Siemens 6RA8025-6DS22-0AA0 SINAMICS DCM 400V/50A In 485V/60A Out Two-Quadrant DC Converter

The Siemens 6RA8025-6DS22-0AA0 is a SINAMICS DCM DC converter for two-quadrant drives with a B6C bridge connection, rated for 400 V 3AC / 50 A input and 485 V DC / 60 A output. It includes a controllable field rectifier, D485/60 MRE-GEE6S22, for separately excited DC motor field control, and weighs 12.0 kg.

Technical Specifications

Selection Notes

The two-quadrant (B6C) bridge limits this converter to single-direction torque with controlled deceleration rather than full four-quadrant regenerative braking, so it fits drives that do not need active braking energy return. The 50 A / 400 V 3AC input and 60 A / 485 V DC output set the motor power window this unit covers; a higher-current or four-quadrant SINAMICS DCM variant is needed outside that range. The controllable field rectifier lets the unit regulate motor field current directly, which matters for field-weakening operation above base speed.

Applications

Speed and torque control of separately excited DC motors in two-quadrant duty — winders, extruders, and hoists that do not require regenerative braking — supplied from a 400 V 3AC line.