GK620 is a general-purpose AC drive designed for flexible and reliable AC motor control in a wide range of industrial equipment. Supporting V/f control and sensorless vector control, GK620 provides stable speed regulation, accurate torque control, and flexible operation for different motor applications.
With its comprehensive control functions and multiple configuration options, GK620 can be applied as a practical Variable Frequency Drive (VFD) solution for industrial machinery, including air compressors, cranes and lifts, metal processing equipment, mining machinery, mills, food and beverage processing systems, packaging machines, conveyors, textile equipment, plastics machinery, fans, and pumps.
Abundant frequency setting sources.
Online and offline auto-tuning both available.
Diverse input and output terminals.GK620 Technical Features
| Power input | Rated input voltage | 200V level: single/three phase 220V~240V |
| 400V level: three phase 380V~440V | ||
| Frequency | 50Hz/60Hz, tolerance ±5% | |
| Voltage range | Continuous voltage fluctuation ±10%, short fluctuation -15%~+10%, i.e. 200V: 170V~264V, 400V: 323V~484V | |
| Voltage out-of-balance rate <3%, distortion rate as per the requirements of IEC61800-2 | ||
| Rated input current | See Section 2.3 | |
| Power output | Applicable motor (kW) | See Section 2.3 |
| Rated current (A) | See Section 2.3 | |
| Output voltage (V) | 3-phase: 0~ rated input voltage, error < ±3% | |
| Output frequency (Hz) | 0.00~ 600.00Hz; unit: 0.01Hz | |
| Overload capacity | 150% – 1min, 180% – 10s, 200% – 0.5s every 10 min | |
| Control characteristics | V/f patterns | V/f control |
| Sensor-less vector control 1 | ||
| Sensor-less vector control 2 | ||
| Synchronous motor sensor-less vector control | ||
| Range of speed regulation | 1:100 (V/f control, sensor-less vector control 1) | |
| 1:200 (sensor-less vector control 2, synchronous motor sensor-less vector control) | ||
| Speed accuracy | ±0.5% (V/f control) | |
| ±0.2% (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control) | ||
| Speed fluctuation | ±0.3% (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control) | |
| Torque response | < 10ms (sensor-less vector control 1 & 2, synchronous motor sensor-less vector control) | |
| Starting torque | 0.5Hz: 180% (V/f control, sensor-less vector control 1) | |
| 0.25Hz: 180% (sensor-less vector control 2, synchronous motor sensor-less vector control) | ||
| Basic functions | Start frequency | 0.00~ 600.00Hz |
| Accel Decel time | 0.00~60000s | |
| Switching frequency | 0.7kHz~16kHz | |
| Frequency setting | Digital setting + control panel ∧/∨ | |
| Digital setting + terminal UP/DOWN | ||
| Communication | ||
| Analog setting (AI1/AI2/EAI) | ||
| Terminal pulse setting | ||
| Motor start-up methods | Started from starting frequency | |
| DC brake start-up | ||
| Flying start | ||
| Motor stop methods | Ramp to stop | |
| Coast to stop | ||
| Ramp stop + DC brake | ||
| Dynamic braking capacity | Brake chopper working voltage: | |
| 400V level: 650V-750V | ||
| Service time: 0-100.0s; brake chopper for GK620-4T55G/75L and below are inbuilt or can be inbuilt optionally. See table 2-1 | ||
| DC brake capacity | DC brake start frequency: 0.00~600.00Hz | |
| DC brake current: 0.0~100.0% | ||
| DC brake time: 0.0~30.00s | ||
| Input terminals | 6 digital inputs, one of which can be used for high-speed pulse input, and compatible with active open collectors NPN, PNP and dry contact input. Digital inputs can be extended to 7 | |
| 2 analog inputs, one of which is voltage/current programmable, and the other supports voltage only. Analog inputs can be extended to 3, and the extended one is voltage/current programmable | ||
| Output terminals | 1 high-speed pulse output, 0~50kHz square wave signal output. It can output signals such as frequency setting, or output frequency, etc. | |
| 1 digital output | ||
| 1 relay output (can be extended to 2) | ||
| 1 analog output (can be extended to 2), voltage/current output programmable; can output signals such as frequency setting, or output frequency, etc. | ||
| Featured functions | Parameter copy, parameter backup, common DC bus, free switchover between two motors’ parameters, flexible parameter displayed & hidden, various master & auxiliary setting and switchover, flying start, a variety of Accel/Decel curves optional, automatic correction of analog, brake control, 16-step speed control programmable (2-step speed supports flexible frequency command), wobble frequency control, fixed length control, count function, three history faults, over excitation brake, over voltage stall protection, under voltage stall protection, restart on power loss, skip frequency, frequency binding, four kinds of Accel/Decel time, motor thermal protection, flexible fan control, process PID control, simple PLC, multi-functional key programmable, droop control, autotuning, field-weakening control, high-precision torque restraint, V/f separated control | |
| Protection functions | Refer to Chapter 7- Troubleshooting | |
| Environment | Place of operation | Indoors, no direct sunlight, free from dust, corrosive gases, flammable gases, oil mist, water vapor, water drop or salt, etc. |
| Altitude | 0-2000m. De-rate 1% for every 100m when the altitude is above 1000 meters | |
| Ambient temperature | -10℃-40℃. The rated output current should be derated 1% for every 1℃ when the ambient is 40℃-50℃ | |
| Relative humidity | 0~95%, no condensation | |
| Vibration | Less than 5.9m/s2 (0.6g) | |
| Storage temperature | -40℃~+70℃ | |
| Others | Efficiency at rated Amps | Rated power |
| 7.5kW and below: ≥93% | ||
| 11~ 45kW: ≥ 95% | ||
| 55kW and above: ≥98% | ||
| Installation | Wall-mounted | |
| IP grade | IP20 | |
| Cooling method | Forced air cooling |
GK620 supports multiple motor control methods, including V/f control and sensorless vector control, allowing users to select a suitable control mode based on the motor and application.
