| Item | Specification |
|---|---|
| Part Number | 6RA2875‑6DV61‑0 |
| Product Family | SIMOREG 6RA28 |
| Product Type | Four‑quadrant regenerative thyristor DC converter |
| Input Supply | 3‑phase AC 400 V, tolerance +15 % / −20 % |
| Rated Frequency | 45‑65 Hz |
| Rated Armature DC Current | 200 A |
| Armature Output Voltage | 0‑420 V DC |
| Power Circuit Topology | (B6)A(B6)C four‑quadrant regenerative bridge |
| Rated Exciter Voltage | 340 V DC, uncontrolled field rectifier |
| Typical Motor Power @400V | 96 kW |
| Control System | Analog closed‑loop: speed, current, armature voltage |
| Interfaces | Analog set‑point input, binary control I/O terminals |
| Cooling | Forced‑air cooling with integrated fan |
| Protection Class | Power unit IP00, control electronics IP20 |
| Mounting | Cabinet floor‑mount installation |
| Operating Ambient Temperature | 0 °C … +45 °C; enhanced ventilation required above 35 °C |
| Weight | Approx. 31 kg |
| Country of Origin | Germany |
| Certifications | CE |
The 6RA2875‑6DV61‑0 belongs to Siemens SIMOREG 6RA28 analog thyristor DC converter series. This four‑quadrant regenerative drive unit feeds braking energy back to the mains grid, eliminating the need for large external braking resistors during regenerative operation. It accepts 3‑phase 400V AC mains input and provides 200A rated armature DC current for medium‑power DC motors. Analog hardware circuits implement closed‑loop regulation of speed, current and armature voltage. Control signals are connected via screw terminal blocks for analog set‑points, start‑stop commands, interlock logic and status feedback. Equipped with built‑in fan forced‑air cooling, the unit must be installed inside user‑provided industrial cabinet with external semiconductor fuses and line reactor. This converter is widely used for on‑site replacement and maintenance of heavy‑industry DC‑driven equipment.
