The ABB 3ADT218587S0132 is a DC converter — a 2-quadrant unit rated for 1500 A at 525 VAC input, 50 Hz, in an H6 frame size. Three analog inputs and two analog outputs are on board.
The 1500 A continuous rating is the headline number that decides the motor armature current it can handle. The 525 VAC input is the line-side supply; this is a 50 Hz unit. Sound level of 73 dB(A) is moderate for this power class.
The H6 frame determines the mounting hole pattern and busbar connections — verify the cabinet depth and busbar drilling against the mechanical drawings before cutting the gland plate. Analog I/O (3 inputs, 2 outputs) are on board.