To adhere to the radio interference thresholds according to specialist basic
standard EN 50081-2 or product standard EN 61800-3, filter modules must be used
for the drive control. These filter modules are used only for the purpose of filtering
the interference sizes generated by the converter. Therefore, they cannot be used
for the interference suppression of other consumers of a system.
Apart from the reduction of the radio interference voltage in the required frequency
range 150 kHz to 30 Mhz, these filter modules additionally reduce for the controlled
mains feed the grid-bound interference sizes in the frequency range below 150 kHz
(reduction of mains feedback).
Filter assembly in the control cabinet
With system-specific filters, the assembly occurs according to the type of
construction and corresponding to the assembly regulations in the
Assembly on metal plate with extensive, good conductive contacting.
Painted control cabinet walls, hat rails or similar assembly aids with a small
contact surface and low potential link are not suitable for the assembly of the
converter and filter.
Wiring measures for interference suppression
EMC Installation Guideline – Planning Guide (EMV) – 03.2004 Edition
© Siemens AG, 2004. All rights reserved