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18/80 IZM circuit-breakers, IN switch-disconnectors
IZM26 tripping characteristics
2010 CA08103002Z-EN
www.eaton.comIZM26…V(U)... Tripping characteristics for selectivity protection and universal protection
Non-delayed short-circuit protection (I)
I-protection: Adjustable
See Notes 4, 5, 6, 7, 11, 12.
I-protection: For high short-circuit currents
See Notes 4, 5, 6, 7, 11, 12.
F Set values for short-time delayed short-circuit protection with flat
characteristic curve
G The end of the characteristic curve is determined by the type of application
and the switching capacity of the selected switch.
E Set values for short-time delayed short-circuit protection
IZM26…V(U)... Option ground-fault protection +IZM-DTV(U)-E…
G: Ground fault protection, flat characteristic curve
See Notes 4, 6, 13, 14, 15, 16, 17.
G: Ground fault protection, I
2
t-Characteristic curve
See Notes 4, 6, 13, 14, 15, 16, 17.
O I
2
t characteristic for ground-fault protection delay time
P Set values for ground-fault protection delay with I
2
t characteristic
L Set values for ground-fault protection
M Set values for ground-fault protection delay at flat characteristic curve
N Flat characteristic curve for the delay time fault protection
5 4 3
6 7 8 9 10
20 30 40 50 60 80 100
0.5 0.7 0.9
2
0.6 0.8 1
I/I
n
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
1230DIA-107 (70C1007)
d
h
j
b
f c
E
2 - 10 x I
n
g
10
t
[s]
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
50 40 30
60
70
80
90
100
200 300 400 600 800 1000
20
I
RMS
kA
G
F
1230DIA-108 (70C1007)
0.25
0.5
0.5
0.35
0.75
1.0
1230DIA-109 (70C1008)
0.2
0.1
0.3
0.4
0.5
0.2 0.3 0.4
0.7 0.5
2
5 4 3
8 9 76
0.05 0.07 0.09
0.06 0.08 0.1
0.6 0.8 1
0.9
t
[s]
0.01
2
5
6
7
8
9
10
20
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
M
0.1 - 0.5 s
N
L
0.25 - 1.0 x I
n
g
10
I/I
n
0.3
0.25
0.4
0.6
0.1
0.3
0.5
0.2 0.3 0.4 0.5 0.7 0.9
2 3 4 5 6 7 8 910
0.6 0.8 1
t
[s]
0.01
2
5
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
P
O
1230DIA-110 (70C1008)
I/I
n
IZM26...(V)(U)...