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18/82 IZM circuit-breakers, IN switch-disconnectors
IZM26 tripping characteristics
2010 CA08103002Z-EN
www.eaton.comIZM26…P... Tripping characteristics for universal protection with power measurement
Overload protection (L) and short-time delayed short-circuit protection (S)
L-Protection: I
2
t characteristic curve and S protection: flat characteristic curve
See Notes 1, 3, 7, 9, 22, 23, 24, 25, 26.
S protection: I
2
t characteristic curve
See Notes 1, 3, 7, 9, 22, 23, 24, 25, 26.
B Maximum total opening delay
C Minimum total opening delay
K Set values for ground fault protection
R Characteristic curve turning point
A Set values for overload protection
B Maximum total opening delay
C Minimum total opening delay
D Set values for long delay
I
Available set values for short-time delayed short-circuit protection I
sd
J Short-circuit release for very high currents
5 4 3
6 7 8 9 10
20 30 40 50 6070
0.7
0.5
0.9
2
0.6 0.8 1
I/I
r
1 min
t
[s]
0.01
2
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
2000
3000
4000
5000
6000
7000
8000
9000
10000
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
2 h
1 h
I
J
0.1 - 0.5 s
(0.10,0.15,0.20, ...,
0.40,0.45,0.50)
0.50
C
2
4
10
24
D
t
r
@ 6 x I
r
2 - 24 s
g
30
(2.0, 2.5, 3.0, ..., 23.0, 23.5, 24.0)
B
A
0.4 - 1.0 x I
n
= I
r
(0.40, 0.45, 0.50, ..., 0.90, 0.95, 1.00)
1230DIA-112 (70C1034)
1.5 - 10 x I
r
(1.5,2.0,2.5, ...,
9.0,9.5,10.0),
12/14 x I
r
t
[s]
0.01
2
5
6
7
8
9
10
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
5 4 3
6 7 8 9 10
20 30 40 50 60 80 100
2
I/I
r
0.50
0.10
R
B
C
K
0.1 - 0.5 s
(0.10, 0.15, 0.20, ...,
0.40, 0.45, 0.50)
1230DIA-113 (70C1034)
IZM26...P...