The ABB 3ABD00058135-D is a variable-frequency drive rated for 1.5 kW normal-use output at 4 A, with a light-overload rating of 1.5 kW at 3.8 A. It accepts 380-500 V three-phase input and covers 47.5-63 Hz line frequencies.
The normal-use output current of 4 A sets the continuous motor rating for a standard 1.5 kW induction motor on 400 V supply. The light-overload curve drops to 3.8 A, which still covers the same power rating but with a slightly lower current margin — useful when the load profile is steady rather than cyclic.