INVT GD270-011-4 Special Purpose VFD for Fan & Pump

The INVT GD270-011-4 Special Purpose VFD for Fan & Pump stands as a specialized variable frequency drive engineered for optimal performance in HVAC and water supply applications. This drive excels in energy savings, precise control, and enhanced system reliability, making it a prime choice for industrial and commercial settings. Key advantages include its high-efficiency design, advanced control algorithms for smooth operation, and robust protection features safeguarding both the VFD and the connected motor.

Product Specifications

| Parameter                  | Specification                               |

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

| Model                      | GD270-011-4                                 |

| Input Voltage              | 3-Phase, 380V-440V (±10%)                   |

| Output Voltage             | 0-Input Voltage                             |

| Rated Output Capacity (kW) | 0.11 (1/6 HP)                               |

| Rated Output Current (A)   | 0.7                                         |

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

| Frequency Output Range     | 0.00-400.00 Hz                              |

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

| Overload Capability        | 150% for 60s, 180% for 10s (Typical)        |

| Braking Method             | Dynamic braking, DC injection braking       |

| Protection Features        | Overvoltage, undervoltage, overload, overheat, phase loss, etc. |

| Communication Interfaces   | RS485 (Optional)                            |

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

| Dimensions (H x W x D) mm  | 170 x 85 x 140                              |

Core Features & Market Positioning

The INVT GD270-011-4 differentiates itself through its dedicated fan and pump control algorithms, which go beyond standard VFD functionality. This specialized approach ensures superior performance in variable torque applications, leading to significant energy savings compared to conventional motor control methods. Its sensorless vector control capability allows for precise speed regulation even without encoder feedback, simplifying installation and reducing costs. Positioned as a high-value, application-specific solution, it competes effectively against general-purpose VFDs by offering tailored features that enhance operational efficiency and reduce maintenance in its target sectors.

Key Application Scenarios

This VFD is ideally suited for a wide array of fan and pump applications. In building automation, it is frequently deployed for controlling ventilation fans, air handling units (AHUs), and circulation pumps to maintain optimal indoor climate conditions while minimizing energy consumption. The GD270-011-4 is also a robust choice for water supply systems, managing pump speeds to ensure consistent pressure and flow rates in municipal water networks, industrial process water circulation, and irrigation systems. Its ability to handle variable loads makes it perfect for HVAC systems requiring precise temperature and humidity control.

Practical System Integration Guidance

Integrating the INVT GD270-011-4 into existing systems is straightforward. Ensure the input power supply aligns with the VFD's specifications (3-Phase, 380-440V). Wiring should follow standard industrial practices, connecting the main power to terminals L1, L2, L3 and the motor to T1, T2, T3. For control signals, utilize the designated digital and analog input terminals for start/stop commands, speed references, and feedback. Parameter programming, accessible via the keypad or optional communication module, allows customization for specific fan or pump characteristics, such as setting acceleration/deceleration times and overload limits.

Operation and Risk Mitigation

Safe operation of the INVT GD270-011-4 hinges on adherence to electrical safety standards and proper installation. Prior to commissioning, verify all connections and ensure the VFD is properly grounded. A common troubleshooting area involves parameter settings; incorrect V/f curves or sensorless vector parameters can lead to poor performance or motor heating. The drive incorporates numerous protection functions, including overvoltage, undervoltage, and motor overload. Critical fault codes, such as E.01 (Overvoltage) or E.03 (Overcurrent), should be addressed by investigating the system's load conditions and power supply stability. Regular inspection of cooling fan operation is also recommended to prevent thermal shutdown.

Scalability & Long-Term Value

The INVT GD270-011-4 offers excellent long-term value through its robust design and compatibility. While this specific model is tailored for smaller applications, INVT's broader product portfolio allows for scalability to larger motor sizes as system requirements grow. The optional RS485 communication interface enables seamless integration into SCADA systems or Building Management Systems (BMS), facilitating remote monitoring, control, and data acquisition, aligning with Industry 4.0 initiatives. This connectivity enhances predictive maintenance capabilities and optimizes overall system performance over the lifespan of the equipment.

Frequently Asked Questions

What is the primary application for the INVT GD270-011-4?

This VFD is specifically designed for fan and pump applications, excelling in HVAC systems. It optimizes energy usage by precisely controlling motor speed based on demand. Its core function is to reduce operational costs through efficient power delivery.

It is highly effective in variable torque environments where load requirements fluctuate. Common uses include air handling units, circulation pumps, and exhaust fans. Its advanced algorithms ensure smooth starts and stops, prolonging motor life.

The GD270-011-4 contributes significantly to system efficiency in building management and water supply networks. Its targeted design makes it a superior choice for these specific industrial needs.

Can the INVT GD270-011-4 control a motor without an encoder?

Yes, this VFD utilizes sensorless vector control technology. This advanced feature allows for precise motor speed and torque regulation without the need for an external encoder. It simplifies installation by eliminating extra wiring and components.

The sensorless vector mode provides excellent performance, including high starting torque capabilities. This makes it suitable for applications where the motor needs to overcome significant inertia upon startup. It is a cost-effective solution for many industrial tasks.

