The use of line reactors is optional for 3-phase line filters. This reduces the voltage distortions (THD) in the mains and increases the service life of the servo amplifier. Similar to line filters, several servo amplifiers can be connected to one line reactor.
It is imperative that the servo amplifier is connected via a line reactor in the following situations:
if the servo amplifier is used in applications with transient disturbances corresponding to environment class 3, to EN 61000-2-4 and above (harsh industrial environments).
for compliance with EN 61800-3 resp. IEC 61800-3