INVT GD20-7R5G-4 Universal Inverter VFD Drive
The INVT GD20-7R5G-4 Universal Inverter VFD Drive stands out as a robust and versatile solution for demanding industrial applications. This variable frequency drive (VFD) offers exceptional control over AC induction motors, boasting a power output of 7.5 kW (10 HP) and operating on a 3-phase, 400V power supply. Its core advantages lie in its precise motor speed regulation, energy efficiency capabilities, and a comprehensive suite of protection features designed to enhance operational longevity and safety. The GD20-7R5G-4 is engineered for reliability, featuring advanced control algorithms for smooth acceleration, deceleration, and torque control. Its compact design facilitates easy integration into existing control panels and machinery.
Product Specifications
| Parameter | Specification |
| :-------------------- | :------------------------------------------ |
| Model | GD20-7R5G-4 |
| Rated Power | 7.5 kW (10 HP) |
| Input Voltage | 3-Phase, 380V-440V AC |
| Output Frequency | 0-400 Hz |
| Control Method | V/f Control, Vector Control |
| Overload Capacity | 150% for 60s, 180% for 10s |
| Protection Features | Overcurrent, Overvoltage, Undervoltage, Overload, Overheat, Short Circuit |
| Communication Ports | RS485 (Optional) |
| Dimensions (W x H x D)| 220 x 330 x 170 mm |
| Ambient Temperature | -10°C to +40°C |
Core Features & Market Positioning
The INVT GD20-7R5G-4 distinguishes itself in the competitive VFD market through its advanced sensorless vector control, which delivers superior torque performance and dynamic response, even at low speeds. This capability is crucial for applications requiring precise motion control and significant starting torque, such as conveyors, extruders, and machine tools. The drive's integrated braking unit capability further enhances its utility by providing rapid and controlled deceleration when required. INVT's commitment to robust firmware and high-quality components positions the GD20 series as a reliable and cost-effective choice for industries prioritizing uptime and operational efficiency. The user-friendly interface and comprehensive parameter settings allow for tailored performance optimization across a wide array of motor types and load conditions.
Key Application Scenarios
This universal inverter finds its application across a broad spectrum of industrial sectors. It is exceptionally well-suited for motor control in pumps and fans, where variable speed operation leads to significant energy savings by matching motor output to system demand. In material handling systems, such as conveyors and elevators, the GD20-7R5G-4 ensures smooth starting and stopping, preventing product damage and improving throughput. Machine tool manufacturers benefit from its precise speed and torque control for operations like milling, turning, and grinding. Furthermore, its robust design and protection features make it ideal for demanding environments in the plastics industry (e.g., injection molding machines, extruders) and the textile industry (e.g., spinning machines, looms).
Practical System Integration Guidance
Integrating the INVT GD20-7R5G-4 into an industrial system is streamlined due to its standard mounting dimensions and clear terminal layouts. Proper wiring is paramount for safe and efficient operation. Ensure the input power supply is correctly connected to the L1, L2, and L3 terminals, and the motor is connected to U, V, and W. For applications requiring dynamic braking, connect the braking resistor to the appropriate terminals. Commissioning involves setting essential parameters such as motor nominal current, maximum frequency, and acceleration/deceleration times through the drive's keypad or via communication interface. Referencing the user manual for specific parameter group configurations, such as motor data autotuning (P00.01 to P00.07), is highly recommended to achieve optimal motor performance and protection.
Operation and Risk Mitigation
Safe operation of the INVT GD20-7R5G-4 mandates adherence to electrical safety standards and proper installation practices. Always ensure the drive is powered down and de-energized before performing any wiring or maintenance. The drive incorporates extensive protection functions to mitigate common operational risks. Critical fault codes, such as "OC" (Overcurrent), "OV" (Overvoltage), "UV" (Undervoltage), and "OH" (Overheat), provide immediate diagnostic information. To prevent these, ensure the motor is correctly sized for the load, verify input voltage stability, and maintain adequate ventilation around the drive. Implementing a soft-start function (parameter group P02) helps reduce inrush current and mechanical stress during motor startup.
Scalability & Long-Term Value
The INVT GD20-7R5G-4 offers considerable scalability and long-term value through its flexible architecture and compatibility. It can be seamlessly integrated into existing SCADA or PLC-based control systems using its optional RS485 communication interface, supporting protocols like Modbus RTU, enabling remote monitoring and control. This facilitates its inclusion in Industry 4.0 initiatives and the broader Industrial Internet of Things (IIoT) ecosystem. The drive's modular design and extensive parameterization capabilities allow for easy adaptation to evolving process requirements or future upgrades, ensuring a sustained return on investment. Its robust construction and comprehensive protection mechanisms contribute to a prolonged service life, minimizing unscheduled downtime and maintenance costs.
Frequently Asked Questions (FAQs)
What is the maximum motor size for the INVT GD20-7R5G-4?
The GD20-7R5G-4 is rated for 7.5 kW, which typically corresponds to a 10 HP motor. This rating is suitable for a wide range of industrial motors within this power class. Always ensure the motor's full load current does not exceed the drive's output current capacity.
It is crucial to match the drive's power rating precisely to the motor's requirements to avoid damage and ensure optimal performance. Consult the motor's nameplate and the VFD's manual for precise compatibility checks.
Consider the motor's starting torque requirements and the application's duty cycle when confirming motor size suitability. Over-specifying or under-specifying can lead to inefficiencies or premature failure.
How do I connect a braking resistor to the INVT GD20-7R5G-4?
Connect the braking resistor to the dedicated braking terminals (usually marked PB+ and PB-) on the drive. Ensure the resistor's ohmic value and wattage rating are compatible with the GD20-7R5G-4 model and the application's regenerative braking needs.
Proper installation prevents overheating of the resistor and the drive. Incorrect connections can lead to fault conditions or damage. Always refer to the VFD's installation manual for specific terminal identification and wiring diagrams.
The need for a braking resistor depends on the application's deceleration profile and potential for regenerative energy feedback. Applications with frequent or rapid stops will likely require one to dissipate excess energy.
What are common troubleshooting steps for the INVT GD20-7R5G-4?
Begin by checking the drive's display for any fault codes and consulting the user manual to identify the error. Verify all power and motor connections are secure and correct. Ensure adequate ventilation and check ambient temperature limits.
Inspect the motor for any mechanical issues or excessive load. Review the drive's parameter settings, particularly those related to motor data and protection limits, to ensure they are correctly configured for the application.
If the issue persists, perform a factory reset (if appropriate for the situation) or contact INVT technical support for further assistance. Documenting the fault code and operational context is vital for effective troubleshooting.
