Quanzhou Ausenist Technology Co., Ltd 5.5kW 220V Single-Phase to 380V Three-Phase VFD for a Borehole Pump
Engineering reference image; a boost-output drive must be confirmed for the exact motor and supply.
A normal 220V VFD does not produce 380V output. Running a 5.5kW, 380V three-phase borehole motor from 220V single-phase therefore requires a purpose-built voltage-boost VFD. The input circuit must also carry substantially higher current than a 380V three-phase feeder.
Recommended Configuration
| Item | Reference Selection |
|---|---|
| Motor | 5.5kW, 380V three-phase submersible motor |
| Input | 220V single-phase |
| Output | 380V three-phase through a confirmed boost design |
| Pump | Borehole/submersible pump |
| Control | Constant pressure or tank level |
| VFD | AUSENIST special voltage-boost pump configuration |
What Must Be Confirmed?
- Motor nameplate current, voltage, frequency and insulation data.
- Available single-phase breaker capacity and cable size.
- Utility transformer or generator capacity and voltage drop.
- Total VFD-to-motor cable length.
- Borehole level, pump curve and dry-run detection method.
Selection Logic
Size the output for the motor current and the input for the real single-phase load. A weak feeder can collapse during acceleration even when the VFD kW appears correct. Review long-cable output protection and grounding separately. Set current, voltage and frequency from the motor nameplate; never copy a 220V motor parameter set.
Common Mistakes
- Buying a standard 220V-output VFD for a 380V-only motor.
- Sizing the breaker from 5.5kW without calculating input current.
- Ignoring voltage drop on rural feeders.
- Omitting long-cable and motor-insulation checks.
AUSENIST Solution
AUSENIST can evaluate a special 220V-input/380V-output configuration, input-current requirement, pump protections and parameter preset. The project may be unsuitable if the single-phase source cannot provide adequate continuous power.
FAQ
Can a transformer and normal VFD be used instead?
Possibly, but the transformer, VFD input and complete protection system must be engineered together.
Does the VFD change a single-phase motor into a three-phase motor?
No. This solution operates a three-phase motor from a single-phase source.
Is 5.5kW always practical on single-phase supply?
Not always. Feeder capacity and voltage stability are decisive.
Related AUSENIST Pages
Send us the motor nameplate, total cable length and single-phase supply capacity. We can check whether the boost-output VFD solution is suitable.