group
Installations“
For UL only, not for CSA. If used as „Manual Motor Controller Suitable for Tap Conductor Protection in
Group Installations“ the circuit breaker is always operated in combination with a short circuit device. For
use with approbated fuses or circuit breakers according to UL489 only. The size are selected according
to National Electrical Code.
Circuit breakers J7MN as
„Combination Motor Controller Type E“
As of UL 16. 07. 2001, UL508 demands a line-side 1 air and 2 creepage distance for „Combination Motor Controller Type E“ Therefor circuitbreakers
J7MN-25 and J7MN-100 are approved to UL 508 in combination with the terminal blocks listed below. The basic unit of circuit-breakers J7MN-25
conforms with the required air/creepage distances. According to CSA these terminal blocks can be omitted when the device is used as „Combina-
tion Motor Controller Type E“.
Circuit breaker
J7MN12
J7MN25
J7MN50
J7MN100
NEMA Size 00
FLA max. 12 A, 600 V
hp-rating max.
NEMA Size 1
FLA max. 25 A, 600 V
hp-rating max.
NEMA Size 2
FLA max. 50 A, 600 V
hp-rating max.
NEMA Size 3
FLA max. 100 A, 600 V
hp-rating max.
V
1-phas.
3-phas.
1-phas.
3-phas.
1-phas.
3-phas.
1-phas.
3-phas.
110/120
1/2
–
2
–
3
–
10
–
200
11/2
3
3
71/2
71/2
15
20
30
220/240
2
3
5
71/2
10
20
20
40
440/480
–
71/2
–
15
–
40
–
75
550/600
–
10
–
20
–
50
–
100
Circuit breaker
J7MN12
J7MN25
J7MN50
J7MN100
NEMA Size 00
FLA max. 12 A, 600 V
hp-rating max.
NEMA Size 1
FLA max. 25 A, 600 V
hp-rating max.
NEMA Size 2
FLA max. 50 A, 600 V
hp-rating max.
NEMA Size 3
FLA max. 100 A, 600 V
hp-rating max.
V
1-phas.
3-phas.
1-phas.
3-phas.
1-phas.
3-phas.
1-phas.
3-phas.
110/120
1/3
–
2
–
3
–
10
–
200
3/4
2
3
71/2
71/2
15
20
30
220/240
1
2
3
71/2
10
20
20
40
440/480
–
5
–
15
–
40
–
75
550/600
–
–
–
10
–
50
–
75
Circuit breaker
J7MN12
J74MN-TB25
J7MN50
J J74MN-TB100
NEMA Size 00
FLA max. 12 A, 600 V
hp-rating max.
NEMA Size 1
FLA max. 25 A, 600 V
hp-rating max.
NEMA Size 2
FLA max. 50 A, 600 V
hp-rating max.
NEMA Size 3
FLA max. 100 A, 600 V
hp-rating max.
V
1-phas.
3-phas.
1-phas.
3-phas.
1-phas.
3-phas.
110/120
–
2
–
3
–
10
–
200
–
3
71/2
71/2
15
20
30
220/240
–
3
71/2
10
20
20
40
440/480
–
–
15
–
40
–
75
550/600
–
–
10
–
50
–
75
Ratings of auxiliary switches and alarm switches
Lateral auxiliary switch with 1NO + 1 NC
J73MN11S
Transversal auxiliary switch with 1NO +
1NC
J73MN11F
Max. rated voltage to NEMA AC V
600
240
uninterupted current A
10
2,5
Breaking capacity AC
A600
C300
DC
Q300
R300
Inlet according
upstream
short circuit
protection device
Inlet according
outlet
short circuit
protection device
