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Frequency converters 500.0 kW

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Variable Frequency Drives 500 kW — Heavy-Duty Industrial Drives

A 500 kW variable frequency drive (VFD) is an industrial inverter for controlling electric drives in high-power applications across mining, chemical, metallurgical, oil & gas, and cement industries. Three-phase 3x380V supply, rated current from 860A, built-in overload and over-temperature protection. This page lists all 500 kW models available at chastotnik.ua.

Applications of 500 kW Variable Frequency Drives

Equipment at this power level is deployed where smooth starting and speed regulation of heavy machinery are critical:

  • Pumping stations — industrial water supply, oil transfer and chemical pumps. See VFDs for pumps.
  • Ventilation systems — mine and industrial ventilation, large air blowers. See VFDs for fans.
  • Compressor equipment — centrifugal and screw compressors in the 400–630 kW range.
  • Conveyor lines — belt conveyors, elevators and transport systems at mining and cement plants.
  • Mills and crushers — ball mills, vertical crushers, shredders in metallurgy and mineral processing.
  • Extruders and presses — polymer extrusion lines, rubber manufacturing, heavy metal fabrication.

Installing a VFD instead of direct-on-line starting reduces inrush current to 150% of rated (vs 600–700% with DOL), cutting mechanical stress and extending motor service life.

500 kW VFD Models in Catalogue

The chastotnik.ua catalogue features over 30 models at 500 kW from 10 manufacturers. Key series with technical specifications are shown below.

Model Brand / Series Supply Current, A IP Key features
GD200A-500G-4 INVT GD200A 3x380V 860 IP20 In stock; built-in EMC filter; f_max=400 Hz; sensorless vector control; 150%/60s overload
CHF100A-500G-4 INVT CHF100A 3x380V 860 IP20 Fan & pump series; built-in EMC filter; 150%/60s overload
FR-A842-09620-SLD Mitsubishi Electric FR-A800 3x380V 962 IP20 Built-in PLC; built-in brake chopper; f_max=590 Hz; 110%/60s overload (SLD)
FR-A842-12120-ND Mitsubishi Electric FR-A800 3x380V 962 IP20 ND mode (reduced torque); built-in PLC; 120%/60s overload
ATV71HC50N4 Schneider Electric Altivar 71 3x380V 941 IP20 Closed- and open-loop vector control; 170%/2s overload; optional brake module VW3A3501

How to Choose a 500 kW VFD

Key selection parameters:

  • Load type — Heavy duty (G/HD): constant-torque loads such as conveyors and positive displacement pumps require 150%/60s overload. Normal duty (P/ND/LD): variable-torque fans and centrifugal pumps are served by 110–120%/60s models.
  • Ingress protection (IP) — IP20 is standard for control cabinet mounting. Open-air installation requires IP21 or IP54 (see Vacon V100 FLOW IP54 variants).
  • Built-in PLC — for standalone operation without an external PLC, choose series with built-in PLC: Mitsubishi Electric FR-A800, Control Techniques Unidrive SP or POWERDRIVE MD2R.
  • Control mode — scalar V/f for fans and pumps; sensorless vector for conveyors and compressors; closed-loop FOC for precision positioning and hoisting applications.
  • Supply voltage — most 500 kW models accept 3x380V. The FR-A872-05690-E2 (Mitsubishi Electric) is rated for 3x690V, suited to medium-voltage industrial installations.

Related power ratings

Also available: 400 kW VFDs, 315 kW VFDs, 250 kW VFDs. For soft starting without speed control, consider soft starters.

Warranty and support

All products in the chastotnik.ua catalogue carry the manufacturer's official warranty. Pre-sale consultation on model selection, documentation, and commissioning support. Delivery across Ukraine via Nova Poshta; same-day dispatch for in-stock items. Payment by bank transfer for companies, card payment for individuals.

Frequently Asked Questions

What is a variable frequency drive and how does it work?

A VFD is an electronic device that converts AC mains voltage to DC (rectifier stage), then back to AC with adjustable frequency and amplitude (inverter stage). By varying the output frequency from 0 to 600 Hz, it smoothly controls the rotational speed of an AC induction motor from standstill to rated speed and beyond, while limiting starting current to 1.5× rated.

How do I size a VFD for my motor?

The VFD power rating should equal or exceed the motor nameplate power. For pumps and fans (variable torque), select based on the motor rating. For conveyors, cranes, and crushers (constant torque or heavy starting), choose one power step above — for example, for a 4 kW conveyor motor, we recommend a 5.5 kW VFD. Also verify that the motor's rated current does not exceed the VFD's current rating.

Can I run a three-phase 380V motor from a single-phase 220V supply?

Yes, you need a VFD with single-phase 220V input and three-phase 380V output, such as the Veichi AC70E or AC10 T/S2 variant. Power is limited to 2.2–4 kW depending on the series. The VFD not only starts the motor but also provides soft starting, speed control, and overload protection.

What is the difference between scalar and vector control?

Scalar control (V/f) maintains a constant voltage-to-frequency ratio — a simple, reliable method for pumps, fans, and compressors. Vector control (SVC, FOC) calculates motor current and flux vectors in real time, delivering 150–200% rated torque at low frequencies. Vector control is essential for conveyors, elevators, extruders, cranes, and CNC machine tools.

Why do I need an EMC filter in a VFD?

An EMC (electromagnetic compatibility) filter reduces high-frequency interference that the VFD generates in the power supply and airwaves. It is mandatory for facilities with sensitive equipment (medical, laboratories, server rooms), residential buildings, and when the cable between VFD and motor exceeds 25 m. The Veichi AC10, Delta VFD-E, and INVT GD20 models include a built-in Class C3 EMC filter.

How much energy does a VFD save?

On pumps and fans, savings range from 20% to 60% depending on the load profile. Power is proportional to the cube of speed (P∝n³): reducing speed by 20% halves energy consumption. If equipment typically operates at 70–80% of rated speed, average savings are approximately 40%. Payback period for a VFD on a pumping station is 6 to 18 months.