Eaton IZM32 - Section 5: Protective Characteristic Curves

34 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
Section 5: Protective characteristic curves
Section 5: Protective Characteristic Curves
Notes:
1. Short slope: Flat, the actual pickup point has 100% ±10% tolerance.
2. Long delay I²
r
.
.1 .2 .3 .4 .5 .6 .7 .8 .9
.01
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
2
3 4 5
6 7 8 9
10 20 30 40 50 60
70 80 90
100
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
24
0.5
1
2
4
7
15
0.5
1.5
7
6
5
4
3
2.5
2
8
10
0.4
0
0.1
0.2
0.3
Time in Seconds
Current in Multiples of Long Delay Pickup (I
r
)
IZM32...V(P)...PXR20/25 Long Delay(L) and Short Delay(S) Curves
L-Protection: I²t-Characteristic curve and S-Protection: Flat characteristic curve