In plants which have strict EMC requirements, line filters work together with line reactors to restrict the conducted interference emanating from the Power Modules to the limit values of Category C2 as defined in EN 61800‑3. Line filters are suited only for direct connection to TN systems.
Optional line filter ranges that are coordinated with the power range are available for the SINAMICS S120 drive system:
These line filters differ with regard to the frequency range in which they reduce the conducted emissions.
Note: According to product standard IEC 61800-3 RI suppression commensurate with the relevant operating conditions must be provided and is a legal requirement in the EU (EMC Directive). Line filters and line reactors are required for this purpose. The use of filters of other makes can lead to limit value violations, resonance, overvoltages and irreparable damage to motors or other equipment. The machine manufacturer must provide verification that the machinery to be operated with the drive products and the installed suppression elements, e.g. line filters, are CE/EMC-compliant before the machines are approved for delivery.
