6RA7091-6FS22

Siemens provides the 6RA7091-6FS22, a single-quadrant DC converter adept for various industrial requirements. The device employs a B6C line-commutated rectifier topology that integrates seamlessly into systems needing significant power regulation. With a nominal armature voltage fixed at 550 V DC, it caters to a high-rated armature current measuring 1200 A, which ensures efficient performance under varying conditions.

This unit also supports an alternate or derated condition of 500 V DC at 850 A, allowing it to adjust according to specific load demands. It is supplied using a 3-phase, 460 V AC configuration and pulls an input current of approximately 995 A during operation. This setup functions around the core of a power module class rated at 550 V and 1200 A, demonstrating its capability for high duties.

For field or excitation outputs, the model provides around 375 V DC with a current output of 30 A, offering reliable voltage for associated field applications. Management of the converter is cornered through a microprocessor digital control system, which enhances its operational efficacy and response time. Cooling is achieved via a forced-air fan method, ensuring the unit remains operational even under extensive workloads.

Those requiring scalability will find this single-quadrant DC converter capable of paralleling, allowing for expanded capacities when needed. With a continuous output power roughly amounting to 660 kW, this model stands as a formidable solution for numerous applications in the industrial field.