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17/144 Circuit-breakers, switch-disconnectors
Selectivity: incoming circuit-breaker, outgoing circuit-breaker
2010 CA08103002Z-EN
www.eaton.comEngineering
Incoming circuit-breaker
Outgoing circuit-breaker
Selectivity 415 V AC
between circuit-breakers enables separate shut-down of faulty system sections.
Selectivity (discrimination) exists between incoming circuit-breaker 1 and outgoing circuit-breaker 2 if,
only
outgoing breaker 2 trips at position 2 during a short-circuit.
System sections 3 and 4 continue to operate.
Incoming circuit-breaker (S1)
NZM...1-A...
NZM...2-A...
I
cu
[kA]
25(36)(50)(100)
25(36)(50)(150)
I
n
[A]
20-40 50 63 80 100 125 160 20-40 50 63 80 100 125 160 200 250 300
Outgoing circuit-
breaker (S2)
I
n
[A]
I
cu(415V)
[kA]
Selectivity threshold
I
s
[kA] for selectivity between S2 and S1, overload and short-circuit release set to max. value
FAZ–B(C)
0.5
15
T
T T T T T T
T
T T T T T T T T T
1
15
T
T T T T T T
T
T T T T T T T T T
2
15
2
T T T T T T
3
T T T T T T T T T
3
15
1.2 2 3 3 10 T T
1.5 1.5 3 5 T T T T T T
4
15
1.2 2 3 3 8 T T
1.2 1.5 3 4 T T T T T T
6
15
1.2 2 2.5 3 5 10 10 1.2 1.5 2.5 3 T T T T T T
10
15
1.2 1.5 2 2 4 10 10 1
1.5 2.5 3 10 10 10 10 10 10
13
15
1
1.5 2 2 4 10 10 1
1.2 2 3 10 10 10 10 10 10
16
15
1
1.2 1.5 2 3 8 8
1
1.2 1.5 2.5 10 10 10 10 10 10
20
15
0.8 1.2 1.5 1.5 3 8 8
1
1.2 1.5 2.5 10 10 10 10 10 10
25
15
0.7 1.2 1.5 1.5 3 7 7
0.8 1 1.5 2 10 10 10 10 10 10
32
15
–
1.2 1 1.5 2 6 6
–
1 1.5 2 8 8 8 8 10 10
40
15
–
– 1 1.5 2 5 5
–
– 1.2 1.5 7 7 7 7 10 10
50
15
–
– – 1.2 1.5 4 4
–
– – 1.5 6 6 6 6 10 10
63
15
–
– – – 1.5 3 3
–
– – – 6 6 6 6 10 10
PKZM0-...
0.16
100
T
T T T T T T
T
T T T T T T T T T
0.25
100
T
T T T T T T
T
T T T T T T T T T
0.4
100
T
T T T T T T
T
T T T T T T T T T
0.63
100
T
T T T T T T
T
T T T T T T T T T
1
100
T
T T T T T T
T
T T T T T T T T T
1.6
100
T
T T T T T T
T
T T T T T T T T T
2.5
100
T
T T T T T T
T
T T T T T T T T T
4
100
T
T T T T T T
T
T T T T T T T T T
6.3
100
4
5 5 T T T T
2
3 4 5 T T T T T T
10
100
3
4 5 6 25 T T
1.5 2.5 4 4 T T T T T T
12
50
3
4 5 6 25 T T
1.5 2.5 4 4 T T T T T T
16
50
1.5 1.5 2 3 5 7 T
1
1.6 2 2.5 T T T T T T
20
50
0.8 1.5 1.5 2 3 5 T
0.8 1.2 1.5 2 T T T T T T
25
50
–
1 1.5 1.5 2.5 4 T
–
1 1.5 2 10 T T T T T
32
50
–
– 1 1 2 3.5 T
–
– 1 1.5 8 40 T T T T
PKZ2/ZM-...
0.6
100
T
T T T T T T
T
T T T T T T T T T
1.0
100
T
T T T T T T
T
T T T T T T T T T
1.6
100
T
T T T T T T
T
T T T T T T T T T
2.4
100
1.2 2 2.5 10 T T T
1.2 2 2.5 10 T T T T T T
4
100
1
1.5 2 2.5 2.5 4 10 1
1.5 2 2.5 2.5 10 10 10 T T
6
100
0.6 0.8 1 1.2 2 3 8
0.6 0.8 1 1.2 2 8 8 8 10 10
10
100
0.5 0.7 0.8 1 1.2 2 4
0.5 0.7 0.8 1 1.2 4 4 4 5 5
16
100
0.5 0.6 0.7 0.8 1.2 1.5 3
0.5 0.6 0.7 0.8 1.2 3 3 3 4 4
25
30
–
0.6 0.7 0.7 1.2 1.5 2
–
0.6 0.7 0.7 1.2 2 2 2 3 3
32
30
–
– 0.6 0.7 1.2 1.5 2
–
– 0.6 0.7 1.2 2 2 2 3 3
40
30
–
– 0.6 0.7 1 1.5 2
–
– 0.6 0.7 1 2 2 2 2 2
PKZM4
16
100
0.5 0.8 0.8 0.8 2 5 5
0.5 0.8 0.8 0.8 2 5 5 5 5 5
25
100
–
0.7 0.8 0.8 1.5 5 5
–
0.7 0.8 0.8 1.5 5 5 5 5 5
32
50
–
– 0.8 0.8 1.5 4 4
–
– 0.8 0.8 1.5 4 4 4 4 4
40
50
–
– – 0.8 1.5 3 3
–
– – 0.8 1.5 3 3 3 3 3
50
50
–
– – – 1 2.5 2.5 –
– – – 1 2.5 2.5 2.5 2.5 2.5
58
50
–
– – – – 2.5 2.5 –
– – – – 2.5 2.5 2.5 2.5 2.5
63
50
–
– – – – 2 2
–
– – – – 2 2 2 2 2
Notes
T: total selectivity
2
1
3 4
NZM, FAZ-B(C), PKZ