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19/56 Circuit-breakers, fuses
Tripping characteristics for miniature circuit-breakers
2010 CA08103002Z-EN
Trippingcharacteristics forminiaturecircuit-breakers
Residual-current devices
FI-…-B
Frequency response of the tripping current
30 mA
100 mA 300 mA
Miniature circuit-breakers (MCB)
FAZ...
Tripping characteristics at 30 °C: Tripping characteristics at 30 °C:
B, C, D to IEC/EN 60898 K according to IEC/EN 60947
10 1
10
100
1000
10000
100 1000 10000 100000 1000000
30 mA
[mA]
[Hz]
Fault current
Frequency
10 1
10
100
1000
10000
100 1000 10000 100000 1000000
100 mA
[mA]
[Hz]
Fault current
Frequency
10 1
10
100
1000
10000
100 1000 10000 100000 1000000
300 mA
[mA]
[Hz]
Fault current
Frequency
0.0005
1 2 3 4 5 6 7 8 9 10 15 20 30 40 50
0.001
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
10
t [s]
30
60
120
300
600
1200
3600
7200 1.131.45
B C D
1
2
5
b
g
a
a
c
d
e
f
X rated current
Specified non-tripping current
I nt = 1.13 X Infor t > 1 h
Specified tripping current
I
t = 1.45X I
n for t < 1 h
a 2.55 X In : t = 1 – 60 s (I n< 32 A)
t = 1 – 120 s (In > 32 A)
b Type B: 3X In : t > 0.1 s
c Type B: 5X In : t < 0.1 s
d Type C: 5 X I
n: t > 0.1 s
e Type C: 10 X In: t < 0.1 s
f Type D: 10 X In: t > 0.1 s
g Type D: 20 X In: t < 0.1 s
0.0005
1 2 3 4 5 6 7 8 9 10 15 20 30 40 50
0.001
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
t[s]
30
60
120
300
600
1200
3600
7200 1.051.30
Specified
non-tripping current
nt = 1.05x n
for t > 1 h
Specified
tripping current
t= 1.30 x n
for t < 1 h
I
I
I
I
x rated current
FAZ, FI