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Scalar for Frequency Converters

Found 518 products
Danfoss × Delta Electronics × Schneider Electric × 110-130 ×
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Frequency Converters 3 Phase 380V — Industrial Three-Phase Motor Control

A three-phase 380V frequency converter (VFD) is the standard drive type for industrial asynchronous motors. Powered by a standard 380V three-phase supply, these drives cover a wide power range from 0.4 to 500 kW with high conversion efficiency. The Chastotnik.ua catalogue features over 1,100 three-phase VFD models from 8 leading manufacturers for pumps, fans, conveyors, compressors, and machine tools.

How to Choose a 3 Phase 380V Frequency Converter

Selecting a three-phase VFD starts with the motor parameters and load characteristics. Key selection criteria:

  • Motor power — the VFD rated power must equal or exceed the motor power. For heavy-duty starts (crushers, presses), select one size up.
  • Rated current — the VFD output current must exceed the motor rated current. For fan/pump loads, ND (normal duty) mode is sufficient; for constant torque, select HD (heavy duty) mode.
  • Control typescalar control (V/f) suits pumps and fans, while vector control is required for cranes, elevators, and winding machines demanding precise torque.
  • IP protection class — IP20 for panel mounting, IP54/IP66 for dusty or wet environments.
  • Built-in features — EMC filter, brake module, PLC controller, communication protocol (Modbus, Profibus, EtherCAT).
ModelPowerCurrent, AIPApplication
Veichi AC10 1.5 kW1.5 kW4.0IP20Mixers, small pumps
INVT GD20 4 kW4.0 kW9.5IP20Conveyors, fans
Delta VFD-E 5.5 kW5.5 kW13.0IP20Compressors, machine tools
Danfoss FC51 4 kW4.0 kW9.0IP20Pump stations, HVAC
Schneider ATV310 11 kW11.0 kW24.0IP20Production lines, conveyors

Manufacturers of 3 Phase 380V Frequency Converters

The catalogue includes three-phase 380V VFDs from manufacturers with confirmed sales in Ukraine:

  • Veichi — AC10, AC70, AC80C series with built-in PLC and brake module
  • Delta Electronics — VFD-E, VFD-C2000, MS300 series with CANopen and EtherCAT
  • INVT — GD20, GD200A, GD350A series with vector control
  • Danfoss — FC51, FC51 Micro Drive, VLT series for HVAC and water supply
  • Mitsubishi Electric — FR-D700, FR-E800, FR-A800 series for precision control
  • Schneider Electric — Altivar 310, 320, 930 series for industrial automation
  • ABB — ACS150, ACS355, ACS580 series with built-in Safe Torque Off
  • Siemens — Sinamics V20, G120C, G120X series for building systems

3 Phase 380V Converters by Specifications

Select a three-phase VFD by key parameters:

Warranty and Support

All three-phase 380V frequency converters come with a manufacturer warranty of 12 to 24 months. Chastotnik.ua provides technical consultation for VFD selection matched to your specific motor and mechanism, assistance with parameter configuration, and after-sales service. Delivery across Ukraine: Kyiv, Kharkiv, Odesa, Dnipro, Lviv, and other cities. Payment by bank transfer for businesses or card payment for individuals.

Frequently Asked Questions

What is the difference between scalar and vector VFDs?

A scalar VFD maintains a constant voltage-to-frequency ratio (V/f) without speed feedback. A vector VFD independently controls flux and torque for more precise motor control. For pumps and fans, scalar mode delivers the same energy savings at a lower equipment cost.

What applications suit scalar V/f control?

Scalar V/f mode is optimal for loads with quadratic torque characteristics: centrifugal pumps, fans, compressors, and mixers. It also suits conveyors with light starting loads where starting torque does not exceed 120% of nominal.

How much energy does a scalar VFD save?

On fans and pumps, scalar VFDs reduce consumption by 30-50%. Power is proportional to the cube of speed: reducing RPM by 20% cuts consumption by approximately 50%. The effect is identical for scalar and vector modes on these load types.

Can a scalar VFD be switched to vector mode?

Most modern drives support both modes — for example, Delta C2000, INVT GD20, Veichi AC10. The mode is selected in parameter settings. Vector mode additionally requires a motor parameter auto-tuning procedure.

Which scalar VFD is best for a pump?

For circulation or borehole pumps, select a VFD rated 10-20% above motor power, with a built-in EMC filter and IP20 protection. Popular models: Danfoss FC51, Veichi AC10, INVT GD20 — all feature scalar mode optimised for pumping applications.