GD28 Variable Frequency Drive Overview
The INVT GD28 Series is a next-generation compact general-purpose
Variable Frequency Drive (VFD) launched in 2025, specifically
designed for the global machinery drive market. This series
integrates high performance, compact design, and rich functionality
with international CE and UL certifications.
Key Technical Specifications
| Power Range | Single-phase 200-240V 0.2-4kW
Three-phase 200-240V 0.2-15kW
Three-phase 380-480V 0.4-22kW |
| Overload Capacity | Light Duty: 110% rated current for 60s
Heavy Duty: 150% rated current for 60s |
| Control Modes | V/F control, Sensorless Vector Control (SVC) |
| Starting Torque | 200% starting torque at 0.5Hz |
| Torque Response | <10ms |
| Operating Temperature | Full load operation at 50°C ambient temperature, no derating
required |
Core Features & Benefits
Safety & Reliability with International Certification
- Built-in STO Safety Function: Compliant with SIL3/PLe standards, preventing unintended motor
startup
- Integrated C3 EMC Filter: Meets IEC61800-3 C2/C3 standards, reducing electromagnetic
interference
- Enhanced Environmental Adaptability: PCBA with reinforced coating meets 3C2/3S2 environmental standards
- Independent Air Duct Design: Improves heat dissipation efficiency and overall reliability
Ultra-Compact Design
- Miniaturized Design: Reduces installation space by 35% compared to previous generations
- Side-by-Side Installation: Can be mounted seamlessly when operating temperature is <40°C
- Flexible Mounting Options: Supports DIN rail mounting or two-screw fixing
User-Friendly Commissioning
- Standard Type-C Debugging Interface: Connect to PC without powering up main circuit
- Workshop Debugging Software: Efficient commissioning and monitoring
- Tool-Free Terminals: Spring-type control terminals increase wiring efficiency by 50%
- Plug-in Fan Design: Achieves fan replacement in seconds for easy maintenance
Superior Performance & Multi-Purpose Application
- Multi-Motor Compatibility: Supports asynchronous motors and permanent magnet synchronous
motors
- Dual Rating Modes: Seamlessly switch between light duty and heavy duty modes
- Intelligent Energy Saving: Optimizes current output during light loads
- Built-in Braking Unit: Standard across all models, reducing external equipment needs
- Motor Temperature Detection: Supports PTC, PT100, PT1000 temperature sensors
Flexible Communication & Integration
- Built-in Modbus RTU: Standard Modbus protocol included
- Multi-Protocol Expansion Card: Optional cards support Profinet, EtherCAT, EtherNet/IP, Modbus TCP
- Dual RJ45 Ports: Enables fast device connection using standard Ethernet cables
Product Models by Voltage Class
Single-Phase 200-240V Series (Suffix S2)
| Model Code | Power (kW) | Frame Size | Description |
|---|
| GD28-0R2G-S2 | 0.2 kW | A | Entry-level single-phase drive for small motor control |
| GD28-0R4G-S2 | 0.4 kW | A | Suitable for light equipment such as fans and small conveyors |
| GD28-0R7G-S2 | 0.75 kW | A | Smooth speed regulation for small equipment applications |
| GD28-1R1G-S2 | 1.1 kW | A | Medium-power single-phase model for moderate loads |
| GD28-1R5G-S2 | 1.5 kW | A | Meets heavier light-industrial load requirements |
| GD28-2R2G-S2 | 2.2 kW | B | High-power single-phase drive for complex equipment |
| GD28-004G-S2 | 4.0 kW | B | Maximum power in single-phase series, industrial-grade applications |
Three-Phase 200-240V Series (Suffix 2)
| Model Code | Power (kW) | Frame Size | Description |
|---|
| GD28-0R2G-2 | 0.2 kW | A | Three-phase version for small motor systems |
| GD28-0R4G-2 | 0.4 kW | A | Basic three-phase drive |
| GD28-0R7G-2 | 0.75 kW | A | Suitable for general industrial equipment |
| GD28-1R1G-2 | 1.1 kW | A | Standard model with stable performance |
| GD28-1R5G-2 | 1.5 kW | A | Suitable for conveyors, mixers, etc. |
| GD28-2R2G-2 | 2.2 kW | A | Medium-power industrial applications |
| GD28-004G-2 | 4.0 kW | B | Standard industrial load drive |
| GD28-5R5G-2 | 5.5 kW | C | Higher power model |
| GD28-7R5G-2 | 7.5 kW | C | Suitable for heavy machinery |
| GD28-011G-2 | 11 kW | D | High-power industrial drive |
| GD28-015G-2 | 15 kW | D | Maximum power in three-phase 200V series |
Three-Phase 380-480V Series (Suffix 4)
| Model Code | Power (kW) | Frame Size | Description |
|---|
| GD28-0R4G-4 | 0.4 kW | A | Economical entry-level three-phase 380V model |
| GD28-0R7G-4 | 0.75 kW | A | Common model for industrial HVAC and light equipment |
