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11kW 380V VFD for an Irrigation Pump System in Colombia

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An 11kW 380V irrigation pump VFD selection case for Colombia, covering variable demand, pressure feedback, motor current checks and basic site setup notes.

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11kW 380V VFD for an Irrigation Pump System in Colombia

Real AUSENIST pump configuration photo used for technical reference; it is not presented as the customer site photo.

Introduction

An irrigation contractor in Colombia needed a 380V VFD solution for an 11kW irrigation pump. The system was expected to serve changing field demand, so the buyer wanted a pump inverter that could adjust motor speed instead of running the pump at full speed under every condition.

Based on the information available for this draft, AUSENIST recommended a 380V pump VFD configuration with the control method confirmed according to the irrigation layout. If the system uses pressure-based zone control, a pressure transmitter and PID configuration should be included.

Project Overview

Item	Project Requirement
Country	Colombia
Customer Type	Irrigation contractor
Application	Agricultural irrigation
Pump Type	Irrigation pump
Motor Power	11kW
Motor Voltage	380V three-phase
Power Supply	380V three-phase
Control Requirement	Variable-speed operation for changing demand
Pressure Sensor	Recommended if constant pressure is required
VFD Model	AUSENIST 380V pump VFD, 11kW class, subject to current confirmation
Control Method	Manual speed, terminal control or PID pressure control according to system design

Customer Requirement

The customer needed a VFD for an irrigation pump where water demand could change by irrigation zone, valve position or operating schedule. A fixed-speed pump may produce excessive pressure under low-demand conditions or insufficient control flexibility when different zones are opened.

The main purchasing requirement was to select a VFD that matched the 11kW 380V motor and could support the intended control method. The buyer also needed to know what information should be checked before the model was finalized.

Technical Challenge

Irrigation projects should not be selected by motor kW alone. The pump curve, operating pressure, flow variation and pipe network design all affect whether variable-speed control will behave correctly. A VFD cannot solve a hydraulic design error by itself.

If a pressure transmitter is used, its range and installation position must match the irrigation system. If the pressure setpoint is too high, the pump may run near maximum frequency for long periods. If the minimum frequency is too low, the pump may not produce useful flow or may operate outside a suitable range.

VFD Selection

Based on the information provided by the customer, the recommended direction is an 11kW 380V pump VFD matched to the actual motor rated current. AUSENIST should review the motor nameplate and the irrigation control method before final confirmation.

The selection should check:

• Motor rated current and voltage.
• Pump curve and normal operating frequency range.
• Irrigation zone pressure requirement.
• Whether control is manual, external terminal, timer-based or pressure feedback.
• Cable length, enclosure ventilation and site temperature.

If the irrigation site has unstable supply voltage, long motor cable or high ambient temperature, accessories or a higher-rated configuration may need engineering review.

Recommended Solution

Item	Recommended Configuration
VFD Model	AUSENIST 380V pump VFD, 11kW class
Rated Power	11kW, subject to motor current confirmation
Input	380V three-phase
Output	380V three-phase
Control Mode	Manual speed, terminal control or PID pressure control
Pressure Feedback	Analog pressure transmitter if constant pressure is needed
Optional Accessories	Pressure sensor, panel controls, reactor if required by cable or supply conditions

For pressure-based irrigation, the sensor sends feedback to the VFD. The drive adjusts pump frequency to maintain the target pressure as valves open or close. For simpler water transfer, the system may use keypad speed setting, terminals or an external controller instead of PID.

System Operating Logic

Irrigation demand changes
↓
Control signal or pressure feedback reaches VFD
↓
VFD adjusts output frequency
↓
Pump speed changes
↓
Flow and pressure follow the irrigation requirement

Recommended Initial Parameters

Parameter	Recommended Setting
Motor Rated Power	Set according to 11kW motor nameplate
Motor Rated Voltage	380V
Motor Rated Current	Set according to actual nameplate
Maximum Frequency	According to motor and pump rating
Minimum Frequency	Confirm according to pump curve and irrigation demand
Acceleration Time	Set to reduce pipe shock
Deceleration Time	Set to avoid water hammer and overvoltage trips
PID Target	Use only after required pressure is confirmed
Pressure Feedback	Match transmitter signal and pressure range

Final settings should be adjusted according to the actual motor nameplate, pump curve and site conditions.

Expected Operating Behavior

The VFD is expected to provide smoother pump starting and allow the irrigation pump to respond to changing demand. If PID pressure control is used, the pump should adjust speed according to pressure feedback rather than running continuously at one fixed speed.

No actual running data was provided, so this article does not state a measured energy-saving percentage or verified field result.

Engineering Notes

• Check the irrigation zone pressure before setting a PID target.
• Confirm motor rated current before selecting the final VFD model.
• Pressure sensor range should cover the real working pressure without being excessively oversized.
• Minimum frequency should be based on the pump curve, not guesswork.
• Long motor cables or unstable rural grids may require additional review.

FAQ

Can an irrigation pump use a VFD?

Yes, if the motor, pump and hydraulic system are suitable for variable-speed operation. The VFD should be selected by current, voltage and application duty.

Is pressure feedback required for irrigation?

It is required when the system needs automatic pressure control. For simple water transfer, manual speed or external terminal control may be enough.

Can a VFD save energy in irrigation?

It can reduce unnecessary full-speed operation when demand is lower, but the actual saving depends on the pump curve, duty cycle and system design. No universal percentage should be assumed.

What data is needed before quotation?

The supplier needs the motor nameplate, pump type, supply voltage, pressure requirement, control method and site conditions.

Have a Similar Pump Application?

If you are selecting a VFD for a centrifugal pump, booster pump, irrigation pump or constant-pressure water system, send us:

• Motor nameplate
• Pump type
• Motor power
• Rated voltage and current
• Power supply
• Required pressure
• Application conditions

AUSENIST can recommend the appropriate VFD model and control configuration.

Target Keywords:

11kW irrigation pump VFD, 380V pump VFD, VFD for irrigation pump, variable speed irrigation pump, pump inverter Colombia, PID irrigation pump control

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