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Circuit-breakers, switch-disconnectors
Construction size 4: tripping characteristics
2010 CA08103002Z-EN
www.eaton.com17/157
Construction size 4: trippingcharacteristics
System and line protection with NZM4
Systems, cable, selectivity and generator protection with NZM4
Systems, cable, selectivity and generator protection with NZM4
Motor protection with NZM4
Notes
With the free CurveSelect software you can quickly and easily create detailed representations of individual settings:
www.moeller.net,Products & Solutions > Power Distribution > Switching and Protecting Power Distribution > CurveSelect: Characteristics program
Tripping time [s]
Characteristics for I
r
= 1,0 x I
n
1
0.001
0.002
0.004
0.006
0.008
0.01
0.02
0.04
0.06
0.08
0.1
0.2
0.4
0.6
0.8
1
2
4
6
8
10
20
40
60
600
80
100
6000
2.5 h
200
400
800
1000
2000
4000
8000
(10 min)
(1 min)
65 4 3
2
7 8 10 12x In
I
i
=
2
3 4 5 6 7 8 910 15 20 30 40 50 60 70 80
100
x I
r
NZM4(-4)-AE...
Tripping time [s]
Characteristics for I
r
= 1,0 x I
n
without “I
2
t = constant” function
NZM4(-4)-VE(F)...
1000
750
500
300
200
100
60
20
65 4
2
3
7 8 9 10
0
x I
r
I
sd
=
65 4
2
3
7 8 10 12 x I
n
I
i
=
t
sd
[ms]
20
t
r
[s]
17
14
10
6
8
4
2
2
3 4 5 6 7 8 910 15 20 30 40 50 60 70 80 100
x I
r
1
0.001
0.002
0.004
0.006
0.008
0.01
0.02
0.04
0.06
0.08
0.1
0.2
0.4
0.6
0.8
1
2
4
6
8
10
20
40
60
600
80
100
6000
2.5 h
200
400
800
1000
2000
4000
8000
(10 min)
(1 min)
Tripping time [s]
Characteristics for I
r
= 1,0 x I
n
I
2
t = constant
65 4
2
3
7 8 9 10
2
3 4 5 6 7 8 910 15 20 30 40 50 60 70 80 100
I
sd
=
t
sd
[ms] = 20............1000
65 4
2
3
7 8 10 12 x I
n
x I
r
I
i
=
20
t
r
[s]
17
14
10
6
8
4
2
x I
r
1
0.001
0.002
0.004
0.006
0.008
0.01
0.02
0.04
0.06
0.08
0.1
0.2
0.4
0.6
0.8
1
2
4
6
8
10
20
40
60
600
80
100
6000
2.5 h
200
400
800
1000
2000
4000
8000
(10 min)
(1 min)
NZM4(-4)-VE...
Characteristics for I
r
= 1,0 x I
n
Tripping time [s]
2
3 4 5 6 8 10 12 14
I
i
=
x I
r
20
t
r
[s]
17
14
10
6
8
4
2
NZM4-ME...
2
3 4 5 6 7 8 910 15 20 30 40 50 60 70 80 100
x I
r
1
0.001
0.002
0.004
0.006
0.008
0.01
0.02
0.06
0.04
0.08
0.1
0.2
0.4
0.6
0.8
1
2
4
6
8
10
20
40
60
600
80
100
6000
2.5 h
200
400
800
1000
2000
4000
8000
(10 min)
(1 min)
NZM4