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New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 2: Receiving, handling, and installation
Altitude (m)
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
Breaker frame
RDC
(mW/pole)
Fixed type
RDC
(mW/pole)
Drawout type
AC watt loss
(3 pole sum)
Fixed type
AC watt loss
(3 pole sum)
Drawout type
IZM97B3C-08
15
33
40
85
IZM97N3C-08
12
24
35
70
IZM97H3C-08
12
24
30
60
IZM97B3C-10
15
33
60
130
IZM97N3C-10
12
24
50
95
IZM97H3C-10
12
24
50
95
IZM97B3C-12
15
33
90
200
IZM97N3C-12
12
24
70
140
IZM97H3C-12
12
24
70
140
IZM97B3C-16
15
33
150
330
IZM97N3C-16
12
24
120
240
IZM97H3C-16
12
24
120
240
IZM97B3C-20
12
24
190
330
IZM97N3C-20
12
24
190
380
IZM97H3C-20
12
24
190
380
IZM97B3C-25
8
20
200
500
IZM97N3C-25
8
20
200
500
IZM97H3C-25
8
20
200
500
IZM97B3C-32
8
20
320
800
IZM97N3C-32
8
20
320
800
IZM97H3C-32
8
20
320
800
IZM99N3C-40
6
12
380
750
IZM99H3C-40
6
12
380
750
IZM99N3C-50
4
10
400
1000
IZM99H3C-50
4
10
400
1000
IZM99N3C-63
4
10
620
1550
IZM99H3C-63
4
10
620
1550
Based on RAC/RDC = 1.30, the total loss is under the full rated current.
Derating factors
IZM9 circuit breakers can be applied at their full voltage and current ratings up to a maximum attitude of 2000 meters above
sea level. When installed at higher attitudes, the ratings are subject to correction factors. Rated short-circuit current is not
affected as long as the voltage is rated in accordance with the table below.
Power consumption data
It is recommended to use IZM9 resistance and power consumption data table, calculated to IE (890) temperatures.
Altitude derating factors
IZM97,99 resistance and power consumption data