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

5 out of 5 based on 4 reviews | Write a review

$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

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

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

VFD video has been sent

Video was sent at 6:25 pm mountain time on wetransfer.

From: paddy | Date: 15/06/2023

Was this review helpful? Yes No (0/0)

ATO Responded

Thanks for your feedback.
We reviewed the video you gave us feedback.
We noticed that your three-phase 240V voltage is unbalanced, one of the phases has a high voltage, and the highest voltage reaches 263V. We suggest that you remove the high phase C and use single-phase 240V voltage input to VFD instead. Our VFD can also receive single-phase 240V voltage, but the difference is that the current at the input terminal will increase, which is about 1.5 times the current at the output terminal.
Regarding the reverse rotation of the motor, you need to set P3.46=031 (the ones digit is 1), and P0.04=00 (reverse rotation is allowed).
Hope my explanation is able to assist you.
Please feel free to let us know if you have any further questions.

The panel providing power to the 7.5 hp VFD

The panel providing power to the VFD is fed by an American rotary phase converter. In normal operation, the power is A phase 120 to ground, B phase 120 to ground, C phase 240 to ground. A to B 240, B to C 240, A to C 240.

From: niki | Date: 06/06/2023

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ATO Responded

Sorry for the late response.
So you are saying that although the three-phase 240V power output from the American rotary phase converter, C is relatively high, the three-phase voltages A, B, and C at the output end are all 240V, right?
If so, you can only connect the three-phase 240V power supply, first start the VFD with no load and then check whether the VFD can start up to 60HZ normally. Then use a multimeter to continuously measure the voltage at the VFD input terminal to see if there is any change or fluctuation.
It would be better if you could provide us with a video for confirmation, the video should include the continuous measurement of the voltage at the VFD input terminal, and the running status displayed on the LCD panel.
You can send us the large video file via wetransfer.com. Thank you for your understanding.

7.5 hp VFD questions and answers

Hello, I live in French polynesia. Here we have 220 v (60hz) between 1 phase and 1 neutral: L N. As I see in the manual, your 1 phase 220v is between 2 phases: L1 L2. Do you have some VFD available for 1phase 1 neutral 220v input? My goal is to buy a 3 phases 220v air compressor (5 hp) in the USA, so I need a VFD TO CONVERT my 220v (1 phase 1 neutral) to a 3 phases 220v and for soft start too.
Maybe a 7.5HP VFD will be better for my 5 hp air compressor.
Thank you for your help.

From: Sadie | Date: 08/09/2021

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ATO Responded

1. Our 1-phase to 3-phase drive will cover your needs, as its input is 1-phase + 1 neutral 220V basically, and it works for 2-phase input (L1+L2, G) as well.
2. Yes, if your 3-phase, 220/230V motor rated current is less than 19A, then you can use our 7.5hp 1-phase to 3-phase drive. >> Model: GK3000-2S0055G
See specs, price, and you can order online by credit card at: https://www.ato.com/7-5hp-single-phase-to-three-phase-vfd

Fast receipt of 7.5 hp VFD

I will be visiting a friend in Chicago from April 5th to 10th. Will I be able to receive this 7.5hp VFD next week?

From: Hubert | Date: 21/04/2021

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ATO Responded

Yes, we can. Just place an order online via a credit card and then confirm it again, which can save a lot of time.

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