This motor choke is an option for variable speed drives of Altivar 61 / Altivar 71 range. Its rated current is equal to 90A. It is used as an output filter (between drive output and motor) and enables your variable speed drive to run with motor cables longer than the maximum permitted lengths. Its protection index is IP00. It weighs 10kg. It is used to limit overvoltages at the motor terminals, filter interference and reduce motor earth leakage current.