7.5 hp (5.5 kW) VFD, 3 Phase 208V, 380V, 480V

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$415.08

7.5 hp (5.5 kW) VFD with wholesale price, 3 phase 208V/380V/480V 50Hz/60Hz for option, heavy duty variable frequency drive, 13 amps at 380V ~480V, strong overload capacity, manufacturer direct sale.

Input Voltage (Three Phase) ±15%

SKU: GK3000-4T0055G

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Delivery date: 2-3 days

Overview
User Manual
Related Video

7.5 hp heavy duty variable frequency drive, three phase 50Hz/60Hz 208V /380V /480V ±15%, brand new direct sale by manufacturer.

Specification:

Basics	Model	GK3000-4T0055G/ GK3000-2T0055G
	Capacity	7.5 hp (5.5 kW)
	Shipping weight	5 kg
	Dimension	272172182 mm for GK3000-4T0055G/ 330200200 mm for GK3000-2T0055G
I/O Feature	Rated current	13A at 380V ~ 480V, 25A at 220V ~ 240V
	Input voltage	3 phase 208V /380V /480V AC ±15% (Optional)
	Input frequency	50Hz/ 60Hz
	Output voltage	3 phase AC 0~input voltage
	Output frequency	0Hz~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

Note: ATO VFD Cannot be used as a power source, it Can only be directly connected to an induction motor to control the motor speed.

Tips: Variable frequency drive fault static test method
For a faulty VFD, power off the device and test its rectification and inversion part, in most cases the fault can be found this way. Pay attention that VFD cannot be measured immediately after power off, because there are large capacitors store with hundreds of volts of high voltage. The testing only can be launched more than ten minutes later. In order ensure personal safety, the operator must ensure that the machine is off, and the power input lines R/S/T and output lines U/V/W are removed.
Static test method
First turn the multimeter to "diode", and then use the multimeter's red and black pens to detect according to the following steps:

Use black pen to touch the DC bus P (+), and the red pen touch R/S/T in turn, record the displayed values; and then the red pen touch N (-), black pen touch R/S/T, record the displayed values. If the six displayed values are balance, then the VFD diode rectifier or soft start resistance have no problem, otherwise the rectifier module or soft start resistance from the corresponding position is damaged.
Use red pen touch the DC bus P (+), and the black pen touch U/V/W in turn, record the displayed values; and then the black pen touch N (-), red pen touch U/V/W, record the displayed values. If the six displayed values are balance, then the IGBT inverter module has no problem, otherwise the IGBT inverter module of the corresponding location is damaged.

PDF:

GK3000 Series VFD User Manual

Quick Setup Manual & Application

VFD Troubleshooting Guide

How to Measure Circuits with a Digital Multimeter?

This video will show you how to measure electrical circuit using a digital multimeter.

VFD Two-Wire Control Wiring with Push Button for Forward Motor

In this video we've guided you through how to do VFD control wiring with a self-lock push button switch to run the motor in forward direction. We've covered everything from wiring to programming and even a test run. So just watch it through and hope you'll find it informative and helpful.

4-20mA speed Control on VFD

4-20mA is as common in analog control systems as 0~10V, and ATO GK3000 series VFDs are also perfectly compatible.

How to Control VFD with 0-10V (CI port)

This is port CI usage method for 0~10V to control the frequency of ATO GK3000 upgrade version. It is suitable for 1-phase, 1-phase to 3-phase, and 3-phase VFD.

VFD Analog Input 0-10V Frequency Control (VI Port)

ATO GK3000 VFD uses external voltage analog to control the frequency so as to achieve the purpose of motor speed regulation.

Control VFD with Potentiometer & Button (VI Port)

ATO GK3000 vector VFD supports control of synchronous motors, and supports external potentiometer and button control.

Forward and Reverse VFD Button Control

This video is for ATO GK3000 upgrade version VFD 1-phase to 3-phase & 3-phase VFD (3-wire control/external terminal control mode).

Existing reviews of 7.5 hp (5.5 kW) VFD, 3 Phase 208V, 380V, 480V

Remote function

Could you please tell me if this VFD has remote function? If so, which two terminals on the circuit board should I connect?

From: Katie | Date: 31/03/2025