INVT GD20-030G-4 VFD for Medium Duty Fan Drive

The INVT GD20-030G-4 VFD is engineered for demanding medium-duty fan applications, offering superior control and energy efficiency. This Variable Frequency Drive (VFD) boasts a robust design, advanced control algorithms, and a comprehensive feature set tailored for optimal performance in HVAC, industrial ventilation, and other airflow management systems. Key advantages include precise speed regulation, enhanced motor protection, and significant power savings. Its technical specifications highlight a 3.0kW (4HP) power rating, 380-475V AC input voltage range, and an output frequency of up to 400Hz, ensuring versatility across various fan motor requirements. The GD20-030G-4 distinguishes itself with its dedicated fan curve control, built-in EMC filtering, and a user-friendly interface for simplified operation and monitoring.

Product Specifications

| Parameter             | Specification                                |

| :-------------------- | :------------------------------------------- |

| Model                 | GD20-030G-4                                  |

| Power Rating          | 3.0 kW (4 HP)                                |

| Input Voltage         | 380-475V AC (3-Phase)                        |

| Output Voltage        | 0-475V AC (3-Phase)                          |

| Output Frequency      | 0-400 Hz                                     |

| Rated Current         | 7.5 A                                        |

| Control Method        | V/f Control, Sensorless Vector Control       |

| Protection Features   | Overload, Overvoltage, Undervoltage, Short Circuit, Over-temperature, etc. |

| Communication Options | Modbus RTU (standard)                        |

| Operating Temperature | -10°C to +40°C                               |

| Dimensions (HxWxD)    | 214 x 146 x 157 mm                           |

Core Features & Market Positioning

The INVT GD20-030G-4 VFD is strategically positioned as a high-value, reliable solution for medium-duty fan drives, competing effectively with established brands through its blend of advanced features and cost-effectiveness. Its core strength lies in its adaptive control capabilities, particularly its optimized V/f (Voltage/Frequency) control tailored for fan loads, which ensures smooth operation and reduced mechanical stress on the fan assembly. The inclusion of sensorless vector control offers enhanced speed precision and torque response, often surpassing the performance expectations for this class of drive. Furthermore, the GD20 series emphasizes robust motor protection, safeguarding against common electrical disturbances and extending the operational lifespan of connected fan motors, a critical differentiator in industrial environments.

Key Application Scenarios

This VFD is exceptionally well-suited for a wide array of medium-duty fan applications across various industrial and commercial sectors. In the HVAC industry, it provides precise airflow control for chillers, air handling units (AHUs), and exhaust systems, leading to significant energy savings and improved indoor environmental quality. For industrial ventilation, it manages airflow in factories, warehouses, and tunnels, optimizing air exchange rates while minimizing energy consumption. Its capability to handle varying loads makes it ideal for process cooling fans, boiler draft fans, and material handling conveyors where consistent and adjustable airflow is paramount. The GD20-030G-4 also finds utility in agricultural applications for ventilation in greenhouses and livestock facilities, ensuring optimal conditions with minimal operational cost.

Practical System Integration Guidance

Integrating the INVT GD20-030G-4 into existing systems is streamlined due to its standardized mounting and connection interfaces. For wiring, ensure a secure connection to the 3-phase power supply on the input terminals (L1, L2, L3) and to the fan motor on the output terminals (U, V, W), adhering strictly to the indicated voltage and current ratings. Proper grounding is essential for safety and electromagnetic compatibility. Commissioning typically involves configuring basic parameters such as motor data (rated power, voltage, frequency, poles), maximum/minimum frequency limits, and acceleration/deceleration times, often accessible via the integrated keypad or the optional remote keypad. For advanced control, users can leverage the built-in Modbus RTU communication port to integrate the VFD into SCADA systems or Programmable Logic Controllers (PLCs) for remote monitoring and control.

Operation and Risk Mitigation

Safe operation of the INVT GD20-030G-4 VFD involves adhering to electrical safety standards and the manufacturer's guidelines. Before powering on, verify all wiring connections and ensure the enclosure is properly sealed to prevent ingress of dust or moisture, especially in demanding industrial settings. Key operational parameters to monitor include motor temperature, current draw, and voltage levels to prevent exceeding rated limits. Common troubleshooting involves checking for error codes displayed on the VFD; for instance, an "OL" (Overload) fault typically indicates the motor is drawing too much current, requiring an inspection of the fan load or motor itself. An "OV" (Overvoltage) fault might necessitate adjustments to deceleration ramps or an investigation into the power supply quality. Always disconnect power before performing any maintenance or inspection.

