3.7 kW Frequency Inverter, 3 Phase 220V, 380V, 480V

$293.51

| 4 review(s) | Add your review

Favorable price 3.7 kW vfd inverter, 3 phase variable frequency drive 220V, 380V, 480V. Input frequency 50Hz/ 60Hz, output frequency 0~1000Hz, current vector control, and V/F control mode for 3 phase motor speed control. With RS485 communication mode, the frequency drive inverter has an IP 20 enclosure rating, durable and rugged.

Free shipping

Delivery date: 3-10 days

SKU: GK3000-4T0037G

Input Voltage (Three Phase) ±15% *

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Overview
Specs
FAQ
Reviews

Overview

3.7 kW (5 hp) 3 phase variable frequency drive, RS485 communication mode and IP20 enclosure rating. Equipped with a digital screen, the vfd inverter 3 phase works at (–10℃, 40℃). It usually applies to machinery and equipment, the chemical industry, the oil and gas industry, home appliances and motors, etc.

Feature

The control methods of the 3 phase inverter include V/F control and sensorless vector control.
The frequency drive inverter has a variety of protection functions, such as overcurrent protection, overvoltage protection, grounding protection, and overheating protection.
The installed multi-function keyboard and manual knob make it easy to adjust the operating speed of the variable frequency inverter by yourself.
Equipped with RS485 communication interface and IP20 shell protection, the three phase inverter is made of solid material and has good impact resistance and heat resistance.

Details

Multiple Function Keyboard

The multiple-function keyboard of the 3.7kw 3 phase variable frequency drive controls the operation of the 3.7kw variable frequency drive inverter, such as start, stop, and acceleration. The user can press the corresponding button to make the frequency inverter work according to the set inverter parameters or control the inverter machine's operating speed.

Electronic Screen

The electronic screen of the frequency drive inverter is a key component in the control system, providing users with an intuitive and real-time information display. The electronic screen can monitor the operating status of the variable frequency drive inverter in real-time, including input and output voltage, and current waveform, which helps to detect abnormal conditions in time.

Rugged Casing

The 3.7 kw variable frequency drive inverter's rugged casing plays multiple roles in its design. It is not only about protecting the circuits and electronic components inside the device but also about the safety, stability, and reliability of the device. The three phase variable frequency drive not only protects the internal circuits and components but also provides safety protection.

Applications

Car Manufacturer

Ship Operation

Energy Generation

Building Construction

Specs

Basics	Model	GK3000-4T0037G/ GK3000-2T0037G
	Capacity	3.7 kW (5 hp)
	Shipping weight	3 kg
	Dimension	230118153 mm
I/O Feature	Rated current	9A at 380V ~ 480V, 13A at 220V ~ 240V
	Input voltage	3 phase 230V /400V /480V AC ±15% (Optional)
	Input frequency	50Hz/ 60Hz
	Output voltage	3 phase AC 0~input voltage
	Output frequency	0~1000Hz
	Over load capacity	150% of rated current for 1 minute, 180% of rated current for 3 seconds
Control Feature	Control mode	V/F control; Sensorless vector control;
	Communication	RS485
	Speed regulation	1:100
	Start torque	150% of rating torque at 1 Hz
	Speed control accuracy	≤±0.5% of rating synchronous speed
	Frequency precision	Digital setting: max frequency x± 0.01%; Analog setting: max frequency x± 0.2%
	Frequency resolution	Analog setting: 0.1% of max frequency; Digital setting: 0.01Hz
	Torque boost	Automatic torque boost, manual torque boost 0.1%~30.0%
	Interior PID controller	Be convenient to make closed-loop system
	Automatic energy save running	Optimize V/F curve automatically based on the load to realize power save running
	Automatic voltage regulation (AVR)	Can keep constant output voltage when power source voltage varies.
	Automatic current limiting	Limit running current automatically to avoid frequent over-current which will cause trip
Environment	Enclosure rating	IP 20
	Temperature	–10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5%
	Humidity	5%-95%, without condensation
	Altitude	≤1000m; VFD will be derated if above 1000m
	Impingement and oscillation	Normal running: 5.9m/s2 (0.6g); Transportation: 15m/s2 (1.5g)
	Store environment	–20℃~ +60℃; no dust, no corrosive gas, no direct sunlight

FAQ

What is a 3 phase inverter working principle?

Input power processing: The three-phase inverter first receives the three-phase AC power as input. Then, the input AC power is converted to DC power (DC) through the internal rectifier. The rectifier is usually implemented using a diode bridge to limit the AC sine wave to a single-direction DC waveform.
DC intermediate circuit: The converted DC power enters the DC intermediate circuit, also known as the DC link. This circuit plays the role of smoothing the DC voltage and filtering out the AC component to keep the DC voltage stable. The DC intermediate circuit may also contain filter capacitors or inductors to further smooth the DC voltage and reduce pulsation.
Inversion process: Next, the DC power is converted into AC power (AC) through the inverter. The inverter is the core part of controlling frequency and voltage, which is usually implemented by SPWM (sinusoidal pulse width modulation) or other modulation techniques. The inverter consists of multiple switching devices (such as IGBTs or MOSFETs). By controlling the on and off time and sequence of the switching devices, the AC power of the required frequency and voltage can be generated.
Output power control: The generated AC power is further smoothed and filtered by the output filter to reduce the harmonic components of the output voltage and current. Then, this AC power is provided to the three-phase motor as the driving power. By controlling the switching state and frequency of the solar inverter, the speed regulation, forward and reverse rotation, start and stop of the motor can be achieved.

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Existing reviews

Good value VFD for basic industrial use.

I installed this 3.7 kW inverter on a 3-phase motor in our shop, and it’s been running smoothly. The V/F and vector control modes give me flexibility depending on my setup. It’s rugged enough for daily use, though the IP20 rating means you’ll want to keep it in a cleaner, indoor space.

From: Aubrey Jim | Date: 6/25/2025 3:06 AM

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Decent VFD, but setup takes some effort

This 3.7kW frequency inverter gets the job done with solid motor speed control and smooth operation. However, the setup instructions could be clearer—it took me some trial and error to get everything configured properly.

From: Murray Malan | Date: 2/6/2025 12:37 AM

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Excellent 3.7kw vfd inverter for precise motor control

The 3.7kW three-phase frequency inverter has been an outstanding addition to my industrial setup. Its ability to handle multiple voltages makes it incredibly versatile. The current vector control and V/F control modes are particularly impressive, allowing for precise and efficient 3-phase motor speed control. Overall, it's a reliable and efficient solution for anyone needing robust motor control.

From: Winfred Clara | Date: 7/29/2024 12:31 AM

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Setting of frequency inverter

We are setting up the frequency inverter, but are a big confused.
We need it to start at 5Hz, it should be P020 but when we set that to 5, the frequency inverter starts at 0 and runs to 5Hz?
We set it to 60 and it starts from 0 and accelerate till 60.

From: Leif Leif | Date: 10/9/2021 1:39 AM

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Responded by inverter.com

Please set P2.01=5, and test again.

3.7 kW Frequency Inverter, 3 Phase 220V, 380V, 480V

Feature

Details

Multiple Function Keyboard

Electronic Screen

Rugged Casing

Applications

Car Manufacturer

Ship Operation

Energy Generation

Building Construction

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