This is LEROY SOMER Three-phase controller from DMV2342 series for an output of 75A to control a DC Servo motor of 30kW. The DMV 2342 drives are designed to supply separately excited continuous current (dc) motors from a three phase ac supply between 220 and 480 V, ±10 %. The drives control armature current and speed, and the induced current if the drive is equipped with a variable excitation supply. Totally protected against disturbances related to the application, to the motor or to the mains supply, they can display a simple and rapid diagnosis of their operating state. Entirely digital they are programmable by the user.