400V Three-Phase VFDs – Industrial Frequency Inverters (0.75kW to 500kW)

Longvista provides high-performance INVT 400V Variable Frequency Drives engineered for the Swiss industrial sector. Our portfolio spans from compact 0.75kW units for standard pump and fan control to heavy-duty 500kW systems designed for complex manufacturing and process automation.

  • Standard Industrial (GD20-EU): Reliable 0.75kW – 110kW drives with integrated safety and compact footprints.

  • High-Performance (GD350A): Advanced vector control and expansion options for dynamic, high-torque applications.

  • Swiss Support: All units are backed by local technical expertise and stocked in Caslano for fast nationwide delivery.

Browse our 400V range below or consult our selection guide for technical sizing:

400V Selection Guide & Power Ratings

Expert Sizing Tip: Industrial 400V motors are often “Dual-Rated.” Ensure you distinguish between Heavy Duty (G) for constant torque and Normal Duty (P) for variable torque to avoid premature drive wear.

1. Understanding G/P (Dual-Rating) Specifications

Unlike standard 230V drives, our 400V range features a dual-rating system to optimize cost and performance:

  • Heavy Duty (G-Rating): Designed for high-inertia loads like conveyors, mixers, and extruders. It offers 150% overload for 60 seconds.

  • Normal Duty (P-Rating): Optimized for centrifugal loads like fans and pumps. Since these require less starting torque, a single VFD can often power a larger motor in this mode.

  • Example: The GD350A-5R5G/7R5P-4 is rated for 5.5 kW in Heavy Duty applications, but can support up to 7.5 kW in Normal Duty (Pump/Fan) applications.

GD20-EU vs. GD350A: Finding the Right 400V Series

Determining which series to choose depends on your application’s complexity and the type of motor control required.

Feature GD20-EU Series (Standard) GD350A Series (Advanced)
Best For Pumps, Fans, Basic Conveyors Heavy Industry, Precision Lifting, Automation
Control Mode Sensorless Vector Control (SVC) Full Closed-Loop Vector Control
Motor Support Standard Induction (Asynchronous) Induction, PM Motors, Synchronous
Expandability None (Fixed I/O) 3 Expansion Slots (Fieldbus, Encoder, PLC)
Safety STO SIL2 / SIL3 (Built-in) STO SIL2 / SIL3 + Safety Expansion Options
Communications Modbus/RS485 Profinet, EtherCAT, CANopen, Ethernet/IP

The “Rule of Thumb” for Selection:

  • Choose the GD20-EU if you are replacing a standard drive for a pump or fan and don’t need to communicate with a complex PLC network.

  • Choose the GD350A if you need high starting torque (Constant Torque), require encoder feedback for positioning, or need to integrate the drive into an Industry 4.0 Profinet/EtherCAT network.

Selection by Motor Power

All models listed are for 400V Three-Phase Input/Output.

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)

Note: For motors exceeding 110 kW, the GD350A is the industrial standard, offering enhanced thermal management and vibration resistance.

Industrial Engineering & Automation Integration

Industry 4.0 Ready: The 400V series, particularly the GD350A, is designed to be the “heart” of your automated system. We provide the communication protocols and control precision required for modern Swiss manufacturing.

1. High-Performance Control Modes

The 400V range offers sophisticated motor management beyond simple speed control:

  • Advanced Vector Control: Essential for high-torque loads and precision machinery.

  • Closed-Loop Operation: By adding an encoder expansion card to the GD350A, you achieve exact positioning and zero-speed torque—critical for cranes, hoists, and synchronized conveyors.

  • Synchronous & PM Motor Support: Future-proof your installation. The GD350A supports high-efficiency Permanent Magnet motors, helping facilities meet the strictest Swiss energy targets.

2. Communication & Fieldbus Integration

In our experience at Longvista, modern Swiss industrial environments often require seamless data exchange. The GD350A features three hardware expansion slots to support:

  • Profinet & EtherCAT: The standard for Siemens and Beckhoff-based automation systems in Switzerland.

  • Ethernet/IP & CANopen: Ideal for decentralized control and multi-drive coordination.

  • Modbus RTU: Integrated as standard across both the GD20-EU and GD350A series for basic PLC communication.

