Are you looking for a detailed guide on how to use GD20 Variable Frequency Drive to operate your motor safely and efficiently? Mastering the entire process from installation and wiring to parameter configuration is key to optimizing system performance, saving energy, and extending equipment lifespan. This article from Thanh Thai Motor will provide you with a comprehensive roadmap to help you confidently master your INVT GD20 Variable Frequency Drive.
General Introduction to the GD20 Variable Frequency Drive
As a compact, versatile Variable Frequency Drive (inverter) from the INVT brand, it is widely applied across various industries. With high performance and an affordable price, the INVT GD20 Variable Frequency Drive is a popular choice, regarded as a budget-friendly yet highly stable Variable Frequency Drive. Understanding how to operate this Variable Frequency Drive will help you unlock its full potential.
Common Functions and Applications
The INVT GD20 Variable Frequency Drive is designed to control the speed of 3-phase asynchronous motors, providing soft-start capabilities, flexible speed adjustment, and comprehensive motor protection. Typical applications include:
Packaging machines, labeling machines
Conveyor belts, production lines
Textile machines, spinning machines
Water pumps, ventilation fans, pressure regulating fans
Food processing machines, small machine tools
Key Technical Features
V/F control and sensorless vector control (SVC).
High starting torque: 150% at 0.5Hz.
Built-in braking unit for models up to 30kW.
Detachable keypad, convenient for mounting on the Variable Frequency Drive enclosure door.
Supports Modbus RS485 communication.
Compact design, easily installed in tight spaces. This is one of the most popular industrial Variable Frequency Drives.
General introduction to the GD20 Variable Frequency Drive
Preparation Before Using the Variable Frequency Drive
The preparation stage is extremely important to ensure safety and durability for the Variable Frequency Drive. Skipping this step may lead to equipment damage or unstable operation. This is the first step in learning how to use GD20 Variable Frequency Drive safely.
Checking the Load and Motor Current
Confirm the load type: Heavy duty (compressors, crushers) or light duty (pumps, fans).
Check that the rated motor current (on the nameplate) is less than or equal to the rated current of the Variable Frequency Drive. Avoid choosing a Variable Frequency Drive capacity too close to the motor’s power; a safety margin of about 20-30% is recommended.
Ensure the power supply voltage matches the rated voltage of the Variable Frequency Drive (e.g., a 220V Variable Frequency Drive for a 1-Phase 220V power supply, or a 380V Variable Frequency Drive for a 3-phase 380V supply).
Evaluating the Installation Environment (Temperature, Humidity, Altitude)
Ambient Temperature: Best operated between -10°C and 40°C. If the temperature is higher, derating or enhanced cooling is required.
Humidity: Below 95% RH, non-condensing.
Altitude: Install below 1000m above sea level. Above this level, heat dissipation efficiency decreases, requiring a higher capacity Variable Frequency Drive.
Environment: Avoid installing the Variable Frequency Drive in areas with metal dust, grease, corrosive chemicals, high moisture, or strong vibrations.
Installation Guide for GD20 Variable Frequency Drive
Proper installation ensures good heat dissipation and long-lasting operation. This procedure applies whether you are installing a single Variable Frequency Drive or mounting it inside a complete control cabinet.
Standard Installation Positioning
The Variable Frequency Drive should be installed vertically on a solid, non-combustible surface such as a wall or the metal plate inside an electrical cabinet. This allows air to flow naturally from bottom to top through the cooling fins.
Securing the Drive and Heat Dissipation Clearances
Use screws or bolts to securely fasten the Variable Frequency Drive through the mounting holes pre-designed by the manufacturer.
To ensure effective heat dissipation, maintain minimum clearances: 100mm at the top and bottom, and 50mm on the sides. If installing multiple Variable Frequency Drives close to each other, consider adding an exhaust fan to the cabinet.
Installation Guide for GD20 Variable Frequency Drive
Technical Wiring for GD20 Variable Frequency Drive
Wiring a Variable Frequency Drive requires absolute care and precision to avoid short circuits or fires. Always disconnect the power supply before proceeding. This is the most critical step in learning how to use GD20 Variable Frequency Drive.
