6RA7085-6DS22

The Siemens 6RA7085-6DS22 is a robust single-quadrant DC converter with advanced capabilities suited for industrial motor control systems. Operating effectively from a 3-phase 400 V AC power input, this converter utilizes a 6-pulse (B6C) line-commutated bridge topology to ensure reliable current conversion. With a rated AC input current reaching nearly 498 A, this unit is designed for demanding applications.

The DC armature voltage of this converter stands at approximately 485 V DC, which supports varying application requirements. Rated for an output current of 600 A, it can handle substantial load conditions efficiently. Under derated scenarios, the armature current can drop to around 443 A.

This device supplies a field (excitation) voltage of about 325 V DC while maintaining a field current rating of 25 A. Integration is simplified with compatibility for the D485/600 field rectifier, making the 6RA7085-6DS22 versatile in its use.

Control is facilitated via a microprocessor, providing configurable I/O for greater adaptability in different setups. The unit is air-cooled, functioning optimally within an ambient temperature range of 0 to 40 degrees Celsius. With an open chassis design designated as IP00, some environmental protections are limited, and altitude derating applies above 1,000 meters, ensuring proper functioning without overheating due to elevation.

This converter is housed in a chassis/rack form factor, with a typical weight ranging from 30 to 35 kg, making it manageable for various installation requirements. Efficiently engineered, the 6RA7085-6DS22 is built to meet the rigorous demands of DC motor applications in diverse operational environments.