Eaton IZM32 Instruction Manual page 41

IIZM32/IZM63...V(P)...PXR20/25 Instantaneous(I) Curves
Instantaneous Trip at High Fault Currents
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
900
800
700
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
.9
.8
.7
.6
.5
.4
.3
.2
.1
.09
.08
.07
.06
.05
.04
.03
.02
.01
Notes:
1. Fixed High Instantaneous Trip function is provided in the circuit breaker for Series IZM32 set to pickup at 90kA.
Instantaneous peak current level. The tolerance is 100% ±10% as the pickup points.
2. The peak current level setting for IZM63 is fixed at 176kA.
3. This protection is functional even when the Instantaneous is set to the OFF position.
4. The PXR will light the Instantaneous LED for a High Instantaneous trip.
5. The total Instantaneous clearing times shown are conservative and consider the maximum response times of the trip unit, the circuit breaker opening,
and the interruption of the current under factors that contribute to worst case conditions, like:
90kA
Instantaneous Asymmetrical Peak Current (kA)
IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
Section 5: Protective characteristic curves
176kA
37