INVT GD20-045G-4 VFD for Industrial Central Water Supply
The INVT GD20-045G-4 Variable Frequency Drive (VFD) is a robust and versatile solution engineered for industrial central water supply systems. This VFD leverages advanced sensorless vector control technology, ensuring exceptional motor performance, precise speed regulation, and reliable operation under varying loads. Its compact design optimizes installation space, while features like built-in DC reactors (standard for this model's power range) enhance power factor and overall efficiency. The GD20-045G-4 boasts high overload capacity, an integrated braking unit (standard for units up to 37kW, optional for higher capacities, and present in this 45kW model), and a built-in EMC filter (C3) to minimize electrical interference. With multiple installation options and a focus on ease of use and maintenance, it stands out as a powerful choice for demanding water supply applications.
Product Specifications
| Parameter | Specification |
| :------------------------ | :-------------------------------- |
| Model Number | GD20-045G-4 |
| Rated Output Power | 45 kW (60 HP) |
| Supply Voltage | 3-Phase, 380V AC (±10% to 440V AC) |
| Rated Input Current | 98 A |
| Rated Output Current | 92 A |
| Control Modes | Sensorless Vector Control (SVC), V/f Control |
| Startup Torque (SVC) | 150% at 0.5 Hz |
| Speed Accuracy (SVC) | ±0.2% |
| Overload Capacity | 150% for 60s, 180% for 10s, 200% for 1s |
| Built-in DC Reactor | Standard |
| Integrated Braking Unit | Standard |
| Built-in EMC Filter | C3 |
| Communication Protocol | RS485 (Modbus RTU/ASCII) |
| Input/Output Terminals | Multiple I/O (refer to manual for exact counts) |
| Mounting Options | Wall Mounting, Flange Mounting |
| Operating Temperature | -10°C to 50°C |
| Protection Rating | IP20 |
Core Features & Market Positioning
The INVT GD20-045G-4 is positioned as a high-performance, general-purpose VFD designed for industrial applications demanding precise motor control and robust reliability. Its sensorless vector control (SVC) offers excellent dynamic performance and torque accuracy, comparable to closed-loop systems but without the need for a motor encoder. This makes it particularly well-suited for applications like central water supply where consistent pressure and flow are critical. The GD20 series distinguishes itself with an optimized structural design, contributing to its compact dimensions and saving valuable installation space. Furthermore, the inclusion of features such as a built-in DC reactor (standard for 18.5-110kW models) enhances power factor and reduces harmonic distortion, while the integrated braking unit (standard for ≤37kW and available for 45-110kW models) provides effective braking torque without external components. These integrated functionalities and advanced control capabilities place the GD20-045G-4 competitively against other industrial VFDs, offering a blend of performance, efficiency, and cost-effectiveness.
Key Application Scenarios
The INVT GD20-045G-4 is exceptionally well-suited for industrial central water supply systems due to its advanced PID control capabilities and reliable operation. This VFD can maintain constant pressure and flow rates, crucial for efficient water distribution in municipal, commercial, and industrial settings. Beyond water supply, its versatility extends to other applications demanding precise motor speed management:
Pumps and Fans: Optimizes energy consumption in HVAC systems, agricultural irrigation, and industrial ventilation. Compressors: Provides variable speed control for air and gas compressors, leading to significant energy savings. Conveyor Systems: Enables precise speed adjustments for material handling and process lines. Processing Machinery: Ideal for equipment in sectors like food and beverage, textiles, paper manufacturing, and plastic processing where consistent operational speeds are vital. Water Treatment Facilities: Its robust control and PID features are beneficial for various stages of water and wastewater treatment processes.
Practical System Integration Guidance
Integrating the INVT GD20-045G-4 into an industrial system is facilitated by its thoughtful design and communication capabilities. For installation, the 45kW model supports wall and flange mounting, offering flexibility to fit diverse cabinet and panel layouts. Proper wiring is essential; the main circuit terminals (R, S, T for input, U, V, W for output) connect to the power supply and motor respectively. Control circuit wiring involves connecting digital and analog inputs/outputs, as well as communication interfaces like RS485 for integration with SCADA or Building Management Systems.
