INVT GD20-018G-4 Compact High Power Energy Saving VFD

The INVT GD20-018G-4 is a compact, high-power, energy-saving Variable Frequency Drive (VFD) engineered for demanding industrial applications. This VFD delivers exceptional performance through its advanced control algorithms, robust design, and intelligent features, making it a leading choice for enhancing operational efficiency and reducing energy consumption. Key advantages include its superior power density, versatile control modes, and comprehensive protection functions. The GD20-018G-4 boasts a rated power of 18.5 kW, a 3-phase input voltage of 380-460V AC, and a robust output current rating of 40A, all packaged in a compact form factor designed for easy integration. Its advanced features, such as a built-in braking unit, multiple programmable digital and analog I/O, and support for various communication protocols, position it as a highly adaptable solution for a wide array of industrial automation challenges.

Product Specifications

| Parameter          | Value                               |

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

| Model              | GD20-018G-4                         |

| Rated Power        | 18.5 kW (25 HP)                     |

| Input Voltage      | 380-460V AC (3-Phase)               |

| Output Voltage     | 380-460V AC (3-Phase)               |

| Rated Output Current | 40A                                 |

| Frequency Range    | 0-400 Hz                            |

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

| Overload Capacity  | 150% for 60s, 180% for 30s          |

| Protection Features| Overvoltage, Undervoltage, Overload, Overheating, Short Circuit, etc. |

| Braking Unit       | Built-in                            |

| Ambient Temperature| -10°C to 40°C                       |

| Dimensions (H x W x D)| 304mm x 200mm x 170mm               |

Core Features & Market Positioning

The INVT GD20-018G-4 distinguishes itself in the competitive VFD market through its sophisticated sensorless vector control, providing precise speed and torque regulation even under fluctuating loads. This advanced control capability ensures optimal motor performance and efficiency across a broad spectrum of applications. Its compact design is a significant advantage, allowing for higher power density and simplified installation in space-constrained control cabinets, a crucial factor for system integrators and machine builders. Furthermore, the inclusion of a built-in braking unit as standard on this model enhances deceleration capabilities and provides inherent safety, reducing the need for external braking resistors in many applications and further optimizing installation space and cost. The GD20 series, including the GD20-018G-4, is recognized for its robust build quality and reliability in harsh industrial environments, positioning it as a cost-effective and high-performance solution for general-purpose industrial drives.

Key Application Scenarios

The versatility of the INVT GD20-018G-4 makes it an ideal choice for a wide range of industrial sectors. In the pump and fan industry, its energy-saving features and precise flow control capabilities contribute to significant operational cost reductions. For conveyor systems and material handling equipment, the drive's accurate speed and torque control ensures smooth acceleration and deceleration, preventing product damage and optimizing throughput. It is also highly effective in machine tool applications, where precise positioning and dynamic response are critical for manufacturing accuracy. Other key applications include textile machinery, packaging equipment, and general industrial automation processes requiring reliable and efficient motor speed control. The drive's ability to operate effectively in ambient temperatures ranging from -10°C to 40°C further broadens its applicability across diverse climatic conditions.

Practical System Integration Guidance

Integrating the INVT GD20-018G-4 into existing industrial systems is streamlined due to its user-friendly design and comprehensive connectivity options. The drive supports flexible wiring configurations for both power and control circuits. For control wiring, utilizing shielded twisted-pair cables for analog inputs and outputs, as well as digital inputs, is recommended to minimize electromagnetic interference (EMI). Parameter programming can be efficiently managed via the integrated keypad and LCD display, or remotely using INVT's dedicated software tools. The GD20-018G-4 supports standard communication protocols like Modbus RTU, allowing seamless integration into SCADA systems and PLCs. For a typical setup, connecting the 3-phase power supply to the L1, L2, L3 terminals and the motor to T1, T2, T3 is fundamental. Ensuring proper grounding of both the drive and the motor is paramount for safety and performance.

