Eaton Magnum SB Series Technical Product Manual page 60

Technical data and endurance information for installation
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 Voltage
(meters) correction
2000 1.000
2150 0.989
2300 0.976
2450 0.963
2600 0.950
9
2750 0.933
2900 0.917
1
3050 0.900
3200 0.883
1
3350 0.867
3500 0.850
1
3650 0.833
1
3800 0.817
3950 0.800
1
5000 0.700
1
Test bus configuration
•
The bus bar size examples shown here are those specified by
1
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
1
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
1
ambient temperatures
1
Table 25 . ANSI Bus Bar sizes and quantities
circuit
1
Maximum breaker
services frame
current, (MDS,
amperes MDn,
1
(40 c SbS,
o
ambient) Sbn)
1
800 08
1 1000 10
1200 12
1
1600 16
2000 20
1
2500 25
3200 32
1
4000 40
5000 50
1
6300 1 63
1
6300A only available in Magnum IEC frame
1
60
MaGnuM PRoDuct GuiDe CA013002EN—April 2017
Courtesy of NationalSwitchgear.com
current
correction
1.000
0.998
0.995
0.993
0.990
0.987
0.983
0.980
0.977
0.973
0.970
0.967
0.963
0.960
0.940
Recommended bus bar
quantities and sizes
(in) (mm)
(1) .25x3.0 (2) 5x50
(2) .25x2.0 (2) 5x60
(2) .25x3.0 (2) 5x80
(2) .25x3.0 (2) 5x100
(3) .25x3.0 (3) 5x100
(4) .25x3.0 (4) 5x100
(3) .25x6 (3) 10x100
(4) .25x6 (4) 10x100
(5) .25x6 (5) 10x100
(6) .25x6 (6) 10x100
Table 26 . IEC Bus Bar sizes and quantities
Maximum
service circuit
current, breaker
amperes frame
(40 c (MWn
o
ambient) & MWi)
800 08
1000 10
1250 12
1600 16
2000 20
2500 25
3200 32
4000 40
5000 50
6300 1 63
6300A only available in Magnum IEC frame
1
Example 1
T = Thickness of Bus Bar
W = Width of Bus Bar
Example 2
Illustration of 2.25in by 3in Bus
Bars stacked to carry 1600 amperes
Example 3
Illustration of 2.25mm by 60mm Bus
Bars stacked to carry 800 amperes
www.eaton.com
Recommended bus bar
quantities and sizes
(in) (mm)
(2) 5x50 (1) .25x3.0
(2) 5x60 (2) .25x2.0
(2) 5x80 (2) .25x3.0
(2) 5x100 (2) .25x3.0
(3) 5x100 (3) .25x3.0
(4) 5x100 (4) .25x3.0
(3) 10x100 (3) .25x6
(4) 10x100 (4) .25x6
(5) 10x100 (5) .25x6
(6) 10x100 (6) .25x6
(T)
(0.25 in)
(5 mm)