400V VFDs

Our INVT 400 V Variable Frequency Drives (VFDs) cover a wide power range from 0.75 kW up to 500 kW, offering efficient and reliable solutions for both standard and high-performance applications.
From compact 0.75 kW, 1.5 kW, 4 kW or 11 kW drives for pumps, fans, and conveyors to powerful 250 kW – 500 kW systems for demanding industrial processes – you will find the right VFD for every application.

The GD20-EU series covers the 0.75 kW – 110 kW range, delivering proven reliability, integrated safety features, and an outstanding price-performance ratio.

For complex and dynamic applications, the GD350A series provides advanced vector control, flexible expansion options, and precise motor management for maximum performance.

INVT 400V Variable Frequency Drives (VFDs) – High-Power Industrial Solutions

INVT 400V Variable Frequency Drives (VFDs) deliver reliable, energy-efficient, and high-performance motor control for medium- to large-power motors across industrial, commercial, and utility applications. Covering a wide range from 0.75 kW up to 500 kW, these drives are optimized for demanding processes, lifting systems, pumps, fans, conveyors, and machinery requiring precise speed, torque, and position control.

Designed for long-term reliability, advanced vector control, and seamless integration, INVT 400V VFDs are trusted by engineers worldwide for both standard and complex applications.

INVT 400V VFD Series Overview

GD20-EU – Compact, Reliable, and Cost-Effective

The GD20-EU series is perfect for medium-power motors (0.75–110 kW) in standard industrial and building automation applications.

GD350A – High-Performance Industrial Drive

The GD350A series supports high-power, complex, and dynamic applications (1.5–500 kW), providing advanced vector control and flexible integration for precise motor management.

Technical Highlights

Feature GD20-EU GD350A
Power Range 0.75–110 kW 1.5–500 kW
Motor Compatibility Asynchronous Asynchronous / Synchronous (PM)
Control Mode Sensorless Vector Control Advanced Vector Control / I/F Mode
Safety Functions STO SIL2/SIL3 STO SIL2/SIL3 + Safety Expansion Options
Expansion – 3 Slots: Fieldbus, Feedback, I/O
Overload Capacity 200% 200%
EMC Filter Integrated from 4 kW Integrated on all models
Braking Chopper Up to 37 kW Optional / Configurable

How 400V VFDs Work in Industrial Systems

VFDs regulate motor speed and torque by adjusting the frequency and voltage supplied to the motor. INVT 400V drives allow:

  • Smooth start/stop to reduce mechanical wear

  • Optimized energy consumption by matching motor output to load

  • Precise control in demanding industrial processes

  • Integration with SCADA and PLC systems for automated control

Advantages over standard 230V drives:

  • Higher power capacity for industrial motors

  • Advanced vector control algorithms for synchronous and asynchronous motors

  • Greater flexibility in applications with high dynamic load changes

Selection Guide for 400V Variable Frequency Drives (VFDs)

Choosing the right 400V VFD is critical for ensuring energy efficiency, motor protection, and long-term reliability. The INVT GD20-EU and GD350A series offer a broad power range and flexible features, but selecting the correct drive requires understanding motor type, load characteristics, and environmental factors.

1. Determine Motor Power and Load Requirements

The first step in VFD selection is matching the drive to your motor’s power and load profile:

Drive Series Power Range Typical Applications
GD20-EU 0.75 – 110 kW Pumps, fans, HVAC systems, light conveyors
GD350A 1.5 – 500 kW Industrial machinery, heavy conveyors, lifting equipment

Considerations:

  • Continuous duty vs. intermittent loads.

  • Overload requirements (up to 200% for short durations with INVT drives).

  • Start/stop frequency and motor thermal limits.

2. Motor Type Compatibility

Different motor types require specific drive capabilities:

Motor Type Recommended Drive Notes
Asynchronous (standard induction) GD20-EU or GD350A Both series provide stable performance.
Synchronous (permanent magnet) GD350A Supports precise vector control and feedback.
Motors requiring speed/position feedback GD350A Expansion slots for encoder/resolver interfaces.

Tip: For high-precision positioning or applications with rapid load changes, vector-controlled drives like GD350A offer superior accuracy and torque control.

3. Application Complexity

  • Simple Applications: Pumps, fans, light conveyors → GD20-EU is cost-effective and reliable.

  • Complex or Dynamic Applications: High-power industrial machinery, lifting, precision positioning → GD350A with advanced vector control and modular expansion.