This capability ensures accurate and stable operation, even under varying load conditions. It maintains desired speed efficiently, reducing energy waste in variable load scenarios.

What are the key energy-saving benefits of using this VFD?

The GD270-011-4 achieves significant energy savings by matching motor speed to actual system demand. Instead of running at full speed constantly, it adjusts output frequency and voltage dynamically. This reduces power consumption, especially in variable torque applications.

By operating pumps and fans at lower speeds when full capacity is not needed, the VFD directly lowers electricity bills. This efficiency gain is substantial compared to fixed-speed operation or mechanical throttling methods. It also reduces wear and tear.

The optimized control algorithms further enhance efficiency. This leads to a reduced carbon footprint and lower operational expenditure over the product's lifecycle. It's a key component for green building initiatives.

How does the INVT GD270-011-4 handle motor overload protection?

The VFD offers robust overload protection to safeguard the motor and itself. It can typically handle 150% of rated current for up to 60 seconds or 180% for 10 seconds. This allows for temporary peak loads without tripping.

If the motor's current draw exceeds predefined limits for extended periods, the VFD will issue a fault code and shut down. This prevents motor overheating and potential damage to windings. Parameter settings can be adjusted for specific motor thermal characteristics.

This feature is crucial for reliable operation in demanding environments. It ensures the motor operates within safe parameters, extending its operational lifespan and preventing costly repairs or downtime.

What type of motors can be connected to the INVT GD270-011-4?

This VFD is designed to control standard three-phase induction motors. It is optimized for motors used in fan and pump applications, which are typically of the squirrel cage type. The motor's voltage rating must match the VFD's output capabilities.

It supports both sensorless vector control and V/f control modes. Ensure the motor's nameplate data, such as rated power, voltage, and frequency, is correctly configured within the VFD's parameters. This ensures optimal performance and protection.

The GD270-011-4 is rated for 0.11kW (1/6 HP) output. Always ensure the connected motor's power rating does not exceed this capacity to avoid VFD damage and ensure proper operation.

What are the typical installation requirements for this VFD?

Installation requires a stable three-phase power supply within the 380-440V range. Ensure adequate ventilation around the VFD to prevent overheating; maintain clearance as per the manual. Proper grounding of both the VFD and the motor is essential for safety and performance.

Connect the main power input to L1, L2, L3 and the motor to T1, T2, T3 terminals. Utilize the control terminals for external start/stop signals, speed references (analog or digital inputs), and any required feedback signals. Follow local electrical codes and best practices.

It's recommended to install a suitable circuit breaker or fuse upstream of the VFD for short-circuit protection. Consider input line reactors for noisy power grids or long motor cable runs to improve power quality and EMI suppression.

How is the speed of the connected fan or pump controlled?

Speed control is achieved through adjusting the output frequency and voltage supplied to the motor. The GD270-011-4 offers multiple methods for setting speed references. This includes using the integrated keypad for manual adjustments or setting a potentiometer.

External analog signals, such as 0-10V or 4-20mA, can be wired to the VFD's analog input terminals to provide a variable speed command. Digital inputs can also be configured for preset speeds or start/stop functions. The communication port allows for remote speed control.

The VFD's advanced control algorithms, particularly sensorless vector control, ensure precise speed regulation across the entire operating range, from very low to maximum speed, ensuring optimal performance for the application.

What are common fault codes for the INVT GD270-011-4?

Common fault codes include E.01 for Overvoltage and E.03 for Overcurrent. E.05 typically indicates Motor Overload, while E.07 might signal an Output Phase Loss. E.10 often refers to heatsink Over-temperature.

These codes help diagnose issues quickly. For example, Overvoltage might suggest a surge in the power supply or regenerative energy feedback, while Overcurrent points to excessive load or a motor fault. Overload suggests the motor is working too hard for too long.

Troubleshooting involves checking the specific fault code against the user manual. Solutions may range from adjusting parameters and verifying motor connections to inspecting the load and power supply stability.

Can this VFD be integrated into a Building Management System (BMS)?

Yes, the INVT GD270-011-4 can be integrated into a BMS, especially when equipped with the optional RS485 communication module. This enables remote monitoring and control capabilities. It allows for centralized management of HVAC systems.

Using protocols like Modbus RTU, the VFD can communicate vital data such as motor speed, current, voltage, and fault status. This information is crucial for system diagnostics, performance optimization, and energy management within the BMS.

Integration provides enhanced operational flexibility and efficiency. It supports predictive maintenance by allowing continuous data logging and analysis of the fan or pump system's performance.

What is the warranty period for the INVT GD270-011-4?

The warranty period for INVT products, including the GD270-011-4 VFD, typically extends for 18 months from the date of manufacture or 12 months from the date of commissioning, whichever comes first. It's essential to refer to the official warranty documentation provided by INVT or their authorized distributor for precise terms.

This warranty covers manufacturing defects and ensures the product's reliability under normal operating conditions. Proper installation, maintenance, and adherence to the operational guidelines outlined in the user manual are prerequisites for warranty claims.

Customers experiencing issues within the warranty period should contact their point of purchase or INVT customer support. They will guide the user through the necessary steps for diagnosis, repair, or replacement as per the warranty terms.