Line-side power components 
  3.6 Line filters 
SINAMICS S120 Combi 
Manual, 11/2017, 6SL3097-4AV00-0BP7 
39 
 
Damage or fault to other loads when no line reactor is present 
If the SINAMICS line filter is directly connected to the S120 Combi and not connected via 
the associated line reactor, other loads can be damaged or destroyed. 
•  Connect the line filter to the S120 Combi via the associated line reactor. 
•  Connect additional loads upstream of the SINAMICS line filter (if required, via a 
separate line filter). 
 
Damage caused by third party filters 
According to product standard IEC 61800-3, RFI suppression commensurate with the 
relevant rated conditions is required. Line filters and line reactors are required for this 
purpose. 
The use of filters of other makes can lead to limit value violations, resonances, 
overvoltages and irreparable damage to motors or other equipment.  
•  Only use line filters which are listed in this Manual. 
•  The machine manufacturer must provide verification that the machine equipped with the 
drive products and the installed suppression elements, e.g. line filters, is EMC-compliant 
before the machines are placed in the market. 
 
Damage caused by line filters which are not approved for the SINAMICS S120 Combi 
The integrated infeed can be damaged or destroyed when using line filters that have not 
been approved by SIEMENS for the SINAMICS S120 Combi Power Modules. Furthermore, 
line harmonics can occur that damage or destroy loads connected to the same line supply. 
It is not permissible to connect other loads after the line filter. 
•  Only use line filters which have been approved for the SINAMICS S120 Combi. 
 
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voltage test is conducted with alternating voltage in the system, the existing line 
filters must be disconnected in order to obtain acc
urate measurements.