4. Environment and Installation

VFD performance can be affected by installation conditions:

  • Indoor, clean environments → Standard GD20-EU or GD350A installation.

  • Harsh industrial environments → GD350A offers enhanced EMC filtering, wider temperature range, and vibration-resistant construction.

  • Outdoor or dusty locations → Ensure IP20/IP21 or higher protection as required, with optional enclosure solutions.

5. Integration and Communication Requirements

Modern automation systems often require advanced communication:

Feature GD20-EU GD350A
Basic control ✓ ✓
PLC integration Limited ✓ (Fieldbus cards available: Profibus, Profinet, EtherCAT, CANopen)
Remote monitoring Limited ✓ (Wi-Fi/Bluetooth optional, Modbus/RS485)
Multi-drive coordination Limited ✓

Tip: For SCADA systems, networked conveyors, or distributed control, GD350A provides maximum flexibility.

6. Safety and Compliance

VFDs often operate in environments where safety is critical:

  • STO SIL2 / SIL3 safety functions integrated.

  • Short-circuit, overload, and overvoltage protections included.

  • Verify local industrial safety standards for your installation.

7. Optional Features and Enhancements

Depending on your application, optional features may improve system performance:

  • Braking choppers – for rapid deceleration of heavy loads.

  • DC reactors – reduce harmonics and improve power quality.

  • Additional I/O modules – extend control and monitoring capabilities.

  • Wi-Fi/Bluetooth modules – enable remote diagnostics and parameter tuning.

8. Quick Selection Summary

  • GD20-EU: Best for small to medium motors, standard industrial or HVAC applications, cost-effective and reliable.

  • GD350A: Best for complex or high-power systems, precision control, multi-communication integration, and harsh industrial environments.

Selection by Motor Power (400V Frequency Inverters)

In the table below you will find all available INVT GD20-EU and GD350A frequency inverters in the power range from 0.75 to 500 kW.
Use the links to go directly to the respective product pages and view detailed technical specifications.

