INVT GD350A-630G-4 High Power AC Drive VFD

The INVT GD350A-630G-4 High Power AC Drive VFD represents a significant advancement in industrial motor control technology, offering unparalleled performance and flexibility for demanding applications. This sophisticated Variable Frequency Drive (VFD) is engineered with a dedicated processor for motor control, delivering enhanced scalability and user-friendliness through features like Sensorless Vector Control (SVC), Closed-Loop Vector Control (VC), and Safe Torque Off (STO). Its integrated G/P models adeptly handle diverse operational requirements, while its support for mobile app operation and secondary development capabilities position it at the forefront of Industry 4.0 integration. The GD350A series excels in driving a wide array of motor types, including permanent magnet synchronous motors (PMSM), asynchronous motors, and synchronous reluctance motors, with impressive precision and efficiency. Key technical parameters include a robust input voltage range of 380-440V AC (3-phase), supporting 50/60Hz frequencies, and output voltage of 0-480V AC. It offers dual-rating capabilities, allowing for 150% overload for 60 seconds in Heavy Duty (G) settings and 120% for 60 seconds in Normal Duty (P) settings. The output frequency range extends from 0 to 590 Hz.

Product Specifications

| Parameter             | Specification                                                                    |

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

| Model                 | GD350A-630G-4                                                                    |

| Input Voltage         | 3-Phase, 380V - 440V AC                                                          |

| Input Frequency       | 50/60 Hz (± 5%)                                                                  |

| Output Voltage        | 0 - 480V AC (max. input voltage)                                                 |

| Output Frequency      | 0 - 590 Hz                                                                       |

| Rated Power (Heavy Duty) | 630 kW                                                                           |

| Rated Current (Heavy Duty) | Refer to specific model datasheet, generally high capacity for 630kW rating    |

| Control Modes         | V/F, Sensorless Vector Control (SVC), Closed-Loop Vector Control (VC)            |

| Motor Compatibility   | Asynchronous Motors, Permanent Magnet Synchronous Motors (PMSM), Synchronous Reluctance Motors |

| Overload Capacity     | 150% for 60s (Heavy Duty - G setting)                                            |

| Protection Features   | Overcurrent, Overvoltage, Undervoltage, Overheating, Overload, Phase Loss, etc. |

| Safety Features       | Safe Torque Off (STO) compliant with SIL2                                        |

| Communication         | Standard Modbus RTU (RS-485), Optional CANopen, Profibus-DP, Profinet, EtherCAT, Ethernet/IP |

| Expansion Slots       | Up to 3 expansion cards                                                          |

| Operating Temperature | -10°C to +40°C (standard), derating required above +40°C                         |

Core Features & Market Positioning

The INVT GD350A-630G-4 distinguishes itself in the high-power AC drive market through its advanced processor technology and versatile control algorithms, including SVC and VC, which ensure exceptional precision in speed, torque, and position control for both synchronous and asynchronous motors. Its market positioning is further solidified by its robust expandability, featuring three slots for optional cards (PG, PLC, communication, I/O) that allow for extensive customization and integration into complex automation systems. The drive's ability to support secondary development via an optional programmable expansion card with up to 128kB memory offers unique advantages for OEMs seeking to tailor solutions and reduce system costs. Furthermore, the integrated Safe Torque Off (STO) function, compliant with SIL2 standards, enhances operational safety and meets stringent industrial safety regulations. The GD350A's G/P model integration simplifies inventory management and enhances competitiveness, particularly in light-load applications where it can control motors of a higher power rating than typical VFDs.

Key Application Scenarios

The INVT GD350A-630G-4 is ideally suited for a wide spectrum of demanding industrial applications. Its high power output and precise control capabilities make it exceptionally suitable for heavy-duty applications such as large conveyors, hoists, and complex machinery in the construction, mining, and material handling sectors. Industries like textiles, fibers, packaging, printing, and machine tool manufacturing benefit from its ability to manage intricate processes requiring high torque at low speeds and precise speed regulation. The drive's advanced vector control performance, with a closed-loop vector dynamic speed drop of less than 0.25% and torque response under 5ms, makes it invaluable for applications requiring exact motion control. Additionally, its support for firefighting pump control functions (fire mode) underscores its critical role in safety systems within the building automation and environmental engineering sectors, particularly in water and wastewater management.

