Siemens SINAMICS G130 Engineering Manual page 293

Precharging on a SINAMICS G130 converter Chassis unit using a separate precharging rectifier and precharging resistors
This precharging principle involves the use of ohmic resistors R
resistors are dimensioned thermally to precharge the DC link of the G130 converter without themselves becoming
overloaded. They are not capable of precharging any additional DC link capacitance. For this reason, it is not
permissible to connect further S120 Motor Modules to the DC link of a SINAMICS G130 converter, or to interconnect
multiple G130 converters via the same DC link.
The following table specifies the rms values of the line currents which occur at the beginning of the precharging
process in the case of line supply voltages 400 V / 500 V / 690 V. Where other line voltage values apply, the line
current values must be converted in proportion to the line voltage.
The precharging currents decay in accordance with an e-function until the precharging process is completed after a
period of typically 1 to 2 s. Due to the temperature rise in the precharging resistors during the process, the minimum
permissible interval for complete precharging of the DC link is 3 minutes.
Rated power of G130
at 400 V / 500 V / 690 V
380 V – 480 V 3AC
110 kW
132 kW
160 kW
200 kW
250 kW
315 kW
400 kW
450 kW
560 kW
500 V – 600 V 3AC
110 kW
132 kW
160 kW
200 kW
250 kW
315 kW
400 kW
500 kW
560 kW
660 V – 690 V 3AC
75 kW
90 kW
110 kW
132 kW
160 kW
200 kW
250 kW
315 kW
400 kW
450 kW
560 kW
710 kW
800 kW
SINAMICS G130 converter Chassis units: Line currents at the beginning of precharging (initial rms values)
Rated output Line current at the beginning of DC link
current precharging (initial rms value)
210 A
260 A
310 A
380 A
490 A
605 A
745 A
840 A
985 A
175 A
215 A
260 A
330 A
410 A
465 A
575 A
735 A
810 A
85 A
100 A
120 A
150 A
175 A
215 A
260 A
330 A
410 A
465 A
575 A
735 A
810 A
and is therefore subject to losses. The precharging
p
at 400 V / 500 V / 690 V
5 A
6 A
6 A
8 A
13 A
13 A
13 A
13 A
17 A
4 A
5 A
5 A
8 A
10 A
10 A
13 A
15 A
15 A
4 A
4 A
4 A
4 A
5 A
7 A
7 A
11 A
15 A
15 A
17 A
21 A
21 A
SINAMICS Engineering Manual – November 2015
SINAMICS G130
Engineering Information
293/528
Ó Siemens AG