This line choke is an option for variable speed drives of Altivar range.Its rated current is equal to 31A.It provides improved protection against overvoltages on the line supply and contributes to reduce harmonic distortion of the current produced by the drive.Its protection index is IP00.It has an inductance value of 1mH.It weighs 6kg and its dimensions are, 155mm wide, 170mm high, 135mm deep.Its use is particularly recommended in case of close connection of several drives in parallel, line supply with significant disturbance from other equipment (interference, overvoltages), line supply with voltage imbalance between phases.