INVT GD350A-004G/5R5P-4 High Performance General Purpose VFD

The INVT GD350A-004G/5R5P-4 is a high-performance, general-purpose Variable Frequency Drive (VFD) engineered for demanding industrial applications. This unit offers robust control, exceptional energy efficiency, and advanced features designed to optimize motor performance and reduce operational costs. Key advantages include its precise control algorithms, wide voltage range, and comprehensive protection features. Core technical parameters of the INVT GD350A-004G/5R5P-4 include a rated power of 5.5 kW (7.5 HP), a 3-phase input/output voltage of 380-440V, and an output current of 12.0A. It also boasts an IP20 enclosure rating and supports both V/f and Vector Control modes, ensuring versatility across diverse machinery.

Product Specifications

| Parameter             | Value                 |

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

| Model                 | GD350A-004G/5R5P-4    |

| Rated Power           | 5.5 kW / 7.5 HP       |

| Input Voltage (3-Phase) | 380V - 440V           |

| Output Voltage (3-Phase)| 380V - 440V           |

| Rated Output Current  | 12.0 A                |

| Frequency Range       | 0-300 Hz              |

| Enclosure Rating      | IP20                  |

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

| Braking Unit          | Built-in (optional external resistor) |

| Communication Options | RS485 (Modbus RTU)    |

| Mounting              | Wall/Din Rail         |

Core Features & Market Positioning

The INVT GD350A series, including the GD350A-004G/5R5P-4, distinguishes itself through its advanced digital signal processing and sophisticated control algorithms. This drive excels in providing precise speed and torque control, making it a superior choice for applications requiring dynamic response and accurate positioning. Its market positioning is firmly rooted in delivering high-value solutions for general-purpose industrial automation where reliability, energy savings, and ease of integration are paramount. The incorporation of intelligent thermal management systems and robust overload capabilities further enhances its appeal in competitive industrial environments, ensuring sustained performance even under challenging conditions.

Key Application Scenarios

The versatility of the INVT GD350A-004G/5R5P-4 makes it suitable for a broad spectrum of industrial applications. Common uses include powering pumps and fans where precise flow and pressure control are essential, thereby optimizing energy consumption. It is also widely deployed in conveyor systems for material handling, packaging machinery, and machine tools, where accurate speed regulation and smooth acceleration/deceleration are critical for process efficiency and product quality. Textile machinery, printing equipment, and HVAC systems also benefit significantly from the drive's robust performance and energy-saving capabilities.

Practical System Integration Guidance

Integrating the INVT GD350A-004G/5R5P-4 into existing systems is streamlined by its user-friendly interface and comprehensive connectivity options. For installation, ensure proper ventilation around the VFD to prevent overheating; a minimum clearance of 50mm on all sides is recommended. Wiring should adhere strictly to the schematics provided in the manual, utilizing appropriately sized conductors for power and control circuits. Grounding is crucial for safety and performance, connecting the drive's ground terminal to the system's main ground. Parameter programming can be accomplished via the integrated keypad or through the RS485 communication port using Modbus RTU protocol, allowing for remote configuration and monitoring.

Operation and Risk Mitigation

Safe operation of the INVT GD350A-004G/5R5P-4 necessitates adherence to safety guidelines and understanding potential fault conditions. Before powering up, verify all connections and ensure the motor is correctly specified for the drive's output. Implement appropriate emergency stop procedures. Common fault codes, such as Overcurrent (OC), Overvoltage (OV), and Overtemperature (OT), indicate potential issues that require immediate attention. The drive's built-in protection mechanisms, while robust, should be supplemented by proper system design and maintenance to mitigate risks and ensure continuous operation. Regular inspection of wiring and environmental conditions is advisable.

Scalability & Long-Term Value

The INVT GD350A-004G/5R5P-4 offers significant long-term value through its compatibility with evolving industrial automation trends and its inherent design for longevity. Its support for standard communication protocols like Modbus RTU facilitates integration into broader Supervisory Control and Data Acquisition (SCADA) systems and Industrial Internet of Things (IIoT) platforms, enabling advanced data analytics and predictive maintenance. The drive's modular design and robust build quality contribute to its extended operational lifespan, reducing the total cost of ownership. Furthermore, INVT's commitment to firmware updates ensures that the drive remains aligned with technological advancements, offering a scalable solution for future operational needs.

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Frequently Asked Questions

What is the typical power rating for the INVT GD350A-004G/5R5P-4?

The INVT GD350A-004G/5R5P-4 is rated for a nominal power output of 5.5 kilowatts. This corresponds to approximately 7.5 horsepower, making it suitable for medium-duty industrial motor applications.

This power range allows it to efficiently drive a variety of machinery without being oversizes or undersized for many common tasks. Its robust design ensures it can handle motor starting surges and sustained operation within its specified limits.

Users can confidently select this VFD for applications requiring precise motor speed and torque control, benefiting from its performance characteristics for optimized process outcomes.

