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IZM32 / IN32 low voltage air circuit breaker
MN013017EN May 2022 www.eaton.com
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
Derating factors
IZM32 / IN32 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 IZM32 / IN32 resistance and power consumption data table, calculated to IE (890) temperatures.
Altitude derating factors
Notes
IZM series circuit 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 table.
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
IZM32B3-..08
15
33
40
85
IZM32N3-..08
12
24
35
70
IZM32H3-..08
12
24
30
60
IZM32B3-..10
15
33
60
130
IZM32N3-..10
12
24
50
95
IZM32H3-..10
12
24
50
95
IZM32B3-..12
15
33
90
200
IZM32N3-..12
12
24
70
140
IZM32H3-..12
12
24
70
140
IZM32B3-..16
15
33
150
330
IZM32N3-..16
12
24
120
240
IZM32H3-..16
12
24
120
240
IZM32B3-..20
12
24
190
330
IZM32N3-..20
12
24
190
380
IZM32H3-..20
12
24
190
380
IZM32B3-..25
8
20
200
500
IZM32N3-..25
8
20
200
500
IZM32H3-..25
8
20
200
500
IZM32B3-..32
8
20
320
800
IZM32N3-..32
8
20
320
800
IZM32H3-..32
8
20
320
800
Based on RAC/RDC = 1.30, the total loss is under the full rated current.
IZM32 / IN32 resistance and power consumption data
