INVT GD20-055G-4 VFD for High Power Pump Control

The INVT GD20-055G-4 Variable Frequency Drive (VFD) stands as a robust solution for high-power pump control, engineered to deliver exceptional energy efficiency, precise motor management, and superior operational reliability. This 55kW (75HP) VFD is specifically designed to meet the demanding requirements of industrial pumping applications, offering advanced features such as independent heatsink design for enhanced thermal performance, a built-in braking unit for rapid deceleration, and support for multiple communication protocols for seamless integration. Its sophisticated control algorithms ensure optimal performance across a wide range of load conditions, making it an ideal choice for sectors including water treatment, oil and gas, and general industrial processes.

Product Specifications

| Feature                  | Specification                                    |

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

| Model                    | GD20-055G-4                                      |

| Rated Power              | 55 kW (75 HP)                                    |

| Input Voltage            | 3-Phase, 380-460V, 50/60Hz                       |

| Output Voltage           | 0-460V                                           |

| Output Frequency         | 0-400 Hz                                         |

| Overload Capacity        | 150% for 60s, 180% for 10s                         |

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

| Protection Features      | Overcurrent, Overvoltage, Undervoltage, Overtemperature, Phase loss, etc. |

| Braking Unit             | Built-in (standard)                              |

| Cooling Method           | Forced air cooling (independent heatsink design) |

| Communication Ports      | RS485 (standard), optional fieldbus modules      |

| Dimensions (H x W x D)   | 630 x 335 x 247 mm                               |

| Weight                   | Approx. 28 kg                                    |

Core Features & Market Positioning

The INVT GD20-055G-4 distinguishes itself through its independent heatsink design, a critical engineering choice that significantly improves heat dissipation and extends the lifespan of components, even in challenging ambient conditions. This feature directly addresses a common failure point in VFDs operating under continuous high-load scenarios. Furthermore, the inclusion of a standard built-in braking unit provides immediate deceleration capabilities, enhancing safety and control in applications where rapid stops are essential, a premium feature often optional or absent in competing models. Its robust overload capacity, capable of handling 150% for 60 seconds and 180% for 10 seconds, ensures reliable operation during transient load spikes common in pump systems. Market positioning for the GD20 series emphasizes high reliability, advanced control algorithms, and user-friendly integration, making it a competitive choice for professionals seeking a dependable, high-performance VFD.

Key Application Scenarios

This 55kW VFD is exceptionally well-suited for a wide array of high-power pump applications. In the water and wastewater treatment industry, it excels in managing large centrifugal pumps for raw water intake, distribution, and sewage effluent, optimizing flow rates and reducing energy consumption during peak and off-peak hours. For the oil and gas sector, the GD20-055G-4 is deployed in crude oil transfer, pipeline boosting, and chemical injection pumps, where precise flow control and high torque at low speeds are paramount. In general industrial manufacturing, it efficiently drives large circulating pumps in cooling systems, boiler feed pumps, and large-scale dewatering operations. Its ability to adapt to varying load demands and provide stable performance makes it a versatile asset for any application requiring robust and energy-efficient motor control for high-power pumps.

Practical System Integration Guidance

Integrating the INVT GD20-055G-4 into an existing pump control system is streamlined through its versatile connectivity and intuitive programming interface. For wiring, ensure the power input terminals (R, S, T) are connected to a stable 3-phase power supply within the specified voltage range (380-460V), and the motor output terminals (U, V, W) are securely connected to the pump motor. Utilize the designated control terminals for digital inputs (start/stop, speed selection) and analog inputs (speed reference) as per the system’s operational logic. The standard RS485 communication port facilitates integration with SCADA systems or PLCs for remote monitoring and control, supporting Modbus RTU protocol for efficient data exchange. Parameter programming for pump control often involves setting up V/f curves or sensorless vector control modes, adjusting acceleration/deceleration times, and configuring overload protection parameters to match the specific motor and pump characteristics. For instance, to set a maximum output frequency, navigate to parameter group P03 and adjust P03-01 to the desired value (e.g., 60.00 Hz for a standard 60Hz motor). Always consult the official INVT GD20 user manual for detailed wiring diagrams and parameter configuration.