Motor Power Normal Duty (GD20-EU) Normal Duty (GD350A) Heavy Duty (GD350A)
0,75 kW GD20-0R7G-4-EU – 0,75 kW GD20-EU – –
1,5 kW GD20-1R5G-4-EU – 1,5 kW GD20-EU – GD350A-1R5G/2R2P-4 – 1,5 kW GD350A (Heavy Duty)
2,2 kW GD20-2R2G-4-EU – 2,2 kW GD20-EU GD350A-1R5G/2R2P-4 – 2,2 kW GD350A (Normal Duty) GD350A-2R2G/003P-4 – 2,2 kW GD350A (Heavy Duty)
3,0 kW – GD350A-2R2G/003P-4 – 3,0 kW GD350A (Normal Duty) –
4,0 kW GD20-004G-4-EU – 4,0 kW GD20-EU – GD350A-004G/5R5P-4 – 4,0 kW GD350A (Heavy Duty)
5,5 kW GD20-5R5G-4-EU – 5,5 kW GD20-EU GD350A-004G/5R5P-4 – 5,5 kW GD350A (Normal Duty) GD350A-5R5G/7R5P-4 – 5,5 kW GD350A (Heavy Duty)
7,5 kW GD20-7R5G-4-EU – 7,5 kW GD20-EU GD350A-5R5G/7R5P-4 – 7,5 kW GD350A (Normal Duty) GD350A-7R5G/011P-4 – 7,5 kW GD350A (Heavy Duty)
11 kW GD20-011G-4-EU – 11 kW GD20-EU GD350A-7R5G/011P-4 – 11 kW GD350A (Normal Duty) GD350A-011G/015P-4 – 11 kW GD350A (Heavy Duty)
15 kW GD20-015G-4-EU – 15 kW GD20-EU GD350A-011G/015P-4 – 15 kW GD350A (Normal Duty) GD350A-015G/018P-4 – 15 kW GD350A (Heavy Duty)
18,5 kW GD20-018G-4-EU – 18,5 kW GD20-EU GD350A-015G/018P-4 – 18,5 kW GD350A (Normal Duty) GD350A-018G/022P-4 – 18,5 kW GD350A (Heavy Duty)
22 kW GD20-022G-4-EU – 22 kW GD20-EU GD350A-018G/022P-4 – 22 kW GD350A (Normal Duty) GD350A-022G/030P-4 – 22 kW GD350A (Heavy Duty)
30 kW GD20-030G-4-EU – 30 kW GD20-EU GD350A-022G/030P-4 – 30 kW GD350A (Normal Duty) GD350A-030G/037P-4 – 30 kW GD350A (Heavy Duty)
37 kW GD20-037G-4-EU – 37 kW GD20-EU GD350A-030G/037P-4 – 37 kW GD350A (Normal Duty) GD350A-037G/045P-4 – 37 kW GD350A (Heavy Duty)
45 kW GD20-045G-4-EU – 45 kW GD20-EU GD350A-037G/045P-4 – 45 kW GD350A (Normal Duty) GD350A-045G/055P-4 – 45 kW GD350A (Heavy Duty)
55 kW GD20-055G-4-EU – 55 kW GD20-EU GD350A-045G/055P-4 – 55 kW GD350A (Normal Duty) GD350A-055G/075P-4 – 55 kW GD350A (Heavy Duty)
75 kW GD20-075G-4-EU – 75 kW GD20-EU GD350A-055G/075P-4 – 75 kW GD350A (Normal Duty) GD350A-075G/090P-4 – 75 kW GD350A (Heavy Duty)
90 kW GD20-090G-4-EU – 90 kW GD20-EU GD350A-075G/090P-4 – 90 kW GD350A (Normal Duty) GD350A-090G/110P-4 – 90 kW GD350A (Heavy Duty)
110 kW GD20-110G-4-EU – 110 kW GD20-EU GD350A-090G/110P-4 – 110 kW GD350A (Normal Duty) GD350A-110G/132P-4 – 110 kW GD350A (Heavy Duty)
132 kW – GD350A-110G/132P-4 – 132 kW GD350A (Normal Duty) GD350A-132G/160P-4 – 132 kW GD350A (Heavy Duty)
160 kW – GD350A-132G/160P-4 – 160 kW GD350A (Normal Duty) GD350A-160G/185P-4 – 160 kW GD350A (Heavy Duty)
185 kW – GD350A-160G/185P-4 – 185 kW GD350A (Normal Duty) GD350A-185G/200P-4 – 185 kW GD350A (Heavy Duty)
200 kW – GD350A-185G/200P-4 – 200 kW GD350A (Normal Duty) GD350A-200G/220P-4 – 200 kW GD350A (Heavy Duty)
220 kW – GD350A-200G/220P-4 – 220 kW GD350A (Normal Duty) GD350A-220G/250P-4 – 220 kW GD350A (Heavy Duty)
250 kW – GD350A-220G/250P-4 – 250 kW GD350A (Normal Duty) GD350A-250G/280P-4 – 280 kW GD350A (Heavy Duty)
280 kW – GD350A-250G/280P-4 – 280 kW GD350A (Normal Duty) GD350A-280G/315P-4 – 280 kW GD350A (Heavy Duty)
315 kW – GD350A-280G/315P-4 – 315 kW GD350A (Normal Duty) GD350A-315G/355P-4 – 315 kW GD350A (Heavy Duty)
355 kW – GD350A-315G/355P-4 – 355 kW GD350A (Normal Duty) GD350A-355G/400P-4 – 355 kW GD350A (Heavy Duty)
400 kW – GD350A-355G/400P-4 – 400 kW GD350A (Normal Duty) GD350A-400G/450P-4 – 400 kW GD350A (Heavy Duty)
450 kW – GD350A-400G/450P-4 – 450 kW GD350A (Normal Duty) GD350A-450G/500P-4 – 450 kW GD350A (Heavy Duty)
500 kW – GD350A-450G/500P-4 – 500 kW GD350A (Normal Duty) GD350A-500G-4 – 500 kW GD350A (Heavy Duty)

Application-Specific Engineering Recommendations

1. HVAC Systems and Fans

  • Recommend GD20-EU drives for standard fans and small chillers.

  • Use built-in STO and EMC filters for compliance and reduced interference.

  • Suggest soft-start ramp times to reduce mechanical stress and prevent water hammer in pumps.

2. Industrial Pumping Applications

  • GD20-EU (up to 110 kW) works well for small to medium pumps; GD350A for high-power or multi-pump systems.

  • Braking choppers recommended for variable load pumps or rapid deceleration.

  • Provide tips for pump curve matching and avoidance of cavitation.

3. Conveyors and Material Handling

  • GD350A preferred for precise speed or torque control.

  • Recommend encoder feedback for synchronization of multiple drives.

  • Offer guidance on load inertia calculations and overload protection settings.

4. High-Precision Industrial Machinery

  • Use GD350A with vector control for tasks requiring exact speed, torque, or position.