Programming the VFD for water supply applications typically involves configuring the built-in PID controller. This requires setting the target pressure or flow rate, adjusting the PID loop parameters (P, I, D gains), and defining the input source for the feedback signal (e.g., a pressure transducer connected to an analog input). Auto-tuning of motor parameters, both static and dynamic, is crucial for optimal performance and is readily available through the VFD's interface. For communication, the standard RS485 interface with Modbus RTU/ASCII support allows for seamless integration into networked control systems, enabling remote monitoring and parameter adjustment.
Operation and Risk Mitigation
Safe and efficient operation of the INVT GD20-045G-4 relies on understanding its protection features and adhering to operational best practices. The VFD is equipped with comprehensive fault protection functions, including overcurrent, overvoltage, undervoltage, overheating, phase loss, and overload detection. When a fault occurs, the VFD will typically display an error code, which can be cross-referenced with the user manual for troubleshooting.
Common troubleshooting steps for issues like overcurrent might involve checking if the acceleration time is too short, if the load is excessively high, or if motor parameters are incorrectly set. If an "OUT" phase IGBT error occurs, it could indicate a damaged IGBT module, improper grounding, or a VFD power loss. Regular maintenance, such as cleaning cooling fans and checking connections, is recommended to prevent issues. For enhanced safety, the GD20 series supports the Safe Torque Off (STO) function, which provides a reliable safety mechanism by quickly disconnecting power to the motor in emergency situations.
Scalability & Long-Term Value
The INVT GD20-045G-4 offers considerable long-term value through its inherent scalability and compatibility with modern industrial automation trends. Its RS485 communication port enables integration into larger control networks and IIoT platforms, facilitating data acquisition and remote management. This allows for advanced diagnostics, predictive maintenance, and optimization of energy usage within a broader digital ecosystem.
The GD20 series is designed with modularity in mind, with features like independently removable cooling fans making maintenance easier and reducing downtime. Furthermore, the availability of optional accessories, such as external keypads with parameter copy functions, simplifies device replacement and system expansion. For applications requiring advanced control or multi-drive synchronization, the VFD's capabilities, including its simple PLC function and support for Modbus communication, provide a foundation for more complex system architectures. This ensures that the GD20-045G-4 can adapt to evolving operational demands and integrate seamlessly with future upgrades in industrial automation technology.
Frequently Asked Questions
Q1: What are the primary advantages of using the INVT GD20-045G-4 VFD for a central water supply system?
The GD20-045G-4 excels with its advanced Sensorless Vector Control (SVC), ensuring precise and stable pressure regulation critical for water distribution. Its integrated PID controller allows for automated adjustments to meet demand fluctuations efficiently. The VFD also offers significant energy savings by matching motor speed to the exact pumping requirement, unlike fixed-speed pumps.
This drive features robust overload capacity, handling sudden demand spikes without tripping. Its built-in DC reactor improves power factor and reduces harmonic distortion on the power grid. The integrated braking unit ensures rapid and safe stops when necessary, enhancing operational safety and control.
Furthermore, the GD20-045G-4 supports RS485 communication for integration into SCADA systems, enabling remote monitoring and control. Its durable design and comprehensive protection features contribute to a long operational lifespan and reduced maintenance needs.
Q2: How does the Sensorless Vector Control (SVC) of the INVT GD20-045G-4 benefit water pump applications?
SVC on the GD20-045G-4 provides high torque output at low speeds without needing a motor encoder. This is crucial for pumps, as it ensures consistent torque delivery even when starting against a full load or operating at low flow rates. The precise speed accuracy of ±0.2% ensures stable water pressure, preventing fluctuations that can affect downstream processes or equipment.
SVC minimizes the complexity and cost associated with traditional closed-loop systems by eliminating the need for encoder wiring and maintenance. This simplifies installation and reduces potential points of failure, making it ideal for remote or challenging water supply environments. The technology also offers faster response times to changes in system demand, allowing the VFD to quickly adjust pump speed.
