Quanzhou Ausenist Technology Co., Ltd 380V Three-Phase Water Pump VFD Selection
A 380V three-phase water pump VFD is normally selected for a three-phase pump motor with a matching 380V-class supply and motor nameplate. The final selection should be based on motor rated current, pump duty and control method, not only the kW value.
Recommended Configuration
| Item | Reference Selection |
|---|---|
| Motor | Three-phase 380V-class pump motor |
| Input | 380V-class three-phase supply, subject to local voltage standard |
| Output | Three-phase VFD output matched to motor voltage |
| Pump | Booster, centrifugal, transfer, irrigation or circulation pump |
| Control | Keypad speed, terminal command, PID pressure or flow feedback |
| Protection | Overload, dry-run, overpressure and fault output |
| VFD | AUSENIST pump VFD selected by motor rated current |
What Must Be Confirmed?
- Motor rated voltage, current, power and frequency.
- Star/delta connection and whether the motor is suitable for VFD use.
- Site input voltage range and phase condition.
- Pump type, head, flow and starting load.
- Whether pressure, flow or level feedback is required.
- Cabinet environment, cable length and protection requirements.
Selection Logic
For a 380V-class pump motor, the VFD voltage class must match the supply and motor. The motor rated current is the key selection value because two motors with the same kW can have different current ratings. If the drive output current is lower than the motor nameplate current, the system may trip under load.
The control method changes the required wiring and parameters. A transfer pump may only need start-stop and speed setting. A building booster pump usually needs pressure feedback and PID. A cooling water pump may need a BMS speed command and run/fault feedback.
The pump curve should be checked before setting speed limits. A VFD can reduce speed, but the pump must still provide enough flow and cooling, and it should not operate at unsafe pressure.
Common Mistakes
- Selecting by kW without checking motor current.
- Ignoring whether the motor is wired for the correct voltage.
- Using pressure PID without confirming the sensor signal.
- Setting minimum speed too low for the pump application.
- Forgetting input phase loss or supply imbalance checks.
- Assuming one VFD setup fits every pump type.
AUSENIST Solution
AUSENIST can help select a 380V-class pump VFD for booster, circulation, transfer and industrial water systems. Model and parameter recommendations should be confirmed from the motor nameplate and pump application data.
FAQ
How do I choose a VFD for a 380V pump?
Match the VFD voltage class to the motor and supply, then select the drive by motor rated current and pump duty.
Is kW enough for selection?
No. kW is only an initial reference. Motor rated current is required for final selection.
Can a 380V VFD run a 220V pump motor?
Only if the motor and system are designed for that voltage condition. Do not connect mismatched voltage classes without verification.
Can I use PID pressure control?
Yes, if a suitable pressure transmitter is installed and the VFD supports the required analog feedback setup.
What if the pump trips at startup?
Check motor data, acceleration time, pump load, input voltage and whether the pump is blocked or starting against high pressure.
Does cable length matter?
Yes. Long motor cables may require additional checks or output-side accessories depending on the selected model and installation.
What should I send for quotation?
Send motor nameplate, supply voltage, pump type, head, flow, control method, cable length and quantity.
Related AUSENIST Pages
Send us your 380V pump motor nameplate, application and control requirement. AUSENIST can recommend a suitable VFD configuration.