Eaton Industrial Switchgear - XEnergy XPole Energy distribution, switching and protection

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IZM circuit-breakers, IN switch-disconnectors
IZM26 tripping characteristics
2010 CA08103002Z-EN
18/79
IZM26…V(U)... Tripping characteristics for selectivity protection and universal protection
Overload protection (L) and short-time delayed short-circuit protection (S)
L-Protection: I2t characteristic curve and S protection: flat characteristic curve
See Notes 1, 3, 4, 6, 7, 8, 9, 10.
S protection: I2t characteristic curve
See Notes 1, 3, 4, 6, 7, 8, 9, 10.
K Set values for ground fault protection
A Set values for overload protection
B Maximum total opening delay
C Minimum total opening delay
D Set values for long delay
G The end of the characteristic curve is determined by the type of application
and the switching capacity of the selected switch.
H The characteristic curve for the overload release can extend up
to the M1 set value.
I Available set values for short-time delayed short-circuit protection Isd
J Short-circuit release for very high currents
5 4 36 7 8 9 10 20 30 40 50 60 100 0.5 0.7 0.9 2
1 min
0.6 0.8 1
I/Ir
t[s]
0.01
2
5
6
7
8
9
10
20
30
40
50
60
7080
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
0.070.08
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
A 0.4 - 1 x In = Ir
( 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0)
B
C
D
tr @ 6 x Ir
(2, 4, 7, 10, 12, 15,
20, 24 s + 0/- 30 )
I
2 - 10 xI r
g 5
J
(0.1 - 0.5 s)
G
1230DIA-105 (70C1006)
f
j
h
dc
4
7
24
15
2
0.2
0.1
0.3
0.4
0.5
b
H
K
0.1 , 0.3 ,
0.5 s
b c
0.1
0.3
0.5
5 4 36 7 8 9 10 20 30 40 50 60 80 100 2
I/Ir
1230DIA-106 (70C1006)
t[s]
2
5
0.02
0.01
0.03
0.04
0.05
0.06
0.070.08
0.09
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3
4
IZM26…V(U)…