55 kW Frequency Inverter, 3 Phase 240V, 380V, 480V

$2,591.20

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55 kW 3 phase inverter 240V, 380V, 480V with high frequency resolution, analog setting: 0.1% of max frequency; digital setting: 0.01Hz. Come with V/F control and sensorless vector control, a 75 hp high frequency inverter has IP 20 and works at (–10℃, 40℃). Humidity 5%-95%, without condensation. It is usually applied for motor drives, robotics, solar power systems, wind turbines

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Delivery date: 3-10 days

SKU: GK3000-4T0550G

Input Voltage (Three Phase) ±15% *

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Overview
Specs
FAQ
Reviews

Overview

55 kW (75 hp) 3 phase inverter, rated current 110A at 380V ~ 480V, 210A at 220V ~ 240V, 3 phase AC 0~input voltage. Sturdy case, easy to operate and take. It is widely used in automobile manufacturing, new energy development, construction, etc.

Feature

55 kW (75 hp) three phase inverter with RS485 communication and IP 20 enslosure protection. The 3 phase inverter has a built-in PID controller and a convenient shutoff system, and can be operated at (-10℃, 40℃).
The frequency inverter with input frequency 50Hz/60Hz has high frequency resolution, simulation setting: 0.1% of maximum frequency; numerical setting: 0.01Hz.
Equipped with an LED indicator screen, 3 phase motor inverter can display frequency, output voltage, and output current.
The three-phase inverter is made of solid material to protect the internal parts. The variable frequency inverter is easy to install and operate.

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	GK3000-4T0550G/ GK3000-2T0550G
	Capacity	55 kW (75 hp)
	Shipping weight	40 kg
	Dimension	560320269 mm
I/O Feature	Rated current	110A at 380V ~ 480V, 210A at 220V ~ 240V
	Input voltage	3 phase 230V /440V /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 are the modes in a 3-phase inverter?

A 3-phase inverter typically operates in several modes to control the output voltage and frequency for various applications. The main modes include:

Six-step mode: In this mode, the variable frequency inverter produces a quasi-square wave output by switching each phase through six distinct steps per cycle. Each switch remains on for 120 degrees of the electrical cycle, resulting in a waveform that approximates a sine wave. This mode is simple but can introduce harmonic distortion.
Pulse width modulation (PWM) mode: Sinusoidal PWM (SPWM): This is the most common mode where the inverter uses a high-frequency carrier wave modulated by a low-frequency sine wave to generate pulses. The width of these pulses varies to approximate a sine wave, leading to better quality output with reduced harmonics.
Space vector PWM (SVPWM): This advanced PWM technique optimizes the inverter's performance by calculating the vector space of the reference voltage and switching the states to minimize harmonics and maximize efficiency. SVPWM offers better utilization of the DC bus voltage.
Current source inverter (CSI) mode: In this mode, the 3 phase inverter controls the output current rather than the voltage. It is used in applications where the load characteristics demand precise current control, such as in motor drives.
Voltage source inverter (VSI) mode: The frequency inverter controls the output voltage, making it suitable for applications where stable voltage supply is critical. VSI mode is widely used in industrial and commercial applications.
Direct torque control (DTC) mode: This mode is specific to motor control applications. DTC directly controls the motor torque and flux by selecting the appropriate inverter state, allowing for precise and fast dynamic response.
Hysteresis mode: In hysteresis mode, the three phase inverter switches are controlled based on the error between the reference signal and the actual output. When the error exceeds a certain threshold, the switches change state to correct the error, providing robust control.

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Reliable performance for heavy-duty industrial applications

Our plant installed this 55 kW frequency inverter on a production line to control several large motors. The speed control is precise and smooth, which has helped improve both efficiency and product quality. The setup was straightforward, and the inverter has been running continuously in our factory environment without any overheating or stability issues.

From: Woodrow Edie | Date: 6/22/2026 12:46 AM

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Cheap 55kW frequency inverter

I used this 55kW frequency inverter to change the speed of the motor. The item works perfectly. It's also very fairly priced compared to some other frequency inverter.

From: Mandykat Mandykat | Date: 8/25/2021 7:15 PM