100 / 582
BETA Protecting
Miniature Circuit Breakers
Configuration
1/78
Siemens ET B1 · 10/2008
1
*
You can order this quantity or a multiple thereof.
Back-up protection miniature circuit breakers/circuit breakers
If miniature circuit breakers are installed in fuseless distribution
boards, circuit breakers according to IEC/EN 60947-2 or
DIN VDE 0660-101 must be used as back-up protection.
The following tables show the short-circuit currents – in kA – up
to which back-up protection is guaranteed when using circuit
breakers.
Limit values of back-up protection miniature circuit breakers/circuit breakers in kA
Downstream miniature
circuit breakers
Upstream circuit breakers
3
VL1
Non-adjustable
3
VL2
Adjustable
I
n
[
A] 16 20 25 32 40 50 63 80 100 125 160 50 63 80 100 125 160
I
>[A] 160 200 250 320 400 500 630 800 1000 1250 1600 400 500 630 800 1000 1280
I
cu
[
kA] 40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/
70
40/70/
100
40/70/
100
40/70/
100
40/70/
100
40/70/
100
40/70/
100
I
n
[
A]
I
cn
[
kA]
Back-up protection up to kA
5
SY6
Characteristic B 0.3 ... 6
6 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35
Characteristic C 8 ... 32
6 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25
Characteristic D 40 ... 63 6 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
5
SY4
Characteristic A 0.3 ... 6 10 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
Characteristic B 8 ... 32 10 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30
Characteristic C 40 ... 63 10 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25
Characteristic D
5
SY7
Characteristic B 0.3 ... 2 15 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
Characteristic C 3 ... 10 15 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45
13 ... 32 15 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
40 ... 63 15 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35
Characteristic D 0.3 ... 2 15 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
3 ... 10 15 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45
13 ... 32 15 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
40
15 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35
50 ... 63 15 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30
5
SY8
Characteristic C 0.3 ... 2 25 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70
3 ... 6
25 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
8 ... 32 25 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45
40 ... 63 25 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
Characteristic D 0.3 ... 2 25 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70
3 ... 6
25 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
8 ... 32 25 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45
40
25 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
50 ... 63 25 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35
5
SP4
Characteristic B 80 ... 125 10 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25
Characteristic C
Characteristic D 80 ... 100 10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
© Siemens AG 2008