Terminal Diagram for Power and Motor Connections
Power Input (Input):
For a 1-Phase Variable Frequency Drive: Connect the L and N lines to terminals R and T (or L1 and L2). This is the standard wiring method for a 1-Phase 220V Variable Frequency Drive.
For a 3-phase Variable Frequency Drive: Connect the three phase wires to terminals R, S, and T.
Motor Output (Output): Connect the three motor wires to the U, V, and W terminals of the Variable Frequency Drive. Never connect the main power supply to these terminals.
Grounding Terminal (PE/GND): Connect the Variable Frequency Drive enclosure and motor frame to the factory’s grounding system.
Wiring Guide for Analog, Digital, and RS485 Signals
Depending on your control requirements, you can connect the following signal terminals:
Run/Stop Command via External Switch: Connect the COM terminal to one terminal of the switch, and the other switch terminal to the S1 terminal (forward run command).
Speed Control via External Potentiometer: Connect the 10V terminal of the Variable Frequency Drive to one of the outer pins of the potentiometer, the GND terminal to the other outer pin, and the wiper (middle pin) of the potentiometer to the AI1 terminal.
RS485 Communication: Connect the 485+ and 485- terminals of the Variable Frequency Drive to a PLC or HMI for centralized control.
Basic Parameter Settings for GD20 Variable Frequency Drive
After physical installation and wiring, the next step is configuring the parameters of the GD20 Variable Frequency Drive to match your specific application. Setting up the Variable Frequency Drive correctly ensures the motor runs smoothly and efficiently. These parameters are also similar to those on many other Chinese Variable Frequency Drives.
Explanation of Key Parameters (P00.00, P00.01, P00.03…)
P00.00 = 1: Restore Variable Frequency Drive parameters to factory default settings.
P00.01 = 1: Select run/stop command from terminal (external switch). Select 0 to run/stop via the RUN/STOP key on the keypad.
P00.03: Maximum Frequency (Max Frequency). Usually set to 50.00Hz.
P00.04: Upper limit frequency. Set equal to P00.03.
P00.06 = 2: Select frequency source (speed control source) from external potentiometer (AI1 terminal). Select 0 to control using the Up/Down keys on the keypad.
P00.11: Acceleration time (seconds).
P00.12: Deceleration time (seconds).
P02.01 to P02.04: Motor parameters (power, frequency, speed, current). It is highly recommended to enter these exactly as written on the motor nameplate for optimal Variable Frequency Drive protection.
How to Use the Integrated and External Keypads
The keypad of the GD20 Variable Frequency Drive features these main buttons:
PRG/ESC: Enter/exit programming mode.
DATA/ENT: Access parameter groups or save modified values.
Up/Down Arrow Keys: Used to navigate between parameters or modify values.
RUN/STOP: Start/stop the motor during local control.
Operating and Testing the GD20 Variable Frequency Drive
Once configurations are complete, run a trial test on the motor to verify. This is the final verification step in the process of learning how to use GD20 Variable Frequency Drive.
Motor Trial Run Guide
Power on the Variable Frequency Drive. The display will light up and show a frequency of 0.00.
If using keypad control (P00.01=0), press the RUN key. The motor will begin rotating and accelerate to the set frequency.
If using external switch control (P00.01=1), turn on the switch to run.
Check the rotation direction of the motor. If it is reversed, turn off the power and swap any two of the three output phases (U, V, W).
Observe if the motor experiences vibration, overheating, or emits unusual noises.
Reading Drive Status and Basic Troubleshooting
The Variable Frequency Drive LED display can show operating parameters such as output frequency, current, and voltage. In the event of a fault, the Variable Frequency Drive will trip and display a fault code (e.g., OU for overvoltage, OL for overload). You should refer to the manual to find the cause and solution for these faults. Learning how to use GD20 Variable Frequency Drive also includes handling these simple troubleshooting steps.
Operating and testing the GD20 Variable Frequency Drive
Copying and Saving Configured Drive Parameters
The parameter copy feature is extremely useful when setting up multiple identical machines, saving time and ensuring consistency.
Benefits of Parameter Copying
Saves parameter configuration time for subsequent Variable Frequency Drives.
Ensures all machines in the line share the same operational configuration.
Allows easy replacement of a faulty Variable Frequency Drive with a new one without starting the configuration process from scratch.