By delivering precise motor control, SVC helps optimize pump efficiency, reducing energy consumption and operating costs. This advanced control mode also contributes to smoother pump operation, minimizing mechanical stress and extending the lifespan of pumps and associated pipework.
Q3: What are the key technical specifications of the INVT GD20-045G-4 related to power and performance?
The INVT GD20-045G-4 is rated for a 45 kW (approximately 60 HP) motor output power, suitable for substantial industrial pump applications. It operates on a 3-phase, 380V to 440V AC power supply, with a rated input current of 98A and a rated output current of 92A. Its high overload capacity, rated at 150% for 60 seconds, 180% for 10 seconds, and 200% for 1 second, allows it to handle transient load demands effectively.
The drive supports both V/f and Sensorless Vector Control (SVC) modes, offering flexibility in motor control strategy. With SVC, it can achieve a startup torque of 150% at 0.5 Hz and maintain speed accuracy within ±0.2%, ensuring precise flow and pressure. The inclusion of a built-in DC reactor standard for this power range improves the power factor and system efficiency.
The unit features an integrated braking unit as standard for models up to 37kW and is available for higher capacities, which is beneficial for controlled deceleration and holding loads. It also incorporates a C3-class EMC filter to reduce electromagnetic interference in industrial environments.
Q4: How can the INVT GD20-045G-4 be integrated into existing industrial control systems?
The GD20-045G-4 is equipped with a standard RS485 communication port supporting Modbus RTU and ASCII protocols, facilitating seamless integration with PLCs, HMIs, and SCADA systems. This allows for remote monitoring of operational status, parameters, and fault logs, as well as remote control of the VFD. Its multiple digital and analog I/O terminals provide flexibility for connecting external sensors, switches, and control signals, enabling complex automation sequences.
The VFD's compatibility with industry-standard communication protocols ensures interoperability with a wide range of automation hardware and software platforms. This makes it adaptable to both new installations and retrofits of existing systems. Optional communication modules may also be available for integration with other fieldbus networks, further enhancing its connectivity options.
The ability to configure parameters via software tools, often through the RS485 interface, simplifies setup and troubleshooting. Parameter settings can be backed up and restored, easing maintenance and replacement processes. This level of integration capability maximizes the VFD's utility in sophisticated industrial control architectures.
Q5: What are the typical application scenarios for the INVT GD20-045G-4 beyond central water supply?
Beyond central water supply, the INVT GD20-045G-4 is highly versatile for various industrial applications requiring precise motor speed control. It is excellent for pump and fan applications in HVAC systems, industrial ventilation, and irrigation, where energy efficiency is paramount. The drive's robust torque performance makes it suitable for compressors, ensuring stable operation and reduced energy consumption.
In material handling, it can drive conveyor systems, providing adjustable speeds for optimized throughput and product handling. Its precise control is also valuable for processing machinery in sectors like food and beverage, paper, textiles, and plastics, ensuring consistent product quality and operational efficiency. The VFD's ability to handle varying loads and provide dynamic braking further extends its applicability to applications such as winding equipment and printing machinery.
Its integrated PID controller is also beneficial for process control applications beyond simple speed regulation, such as maintaining constant temperature in heating or cooling systems. The availability of Safe Torque Off (STO) enhances safety, making it suitable for machinery with higher safety requirements.
Q6: What installation and maintenance considerations are important for the INVT GD20-045G-4?
For installation, the GD20-045G-4 (45kW model) supports wall and flange mounting, allowing for flexible integration into control cabinets. It is crucial to ensure adequate ventilation around the VFD and maintain specified clearance distances, especially for side-by-side installations, to prevent overheating. Proper wiring of main and control circuits, using appropriately sized cables and grounding, is essential for safe and reliable operation. A minimum waiting time after power disconnection must be observed before maintenance.
