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Line chokes should be installed upstream of the drive.
The use of line chokes is recommended in particular under the following
· Close connection of several drives in parallel
· Line supply with signifi cant disturbance from other equipment (interference,
· Line supply with voltage imbalance between phases above 1.8% of the nominal
· Drive supplied by a line with very low impedance (in the vicinity of power
· transformers 10 times more powerful than the drive rating)
· Installation of a large number of frequency inverters on the same line
· Reducing overloads on the cos ϕ correction capacitors, if the installation includes