Technical data
47
Protective Devices
Short Circuit Selectivity CKN6-../1N/ towards DII-DIV fuse link
In case of short circuit, there is selectivity between the combined RCD/MCB devices CKN6../1N/ and the upstream fuses up to the specified values of the selec-
tivity limit current I
s
[kA] (i. e. in case of short-circuit currents I
ks
under I
s
, only the MCB will trip, in case of short circuit currents above this value both protec-
tive devices will respond).
*) basically in accordance with EN 60898-1 D.5.2.b
Short circuit selectivity characteristic B towards fuse link DII-DIV*)
CKN6
DII-DIV gL/gG
I
n
[A]1016202535506380100
2 0.5 0.6 1.2 2.5 6.0
2)
6.0
2)
6.0
2)
6.0
2)
6.0
2)
4 <0.5
1)
<0.5
1)
0.5 0.7 1.7 6.0
2)
6.0
2)
6.0
2)
6.0
2)
6 <0.5
1)
0.5 0.7 1.4 3.3 6.0
2)
6.0
2)
6.0
2)
10 0.5 0.7 1.3 2.5 5.7 6.0
2)
6.0
2)
13 0.5 0.7 1.3 2.5 5.0 6.0
2)
6.0
2)
16 0.6 1.3 2.4 4.7 6.0
2)
6.0
2)
20 1.2 2.2 3.0 6.0
2)
6.0
2)
25 1.1 2.0 3.8 5.8 6.0
2)
32 1.8 3.4 4.8 6.0
2)
40 2.8 4.2 6.0
2)
Short Circuit Selectivity CKN6-../1N/ towards D01-D03 fuse link
In case of short circuit, there is selectivity between the combined RCD/MCB devices CKN6../1N/ and the upstream fuses up to the specified values of the selec-
tivity limit current I
s
[kA] (i. e. in case of short-circuit currents I
ks
under I
s
, only the MCB will trip, in case of short circuit currents above this value both protec-
tive devices will respond).
*) basically in accordance with EN 60898-1 D.5.2.b
Short circuit selectivity characteristic B towards fuse link D01-D03*)
CKN6
D01-D03 gL/gG
I
n
[A]1016202535506380100
2 <0.5
1)
0.6 1.1 1.9 4.5 6.0
2)
6.0
2)
6.0
2)
6.0
2)
4 <0.5
1)
<0.5
1)
0.5 0.6 1.2 6.0
2)
6.0
2)
6.0
2)
6.0
2)
6 <0.5
1)
<0.5
1)
0.6 1.2 3.2 6.0
2)
6.0
2)
6.0
2)
10 <0.5
1)
0.6 1.2 2.7 4.3 6.0
2)
6.0
2)
13 <0.5
1)
0.6 1.1 2.5 4.0 5.5 6.0
2)
16 0.6 1.1 2.4 3.6 5.0 6.0
2)
20 1.0 2.2 3.3 4.7 6.0
2)
25 1.0 2.0 3.0 4.2 6.0
2)
32 1.9 2.7 3.7 6.0
2)
40 2.5 3.3 6.0
2)
Short circuit selectivity characteristic C towards fuse link D01-D03*)
CKN6
D01-D03 gL/gG
I
n
[A] 10 16 20 25 35 50 63 80 100
2 <0.5
1)
0.5 0.8 1.4 3.3 6.0
2)
6.0
2)
6.0
2)
6.0
2)
4 <0.5
1)
<0.5
1)
0.5 0.7 1.4 6.0
2)
6.0
2)
6.0
2)
6.0
2)
6 <0.5
1)
<0.5
1)
0.6 1.2 3.0 6.0
2)
6.0
2)
6.0
2)
10 0.5 1.0 2.0 3.3 5.5 6.0
2)
13 1.0 1.9 3.0 4.5 6.0
2)
16 0.9 1.7 2.6 3.8 6.0
2)
20 0.9 1.7 2.5 3.7 6.0
2)
25 1.6 2.3 3.1 6.0
2)
32 2.1 2.8 6.0
2)
40 2.6 5.5
1)
Selectivity limit current I
s
under 0.5 kA
2)
Selectivity limit current I
s
= rated breaking capacity I
cn
of the RCD/MCB device
Darker areas: no selectivity