6RA8081-6DV62-0AA0

What type of drive is this unit designed for?

This unit is a SINAMICS DCM DC converter designed for four-quadrant DC drive applications. It is intended for installations where a DC motor needs controlled acceleration, deceleration, reversing and regenerative braking capability.

What are the main electrical ratings?

The converter is rated for a 400 V AC three-phase armature supply, with a rated DC output voltage of 420 V, rated input current of 332 A and rated DC current of 400 A. Its rated power is 168 kW.

What does four-quadrant operation mean in practical use?

Four-quadrant operation allows the drive to motor and brake in both directions of rotation. In practical terms, this suits applications that need reversing and controlled deceleration, such as winders, unwinders, test rigs and other DC motor systems with changing load direction.

What field supply does the converter provide?

The unit includes a standard 1Q field power unit. The rated field supply voltage is 2 AC 400 V, with rated DC field current of 25 A and rated excitation voltage of 320 V.

Is this unit intended for cabinet installation?

Yes. It is a chassis-style converter with IP00 protection, so it is intended to be integrated into a suitable electrical cabinet or enclosure rather than used as a stand-alone enclosed drive.

What are the dimensions and weight?

The overall dimensions are approximately 625 x 268 x 275 mm, and the unit weighs about 28 kg. This can be useful when planning panel space and handling requirements.

How is the converter cooled?

For this current class, the converter uses forced-air cooling with an integrated fan. When integrating the unit into a cabinet, adequate ventilation and airflow clearance should be considered to help maintain suitable operating conditions.

What ambient conditions should be considered during installation?

The published data indicates operation at coolant temperature up to 40°C and installation altitude up to 1,000 m without derating. If the installation is above that altitude or in a hotter environment, the application should be checked carefully for any reduction in usable output.

Is this suitable for continuous-duty operation?

Yes. The converter is listed with load class Class DC I, which means it is intended for continuous-duty operation when installed within the stated operating conditions.

What kind of applications is this converter commonly used for?

A unit such as the Siemens 6RA8081-6DV62-0AA0 is commonly selected for industrial DC motor applications where controlled speed, torque and reversing performance are important. It can be a strong fit for retrofit projects where an existing DC motor is being retained and a modern converter is needed for improved control.