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    1/2 hp (0.4 kW) VFD, Single Phase Input & Output

    4.8 out of 5 based on 17 reviews | Write a review
    Inexpensive 1/2 hp VFD, 1 phase for single phase AC motor speed controls, 220V - 240V 4 amps, manufacturer direct sale.
    SKU: GK3000-1S0004
    Availability: In stock
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    Delivery date: 2-3 days

    1/2 hp variable frequency drive, 0.4 kW, 1 phase 220V - 240V for single phase AC motor, manufacturer direct sale.


    Basics Model GK3000-1S0004
    Capacity 1/2 hp (0.4 kW)
    Shipping weight 2 kg
    Dimension 142*85*110 mm
    I/O Feature Rated current 4 A
    Input voltage single phase AC 220V±15%
    Input frequency 47~63Hz
    Output voltage 0~rated input voltage
    Output frequency 0~1000Hz
    Over load capacity 150% of rated current for 60s, 180% of rated current for 10s, 200% of rated current for 3s
    Control Features Control mode V/F, Sensorless vector control (SVC), Speed sensor vector control (FVC)
    Operation command mode Keypad control, Terminal control, Serial communication control
    Frequency setting mode Digital setting, analog setting, pulse frequency setting, serial communication setting, multi-step speed setting & simple PLC, PID setting, etc. These frequency settings can be combined & switched in various modes.
    Start frequency 0.40Hz~20.00Hz
    Speed adjustment range 1:50
    Carrier frequency 1.0-16.0kHz, automatically adjusted according to temperature and load characteristics
    Frequency accuracy Digital setting: 0.01Hz
    Analog setting: Maximum frequency * 0.05%
    Torque boost Automatically torque boost; manually torque boost: 0.1%~30.0%
    V/f curve Three types: linear, multiple point and square type (1.2 power, 1.4 power, 1.6 power, 1.8 power, square)
    Acceleration/deceleration mode Straight line/S curve; four kinds of acceleration/deceleration time, range: 0.1s~3600.0s
    DC braking DC braking when starting and stopping
    DC braking frequency: 0.0Hz~maximum frequency, braking time: 0.0s~100.0s
    Jog operation Jog operation frequency: 0.0Hz~maximum frequency
    Jog acceleration/deceleration time: 0.1s~3600.0s
    Simple PLC & multi-step speed operation It can realize a maximum of 16 segments speed running via the built-in PLC or control terminal.
    Built-in PID Built-in PID control to easily realize the close loop control of the process parameters (such as pressure, temperature, flow, etc.)
    Automatic voltage regulation Keep output voltage constant automatically when input voltage fluctuating
    Control Function Common DC bus Common DC bus for several VFDs, energy balanced automatically
    Torque control Torque control without PG
    Torque limit "Rooter" characteristics, limit the torque automatically and prevent frequent over-current tripping during the running process
    Wobble frequency control Multiple triangular-wave frequency control, special for textile
    Timing/length/counting control Timing/length/counting control function
    Over-voltage & over-current stall control Limit current & voltage automatically during the running process, prevent frequent over-current & over-voltage tripping
    Fault protection function Up to 30 fault protections including over-current, over-voltage, under-voltage, overheating, default phase, overload, shortcut, etc., can record the detailed running status during failure & has fault automatic reset function
    Input/output terminals Input terminals Programmable DI: 7 on-off inputs, 1 high-speed pulse input 2 programmable AI:
    AI1: 0~10V or 0/4~20mA
    A12: 0~10V or 0/4~20mA
    Output terminals 1 programmable open collector output: 1 analog output (open collector output or high-speed pulse output)
    2 relay output
    2 analog output: 0/4~20mA or 0~10V
    Communication terminals Offer RS485 communication interface, support MODBUS-RTU communication protocol
    Human machine interface LED display Display frequency setting, output frequency, output voltage, output current, etc.
    Multifunction key QUICK/JOG key, can be used as multifunction key
    Environment Ambient temperature -10℃~40℃, derated 4% when the temperature rise by every 1℃ (40℃~50℃).
    Humidity 90%RH or less (non-condensing)
    Altitude ≤1000M: Output rated power, >1000M: Output derated
    Storage temperature -20℃~60℃

    Note: The single phase motor should Not be adjusted to run based on a lower frequency than 80% of its rated frequency for along time, otherwise the motor may fail.



