Eaton IZM32 Instruction Manual page 43

IZM32/IZM63...V(P)...PXR20/25 Ground(G) Curves
G: Ground fault protection-I²t-Characteristic curve ON
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
0.2
3
2
1
.9
.8
.7
.6
.5
.4
.3
.2
.1
.09
.08
.07
.06
.05
.04
.03
.02
.01
Notes:
1. Ground PU setting from 0.2 to 1.0 of I
2. Beak points at 0.625 x I
n
3. Ground I²T time from 0.1s to 0.5s, with 0.1s increments.
4. Ground slope: Flat, trip time tolerance is +0 / -80ms for all settings except 0.1s setting is 0.06s to 0.1s.
Ground slope: I²T , tolerance is
0.1s, 0.2s : +0 / -40%
0.3s, 0.4s, 0.5s : +0 / -30%
5. The curve is shown as a multiple of the Current Rating (I
6. The end of the curve is determined by the interrupting rating of the circuit breaker.
7. Curves applies from -20 °C to +50°C ambient. Temperatures above +85 °C will cause over temperature trip.
8. This curve is for 50Hz ,60Hz applications.
9. These curves are comprehensive for series IZM32/IZM63 circuit breakers including all frame sizes, ratings, and constructions.
The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current.
0.8
0.4 0.6 1.0
0.5
0.4
0.3
0.2
0.1
Current in Multiples of Rating (I
with steps of 0.2 , have tolerance of 100%± 10%.
n
).
n
IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
Section 5: Protective characteristic curves
)
n
39