Technical data
IZMX circuit-breakers, INX switch-disconnectors
Tripping characteristics
CA01305001Z-EN www.eaton.com
59
IZMX16(40)…V(U)… Tripping characteristics for selectivity protection and universal protection
Overload protection (L) and short-time delayed short-circuit protection (S)
L-Protection: I
2
t-Characteristic curve and S-Protection: flat characteristic
curve
S-Protection with: I
2
t-Characteristic curve ON
See Notes 1, 2, 3, 4, 6, 7 ￫ page 62. See Notes 1 to 7 ￫ page 62.
A Set values for overload protection
B Maximum total opening delay
C Minimum total opening delay
D Set values for long delay
E Set value for delayed short-circuit protection I
SD
F Set values for short-time delayed short-circuit protection
G The end of the characteristic curve is determined by the type of application
and the switching capacity of the selected switch.
543
6
7
8
9
10
20
30
40 50 60
80
100
0.5 0.7 0.9 2
1 min
0.6 0.8 1
I/I
r
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
4
7
24
15
2
0.2
0.1
0.3
0.4
0.5
A
0.5 - 1 x I
n
= I
r
(0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 0.95, 1.0)
B
C
D
t
r
@ 6 x I
r
(2, 4, 7, 10, 12, 15,
20, 24 s + 0/- 30 )
E
(I
sd
: 2 - 10 x
I
r
g
10 )
F
(0.1 - 0.5 s)
f
j
h
e
d
b
c
G
1230DIA-67 (5722B19)
0.1
0.3
0.5
543
6
7
8
9
10
20
30
40 50 60
80
100
21
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
0.1 , 0.3 ,
0.5 s
b
c
I/I
r
1230DIA-96 (5722B19)
IZMX16(40)…V(U)…