| GD28-1R1G-4 | 1.1 kW | A | Standard model for general automation |
| GD28-1R5G-4 | 1.5 kW | A | Suitable for conveyors, mixers, pumps |
| GD28-2R2G-4 | 2.2 kW | A | General-purpose model with strong torque |
| GD28-003G-4 | 3.0 kW | A | Suitable for various processing equipment |
| GD28-004G-4 | 4.0 kW | B | Efficient drive for continuous industrial loads |
| GD28-5R5G-4 | 5.5 kW | C | Designed for heavy industrial loads |
| GD28-7R5G-4 | 7.5 kW | C | Stable performance mid-power model |
| GD28-011G-4 | 11 kW | D | Large-capacity industrial drive |
| GD28-015G-4 | 15 kW | D | Suitable for heavy equipment |
| GD28-018G-4 | 18 kW | E | High-performance drive for demanding applications |
| GD28-022G-4 | 22 kW | E | Flagship model with maximum power in series |
Frame Size Reference
| Frame Size | Typical Power Range (380V) | Installation Features |
|---|
| A | 0.4-3.0 kW | Ultra-compact design, supports seamless side-by-side installation |
| B | 4.0 kW | Compact design, supports seamless side-by-side installation |
| C | 5.5-7.5 kW | Standard industrial footprint |
| D | 11-15 kW | Larger chassis for enhanced heat dissipation |
| E | 18-22 kW | Maximum frame size in the series |
Target Applications
| Industry Sector | Specific Applications |
|---|
| Machine Tools | Spindle drive, feed axis control |
| Textile | Textile machinery, chemical fiber equipment |
| Printing & Packaging | Printing presses, packaging lines, labeling machines |
| Food & Beverage | Food processing, conveyors |
| Lithium Battery | Battery production equipment |
| Logistics | Sorting lines, conveyors |
| 3C Electronics | Electronic assembly lines |
| Rubber & Plastics | Extruders, injection molding machines |
| Wire & Cable | Wire drawing machines, stranding machines |
| HVAC | Fans, pumps, air conditioning systems |
Quick Selection Guide
| If you need... | Choose... |
|---|
| Single-phase 220V power supply | S2 suffix models (0.2-4kW) |
| Three-phase 200V power supply | -2 suffix models (0.2-15kW) |
| Three-phase 380V power supply | -4 suffix models (0.4-22kW) |
| Minimal installation space | Frame A models (≤3kW) |
| Seamless side-by-side installation | Frame A & B models |
| Maximum power requirements | Frame E models (18-22kW) |
Award Recognition: On September 25, 2025, during the China International Industry
Fair (CIIF), the GD28 Series was awarded the CEC 2025 Product of the Year - Editors' Choice Award.
Frequently Asked Questions
Q1: I powered up the drive but the fan isn't spinning. Is it
broken?
Don't worry - probably not. The GD28 uses smart temperature
control. The fan won't spin below 36°C, and only runs at full speed
above 69°C. If the heatsink feels warm but not hot, it's working
normally. Still concerned? Check parameter P08.41 (setting the tens
digit to 1 forces temperature-controlled mode on).
Q2: How do I wire this STO function? I see two terminals.
The GD28 uses dual-channel redundant STO (two safety circuits
backing each other up), TÜV-certified to SIL3. Factory default has
STO1 and STO2 shorted to +24V. To use it: Remove those two shorting
wires, connect two normally-closed safety contacts, and both
channels need +24V simultaneously for the drive to run.
Q3: I'm getting E23 or E8 errors. What do they mean?
E23 (Motor Overheat): Either the motor is genuinely hot, or the temperature sensor isn't
connected right. The DI4 terminal on GD28 can accept a PTC
thermistor. Don't forget - there's a DIP switch on the control
board that needs to be switched to "PTC" side.
E8 (Overvoltage): This usually means you're stopping too fast. Solutions: Increase
deceleration time (P00.12) or for loads with inertia, use a braking
resistor (all GD28 models have the braking unit built-in).
Q4: No computer on site. What's the easiest way to copy parameters
to another drive?
Easiest way is the official parameter copier (looks like a USB
stick). Budget-friendly trick: Use an OTG cable + Type-C with your
Android phone. Plug into any Android phone, open the "INVT Debug
Assistant" app, read parameters, save them, upload to another
drive.
Q5: I need Profinet to talk to my PLC. Does this drive support it?
Yes. GD28 comes standard with Modbus RTU. For Profinet, EtherCAT,
or EtherNet/IP, you need to buy and plug in an optional expansion
card.
Note: All models listed above are available for overseas markets and
have obtained CE and UL international certifications. For complete
product manuals, specification comparison sheets, or sample testing
support, please contact us.
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