    400W Single Phase VFD Details
    Tips: 7 points about variable frequency drive application environment
    The variable frequency drive may not be normally operated in any cases, so the user is necessary to have more understanding about load, environmental requirements and the VFD itself. There are seven points should be pay attention to:

    1. Because the motor temperature will be high under long-term and low-speed operation, the fan cooling capacity will also reduce, so it must use high reduction ratio VFD or 6 grade motor to let the motor running in higher frequency.
    2. The variable frequency drive installation site must require the standard environment, or it will easily cause failure or shorten the service life. The distance between VFD and driving motor should not be more than 50 meters, for longer distances need to reduce the carrier frequency or increase output reactor option to function properly.
    3. Type of load and VFD selection: Different load of motor has different requirements of VFD.
    4. Fan and pump is the most common load: They have the simplest requirements of the variable frequency drive, as long as the variable frequency drive capacity is equal to the motor capacity (air compressor, deep water pump, sediment pump, and fast changing music fountain need higher capacity).
    5. Crane load: This type of load is characterized by a great impact on the starting, so it requires a margin of the VFD. At the same time, there will be energy feedback when putting down the weight, so it requires brake unit or share bus.
    6. Uneven load: Some load maybe sometimes light and sometimes heavy, this time should be in accordance with the heavy load situation to select the variable frequency drive capacity, such as rolling machinery, crushing machinery, mixer, etc.
    7. High inertia load: Such as centrifuges, punching presses, cement rotary kiln, these kinds of load have high inertia with large oscillation when starting, and the motor may have deceleration energy recovery. So we should use higher capacity VFD to speed up the starting to avoid oscillation. And we can use the brake unit to eliminate the feedback power.

    Running a single phase motor with VFD

    In this video, ATO will show you details about running a single phase motor on a VFD. It's important to note that there are two wiring methods for single phase motor connecting to ATO single phase VFD: wiring of removing motor capacitor & wiring of keeping motor capacitor. At first, you should choose the wiring method you needed, and then set basic parameters step by step.