Practical System Integration Guidance

Integrating the INVT GD350A-630G-4 into existing industrial systems is facilitated by its flexible communication options and modular design. It comes standard with Modbus RTU over RS-485, with optional expansion cards supporting protocols like Profibus-DP, Profinet, CANopen, and EtherCAT, enabling seamless integration into diverse automation networks. For enhanced connectivity, optional Bluetooth or Wi-Fi modules allow for remote configuration and monitoring via the INVT Workshop app, extending control capabilities up to 30 meters. The drive's "one-key" motor parameter auto-tuning and self-adaptation capabilities significantly reduce commissioning time, enabling near-commissioning-free startup for both asynchronous and synchronous motors. Proper installation practices, including adequate ventilation and adherence to wiring guidelines outlined in the product manual, are crucial for ensuring optimal performance and longevity. The unit's EMC C3 compliance with an integrated filter is suitable for industrial environments with up to 30m shielded motor cables, with further protection achievable using additional EMC filters for C2 category environments.

Operation and Risk Mitigation

Operating the INVT GD350A-630G-4 involves leveraging its intuitive multi-function LCD keypad or remote monitoring via mobile applications for parameter setup and diagnostics. Risk mitigation is paramount, and the drive incorporates over 30 fault protection functions, including overcurrent, overvoltage, undervoltage, over-temperature, and phase loss, to safeguard both the drive and the connected motor. The integrated Safe Torque Off (STO) function is a critical safety feature, ensuring that the motor is safely brought to a torque-free state, thereby minimizing risks during maintenance or emergency situations. Users should consult the product manual for specific error codes and troubleshooting steps. Common issues may relate to parameter misconfiguration, external wiring faults, or environmental factors; addressing these promptly through proper diagnostics and maintenance is essential for continuous operation.

Scalability & Long-Term Value

The INVT GD350A-630G-4 is designed for scalability and long-term value, offering extensive expandability through its three dedicated expansion card slots. This allows users to integrate various optional cards for enhanced I/O, specialized feedback (PG cards for different encoder types), and advanced communication protocols as automation requirements evolve. Its compatibility with a wide range of motor types and control algorithms ensures its relevance across various applications and technological shifts. The capability for remote firmware upgrades via RS485, local serial port, or 4G expansion card, as well as local upgrades via USB flash drive, ensures that the drive can be kept up-to-date with the latest features and performance enhancements. Furthermore, its integration with Industry 4.0 concepts, including IoT functionality and mobile app connectivity, positions the GD350A as a future-proof investment for smart manufacturing environments.

Frequently Asked Questions (FAQs)

Q1: What motor types can the INVT GD350A-630G-4 control?

The INVT GD350A-630G-4 is highly versatile, capable of controlling asynchronous motors, permanent magnet synchronous motors (PMSM), and synchronous reluctance motors. This broad compatibility allows it to serve a wide range of applications and motor technologies within industrial settings.

It supports advanced control algorithms such as Sensorless Vector Control (SVC) and Closed-Loop Vector Control (VC), ensuring precise performance regardless of motor type. This flexibility makes it a universal solution for many motor-driven systems.

The drive's ability to adapt to different motor characteristics through auto-tuning functions further enhances its suitability for diverse applications, simplifying integration and optimizing performance.

Q2: What are the key safety features of the INVT GD350A-630G-4?

A primary safety feature is the integrated Safe Torque Off (STO) function, which complies with SIL2 standards. This function ensures that the motor is safely disconnected from power, preventing unexpected starts during maintenance or emergencies.

The drive also offers comprehensive protection against electrical faults, including overcurrent, overvoltage, undervoltage, phase loss, and overheating. These built-in protections safeguard the equipment and personnel.

Additionally, the drive's robust construction and adherence to international safety standards contribute to overall system reliability and operational safety in demanding industrial environments.

Q3: How does the GD350A-630G-4 support Industry 4.0 integration?

The GD350A-630A-630G-4 supports Industry 4.0 through its IoT capabilities and connectivity options. It can be monitored and controlled remotely via optional Bluetooth or Wi-Fi modules using the INVT Workshop app or PC software.

It offers flexible communication protocols like Modbus TCP, Ethernet/IP, Profinet, and EtherCAT, enabling seamless integration with supervisory control and data acquisition (SCADA) systems and other intelligent devices on the plant floor. The drive also supports secondary development through optional PLC cards, allowing for custom logic and advanced automation tasks that are fundamental to smart manufacturing.

Q4: Can the GD350A-630G-4 handle both constant and variable torque loads?

Yes, the GD350A-630G-4 is designed to handle both constant torque (G model) and variable torque (P model) loads effectively. This dual capability makes it highly adaptable to applications such as pumps and fans (variable torque) as well as conveyors and heavy machinery (constant torque).