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD20-018G-4 requires adherence to recommended practices and understanding of its protective functions. The drive incorporates multiple protection mechanisms, including overvoltage, undervoltage, overload, and over-temperature protection, which automatically safeguard the motor and the drive itself from potential damage. Critical error codes, such as E.OC (Overcurrent), E.OV (Overvoltage), and E.OH (Overheating), should be promptly addressed by consulting the user manual for specific troubleshooting steps. To mitigate risks, ensure the drive is installed in a well-ventilated area, away from excessive dust and corrosive substances. Regular inspection of terminal connections and motor windings for wear or damage is also advised. Always follow lockout/tagout procedures before performing any maintenance or wiring adjustments.

Scalability & Long-Term Value

The INVT GD20-018G-4 offers significant scalability and long-term value for industrial operations. Its robust construction and advanced firmware are designed for durability, minimizing the need for frequent replacements. The drive's compatibility with various communication protocols facilitates integration into evolving automation architectures, including those supporting Industry 4.0 initiatives and IIoT platforms, enabling remote monitoring, diagnostics, and predictive maintenance. Firmware updates can be readily applied to enhance functionality and adapt to new industrial standards, further extending the product's lifecycle. For systems requiring higher power or specific functionalities, the GD20 series offers a range of models, allowing for a consistent control philosophy and programming approach as needs grow, ensuring a smooth upgrade path without extensive re-engineering.

Frequently Asked Questions (FAQs)

1. What are the primary benefits of using the INVT GD20-018G-4 VFD?

The GD20-018G-4 offers significant energy savings through precise speed control, reducing electricity consumption.

Its advanced sensorless vector control ensures excellent motor performance and torque response.

The compact design and built-in braking unit simplify installation and reduce cabinet space.

2. How does the GD20-018G-4 handle different motor types?

This VFD supports both V/f control and sensorless vector control modes for broad compatibility.

It is suitable for controlling standard 3-phase asynchronous motors commonly used in industry.

Users can fine-tune parameters to optimize performance for specific motor characteristics and applications.

3. What are the typical application areas for the INVT GD20-018G-4?

It is widely used for pumps, fans, and HVAC systems to optimize fluid dynamics.

Conveyor belts, material handling, and packaging machinery benefit from its precise motion control.

Machine tools and general industrial automation processes requiring variable speed are also key applications.

4. Can the GD20-018G-4 be integrated into a networked industrial system?

Yes, it supports common industrial communication protocols like Modbus RTU.

This allows seamless integration with PLCs, HMIs, and SCADA systems for centralized control.

Remote monitoring and diagnostic capabilities can be enabled through these network connections.

5. What are the key safety features of the GD20-018G-4?

The VFD includes comprehensive protection against overvoltage and undervoltage faults.

It provides robust overload protection to prevent motor and drive damage from excessive current.

Overheating protection and short-circuit detection ensure operational safety.

6. How is the GD20-018G-4 installed and commissioned?

Ensure proper grounding of the drive and motor for safe operation.

Connect power supply to input terminals and motor to output terminals as per the manual.

Parameter configuration can be done via the keypad or INVT's PC software.

7. What is the expected lifespan and reliability of this VFD?

The GD20-018G-4 is built with high-quality components for industrial durability.

Regular maintenance and adherence to operating conditions ensure long-term reliability.

Its robust design protects against common environmental and electrical stresses.

8. Does the GD20-018G-4 require external components for braking?

This model comes with a built-in braking unit as standard.

This unit dissipates energy during deceleration, improving braking performance.

External braking resistors may still be required for very high inertia loads or frequent heavy braking.

9. How can I troubleshoot common issues with the GD20-018G-4?

Refer to the user manual for a comprehensive list of error codes and their meanings.

Common issues often relate to wiring, parameter settings, or environmental conditions.

Ensure proper ventilation and check all electrical connections for tightness.

10. What are the power and voltage ratings of the GD20-018G-4?

It has a rated power of 18.5 kW (25 HP) for demanding applications.

The input and output voltage range is 380-460V AC, suitable for typical industrial grids.

The drive provides a maximum output current of 40A.