The drive supports several frequency setting methods, including digital settings, control panel operation, terminal UP/DOWN control, analog inputs, pulse input, and communication.
This flexibility makes the AC Motor Drive easier to integrate with different machine control systems and automation architectures.
GK620 provides multiple digital and analog inputs and outputs for connection with external control devices. The available I/O functions can be configured for different control and monitoring requirements.
GK620 provides functions for acceleration and deceleration control, flying start, DC braking, stall protection, motor thermal protection, and other operating conditions.
These functions help maintain stable motor operation during starting, stopping, load changes, and other conditions commonly encountered in industrial machinery.
In addition to basic speed control, GK620 includes functions such as PID control, simple PLC, multi-step speed control, skip frequency, droop control, parameter backup, parameter copy, and automatic tuning.
These functions allow the industrial VFD to handle more application requirements without relying entirely on additional control components.
The GK620 General Purpose AC Drive can be used in machinery and production systems that require adjustable motor speed, controlled acceleration and deceleration, or stable motor operation.
GK620 can be applied to pump and fan systems where motor speed needs to be adjusted according to operating requirements. Typical applications include industrial water pumps, ventilation equipment, and other variable-load systems.
For air compressor applications, the drive provides adjustable motor speed and multiple control functions to support different operating conditions and equipment configurations.
GK620 can be used for conveyor and material handling equipment where controlled starting, stopping, and speed adjustment are required. This includes production-line conveyors, packaging lines, and other material transfer systems.
The drive can be applied to cranes and lifting machinery requiring controlled motor operation. Its acceleration, deceleration, braking, and motor control functions can be configured according to the requirements of the equipment.
For metal processing machinery and mills, stable motor speed and torque control are important for maintaining consistent equipment operation. GK620 can be used in different types of processing and production equipment according to the motor and load requirements.
GK620 is also suitable for machinery used in packaging, textile, plastics, and other manufacturing processes. Adjustable motor speed allows equipment manufacturers and system integrators to adapt drive operation to different production requirements.
The GK620 AC Drive combines multiple control modes, frequency setting methods, I/O functions, and application-oriented control features within one drive platform. This makes it suitable for machine builders, system integrators, and industrial users looking for a flexible motor speed control solution.
For applications involving pumps, fans, conveyors, compressors, and general manufacturing machinery, the appropriate control mode and drive configuration can be selected according to the motor and actual operating conditions.
By varying the output frequency and voltage, a Variable Frequency Drive allows motor speed to be adjusted according to the requirements of the connected equipment.
Acceleration and deceleration settings, flying start, DC braking, and related functions provide greater control over motor starting and stopping compared with direct fixed-speed operation.
Multiple input and output options and communication-based frequency setting allow GK620 to be integrated into different machine control and industrial automation systems.
The combination of motor control modes and application functions allows the same drive platform to be used across different types of industrial equipment, reducing the need for separate drive solutions for every general-purpose application.
A General Purpose AC Drive is used to control the speed and operation of AC motors by regulating the output frequency and voltage. It is commonly used in industrial machinery where adjustable motor speed, controlled acceleration, or improved motor operation is required.
GK620 is suitable for a wide range of applications, including air compressors, cranes and lifts, metal processing, mills, packaging, conveyors, textile machinery, plastics processing, fans, pumps, and other general industrial equipment.
Yes. GK620 supports sensorless vector control as well as V/f control. Different control modes can be selected according to the motor and application requirements.
GK620 supports multiple frequency setting methods, including digital setting, control panel operation, terminal UP/DOWN control, analog input, pulse input, and communication.
GK620 can regulate motor speed according to the operating requirements of pump and fan systems. This allows the motor to operate at an appropriate speed instead of continuously running at a fixed speed.
