Front view of 22 kW VFD – INVT GD350A three-phase 400V inverter
Front view of 22 kW VFD – INVT GD350A three-phase 400V inverter
Right side of INVT 22 kW VFD – GD350A model
Left side of 22kW 3-phase 400V inverter – INVT GD350A
Top view of INVT GD350A 22kW 400V inverter
Bottom view of INVT GD350A 22 kW 3-phase inverter

INVT GD350A 22 kW VFD | 400 V 3-Phase Inverter (Dual-Rating)

CHF 1,055.00 excl. VAT, free Shipping

  • Power Rating: 22 kW (Normal Duty) / 18.5 kW (Heavy Duty)

  • Input Voltage: 3-Phase 400V AC

  • Control Modes: Vector Control (VC), Sensorless Vector Control (SVC), Advanced I/F

  • High Starting Torque: 150% at 0.25 Hz (asynchronous), up to 200% at 0 Hz (synchronous)

  • Speed Control Accuracy: ±0.2% (SVC), ±0.02% (VC); Position Accuracy: ±1 pulse

  • Auto Motor Tuning: Supports asynchronous & synchronous motors

  • Safety: Integrated STO (Safe Torque Off), 30+ fault protections

  • Overload Capacity: 150% for 1 minute, 180% for 10 seconds, 200% for 1 second

  • Braking: Built-in regenerative brake, dynamic, DC, magnetic, and short-circuit braking

  • Connectivity: Modbus RTU standard, optional CANopen, Profibus, Profinet

  • Wireless Ready: Optional Bluetooth/WiFi for remote control via INVT App

  • I/O Interfaces: 4 digital inputs, 2 analog inputs, 2 analog outputs, 2 relay outputs, pulse inputs/outputs

  • User Interface: LCD control panel, USB for data and diagnostics

  • Expandability: 3 expansion slots for I/O, PLC, feedback, and communication modules

  • Applications: HVAC, pumps, conveyors, packaging, textiles, water treatment, renewable energy

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SKU: GD350A-018G/022P-4 Category: Tag:

Description

The INVT GD350A 22 kW three-phase inverter is engineered for industrial-grade motor control, combining high torque, precision speed and position regulation, and exceptional reliability. With dual ratings — 22 kW for normal duty and 18.5 kW for heavy-duty applications — the GD350A 22 kW excels in demanding environments such as HVAC systems, pumps, conveyors, and automated machinery.

Designed for flexibility, it supports advanced vector control modes, integrated braking, and optional fieldbus communication for seamless industrial integration.

Key Specifications

  • Power Rating: 22 kW (Normal Duty) / 18.5 kW (Heavy Duty)

  • Rated Voltage: 3-Phase 400V AC

  • Control Modes: Vector control (VC), Sensorless vector control (SVC), and torque control with enhanced I/F algorithms

Unmatched Motor Control & Performance

The INVT GD350A 22 kW delivers consistent torque and fine speed regulation, even at near-zero speeds. Whether driving pumps, conveyors, or machine tools, it ensures:

  • Starting Torque:

    • Asynchronous motor: 0.25Hz / 150%

    • Synchronous motor: 0Hz / 200%

  • Speed Accuracy:

    • ±0.2% in SVC mode

    • ±0.02% in VC mode

  • Torque Control Accuracy: 10% (SVC), 5% (VC)

  • Motor Auto-Tuning: Supports both asynchronous and synchronous motors, optimizing performance while minimizing skin effect losses

Built for Demanding Applications

The GD350A 22 kW is engineered for uninterrupted operation and high-load endurance:

  • Overload Capacity:

    • 150% for 60s

    • 180% for 10s

    • 200% for 1s

  • Voltage and Current Stability: Intelligent algorithms prevent overvoltage trips, surges, and motor stress

  • Uninterrupted Operation: Keeps motors running during brief power outages using stored energy — critical in sectors like textiles and food processing

  • Built-in Braking System: Includes dynamic, DC, magnetic, and short-circuit braking with an integrated regenerative brake for enhanced safety and energy recovery

  • Integrated DC Reactor: Improves power factor, reduces harmonic distortion, and enhances overall energy efficiency and system stability

Integrated Safety & EMC Protection

  • Safe Torque Off (STO): Built-in safety function that immediately disables motor torque output to meet machine safety standards

  • EMC Filter (C3): Integrated filter minimizes electromagnetic interference without needing extra space

Connectivity & Control Options

The GD350A 22 kW offers flexible interface and communication capabilities:

  • Standard Communication: Modbus RTU

  • Optional Networking: CANopen, Profibus DP, Profinet, and more

  • Versatile I/Os:

    • 4 digital inputs

    • 2 high-speed pulse inputs

    • 2 analog inputs

    • Multiple output options (analog, relay, high-speed pulse)

  • USB Interface: Easily upload/download parameter settings or analyze operation curves

  • PC Connectivity: Supports USB-RS485, Ethernet, and cloud-based UDP/MQTT for remote monitoring

IoT-Enabled & Expandable

Stay connected and adaptable with modern automation needs:

  • Wireless Remote Monitoring: Add optional Bluetooth or WiFi modules and control the drive via the INVT-Workshop mobile app (30m range)

  • Expandable Architecture: 3 extension slots for I/O cards, feedback modules, communication interfaces, or mini PLC functions

  • Built-In PLC: 128kB memory for custom control logic and automation sequences

Ideal for Versatile Industrial Applications

From HVAC systems and industrial pumps to textile machines, conveyors, and renewable energy systems, The GD350A 22 kW ensures reliable performance, improved productivity, and energy-efficient operation in:

  • Manufacturing & Automation

  • Water/Wastewater Treatment

  • Packaging & Process Industries

  • Food & Beverage

  • Chemical & Textile Plants

  • Machine Tools & Material Handling

Why Choose the INVT GD350A 22 kW?

