Siemens SINAMICS G130 Engineering Manual page 128

Fundamental Principles and System Description
Engineering Information
The following tables provide guide values for the theoretically attainable contribution of individual S120 Basic Line
Modules, Smart Line Modules, Active Line Modules and individual S120 Motor Modules to the total peak short-circuit
current I on the DC busbar.
peak short-circuit total
When only a few Line Modules and Motor Modules are connected to the DC busbar, the table values are relatively
precise so that the values stated for individual Line Modules and Motor Modules can simply be added in order to
calculate the total peak short-circuit current. As the number of Line Modules and Motor Modules connected to the DC
busbar increases, the average distance between individual S120 Modules and the short-circuit location – and thus
also the relevant inductance – increases with the result that the total peak short-circuit current decreases. When
calculating the total peak short-circuit current, it is possible to make allowance for this effect by applying the
correction factor k which is dependent on the number of Line Modules and Motor Modules connected to the DC
busbar. The approximate total peak short-circuit current on the DC busbar is therefore
I = k∙[sum of the peak short-circuit currents of all Line Modules and all Motor Modules........
peak short-circuit total
The following applies to factor k:
Number of Line Modules and Motor Modules
o
Number of Line Modules and Motor Modules
o
Number of Line Modules and Motor Modules
o
With parallel connections comprising several S120 Line Modules or several S120 Motor Modules, each component of
the relevant parallel connection must be taken into account individually. In the case of a triple parallel connection of
Line Modules and a triple parallel connection of Motor Modules on one DC busbar, for example, a total of 6 Modules
needs to be included.
Basic Line Modules 380 V to 480 V 3AC
Power Frame size
[ kW ]
200
FB
250
FB
360
FBL
400 FB
560
GB
600
FBL
710 GB
830 GBL
900
GD
Contribution of individual S120 Basic Line Modules to the total short-circuit current on the DC busbar
Smart Line Modules 380 V to 480 V 3AC
Power Frame size
[ kW ]
250
GX
355 GX
500 HX
630
JX
800 JX
Contribution of individual S120 Smart Line Modules to the total short-circuit current on the DC busbar
Active Line Modules 380 V to 480 V 3AC
Power Frame size
[ kW ]
132 FX
160 FX
235
GX
300
GX / GXL
380 HX / HXL
450
HX
500
HX / HXL
630 JX / JXL
800 JX
900
JX / JXL
Contribution of individual S120 Active Line Modules to the total short-circuit current on the DC busbar
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Basic Line Modules 500 V to 690 V 3AC
Peak short-circuit current
[ kA ]
3.3
4.2
6.0
6.7
9.4
10.0
11.9
13.9
15.0
Smart Line Modules 500 V to 690 V 3AC
Peak short-circuit current
[ kA ]
4.2
5.9
8.4
10.5
13.4
Active Line Modules 500 V to 690 V 3AC
Peak short-circuit current
[ kA ]
2.2
2.7
3.9
5.0
6.3
7.5
8.4
10.5
13.4
15.0
........on the DC busbar according to tables]
< 10 k = 1.00
10 - 20 k = 0.75
> 20 k = 0.50
Power Frame size
[ kW ]
250
FB
355
FB/FBL
560
FB
630 FBL
900
GB
1100
GB/GBL
1370 GBL
1500 GD
Power Frame size
[ kW ]
450
GX
710 HX
1000 JX
1400
JX
- -
Power Frame size
[ kW ]
630 HX / HXL
800 JX / JXL
900
HXL
1100
JX / JXL
1400 JX / JXL
1700
JXL
-
-
- -
- -
-
-
Peak short-circuit current
[ kA ]
4.5
6.4
10.1
11.3
16.2
19.8
24.7
27.0
Peak short-circuit current
[ kA ]
8.1
12.8
18.0
25.2
-
Peak short-circuit current
[ kA ]
11.3
14.4
16.2
19.8
25.2
30.6
-
-
-
-