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MaGnuM PRoDuct GuiDe
CA013002EN—April 2017 www.eaton.com
60
Technical data and endurance information for installation
Table 26 . IEC Bus Bar sizes and quantities
Maximum
service
current,
amperes
(40
o
c
ambient)
circuit
breaker
frame
(MWn
& MWi)
Recommended bus bar
quantities and sizes
(in)
(mm)
800
08
(2) 5x50
(1) .25x3.0
1000
10
(2) 5x60
(2) .25x2.0
1250
12
(2) 5x80
(2) .25x3.0
1600
16
(2) 5x100
(2) .25x3.0
2000
20
(3) 5x100
(3) .25x3.0
2500
25
(4) 5x100
(4) .25x3.0
3200
32
(3) 10x100
(3) .25x6
4000
40
(4) 10x100
(4) .25x6
5000
50
(5) 10x100
(5) .25x6
6300
63
(6) 10x100
(6) .25x6
6300A only available in Magnum IEC frame
Example 1
Example 2
Example 3
T = Thickness of Bus Bar
W = Width of Bus Bar
(T)
(W)
Illustration of 2.25in by 3in Bus
Bars stacked to carry 1600 amperes
(0.25 in)
(3 in)
Illustration of 2.25mm by 60mm Bus
Bars stacked to carry 800 amperes
(5 mm)
(60 mm)
•
Altitude factors
All Magnum breakers, including IEC rated breakers, can
be applied at their full voltage and current ratings up to a
maximum altitude of 2000 meters above sea level . When
installed at higher altitudes, the ratings are subject to
correction factors . Short circuit current is not affected as long
as the voltage is rated in accordance with the information
shown in the table .
Table 24 . Altitude rating factors
altitude
(meters)
Voltage
correction
current
correction
2000
1.000
1.000
2150
0.989
0.998
2300
0.976
0.995
2450
0.963
0.993
2600
0.950
0.990
2750
0.933
0.987
2900
0.917
0.983
3050
0.900
0.980
3200
0.883
0.977
3350
0.867
0.973
3500
0.850
0.970
3650
0.833
0.967
3800
0.817
0.963
3950
0.800
0.960
5000
0.700
0.940
•
Test bus configuration
The bus bar size examples shown here are those specified by
ANSI, IEC 947-1 and/or used by Eaton in their breaker type testing .
They are for 3 meter long bus bar with the faces vertical and painted
flat black . For other bus bar configurations, larger bus bar sizes may be
required or the breaker may have to be de-rated . Refer to the tables
presented earlier in this section for de-rating information at higher
ambient temperatures
Table 25 . ANSI Bus Bar sizes and quantities
Maximum
services
current,
amperes
(40
o
c
ambient)
circuit
breaker
frame
(MDS,
MDn,
SbS,
Sbn)
Recommended bus bar
quantities and sizes
(in)
(mm)
800
08
(1) .25x3.0
(2) 5x50
1000
10
(2) .25x2.0
(2) 5x60
1200
12
(2) .25x3.0
(2) 5x80
1600
16
(2) .25x3.0
(2) 5x100
2000
20
(3) .25x3.0
(3) 5x100
2500
25
(4) .25x3.0
(4) 5x100
3200
32
(3) .25x6
(3) 10x100
4000
40
(4) .25x6
(4) 10x100
5000
50
(5) .25x6
(5) 10x100
6300
63
(6) .25x6
(6) 10x100
6300A only available in Magnum IEC frame
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