Siemens 6RA2818‑6DS21‑0 SIMOREG 6RA28 DC Converter, 400V 30A
Siemens SIMOREG 6RA28 6RA2818‑6DS21‑0 single‑quadrant non‑regenerative thyristor DC converter, 3‑phase AC 400V input, rated armature DC current 30A, analog closed‑loop speed and current regulation, forced‑air cooling, for heavy‑industry low‑power DC variable‑speed motor applications.