INVT GD20-0R4G-S2 Single-Phase VFD Drive

The INVT GD20-0R4G-S2 single-phase VFD drive offers robust performance and advanced control for a wide range of industrial applications. This compact and efficient variable frequency drive is designed for seamless integration into single-phase power systems, delivering precise motor speed control and significant energy savings. Key advantages include its high starting torque, versatile control modes, and comprehensive protection features, making it an ideal choice for demanding operational environments. The GD20-0R4G-S2 boasts an output power of 0.4kW (0.5HP) and operates from a single-phase 200-240V input, providing a reliable solution for applications requiring precise speed regulation and improved operational efficiency.

| Feature               | Specification                                    |

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

| Model                 | GD20-0R4G-S2                                     |

| Input Power           | Single-Phase 200-240V AC                         |

| Output Power          | 0.4kW (0.5HP)                                    |

| Output Frequency Range| 0.00-400.00 Hz                                   |

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

| Starting Torque       | 150% at 0.5Hz (Sensorless Vector Control)        |

| Overload Capacity     | 150% rated current for 60 seconds                |

| Communication Options | RS485 (Optional)                                 |

| Protection Functions  | Over-voltage, Under-voltage, Over-current, etc.  |

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

| Dimensions (W x H x D)| 74 x 135 x 105 mm                                |

Core Features & Market Positioning

The INVT GD20-0R4G-S2 distinguishes itself in the market through its advanced sensorless vector control technology, which provides superior speed accuracy and torque response even under fluctuating load conditions. This capability is crucial for applications demanding precise motion control, such as conveyor systems, packaging machinery, and textile equipment. Unlike basic V/f control drives, the GD20-0R4G-S2 minimizes reliance on motor feedback, simplifying installation and reducing system costs while maintaining high performance. Its robust design and compact footprint further enhance its appeal, enabling easy integration into existing control panels and confined spaces. INVT's commitment to innovation is evident in the drive's energy-saving features, optimized for reduced power consumption, contributing to operational cost savings and environmental sustainability.

Key Application Scenarios

This single-phase VFD is exceptionally well-suited for a diverse array of industrial applications where precise speed control and energy efficiency are paramount. It is a primary choice for driving pumps and fans in HVAC systems, ensuring optimal airflow and water pressure while minimizing energy usage. The GD20-0R4G-S2 is also widely deployed in material handling systems, including conveyors and automated production lines, where consistent speed regulation is essential for product throughput and quality. Furthermore, its robust torque characteristics make it suitable for machine tools, mixers, and packaging equipment, providing the necessary power to handle varying loads effectively. The drive’s adaptability allows it to support single-phase motors in applications ranging from small manufacturing facilities to specialized industrial processes.

Practical System Integration Guidance

Integrating the INVT GD20-0R4G-S2 into an industrial system involves careful consideration of wiring and parameter configuration. For standard installation, connect the single-phase 200-240V AC power supply to the L and N terminals. The motor windings are connected to U, V, and W. Ensure all connections are secure and adhere to local electrical codes. For advanced control, the drive supports digital inputs for start/stop commands, forward/reverse rotation, and multi-speed selection. Analog inputs can be utilized for speed referencing via a potentiometer or external voltage signal. Programming the GD20-0R4G-S2 is typically done through its onboard keypad or via optional communication interfaces like RS485 using INVT's configuration software. Key parameters to configure include the motor's rated voltage, frequency, current, and speed, along with control mode selection (sensorless vector or V/f).

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD20-0R4G-S2 necessitates adherence to operational guidelines and understanding potential fault conditions. Always ensure the drive is properly grounded and that the input power is within the specified voltage range to prevent damage. During commissioning, verify motor parameters are correctly set to avoid overheating or performance issues. Common troubleshooting involves checking for error codes displayed on the drive's interface; for instance, an "OL" (Overload) fault typically indicates excessive current draw, possibly due to an undersized motor or a mechanical obstruction. An "OC" (Overcurrent) fault might suggest a rapid acceleration setting or a short circuit. Refer to the user manual for a complete list of fault codes and their corrective actions. Proper ventilation around the drive is crucial to maintain optimal operating temperatures and prevent premature failure.

