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Where the line choke is installed ? When To Use a Line choke ?

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,

·         overvoltages)

·         Line supply with voltage imbalance between phases above 1.8% of the nominal

·         voltage

·         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

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