Core Electrical Specifications
| Parameter | Value |
|---|---|
| Model | 6RA8091-6FV62-0AA0 |
| Product Type | SINAMICS DCM digital chassis converter for four – quadrant drives ((B6)A(B6)C circuit, regenerative operation) |
| Input Voltage | 3 – phase AC 480 V (50/60 Hz) |
| Input Current | 996 A (3 – phase AC) |
| Output Voltage (Armature) | 500 V DC |
| Output Current (Armature) | 1200 A DC (continuous) |
| US – Rating Output (Armature) | 500 V DC, 850 A DC |
| Field Input Voltage | 2 – phase AC 480 V |
| Field Output Voltage | 320 V DC |
| Field Output Current | 40 A DC |
| Power Rating (Approx.) | 600 kW (500 V × 1200 A, armature continuous) |
| Control Type | Microprocessor – based, SCR (thyristor) rectifier technology |
| Cooling Method | Forced air cooling (fan) |
| Power Loss | 4500 W (at rated DC current) |
| Protection Features | Overcurrent, overvoltage, undervoltage, overheating, field loss, short – circuit, reverse polarity protection, and IEC/EN safety compliance |
| Communication Interfaces | PROFIBUS DP (built – in); optional PROFINET, EtherNet/IP |
| Control Unit | Standard CUD (Control Unit Device), supporting closed – loop speed, current, and field control |
Performance Specifications
| Parameter | Value |
|---|---|
| Four – Quadrant Operation | Yes ((B6)A(B6)C circuit, regenerative braking to grid) |
| Control Modes | Armature voltage control, field current control, speed control (sensorless or with encoder/tachogenerator feedback) |
| Regulation Accuracy | Speed control ±0.01% of rated speed (with encoder feedback) |
| Dynamic Response | Current control loop: < 10 ms; speed control loop: < 100 ms |
| Overload Capacity | 150% of rated armature current for 60 s; 200% of rated armature current for 2 s |
| Power Factor | Typically 0.92 (at rated load) |
| Output Voltage Ripple | Low ripple via microprocessor – controlled SCR firing |
| Duty Cycle | Continuous (DC1 duty class) |
Mechanical & Environmental Specifications
| Parameter | Value |
|---|---|
| Mounting Type | Chassis – mounted (panel/rack installation) |
| Dimensions (H×W×D) | 785 mm × 268 mm × 435 mm (30.9 in × 10.6 in × 17.1 in) |
| Net Weight | 78 kg (172 lbs) |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) (derate above 40°C) |
| Storage Temperature | -25°C to 70°C (-13°F to 158°F) |
| Relative Humidity | 5% to 95% (non – condensing) |
| Altitude | Up to 1000 m (3280 ft) (derate above 1000 m) |
| IP Rating | IP00 (open frame), IP20 (chassis with cover) |
Key Features
- Four – Quadrant Operation: Delivers 1200 A continuous armature current with regenerative capability, ideal for applications like rolling mills, paper machines, and cranes requiring energy feedback and bidirectional motion.
- Precise Control: Microprocessor – based SCR control enables accurate speed and current regulation for high – precision industrial processes.
- Independent Field Control: 320 V DC / 40 A field output optimizes motor field performance for enhanced efficiency and control.
- Robust Design: Forced air cooling and comprehensive protection ensure reliable operation in harsh industrial environments.
- Flexible Communication: Built – in PROFIBUS DP and optional industrial Ethernet interfaces allow seamless integration into automation networks.
