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6RA7081-6DS22-0
The Siemens 6RA7081-6DS22-0 is a single-quadrant DC drive converter controlled by a microprocessor. It operates on a three-phase AC input voltage of 400 V with a tolerance of ±10%, making it suitable for various industrial applications.
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Technical specifications for 6RA7081-6DS22-0
| Manufacturer | Siemens |
|---|---|
| Product Type | Single-quadrant DC drive converter with microprocessor control |
| Product Line | SIMOREG |
| Part Number | 6RA7081-6DS22-0 |
| Weight | 14.56 lbs (6.61 kg) |
| Input Voltage (3-phase AC) | 400 V AC (±10% tolerance) |
| Input Current (Continuous) | 332 A (at full load) |
| Output Voltage (DC) | 485 V DC (adjustable via field weakening) |
| Output Current (Continuous) | 400 A (base rating); 276 A (US derated rating at 485 V DC) |
| Field Supply Input Voltage | 400 V AC (isolated for external excitation) |
| Field Output Current (DC) | 32 A (max, for motor field winding excitation) |
| Rectifier Configuration | B6C bridge (3-phase thyristor-based, non-regenerative) |
| Cooling Method | Forced-air cooling with integrated fans |
| Overload Capacity | 150% for 60 seconds (thermal limits) |
| Protection Features | Overcurrent, overtemperature, phase loss, short-circuit, and undervoltage monitoring |
| Operating Temperature Range | 0°C to 40°C (derating above 40°C) |
| Field Supply – Output | Approximately 325 V at 25 A |
The Siemens 6RA7081-6DS22-0 is an efficient single-quadrant DC drive converter with advanced microprocessor control. It utilizes a three-phase AC input rated at 400 V, allowing for a tolerance of ±10%. Under continuous operation, the device can handle an input current of 332 A at full load. The output voltage is adjustable up to 485 V DC, which can be modified through field weakening as needed. Continuous output capacity reaches 400 A; in the United States, the derated output current at 485 V DC drops to 276 A, showcasing its adaptability in different operational conditions.
The drive converter also features a field supply input voltage of 400 V AC, which is isolated to provide external excitation. The maximum allowable field output current for motor winding excitation is 32 A. Utilizing a B6C bridge configuration, this unit implements a thyristor-based non-regenerative design.
To promote reliable thermal management, forced-air cooling is employed, supported by integrated fans to ensure optimal performance. The drive is capable of withstanding overload conditions with up to 150% capacity for a brief period of 60 seconds, respecting thermal limits. Comprehensive protection features include monitoring for overcurrent, overtemperature, phase loss, short-circuit, and undervoltage conditions.
Designed for operation in temperatures between 0°C and 40°C, the performance of the 6RA7081-6DS22-0 will begin to derate beyond the 40°C threshold. For field supply output, approximately 325 V can be maintained at 25 A, allowing for reliable operations in various applications.
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