How to Copy Parameters on GD20
With the GD20 Variable Frequency Drive, you can use an external keypad to copy parameters. Simply plug the keypad into the master Variable Frequency Drive and execute the parameter upload command to save them to the keypad. Next, plug this keypad into the new Variable Frequency Drive and execute the download command. This process makes Variable Frequency Drive maintenance faster than ever.
Safety Warnings for Using the GD20 Variable Frequency Drive
Workplace safety is always the top priority. Regardless of which model you purchase-from 220V to 380V Variable Frequency Drives-compliance with safety rules is mandatory.
Do not touch the main power terminals (R, S, T, U, V, W) or the cooling fins while the Variable Frequency Drive is running.
After turning off the power, wait at least 5-10 minutes for the internal capacitors to discharge fully before handling.
Always ensure proper grounding.
Never connect the power supply lines to the U, V, and W outputs of the Variable Frequency Drive.
Use protection devices such as circuit breakers (CB) and contactors for the power supply circuit.
Variable Frequency Drive Price List for 10/2026 at Thanh Thai Motor
Purchasing Policy and Commitment at Thanh Thai Motor
Extended 24-Month Warranty
All VFDs (VFD cabinets or VFD units) supplied by Thanh Thai Motor are from renowned Chinese VFD manufacturers and come with an official warranty of up to 24 months. We are committed to providing absolute peace of mind with transparent, fast, and dedicated after-sales service.
Nationwide Door-to-Door Delivery
No matter where you are in Vietnam, we ensure that products are delivered to you quickly, safely, and on time, without geographical limitations.
European Standard Quality, German Technology
Thanh Thai Motor's 1-phase 220V VFDs or 3-phase 220V/380V VFDs are manufactured using advanced German technology and strictly meet European quality standards. This ensures the equipment has superior durability and stable operation over a long period, suitable for industrial VFD products.
Competitive Pricing, Discounts for Partners and Bulk Orders
We always offer reasonable VFD prices for 1-phase or 3-phase VFDs, along with many attractive discount policies exclusively for dealers and bulk buyers with the most affordable VFD prices. The more you buy, the higher the discount, helping to optimize your profit.
Complete, Transparent Documentation (CO, CQ)
Each VFD is provided with a full Certificate of Origin (CO) and Certificate of Quality (CQ). These documents are clear proof of origin and quality, providing absolute confidence to customers when purchasing VFDs for projects requiring technical documentation.
Are you looking for the most suitable motor VFD for your system? Do not hesitate to contact Thanh Thai Motor immediately through the following channels:
Frequently Asked Questions on how to use GD20 Variable Frequency Drive
Below are some common questions that Thanh Thai Motor frequently receives from customers.
What is the standard method for wiring a Variable Frequency Drive?
Always follow the diagram in the technical documentation. Ensure all terminal screws are tightly fastened and use appropriate wire lugs for secure connections. Clearly distinguish between the main power circuit and the control circuit.
How do I find the cheapest Variable Frequency Drive?
Instead of searching for the cheapest Variable Frequency Drive, look for a reputable supplier that offers reasonable pricing along with robust technical support and a good warranty. Thanh Thai Motor is committed to providing genuine Variable Frequency Drives at highly competitive prices.
How do I copy parameters between drives?
Use an external INVT keypad. Upload the parameter set from the master Variable Frequency Drive to the keypad, and then download it to the new Variable Frequency Drives.
Where should I buy a Variable Frequency Drive to ensure high quality?
You should purchase your Variable Frequency Drive from official distributors or experienced dealers like Thanh Thai Motor to receive expert advice, genuine products, and comprehensive warranty coverage. If you need to buy a Variable Frequency Drive, please feel free to contact us.
What is the suitable operating temperature for a motor Variable Frequency Drive?
Most Variable Frequency Drives, including the Variable Frequency Drive – 4500, perform best at ambient temperatures below 40°C. Higher temperatures will reduce the lifespan and efficiency of the device.
Conclusion
The GD20 Variable Frequency Drive is an excellent solution for motor speed control, optimizing efficiency and saving energy. Through this article, you have mastered how to use GD20 Variable Frequency Drive in detail. We hope the information shared will help you easily implement and operate your equipment effectively. Always adhere to the guidelines to ensure the stability and durability of your system.