Scalability & Long-Term Value

The INVT GD20-0R4G-S2 offers a degree of scalability and long-term value through its compatibility and integration capabilities. While this specific model is designed for single-phase motor applications, INVT's broader GD20 series includes three-phase output variants, allowing for system expansion or upgrades to accommodate larger or three-phase motor requirements within the same product family architecture. The optional RS485 communication port enables seamless integration into supervisory control and data acquisition (SCADA) systems or programmable logic controller (PLC) networks, facilitating remote monitoring, control, and data logging. This connectivity is foundational for implementing Industrial Internet of Things (IIoT) strategies, enabling predictive maintenance, performance optimization, and enhanced operational visibility in modern manufacturing environments.

FAQs

What is the maximum motor size for the INVT GD20-0R4G-S2?

The GD20-0R4G-S2 is rated for 0.4kW (0.5HP) motors. This specification defines the upper limit of motor power it can effectively drive.

Exceeding this power rating can lead to drive overload, reduced performance, and potential damage to the VFD. Always match the VFD to the motor's nameplate data.

How do I connect a potentiometer for speed control with the GD20-0R4G-S2?

Connect a 1k-10k ohm potentiometer to the analog input terminals. Typically, connect one end to +10V, the other end to AI1 (analog input 1), and the wiper to GND (common).

Configure parameters P03.00 to 1 (or relevant setting for analog voltage input) and P03.01 to the specific analog input used (e.g., AI1). Adjust P03.02 and P03.03 for the desired speed range.

What are the main advantages of sensorless vector control in the GD20-0R4G-S2?

Sensorless vector control provides excellent torque response and speed accuracy. It achieves this without requiring a motor encoder.

This method offers improved performance, especially at low speeds and under varying load conditions. It also simplifies wiring and reduces system complexity.

Can the GD20-0R4G-S2 be used with three-phase motors?

No, the GD20-0R4G-S2 is designed exclusively for single-phase motors. It accepts single-phase input power.

The output terminals U, V, W are intended for connection to a single-phase motor's windings. Using it with a three-phase motor will result in improper operation and potential damage.

What is the meaning of the "OL" fault code on the INVT GD20-0R4G-S2?

The "OL" fault code signifies an overload condition. This means the motor is drawing more current than the VFD is designed to handle for an extended period.

Possible causes include an undersized motor, excessive load on the driven equipment, or incorrect motor parameters set in the VFD. Check mechanical load and VFD settings.

How can I set up multi-speed operation for the GD20-0R4G-S2?

Configure digital inputs (DI) for speed selection. Assign specific speeds to different DI combinations.

For example, DI1 for Speed 1, DI2 for Speed 2, DI1+DI2 for Speed 3. Set the desired speeds in parameters P06.01 to P06.04. Ensure the control mode is set to digital input control.

What is the protection class (IP rating) of the INVT GD20-0R4G-S2?

The GD20-0R4G-S2 typically has an IP20 enclosure rating. This means it is protected against solid objects larger than 12.5mm.

It does not offer protection against water ingress. Ensure the drive is installed in a clean, dry environment or within a suitable enclosure.

Does the GD20-0R4G-S2 support communication protocols like Modbus?

Yes, the GD20-0R4G-S2 supports RS485 communication, which is commonly used with the Modbus RTU protocol. An optional communication card may be required.

This allows for integration into SCADA systems or PLCs for remote monitoring and control. Parameter settings are needed to configure the communication address and protocol.

What is the acceptable ambient operating temperature range for this VFD?

The INVT GD20-0R4G-S2 is designed to operate within an ambient temperature range of -10°C to +40°C.

Operating outside this range can affect performance and shorten the lifespan of the drive components. Ensure adequate ventilation to keep the temperature within limits.

How do I reset the drive to factory default settings on the GD20-0R4G-S2?

To reset to factory defaults, access the parameter settings menu. Locate the factory reset parameter, often labeled "F-Reset" or similar.

Select the option to restore factory defaults and confirm the action. Be aware that all custom parameters will be erased.