Magnum
1812.900A
7
Table 1-1: Magnum Circuit Breaker Ratings
Maximum
Amperes
Breaker Designation
Ics = Icu
*
(kA)
Icw1s/3s (kA)
800
MWN-408
MWN-508
MWN-608
MWI-408
MWI-608
MWI-808
MWI-C08
40
50
65
40
65
85
100
1
40/NA
50/NA
65/40
40/NA
65/50
85/65
85/65
1250
MWN-412
MWN-512
MWN-612
MWI-412
MWI-612
MWI-812
MWI-C12
40
50
65
40
65
85
100
1
40/NA
50/NA
65/40
40/NA
65/50
85/65
85/65
1600
MWN-516
MWN-616
MWI-616
MWI-816
MWI-C16
50
65
65
85
100
1
50/NA
65/40
65/50
85/65
85/65
2000
MWN-520
MWN-620
MWI-620
MWI-820
MWI-C20
50
65
65
85
100
1
50/30
65/40
65/50
85/65
85/65
2500
MWI-625
MWI-825
MWI-C25
65
85
100
1
65/50
85/65
85/65
3200
MWI-632
MWI-832
MWI-C32
MWK-232
65
85
100
1
25
65/50
85/65
100/65
NA
4000
MWI-641
3
MWI-841
3
MWI-C41
3
MWI-640, 64N
MWI-840, 84N
MWI-C40, C4N
MWI-E40, E4N
65
85
100
1
65
85
100
150
2
65/NA
85/65
100/85
150/100
5000
MWI-850, 85N
MWI-C50, C5N
MWI-E50, E5N
85
100
150
2
85/65
100/85
150/100
6300
MWI-863, 86N
MWI-C63, C6N
MWI-E63, E6N
85
100
150
2
85/65
100/85
150/100
* All ratings at 690 Vac except MWK which is rated
1100
Vac
1
Icu only; Ics = 85kA
2
Icu only; Ics = 100kA
3
Standard width breaker (not double-wide)
A
B
C
D
E
A. Low voltage air circuit breaker family name
B. Breaker family designation number
C. Breaker frame size in amperes
D. Interrupting capacity rating
E. Factory Equipped Accessories
Figure 1-2: Typical Magnum Nameplate
WARNING
TYPE MAGNUM CIRCUIT BREAKERS ARE ROBUST
AND ARE PROVIDED WITH SAFETY FEATURES.
NEVERTHELESS, THE VOLTAGES, CURRENTS AND
POWER LEVELS AVAILABLE IN AND AROUND THIS
EQUIPMENT WHEN IT IS IN OPERATION ARE
EXTREMELY DANGEROUS AND COULD BE FATAL.
UNDER NO CIRCUMSTANCES SHOULD INTERLOCKS
AND OTHER SAFETY FEATURES BE MADE
INOPERATIVE, AS THIS MAY RESULT IN DEATH,
BODILY INJURY OR PROPERTY DAMAGE.