3. Advanced Application Engineering

  • Lifting & Hoisting: Utilize the GD350A’s dedicated brake control logic and high-overload capacity (200% for 1s) for safe and smooth vertical transport.

  • Extruders & Mixers: Maintain constant torque at low speeds with optimized thermal management for continuous heavy-duty cycles.

  • Multi-Pump Control: Configure master-slave sets for large-scale water treatment or municipal pumping stations to balance wear and maximize efficiency.

4. Harmonics & Power Quality

In high-power installations (above 37 kW), power quality is a priority for Swiss grid compliance:

  • Integrated DC Reactors: Available on higher-power models to reduce harmonic distortion and protect the drive’s internal components.

  • Shielded Cable Guidance: We provide technical recommendations on grounding and shielding to ensure your 400V installation meets all local EMC directives.

Why Longvista & INVT for 400V Projects?

Your Partner for Industrial Uptime: High-power applications require more than just hardware. They require a partner who understands the safety, compliance, and logistics of the Swiss industrial landscape.

1. Industrial Stock in Ticino

We often see that large projects and emergency replacements cannot wait for international shipping.

  • Warehouse in Caslano: We maintain a strategic inventory of 400V drives, from compact 0.75 kW units up to high-power industrial models.

  • Reliable Logistics: Direct shipping within Switzerland ensures your equipment arrives on-site without customs complications or unexpected fees.

2. Safety & Swiss Compliance (SUVA/IEC)

Safety is non-negotiable in 400V environments. Our INVT drives are engineered to meet the highest European and Swiss safety standards:

  • STO (Safe Torque Off): Integrated SIL2/SIL3 STO functions allow for seamless integration into your emergency stop circuits and machinery safety systems.

  • EMC Compliance: Integrated filters across our 400V range ensure that your high-power drives do not disrupt sensitive control electronics or communication networks.

3. Engineering Support for Large-Scale Systems

We often see customers in Ticino asking for technical support on configuration and installation. Hence, from 1.5 kW to 500 kW, we provide the technical depth required for complex installations:

  • Sizing & Specification: Not sure if you need the GD20-EU or the GD350A? Our engineers provide free consultations to ensure you select the drive with the correct duty rating (Normal vs. Heavy Duty).

  • Communication Setup: We assist with the configuration of Fieldbus expansion cards (Profinet, EtherCAT, etc.) to ensure your VFD talks perfectly to your PLC.

4. Long-Term Reliability & Warranty

Longvista stands behind every INVT drive with local Swiss warranty support. We ensure long-term availability of spare parts and expansion modules, protecting your investment for years to use.

Frequently Asked Questions (FAQ) – 400V VFDs

Q1: How do I determine if I need a GD20-EU or a GD350A for my 400V application? A: It depends on control complexity. Choose the GD20-EU for standard centrifugal loads (fans, pumps) up to 110kW. Upgrade to the GD350A if you require closed-loop feedback (encoders), high starting torque for heavy loads, or need to connect the drive to a Profinet/EtherCAT automation network.

Q2: Does the 400V series support both Induction and Permanent Magnet (PM) motors? A: The GD350A series is designed for maximum flexibility, supporting both standard asynchronous induction motors and high-efficiency Synchronous/PM motors. This is ideal for facilities upgrading to IE4 or IE5 efficiency standards.

Q3: What safety certifications are included for Swiss industrial compliance? A: Both the GD20-EU and GD350A are equipped with STO (Safe Torque Off) rated at SIL2/SIL3. This ensures the drives meet the strict machinery safety requirements (SUVA/IEC standards) used across Swiss manufacturing and processing plants.

Q4: Can I integrate these drives into a Siemens or Beckhoff PLC system? A: Yes. While both series support Modbus, the GD350A features three expansion slots for dedicated Fieldbus cards including Profinet, EtherCAT, and Ethernet/IP, allowing for seamless integration into modern TIA Portal or TwinCAT environments.

Q5: What is the benefit of the “Heavy Duty” rating on the 400V drives? A: Our Heavy Duty (G-rated) configuration allows for a 150% overload for 60 seconds and 200% for 1 second. This is critical for applications with high “breakaway torque” requirements, such as loaded crushers, mixers, or vertical lifting systems.

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