Scalability & Long-Term Value

The INVT GD20-030G-4 VFD offers robust scalability and long-term value through its flexible architecture and integration capabilities. Its standardized Modbus RTU communication protocol allows seamless integration with modern industrial automation platforms, including IIoT (Industrial Internet of Things) solutions, enabling advanced data analytics, predictive maintenance, and remote management of fan operations. Compatibility with a wide range of fan motors within its power and voltage class ensures flexibility for future upgrades or replacements. INVT's commitment to product development and firmware updates further enhances the long-term value, ensuring the drive remains relevant with evolving industry standards and technological advancements in motor control and energy management.

Frequently Asked Questions

1. What is the primary application for the INVT GD20-030G-4 VFD?

This VFD is specifically designed for medium-duty fan drives. It excels in applications requiring precise speed control and energy efficiency in airflow management.

It is widely used in HVAC systems for air handling units and exhaust fans. Industrial ventilation in factories and warehouses also benefits greatly from its capabilities.

Its robust design and specialized fan control features make it ideal for ensuring optimal operating conditions across diverse environments.

2. What are the key technical specifications of the GD20-030G-4?

The drive features a 3.0kW (4HP) power rating and operates on a 3-phase 380-475V AC input. Its output frequency can reach up to 400 Hz.

It supports both V/f control and sensorless vector control for versatile motor management. The rated output current is 7.5A.

Safety features include comprehensive protection against overload, overvoltage, undervoltage, and short circuits.

3. How does this VFD contribute to energy savings?

By precisely controlling fan speed according to demand, the VFD significantly reduces energy consumption compared to fixed-speed operation.

Fans running at lower speeds consume exponentially less power, leading to substantial operational cost reductions over time.

The advanced control algorithms optimize motor efficiency, further enhancing energy savings and reducing the carbon footprint of the application.

4. Can the GD20-030G-4 be integrated with other control systems?

Yes, it features a standard Modbus RTU communication port. This allows for seamless integration with PLCs, SCADA systems, and building management systems.

Remote monitoring, control, and data logging are easily achievable through this communication interface. This is crucial for modern industrial automation and IIoT applications.

Integration simplifies system diagnostics and enables centralized control of multiple fan units from a single point.

5. What are the main protection features of this VFD?

The INVT GD20-030G-4 incorporates multiple protection mechanisms. These include overload, overvoltage, and undervoltage protection.

It also provides short-circuit protection and over-temperature protection for both the drive and the motor. These features safeguard equipment longevity.

These built-in safety functions help prevent damage and costly downtime by responding to abnormal operating conditions.

6. What is the typical operating temperature range for this drive?

The VFD is designed to operate reliably within an ambient temperature range of -10°C to +40°C. Proper ventilation is crucial within this range.

Exceeding the upper limit of +40°C can lead to derating or potential shutdown to protect internal components from overheating.

Ensure the installation environment meets these specifications to maintain optimal performance and lifespan.

7. How is this VFD installed and commissioned?

Installation involves mounting the drive in a well-ventilated area and making secure electrical connections according to wiring diagrams. Grounding is critical.

Commissioning includes configuring motor parameters, setting frequency limits, and adjusting acceleration/deceleration times via the keypad or software.

Initial setup is designed to be user-friendly, but consulting the manual ensures all advanced features are optimally configured.

8. What are common fault codes and their meanings?

An "OL" fault typically indicates an overload condition, meaning the motor is drawing excessive current. Check fan load or motor health.

An "OV" fault signifies overvoltage, which might require adjusting deceleration settings or checking the input power supply stability.

Other common codes like "UV" (undervoltage) or "OC" (overcurrent) point to specific electrical issues that need investigation.

9. Does this VFD support advanced motor control methods?

Yes, the GD20-030G-4 supports both V/f control and sensorless vector control. Sensorless vector control offers improved speed accuracy.

This advanced control capability ensures better torque response and more precise speed regulation, especially under varying load conditions.

It provides enhanced performance suitable for more demanding fan applications beyond basic V/f control.

10. What is the long-term value proposition of the INVT GD20-030G-4?

Its robust construction and reliable performance ensure a long operational lifespan, reducing replacement costs. It offers a strong return on investment.

The VFD's compatibility with IIoT platforms and modern automation systems future-proofs its application within evolving smart factory environments.

INVT's ongoing support and potential for firmware updates ensure the drive remains relevant and efficient over many years of service.