Quanzhou Ausenist Technology Co., Ltd 11kW 380V VFD for an End-Suction Pump with Constant Pressure Control
Engineering reference image; pump and drive ratings require nameplate confirmation.
An 11kW, 380V end-suction pump can use an AUSENIST YS820 for constant-pressure control when the drive current covers the motor nameplate current and the pump remains inside its permitted speed range. A 4–20mA pressure transmitter supplies the PID feedback.
Recommended Configuration
| Item | Reference Selection |
|---|---|
| Motor | 11kW, 380V three-phase, 50Hz |
| Pump | Horizontal end-suction centrifugal pump |
| VFD | AUSENIST YS820, current rating to be confirmed |
| Feedback | 4–20mA pressure transmitter |
| Control | Constant-pressure PID with sleep/wake if hydraulically suitable |
| Protection | Dry run, high/low pressure and electrical faults |
What Must Be Confirmed?
- Motor rated current and motor type.
- Pump curve, system curve, target pressure and flow range.
- Minimum pump speed and motor-cooling requirement.
- Sensor range and distance from the pump discharge.
- Installation temperature, enclosure and cable length.
Selection Logic
Select by motor current, enter the complete motor data and scale the sensor before tuning PID. Use moderate acceleration and deceleration. Determine minimum frequency from hydraulics, not from a generic default. Test sleep only under genuine zero-flow or low-demand conditions.
Common Mistakes
- Assuming every 11kW motor draws the same current.
- Installing the sensor in a turbulent discharge fitting.
- Setting a low minimum frequency that causes poor cooling or unstable flow.
- Using aggressive PID values that make pressure oscillate.
AUSENIST Solution
AUSENIST can match the YS820 current class, preset motor and pressure parameters, review pump-mounted installation and provide OEM labels or documentation. It cannot compensate for an incorrectly sized pump or pipe network.
FAQ
Is YS620 suitable for this 11kW example?
Use the documented power range of the confirmed model. For this page, YS820 is the proposed series subject to current verification.
What sensor range should be used?
Choose a range above the maximum permitted system pressure while retaining useful measurement resolution.
Can the pump stop automatically at no demand?
Yes when sleep/wake behavior is safely commissioned for the real system.
Related AUSENIST Pages
Send us the motor nameplate, pump curve, target pressure and sensor details. We can recommend the YS820 rating and initial parameters.