How does the INVT GD350A-004G/5R5P-4 handle motor control?

This VFD offers both V/f (Volts per Hertz) control and advanced Sensorless Vector Control modes. V/f control is standard for general-purpose applications requiring simple speed regulation.

Sensorless Vector Control provides superior torque responsiveness and accuracy, especially at lower speeds, without requiring motor feedback encoders. This enhanced control is crucial for applications demanding precise torque management.

The ability to select between these control methods allows users to tailor the drive's performance to the specific requirements of the connected motor and application, maximizing efficiency and control precision.

What are the main advantages of using Sensorless Vector Control with this VFD?

Sensorless Vector Control offers significantly improved transient torque response compared to basic V/f control. This means the motor can react quickly to changes in load or speed commands.

It also provides better low-speed torque performance, enabling the drive to maintain rated torque even at very low motor speeds, which is critical for applications like hoists or presses.

By eliminating the need for an encoder, Sensorless Vector Control simplifies installation and reduces system complexity and cost, while still delivering high-performance motor control.

Can the INVT GD350A-004G/5R5P-4 be integrated into an industrial network?

Yes, the INVT GD350A-004G/5R5P-4 is equipped with an RS485 communication port. This port supports the widely adopted Modbus RTU protocol, enabling seamless integration into supervisory control and data acquisition (SCADA) systems.

Network integration allows for remote monitoring of drive status, parameters, and diagnostics. It also facilitates remote control of motor speed, start/stop commands, and parameter adjustments from a central control system.

This capability is essential for modern automated facilities aiming for centralized control, data logging, and enhanced operational efficiency through IIoT (Industrial Internet of Things) platforms.

What are the typical applications for this VFD model?

This general-purpose VFD is highly versatile and commonly applied to pumps, fans, and blowers for flow and pressure regulation. It's also extensively used in material handling equipment like conveyors and elevators for controlled movement.

Machine tools, packaging machinery, and textile equipment benefit from its precise speed and torque control capabilities, ensuring consistent product quality and process efficiency.

Other applications include HVAC systems, printing machines, and any scenario where variable speed operation can lead to energy savings or improved process control over fixed-speed machinery.

What is the enclosure rating of the INVT GD350A-004G/5R5P-4?

The INVT GD350A-004G/5R5P-4 features an IP20 enclosure rating. This designation indicates that the drive is protected against solid objects greater than 12.5mm in diameter, such as a finger.

However, an IP20 rating means it offers no specific protection against water ingress. Therefore, it is designed for installation in clean, dry indoor environments, away from moisture or corrosive substances.

Proper installation within a control cabinet or enclosure is recommended to provide additional protection against dust and environmental contaminants, ensuring optimal performance and longevity.

Does this VFD have built-in braking capabilities?

The INVT GD350A-004G/5R5P-4 includes a built-in braking unit. This allows for dynamic braking of the motor by dissipating excess energy generated during deceleration into a braking resistor.

While it has the internal circuitry for braking, an external braking resistor is typically required for applications involving frequent braking or heavy loads that require rapid deceleration. The selection of the resistor's ohmic value and power rating is critical.

This braking capability is essential for applications where the motor needs to be stopped quickly or held in place under load, preventing coasting and ensuring safety and process control.

What is the input and output voltage range for this drive?

The INVT GD350A-004G/5R5P-4 is designed for a 3-phase input voltage range of 380 to 440 Volts AC. It also outputs a 3-phase voltage within the same range, typically matching the input voltage under normal operation.

This voltage range is standard for many industrial power grids in various regions, making the drive broadly compatible with typical factory power supplies. Always ensure your supply voltage is within these specified limits before connecting.

The consistent voltage output ensures stable motor operation and performance, crucial for maintaining process integrity in demanding industrial environments.

How is the INVT GD350A-004G/5R5P-4 programmed or configured?

Configuration of the INVT GD350A-004G/5R5P-4 can be performed directly using the integrated keypad and LED display on the front of the unit. This allows for on-site parameter adjustments and monitoring.

For more advanced control or remote configuration, the drive supports programming via its RS485 serial communication port using the Modbus RTU protocol. This enables integration with human-machine interfaces (HMIs) or industrial PCs.

Software tools are also often available from INVT to facilitate parameter setup, backup, and diagnostics, offering flexibility for both initial commissioning and ongoing system management.

What safety considerations should be taken when installing this VFD?

Proper grounding of the VFD and connected motor is paramount for electrical safety and to prevent electrical noise interference. Ensure all power and control wiring is correctly sized and terminated according to the manual's specifications.

Before applying power, verify that the motor's nameplate data matches the VFD's capabilities and that the environmental conditions (temperature, humidity, dust) are suitable for an IP20 rated device. Install in a location that allows for adequate ventilation.

Always follow local electrical codes and standards. Implement emergency stop functionalities and ensure personnel are trained on safe operation and troubleshooting procedures for the drive and the machinery it controls.