The drive allows for a motor power rating higher than the VFD's rating in variable torque applications like pumps and fans, leading to potential cost savings without compromising system stability or efficiency.

Its advanced control modes, including SVC and VC, ensure optimized performance and energy efficiency across the entire operating range for both load types.

Q5: What are the expansion capabilities of the INVT GD350A-630G-4?

The GD350A-630G-4 features three expansion slots, allowing for the simultaneous installation of multiple optional cards. These expansion cards can include I/O cards for extended digital and analog connectivity, PG cards for encoder feedback in closed-loop systems, and various communication cards.

Communication card options are extensive, supporting protocols like Modbus, Profibus-DP, Profinet, CANopen, Ethernet, and EtherCAT, ensuring compatibility with virtually any industrial network. This modular approach allows users to customize the drive to meet specific application needs, from simple to highly complex control scenarios.

The programmable expansion card, with up to 128kB of memory, enables secondary development, allowing users to implement custom logic and replace PLCs in simpler systems, further enhancing flexibility and reducing costs.

Q6: How is the GD350A-630G-4 commissioned and programmed?

Commissioning is simplified by the "one-key" motor parameter auto-tuning and loop parameter self-adaptation features, enabling commissioning-free startup. The multi-function LCD keypad provides an intuitive interface for parameter setup and monitoring, often with a wizard mode for initial configuration.

Programming can be done directly via the keypad, through PC software like INVT Workshop using a USB connection, or remotely via optional Bluetooth/Wi-Fi modules. For advanced customization, an optional programmable expansion card supports instruction language, ladder diagram, and sequential function chart programming, with up to 16K steps of program storage.

Firmware can be updated locally via USB flash drive or remotely via RS485, local serial port, or a 4G expansion card, ensuring the drive remains current.

Q7: What are the typical applications for high-power AC drives like the GD350A-630G-4?

High-power AC drives like the GD350A-630G-4 are crucial in applications requiring precise speed and torque control for heavy machinery. This includes large industrial fans, pumps, compressors, extruders, crushers, and heavy-duty conveyors in sectors such as manufacturing, mining, and utilities.

They are also employed in continuous process industries like paper manufacturing, textiles, and metal processing, where stable and efficient motor operation is critical for production quality and throughput. The drive's ability to handle high power ratings and offer advanced control makes it suitable for demanding tasks in renewable energy systems and large-scale HVAC applications.

The drive's precision control also extends to applications requiring intricate motion, such as advanced packaging machinery, printing presses, and CNC machines.

Q8: What is the input voltage range and compatibility of the GD350A-630G-4?

The INVT GD350A-630G-4 is designed for industrial power systems, operating with a 3-phase input voltage range of 380V to 440V AC. This range is standard for many industrial power grids, particularly in regions utilizing a 400V supply.

It is compatible with both 50Hz and 60Hz frequency grids, offering flexibility for international installations. The drive also features an automatic voltage regulation function to maintain a stable output voltage even when the grid voltage fluctuates.

This robust input voltage compatibility ensures reliable operation across various industrial power environments.

Q9: How does the GD350A-630G-4 manage motor protection and overload conditions?

The GD350A-630G-4 incorporates an extensive suite of over 30 fault protection functions to safeguard the motor and the drive itself. These include protections against overcurrent, overvoltage, undervoltage, phase loss, and over-temperature conditions.

For overload handling, it offers dual-rating capabilities: in Heavy Duty (G) mode, it can sustain 150% of its rated current for 60 seconds, and in Normal Duty (P) mode, 120% for 60 seconds. This allows it to handle temporary peak loads without tripping, ensuring continuous operation for demanding applications.

The drive also supports motor temperature detection through interfaces for sensors like PT100, PT1000, KTY84, and PTC, providing an extra layer of motor protection.

Q10: What communication protocols are supported by the GD350A-630G-4?

The INVT GD350A-630G-4 comes standard with Modbus RTU communication over RS-485. This widely adopted protocol facilitates basic communication and data exchange with PLCs and HMI systems.

For more advanced industrial automation networks, a variety of optional communication expansion cards are available. These support protocols such as Profibus-DP, Profinet, CANopen, EtherCAT, and Ethernet/IP, enabling seamless integration into complex control architectures.

Additionally, optional GPRS (MQTT) and Wi-Fi modules allow for wireless communication, facilitating remote monitoring and control, which is increasingly important for IoT and Industry 4.0 applications.