Siemens SIMOREG‑K 6RA2491‑4GV62‑0 four‑quadrant fully‑digital thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 1200A, regenerative energy feedback to mains without external braking resistor, digital armature & field control, heavy‑duty forced‑air cooling, for ultra‑high‑power reversible DC motor speed‑control applications.

Siemens SIMOREG‑K 6RA2487‑4GV62‑0 four‑quadrant fully‑digital thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 850A, regenerative energy feedback to mains without external braking resistor, digital armature & field control, heavy‑duty forced‑air cooling, for high‑power reversible DC motor speed‑control applications.

Siemens SIMOREG‑K 6RA2491‑4GS22‑0 single‑quadrant fully‑digital thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 1200A, non‑regenerative operation requiring external braking resistor, digital armature & field control, heavy‑duty forced‑air cooling, for high‑power non‑reversible DC motor speed‑control applications.

Siemens SIMOREG‑K 6RA2487‑4GS22‑0 single‑quadrant fully‑digital thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 850A, non‑regenerative operation requiring external braking resistor, digital armature & field control, forced‑air cooling, for heavy‑duty non‑reversible DC motor speed‑control applications.

Siemens SIMOREG K 6RA2475‑6DV62‑0 four‑quadrant fully‑digital thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 200A, energy regenerative feedback to mains, digital armature & field control, forced‑air cooling, for high‑precision reversible DC motor speed‑control applications.