  • Guidance on feedback selection (resolver vs. encoder) and tuning parameters.

  • Include notes on thermal management for continuous high-power operation.

5. Harsh Environment Considerations

  • For dusty, high-vibration, or outdoor installations:

    • GD350A recommended for wider temperature tolerance.

    • IP-rated enclosures and optional DC reactors suggested for power quality stability.

  • Advice on routine maintenance and parameter monitoring for long-term reliability.

GD20-EU vs GD350A – Which Drive Fits Your Application?

Model Power Range Typical Applications Key Features Expandability
GD20-EU 0.75–110 kW Pumps, fans, HVAC, conveyors Compact, cost-effective, STO, EMC filter, braking chopper –
GD350A 1.5–500 kW Complex industrial applications, precise motor control Advanced vector control, multi-communication, EMC filter Fieldbus cards, encoder modules, PLC, Wi-Fi/Bluetooth

Why Choose INVT 400V VFDs?

  • Energy Efficiency: Save electricity through precise motor speed control and load matching.

  • Motor Protection: Soft start, soft stop, overload protection, and STO functions extend motor life.

  • High Reliability: Rugged construction and tested components ensure stable operation in demanding conditions.

  • Application Flexibility: Suitable for pumps, fans, conveyors, industrial machinery, and complex automation tasks.

  • Compliance: INVT drives meet international standards and best engineering practices, providing engineers with trusted, field-proven solutions.

Installation and Maintenance Tips

  • Ensure proper ventilation and airflow around the VFD.

  • Use shielded motor cables to minimize EMC interference.

  • Configure braking choppers and DC reactors according to motor size and load requirements.

  • Leverage built-in diagnostics for predictive maintenance and system monitoring.

  • Regularly inspect connections, environmental conditions, and cooling systems.

Frequently Asked Questions (FAQ) – 400V VFDs

Q1: What is a 400V VFD and why is it used?
A 400V Variable Frequency Drive (VFD) controls the speed, torque, and direction of three-phase motors supplied with 400V. It is ideal for medium- and high-power industrial applications, providing energy efficiency, smooth motor start/stop, and precise process control.

Q2: How do I choose between the GD20-EU and GD350A series?

  • GD20-EU: Compact, cost-effective, suitable for pumps, fans, HVAC, and conveyors up to 110 kW.

  • GD350A: Advanced vector control, supports precise speed, torque, and position control, suitable for complex industrial machinery and high-power applications (up to 500 kW).

Q3: Can 400V VFDs control both asynchronous and synchronous motors?
Yes. GD350A supports both asynchronous (induction) and synchronous (permanent magnet) motors with or without encoder feedback. GD20-EU is optimized for standard asynchronous motors.

Q4: Are these VFDs suitable for heavy-duty or harsh environments?
Yes. GD350A models feature robust design, wide temperature tolerance, vibration resistance, optional IP-rated enclosures, and integrated EMC filters. GD20-EU is suitable for standard industrial and building applications.

Q5: What protection and safety features do these VFDs offer?
Both GD20-EU and GD350A include:

  • STO (Safe Torque Off) SIL2/SIL3

  • Overload protection up to 200% of nominal current

  • Short-circuit, overvoltage, and undervoltage protection

  • Braking choppers for rapid deceleration (up to 37 kW for GD20-EU)

Q6: Can multiple VFDs be networked for automation or PLC integration?
Yes. GD350A supports multi-communication protocols (Ethernet, CANopen, Profibus, Profinet, EtherCAT) and expansion modules for feedback interfaces, additional I/O, and PLC integration. GD20-EU can also be integrated for simpler automation setups.

Q7: How does a 400V VFD save energy?
By adjusting the motor speed to match real demand, VFDs reduce energy consumption compared to running motors at full speed continuously. Applications include pumps, fans, and conveyors where loads fluctuate.

Q8: What maintenance is required for 400V VFDs?
VFDs are low-maintenance, but regular inspections are recommended:

  • Check for dust, moisture, or vibration in enclosures

  • Verify cooling fans and heat sinks

  • Monitor error logs and parameter settings for optimal performance

Q9: Can these drives be used for applications requiring precise positioning or torque control?
Yes. GD350A supports advanced vector control, making it suitable for conveyor synchronization, lifting systems, and machinery requiring precise speed, torque, or position regulation.

Q10: Where can I find detailed technical specifications for each model?
You can access specifications for all GD20-EU and GD350A models in the motor power selection table on this page or by visiting the individual product pages linked within the table.

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