  • Superior torque at low speeds

  • Precise control with advanced vector algorithms

  • Rich I/O and communication interfaces

  • Safe and uninterrupted operation under harsh conditions

  • Fully customizable with optional modules

  • Seamless integration with industrial control systems

See our full range of 400 V variable frequency drives, covering all power ratings from 0.75 to 500 kW.

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Additional information

Brake Chopper

Communication Protocols

Ethernet/IP, Profinet, CAN Master/Slave, etc. (extension card is needed), Modbus RTU & ASCII
Control Methods

SVPWM, SVC (Sensorless Vector Control), VC (Vector Control with Encoder)
Dual Rating Capability

Dual Rating
EMC Filter

Input Voltage

Motor Compatibility

Asynchronous Motors, Synchronous motors
Mounting Type

Wall and Flange Mounting
Safety Features

User Interface

Multi-function LCD keypad

Specification

P (Normal Duty) Motor Rated Power 22
Rated Current 45
G (Heavy Duty) Motor Rated Power 18.5
Rated Current 38
Line Voltage, Frequency AC 3-ph. 380 V … 440 V (-15% … +10%), 50 Hz/60 Hz (± 5%)
Output Voltage 3-ph. 0 V … 480 V (max. input voltage)
Overload Capacity 150% for 60s in G setting (Heavy Duty), 120% for 60s in P setting (Normal Duty)
Output Frequency 0 … 590 Hz
Control Inputs  Analog: 2 inputs (AI1: 0 … 10 V / 0(4) … 20 mA; AI2: -10 … 10 V), optionally expandable
Digital: 6 programmable inputs, including 2 high-speed inputs (50 kHz) for speed setpoint or actual value via incremental or pulse encoders, optionally expandable
Control Outputs  Analog: 1 programmable output 0 … 10 V / 0(4) … 20 mA, optionally expandable
Digital: 2 programmable outputs, one of them high-speed (50 kHz), potential-free, optionally expandable
Relays: 2 programmable changeover contacts (NO/NC), optionally expandable
Interfaces RS485 (terminals) as standard, up to 3 freely configurable option interfaces for communication modules, terminal expansions, feedbacks, and PLC cards
Brake Chopper Integrated
EMC Filter Integrated IEC61800-3 C3; IEC61800-3 C1 & C2 optional
DC Reactor Integrated
Safety Functions Two-channel STO (Safe Torque Off) (IEC61800-5-2, SIL2, PL “d”)
Protection Rating IP20, optional IP55
Ambient Temperature -10°C … +50°C; power reduction required if ambient temperature exceeds +40°C, air cooling
Certification CE, TÜV
Dimensions / Weight 200 mm x 340.6 mm x 208 mm / 10.5 kg

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FAQ

1. What is the difference between Normal Duty and Heavy Duty ratings for the INVT GD350A 22 kW?
The INVT GD350A 22 kW offers dual ratings:

  • Normal Duty (22 kW) – ideal for variable torque loads like fans and pumps.

  • Heavy Duty (18.5 kW) – for constant torque applications such as conveyors and compressors requiring high torque at low speeds.

2. Can the INVT GD350A 22 kW handle high starting torque?
Yes. The GD350A 22 kW delivers:

  • 150% torque at 0.25 Hz for asynchronous motors

  • Up to 200% torque at 0 Hz for synchronous motors
    This ensures reliable startup even under heavy load conditions.

3. Which types of motors can the GD350A 22 kW control?
This model supports both:

  • Asynchronous (induction) motors

  • Synchronous motors
    Its built-in auto-tuning function optimizes performance for each motor type.

4. What built-in safety features does the GD350A 22 kW include?

  • Safe Torque Off (STO) for emergency stop compliance

  • Protection against overvoltage, undervoltage, overload, phase loss, and overheating

  • Uninterrupted operation during short power interruptions

5. Does the INVT GD350A 22 kW support regenerative braking?
Yes. It includes a built-in braking chopper and supports:

  • Dynamic braking

  • DC injection braking

  • Magnetic braking

  • Short-circuit braking
    The system can also recycle braking energy to improve efficiency.

6. Which industrial applications is the GD350A 22 kW suitable for?
Ideal for:

  • HVAC systems (ventilation, air handlers)

  • Industrial pumps and fans

  • Conveyors and belt-driven systems

  • Textile machinery

  • Packaging equipment

  • Food processing lines

  • Water/wastewater treatment

  • Renewable energy integration

7. Is the GD350A 22 kW compatible with industrial communication networks?
Yes. It supports:

  • Modbus RTU (default)

  • Optional CANopen, Profibus DP, Profinet fieldbus modules

  • Wireless monitoring via Bluetooth or Wi-Fi (with optional card) using the INVT Workshop App

8. How easy is it to commission and operate the GD350A 22 kW?

  • Intuitive LCD control panel with multi-language support

  • USB interface for data backup and curve analysis

  • 128 kB PLC memory for custom automation logic

  • Flexible PC interface via USB-RS485, Ethernet, or UDP/MQTT

9. Can the GD350A 22 kW be expanded for additional functionality?
Yes. Three expansion slots allow:

  • I/O extension cards

  • Feedback modules

  • Communication interfaces

  • Mini PLC cards
    This modularity supports customization for your specific application.

10. Why choose the INVT GD350A 22 kW over other 22 kW VFDs?

  • Dual-duty rating for versatile applications

  • High-precision motor control and low-speed torque performance

  • Built-in safety, braking, and fault protection

  • Modular expandability and intelligent connectivity

  • Wireless remote monitoring capabilities

  • Compact, industrial-grade design backed by INVT engineering

Related Documents

Documentation for INVT GD350A 3-Phase 400V 22 kW:

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