    Existing reviews of 1/2 hp (0.4 kW) VFD, Single Phase Input & Output
    Can you help me navigate the warranty situation?
    We purchased the 75 hp (55 kW) VFD, 3 Phase 230V, 440V, 480VVFD. Yesterday it quit working. It had been working well prior to this. Can you help me navigate the warranty situation?
    From: Carter | Date: 27/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The warranty period of the VFD you purchased is 18 months, and it is still within the warranty period. Please do not worry, could you please tell us what the fault code displayed by the VFD is? Can you remove the motor's wiring and run the VFD alone to check if it displays and operates normally? If Not, you can set P3.01=10 (restore factory parameters), and test again.
    how to fix it?
    I haven't received an answer after I uploaded the data needed to identify my VFD, and now it won't start any kind of programm. When I wire and plug it in, it directly says "E-003", not allowing me to change any parameter. I hope I can receive a response, or maybe instructions to make the warranty valid.
    From: alfor | Date: 07/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    E03 fault is overcurrent protection.
    Please follow the troubleshooting steps below to check:
    1. The VFD is not connected to the motor, and the VFD is connected to the power supply. Check whether the VFD can display normally and operate normally when it is No-load?
    2. Please send us the nameplate pictures of the VFD & motor to confirm if they match?
    3. If step 1 proves that the VFD can operate normally without load, please connect the motor again, refer to the attached document, reset the VFD parameters, pay attention to setting the acceleration and deceleration time to P0.12=P0.13=10s, and test again.
    If still If you have any questions, please provide a video for us to confirm.  It is important for us to figure out a solution. Thank you for your understanding.
    how to fix it
    2 months ago I bought and VFD to use with a single phase motor. The VFD worked perfectly during the first week, however I had a problem when connecting to an oscilloscope and theres now an error called "P01" and "P03". I don't know how to fix it so it can operate again.
    From: jacob | Date: 06/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Since our VFD has an update, this is why we ask you to send a picture of the VFD nameplate label. Please send the VFD nameplate label picture to us again for confirmation.
    If your VFD serial number has the word 9000 in front of it, then to restore the VFD to factory settings, please set Pd.01=1.
    After completion, you can refer to the attached quick setup document to reset the VFD parameters, and test again.
    Quite good
    The VFD worked perfectly during the first week, however I had a problem when connecting to an oscilloscope and theres now an error called "P01" and "P03". I don't know how to fix it so it can operate again.
    From: Jorge | Date: 02/10/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Please send a photo of your VFD nameplate to (to identify your VFD version) and describe your problem, and our after-sales engineers will solve it for you.
    Where the OC connector is in the VFD?
    I purchased this VFD, and in the user manual, there is an open collector output (OC), but I can't find the OC connector in the VFD. Please kindly advise where the OC connector is in the VFD?
    From: Diggy | Date: 02/08/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Only the 380V version of our VFD is equipped with OC output terminal. What function do you want to use the OC output terminal to achieve?
    Schematics diagrams for VFD
    Hello, can you provide me with the schematics diagrams
    From: patryk | Date: 26/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Sorry for the late response.
    For the schematics diagrams, do you mean the electrical schematics inside the VFD?
    Unfortunately, we do not provide VFD internal circuit diagram.
    If you just want to change parts, just remove the original parts from the board and solder them again.
    The right VFD pressure sensor parameter
    I Installed this VFD GK3000. Cannot get the pressure sensor parameter right. In my unit there is a OULD PT-306 sensor and it is working fine. I connected it to the 24v for positive and CI for negative and a jumper from GND to COM. Like the You Tube video shows.
    I go to you tube and try what they do. I want to start compressor and charge to 170LBS. And shut off and then restart at 150LBS to recharge to 170LBS automatically.
    From: foster | Date: 02/03/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Connect the pressure sensor, please refer to the attachment. If you still can't connect, please provide us with your pressure sensor parameters and information.
    2. How do you control the air compressor with VFD? Please provide the wiring diagram and nameplate diagram of the compressor.
    3. If the VFD needs to set the frequency to 60hz, please set the parameters: P0.02=60, P0.06=60, P0.07=60, P0.19=60, P0.20=60.
    How to increase the speed of the motor?
    I received this item that you recommended for my motor. Can you please send me a simple way to get to the control function so I can access how to increase the speed of the motor. Just a simple procedure as to where to navigate in the menu so I can increase the speed of the motor.
    From: Alston | Date: 28/02/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Please refer to our video and quick setup manual.
    Please feel free to let us know if you have any further questions.
    Do you ship to the EU?
    Thank you for providing the link to the video.
    No, we don’t want to power our linear alternator directly from the grid, then we have no control over the operation of the unit.
    I think your company is located in the USA, do you ship to the EU?
    From: carver | Date: 28/02/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    OK, I see. So you want to use VFD to control this linear alternator.
    But we don't confirm whether our VFD is fully compatible with this type of motor, you can try to buy one for testing.
    At present, we can only ship from the US warehouse, and other places do not support it for the time being.
    Can the output of this SKU: GK3000-1S0004 VFD also do single phase 120V?
    Can the output of this SKU: GK3000-1S0004 VFD also do single phase 120V? I have single phase 120V input and need single phase 120V output.
    From: Alex | Date: 10/03/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Sorry, it can't. This VFD, Single Phase Input&Output can only surport 220v input and output.
    Installation of a 1-phase drive
    What is the advantage of removing motor capacitors when installing your 1-phase drive?
    From: Kurt | Date: 07/02/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    It is okay to remove the capcitors or not, the drive will work effectively. Just removing the capacitor may provide a little bit stability.
    I am interested in your VFD
    Hello, I am interested in more information about the GK3300 series of VFD drives, non-enclosed. Could you provide a manual for this series? I found a manual for the GK3000 series and imagine many things are similar. However, the main thing I wonder is how they are set up since it looks like there is no control readout, buttons or other manual inputs. Is this done with a configuration software maybe? Please let me know what info you can provide regarding this series.
    From: Sommesi | Date: 18/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    If you purchase the frequency converter non-enclosed, it will be equipped with a keyboard to realize input and display the reading function.
    If you need more detailed information to purchase a VFD, please let me know.
    I am attaching you the details requested by you. Ok what is your 1-phase motor rated voltage and current? 230V, 1-Ph, 50Hz, 5 A. Motor wattage: 1100 W. And what is your 1-phase supply voltage?
    230 V, 1 ph supply available. Do let me know if you require any more details.
    From: Dahl | Date: 16/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Ok, recommended VFD model: GK3000-1S0015, 2hp capacity.
    See its specs/price, and you can order online by credit card on:
    High quality 1/2hp VFD
    Could your 1/2 hp (0.4 kW) VFD, single phase input
    From: Calitri | Date: 27/06/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, of course.
    Power of one phase variable frequency drive
    Do we have to derate the one phase variable frequency drive?
    From: Bdeko | Date: 13/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Just 15-20% will be enough.
    Use of 1/2 hp VFD
    Could your 1/2 hp VFDs be supplied in explosion proof panels for offshore working conditions?
    From: Mary | Date: 06/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    No, we engaged in VFDs only, don't provide panels. But you can use simple local enclosure/panel if needed.
    Excellent VFD
    This is my second purchase of the ATO VFD motor controller. Both are installed and performing. Works great and I highly recommend.
    From: Matthias | Date: 18/07/2019
    Was this review helpful? Yes No (0/0)
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