Factory-Trained Technicians
ISO-compliant process
Allen-Bradley PowerFlex 700 20BD481N3ANNNDD1 | 400 kW / 481 A VFD
Priority Repair or Ship-From-Stock
If your PowerFlex 700 fails or throws random faults, Flexa Systems can repair your 20BD481N3ANNNDD1 in-house at the component level or ship you a fully tested replacement unit from our stocked inventory.
Key Specifications
- Input Voltage: 480V AC
- Current (Amps): 481
- Power Rating: 400 kW / 536 HP
- Frame: 8
- Enclosure: Open/Flange Mount – Front: IP00, NEMA/UL Type Open; Back/Heatsink: IP54, NEMA 12
- HMI Presence: LCD Display, Full Numeric Keypad
- Documentation: Manual
- Brake: No
- Internal Braking Resistor: No
- Emission: CE Filter: No, CM Choke: No
- Comm Slot: DeviceNet
- Control & I/O: Vector | 115V AC
- Feedback: Encoder, 12V/5V
Most Common Faults We Can Solve
These are frequent PowerFlex 700 issues. We diagnose quickly and repair at the component level.
- Decel Inhibit: Bus regulation halts decel to limit DC bus.
Fix: Verify line & grounding, add DB resistor or lengthen decel; we configure/supply DB.
- Encoder Loss: One encoder channel missing (requires differential).
Fix: Verify wiring, rotation, pulse rate; we replace encoder/cable and re-align.
- OverVoltage: DC bus voltage exceeded the maximum value.
Fix: Verify line transients; extend decel time or add a dynamic brake option; we can size/install a DB kit and soak-test the drive.
- Input Phase Loss: Ripple indicates a missing input phase or blown fuse.
Fix: Inspect fuses and incoming power; we verify phase balance and replace protection if necessary.
- DB Resistance: Internal DB resistor ohms out of range.
Fix: Replace resistor; we supply/fit correct DB module and test.
- SW OverCurrent: 1 ms current exceeded its rating (above cont., below HW limit).
Fix: Reduce load/boost/brake volts; we capture waveforms and reset to safe values.
- Pulse In Loss: Z-channel selected but no pulses present.
Fix: Check wiring and pulse generator; we replace failed pickup.
Important Notes
Pricing listed on the website is for reference only and is subject to change over time.
Unsure about the exact model? Share a photo or full catalog code. Flexa Systems will confirm compatibility fast.
We service and stock Allen-Bradley PowerFlex 700 VFDs—component-level repairs or ready-to-ship replacements.
- Load testing is performed on all units prior to shipment.
- Lead times and pricing depend on condition and options.
- Expedited exchange programs available.
- 12–24 month coverage on repairs and remans (where applicable).
Talk to a Drive Specialist
Texas-based in the Dallas–Fort Worth area, serving all 50 states. Same-day answers and fast turnarounds.
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Send your part number or a photo — we’ll confirm compatibility and options.