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD20-055G-4 VFD hinges on adherence to operational guidelines and proactive risk mitigation. Before powering up, verify all electrical connections are secure and correctly phased to prevent damage. Implement appropriate motor protection settings within the VFD, such as overload (P05-01, P05-02) and overtemperature (P05-07) parameters, to safeguard the pump motor from electrical faults. For applications requiring dynamic braking, ensure the built-in braking resistor is adequately sized and properly connected to prevent overheating during frequent deceleration cycles. Common troubleshooting involves addressing fault codes displayed on the VFD's LED panel. For instance, fault code E.OC (Overcurrent) typically indicates a motor or load issue, requiring inspection of the motor winding, coupling, or pump impeller. Fault code E.Ot (Overtemperature) suggests inadequate ventilation or excessive ambient temperature, necessitating an check of the VFD's cooling fan and surrounding airflow. Always disconnect power before performing any maintenance or inspection.

Scalability & Long-Term Value

The INVT GD20-055G-4 offers significant scalability and long-term value, particularly for evolving industrial automation needs. Its compatibility with a range of optional communication modules, including PROFIBUS, DeviceNet, and Ethernet/IP, allows for seamless integration into diverse industrial networks and IIoT platforms. This adaptability ensures that as plant infrastructure or control strategies change, the VFD can remain a central component without requiring a complete system overhaul. The drive's robust build quality and independent heatsink design contribute to extended operational life, reducing the total cost of ownership through minimized downtime and maintenance requirements. Furthermore, INVT's commitment to firmware updates and technical support ensures that users can leverage the latest advancements in VFD technology, maintaining optimal performance and energy efficiency over the lifespan of their pumping systems.

FAQs

Q1: What is the power rating of the INVT GD20-055G-4 VFD?

The INVT GD20-055G-4 VFD has a substantial power rating of 55 kilowatts (kW).

This is equivalent to approximately 75 horsepower (HP), making it suitable for demanding high-power motor applications.

Its robust capacity ensures it can drive large industrial pumps and machinery effectively.

Q2: What type of pump applications is this VFD best suited for?

This VFD excels in high-power industrial pump control scenarios.

It is highly effective for water treatment, oil and gas transfer, and large-scale HVAC systems.

Applications requiring precise flow regulation and energy efficiency at high loads benefit significantly from its capabilities.

Q3: Can this VFD be integrated with existing industrial control systems?

Yes, the INVT GD20-055G-4 offers excellent system integration capabilities.

It features an integrated RS485 port supporting Modbus RTU for straightforward communication.

Optional communication modules for protocols like PROFIBUS and Ethernet/IP are also available for advanced connectivity.

Q4: What are the primary advantages of the INVT GD20-055G-4 over other VFDs?

A key advantage is its independent heatsink design for superior thermal management.

The VFD includes a built-in braking unit, enhancing deceleration control and safety.

Its robust overload capacity and advanced control algorithms ensure reliable performance under stress.

Q5: What input voltage range does the INVT GD20-055G-4 support?

This VFD operates on a 3-phase input voltage supply.

The supported range is between 380 and 460 Volts (V), accommodating common industrial power grids.

It is designed for 50Hz or 60Hz frequency operation, offering global compatibility.

Q6: Does the VFD come with overload protection features?

Yes, comprehensive overload protection is a standard feature.

It can handle 150% of rated current for up to 60 seconds and 180% for 10 seconds.

This ensures motor protection against transient load increases and operational faults.

Q7: How does the VFD manage heat dissipation?

The GD20-055G-4 utilizes an independent heatsink design.

This allows for more efficient cooling compared to integrated designs, prolonging component life.

Forced air cooling ensures optimal thermal performance even in demanding environments.

Q8: What control methods does the INVT GD20-055G-4 utilize?

It offers both V/f (Volts per Hertz) control and Sensorless Vector Control.

Sensorless Vector Control provides enhanced torque control and dynamic response for pump applications.

These methods ensure precise motor speed and torque regulation for optimal operation.

Q9: Are there any specific wiring considerations for installation?

Ensure all power input (R, S, T) and motor output (U, V, W) terminals are correctly connected.

Grounding connections must be robust to ensure safety and prevent interference.

Refer to the user manual for specific wiring diagrams for control signals and communication ports.

Q10: What are common fault codes and their basic meanings?

Fault E.OC typically indicates overcurrent, suggesting a motor or load issue.

Fault E.Ot points to over-temperature, which could be due to ventilation problems or high ambient heat.

Fault E.UV signifies undervoltage, requiring a check of the power supply stability.