Eaton IZM32 Instruction Manual page 17

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
Altitude (m) Voltage
correction
2000 1.000
2150 0.989
2300 0.976
2450 0.963
2600 0.950
2750 0.933
2900 0.917
3050 0.900
3200 0.883
3350 0.867
3500 0.850
3650 0.833
3800 0.817
3950 0.800
5000 0.700
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.
IZM32 / IN32 resistance and power consumption data
Current Breaker frame
correction
1.000
IZM32B3-..08
0.998
IZM32N3-..08
0.995
IZM32H3-..08
0.993
IZM32B3-..10
0.990
IZM32N3-..10
0.987
IZM32H3-..10
0.983
IZM32B3-..12
0.980
IZM32N3-..12
0.977
IZM32H3-..12
0.973
IZM32B3-..16
0.970
IZM32N3-..16
0.967
IZM32H3-..16
0.963
IZM32B3-..20
0.960
IZM32N3-..20
0.940
IZM32H3-..20
IZM32B3-..25
IZM32N3-..25
IZM32H3-..25
IZM32B3-..32
IZM32N3-..32
IZM32H3-..32
Based on RAC/RDC = 1.30, the total loss is under the full rated current.
IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
Section 2: Receiving, handling, and installation
RDC RDC
(mW/pole) (mW/pole)
Fixed type Drawout type
15 33
12 24
12 24
15 33
12 24
12 24
15 33
12 24
12 24
15 33
12 24
12 24
12 24
12 24
12 24
8 20
8 20
8 20
8 20
8 20
8 20
AC watt loss AC watt loss
(3 pole sum) (3 pole sum)
Fixed type Drawout type
40 85
35 70
30 60
60 130
50 95
50 95
90 200
70 140
70 140
150 330
120 240
120 240
190 330
190 380
190 380
200 500
200 500
200 500
320 800
320 800
320 800
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