INVT GD350A-355G/400P-4 High Performance General VFD Drive

The INVT GD350A-355G/400P-4 High Performance General VFD Drive represents a significant advancement in variable frequency drive technology, engineered for demanding industrial applications. This drive distinguishes itself with exceptional control accuracy, robust construction, and advanced features designed to optimize motor performance and energy efficiency. Key advantages include its sophisticated vector control algorithms, comprehensive protection mechanisms, and user-friendly interface. Technically, the GD350A-355G/400P-4 boasts a power rating of 355kW (355G) or 400HP (400P), operates on a 400V power supply, and offers a wide frequency output range. Its integrated braking unit and advanced cooling system ensure reliable operation even under strenuous conditions.

Product Specifications

| Parameter               | Specification                                         |

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

| Model                   | GD350A-355G/400P-4                                    |

| Rated Power             | 355 kW / 355G (Metric Horsepower) or 400 HP / 400P (US Horsepower) |

| Input Voltage           | 3-Phase, 400V AC                                      |

| Output Frequency Range  | 0.00 Hz to 5000.00 Hz                                   |

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

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

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

| Communication Interfaces| RS485 (Modbus RTU standard), Optional fieldbus modules |

| Operating Temperature   | -10°C to 40°C (derating above 40°C)                   |

| Dimensions (H x W x D)  | Varies by enclosure size (refer to manual)            |

| Mounting                | Wall or Cabinet Mount                                 |

Core Features & Market Positioning

The INVT GD350A-355G/400P-4 positions itself as a premium solution for industries requiring precise motor control and superior reliability. Its core strength lies in its advanced Field Oriented Control (FOC) capabilities, enabling high torque output at low speeds and accurate speed regulation across the entire operating range, significantly outperforming standard V/f control for dynamic applications. The drive incorporates sophisticated algorithms that adapt to motor parameters, ensuring optimal performance and efficiency even with variations in load or motor characteristics. This high level of control sophistication, coupled with robust thermal management via an optimized heatsink and fan design, allows the GD350A series to maintain consistent performance in challenging environments. Its competitive advantage is further cemented by its comprehensive suite of protective functions, minimizing downtime and safeguarding valuable equipment.

Key Application Scenarios

This high-performance VFD drive is ideally suited for a wide array of demanding industrial applications where precision, efficiency, and reliability are paramount. Common scenarios include the control of pumps and fans in HVAC systems, where precise flow and pressure regulation are critical for energy savings and comfort. It excels in conveyor systems within manufacturing and logistics, providing smooth acceleration and deceleration for delicate goods and precise positioning. Furthermore, the GD350A-355G/400P-4 is highly effective in machine tools, extruders, and mixers, where maintaining consistent torque and speed under varying load conditions is essential for product quality and process stability. Its robust design also makes it suitable for heavy industries, including mining and metal processing, where harsh environmental conditions and high power demands are prevalent.

Practical System Integration Guidance

Integrating the INVT GD350A-355G/400P-4 into existing industrial systems is streamlined by its thoughtful design and comprehensive documentation. Proper wiring is crucial for optimal performance and safety; the drive requires a stable 3-phase 400V AC input, with input and output terminals clearly labeled for motor connections (U, V, W) and power supply. Grounding the drive according to local electrical codes is essential to prevent electrical interference and ensure personnel safety. For advanced control and monitoring, the integrated RS485 port facilitates communication via the Modbus RTU protocol, allowing seamless integration with PLCs and SCADA systems for remote operation and data acquisition. Initial setup and parameterization can be performed via the drive's intuitive keypad or through dedicated configuration software, which allows for precise tuning of motor parameters, acceleration/deceleration ramps, and protective functions to match specific application requirements.

Operation and Risk Mitigation

Safe and effective operation of the INVT GD350A-355G/400P-4 hinges on adherence to operational guidelines and understanding its fault diagnostic capabilities. Before powering on, ensure all wiring is secure and that the ambient temperature is within the specified operating range to prevent overheating. During operation, monitor drive status indicators for any anomalies. The drive features extensive self-diagnostic and protection functions, including overcurrent, overvoltage, undervoltage, overload, and motor over-temperature alerts, which will trigger specific fault codes displayed on the control panel. Common troubleshooting involves verifying motor connections, checking power supply stability, and ensuring parameters are correctly configured for the connected motor. Referencing the product manual for specific fault code explanations is critical for swift resolution and minimizing operational disruptions.

Scalability & Long-Term Value

The INVT GD350A-355G/400P-4 is engineered for scalability and long-term value within evolving industrial automation landscapes. Its modular design and support for various communication protocols, including optional fieldbus modules, allow for seamless integration into distributed control systems and IIoT platforms. This ensures that the drive can adapt to future upgrades in network infrastructure and automation strategies, such as integration with advanced analytics or predictive maintenance systems. The drive's robust construction and high-quality components contribute to a prolonged operational lifespan, reducing total cost of ownership. Furthermore, INVT's commitment to firmware updates and ongoing technical support ensures that the GD350A series remains a relevant and high-performing component in industrial operations for years to come.

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Frequently Asked Questions (FAQs)

1. What are the primary advantages of using the INVT GD350A-355G/400P-4 VFD?

Its advanced sensorless vector control provides superior speed and torque accuracy. The drive offers robust protection features to safeguard motors and systems. It also excels in energy efficiency, significantly reducing operational costs.

2. How does the GD350A-355G/400P-4 handle motor overload conditions?

The drive can sustain 150% overload for 60 seconds and 180% for 10 seconds. This capability ensures smooth operation during transient load peaks. It triggers overload protection to prevent motor damage if limits are exceeded.

3. What types of motors can be controlled by this VFD?

This VFD is designed to control standard 3-phase AC induction motors. It is compatible with a wide range of motor ratings within its specified power output. Accurate parameter setup is key for optimal performance with any motor.

4. Is advanced programming required to set up the INVT GD350A-355G/400P-4?

Basic setup can be done via the intuitive keypad interface. For advanced tuning, INVT provides user-friendly configuration software. This software simplifies parameter adjustments for specific applications.

5. What communication protocols does this VFD support for system integration?

It natively supports Modbus RTU via its RS485 interface for master-slave communication. Optional fieldbus modules allow integration with popular industrial networks. This ensures compatibility with diverse automation systems.

6. What are the typical operating temperature limits for the GD350A-355G/400P-4?

The drive is rated for operation between -10°C and 40°C. Performance may be affected by ambient temperature, requiring derating above 40°C. Proper ventilation is crucial for maintaining optimal operating temperatures.

7. Can the INVT GD350A-355G/400P-4 be used in dusty or humid industrial environments?

While built robustly, it is recommended to install the drive in an enclosure for harsh environments. This protects it from dust, moisture, and corrosive elements. Always follow installation guidelines for environmental protection.

8. What is the typical power factor correction capability of this VFD?

Variable frequency drives inherently improve the power factor of the motor load. This drive contributes to overall system power factor improvement. Specific power factor values depend on motor load and speed.

9. How is the braking functionality handled in the GD350A-355G/400P-4?

This model features an integrated braking unit. It can connect to external braking resistors for dynamic braking applications. This ensures rapid and controlled deceleration when needed.

10. What maintenance is recommended for the INVT GD350A-355G/400P-4 to ensure longevity?

Regular cleaning of heatsinks and checking fan operation is essential. Periodically inspect electrical connections for tightness and corrosion. Keep firmware updated to benefit from latest improvements and fixes.