(0) Shopping cart
You have no items in your shopping cart.
Shopping Categories

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

    5 out of 5 based on 4 reviews | Write a review
    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.
    SKU: GK3000-4T0055G
    30-day Returns
    Free Shipping
    Delivery date: 2-3 days

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


    Basics Model GK3000-4T0055G/ GK3000-2T0055G
    Capacity 7.5 hp (5.5 kW)
    Shipping weight 5 kg
    Dimension 272*172*182 mm
    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

    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:

    1. 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.
    2. 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.
    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
    Was this review helpful? Yes No (0/0)
    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  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
    Was this review helpful? Yes No (0/0)
    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:
    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
    Was this review helpful? Yes No (0/0)
    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.
    Load more reviews...
    Write your review for 7.5 hp (5.5 kW) VFD, 3 Phase 208V, 380V, 480V
    • Only registered users can write reviews
    • Bad
    • Excellent
    Customers who bought this item also bought

    10 hp (7.5 kW) VFD, Three Phase 220V, 440V, 480V

    SKU: GK3000-4T0075G
    Affordable 10 hp (7.5 kW) VFD, three phase 220V/440V/480V input for option, three phase output variable frequency drive, 17 amps, V/F & vector control, manufacturer direct sale.

    Pressure Sensor for Air/Water/Oil, 4-20mA/0-5V/RS485 Output

    SKU: ATO-PRES-P300
    This series of pressure sensors use a high-performance silicon piezoresistive pressure core as core element. The internal ASICs convert the mV signal into a standard current (4-20mA/0-20mA), voltage (0-5V/1-5V/0-10V) or RS485 signal. Pressure sensor with stainless steel sealing structure has small size, light weight, high anti-vibration and anti-shock performance, measuring range -0.1~100MPa/ -1~1000bar/ -14~14503psi, medium temperature -40~+60℃ (-40~+140℉), for air/water/oil pressure measurement.

    40 hp (30 kW) VFD, 3 Phase 230V, 420V, 480V

    SKU: GK3000-4T0300G
    High quality 40 hp (30 kW) VFD with low cost, three phase 230V, 420V, 480V variable frequency drive with good performance, brand new direct sale by manufacturer.

    5 hp (3.7 kW) VFD, 3 Phase 230V, 400V, 480V

    SKU: GK3000-4T0037G
    Favorable price 5 hp (3.7 / 4 kW) VFD, three phase 230V, 400V, 480V, high performance vector variable frequency drive, IP20 enclosure, RS485 enabled, brand new direct sale by manufacturer.