Maintenance typically involves periodic cleaning of cooling fans and heatsinks to ensure efficient heat dissipation. Checking electrical connections for tightness and inspecting for any signs of wear or damage is also recommended. The VFD's modular design, including independently removable cooling fans, simplifies maintenance tasks and reduces downtime. Parameter backup via an external keypad or communication interface is advised for quick restoration after component replacement.
Adhering to environmental conditions, such as operating temperature range (-10°C to 50°C), is critical for longevity. If the ambient temperature exceeds 40°C, derating may be necessary. Following the guidelines in the operation manual is paramount for safe installation and maintenance.
Q7: Does the INVT GD20-045G-4 feature built-in safety functions?
Yes, the INVT GD20-045G-4 integrates several safety features. It supports the Safe Torque Off (STO) function, a critical safety measure that ensures the motor cannot unexpectedly start or move by safely disconnecting power to the motor. This function meets relevant safety standards and is vital for applications where operator safety is a primary concern.
The VFD also provides comprehensive built-in protection functions to safeguard itself and the motor from electrical faults. These include overcurrent, overvoltage, undervoltage, overheating, phase loss, and overload protection. These internal protections help prevent damage and reduce the likelihood of equipment failure during operation.
Additionally, the drive is equipped with a C3-class EMC filter, which helps minimize electromagnetic interference, contributing to a more stable and reliable operating environment. Proper installation and adherence to safety guidelines outlined in the operation manual are essential to leverage these safety features effectively.
Q8: What is the role of the built-in PID controller in the GD20-045G-4 for water supply systems?
The built-in PID controller in the GD20-045G-4 is instrumental in maintaining precise and constant pressure or flow rates within a water supply network. It continuously compares the actual system feedback (e.g., pressure from a sensor) with the desired setpoint and automatically adjusts the motor speed to minimize any deviation. This ensures a stable and consistent water supply without manual intervention.
The PID controller's parameters (Proportional, Integral, Derivative) can be tuned to optimize the system's response. This allows for achieving desired pressure levels quickly without overshooting or causing oscillations, which is crucial for sensitive water systems. The controller can also incorporate features like dormancy checking, where the pump reduces speed or stops when demand is low, and wakes up upon detecting a pressure drop.
By accurately regulating pump speed based on real-time demand, the PID function ensures that energy is consumed only as needed, leading to significant operational cost savings. It also contributes to smoother system operation, reducing wear and tear on pumps and pipes by avoiding unnecessary high-speed operation or abrupt stops.
Q9: What communication capabilities does the INVT GD20-045G-4 offer?
The INVT GD20-045G-4 comes standard with an RS485 communication port, enabling integration via the Modbus RTU and Modbus ASCII protocols. This allows it to be networked with other devices, such as PLCs, HMIs, and central control systems (SCADA), for remote monitoring and control. Users can read operational data, check fault statuses, and adjust parameters remotely.
The VFD also offers flexible I/O configurations, including analog inputs for sensor feedback and digital inputs for control signals, which can be programmed to interface with various external devices. An optional external LED keypad with a parameter copy function is available, simplifying the setup of multiple drives or parameter backup and restoration.
This connectivity allows for the implementation of advanced automation strategies, data logging for performance analysis, and integration into IIoT platforms for smarter industrial operations. The communication features enhance the VFD's adaptability and long-term value in connected industrial environments.
Q10: What are the power and current ratings for the INVT GD20-045G-4?
The INVT GD20-045G-4 is a 45 kW (kilowatt) rated Variable Frequency Drive. In horsepower terms, this is equivalent to approximately 60 HP. For its rated power, the VFD draws a maximum input current of 98 Amperes. The drive is designed to deliver a maximum output current of 92 Amperes to the connected motor.
These ratings indicate its capacity to drive large industrial motors effectively. The VFD is designed for a 3-phase input voltage of 380V AC, with a tolerance allowing for operation up to 440V AC. Its robust current handling capabilities, combined with its high overload capacity, make it suitable for demanding applications in industrial settings, such as central water supply systems.
