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    3 hp VFD, Single Phase 120V Input, 1ph/3ph 220V Output

    5 out of 5 based on 8 reviews | Write a review
    3 hp single phase 120v input, single phase and three phase 220v output variable frequency drive, specially designed for 120v power supply, manufacturer direct sale.
    SKU: GK3000-SP1S1-2d2
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    Delivery date: 2-3 days

    3 hp (2.2 kW) VFD, single phase input & output, single phase to three phase, 110v-120v input, 220v-240v output.


    Basics Model EM15-SP1S1-2d2
    Capacity 3 hp (2.2 kW)
    Shipping weight 3 kg
    Dimension (W x H x D) 120*205*166 mm
    I/O Feature Rated current 10 A
    Input voltage 1 phase 120V AC ±15% (Set FE-00=0)
    Input frequency 50Hz/60Hz
    Output voltage 1 phase or 3 phase 220V AC ±15%
    Output frequency 0~320Hz (SFC)
    Control Feature Control mode V/F control; vector control
    Communication Offer RS485 communication interface, support MODBUS-RTU communication protocol
    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 smaller than 95%RH, non-condensation
    Altitude ≤1000m; VFD will be derated if above 1000m
    Vibration Less than 5.9 m/s2 (0.6 g)
    Cooling forced air cooling
    Store environment –20℃~ +60℃; no dust, no corrosive gas, no direct sunlight

    Tips: Running a 3-phase motor from single phase supply

    If you want to connect a 3-phase motor to a single phase power supply, then you have several solutions:

    • Professional: use a VFD with single phase input and convert to 3-phase output, this is generally available for low power VFD (few horsepower).
    • Professional: apply a specially wound transformer that also mimic a 3-phase system from a single phase power supply. Expect difficulties to source and high price.
    • DIY: calculate a capacitor that will be connected between the remaining phases, such to apply it a phase shift and to mimic a 3-phase system.


    How to run a three phase or single phase motor with ATO VFD on 120V power supply. Take a 2 hp, single phase 120V input, single phase or three phase 220V output variable frequency drive as an example. It shows you how to wire, set parameters, commissioning VFD, run motors, etc.

    A three-phase motor can be regulated using a single-phase 120V to three-phase 220V VFD, and control can be managed through terminals, as demonstrated in the following video.

    In the video, it's demonstrated that ATO VFD offers multiple methods to adjust the frequency: Not only can you use the knob on the panel, but you can also utilize the buttons for adjustments.

    Existing reviews of 3 hp VFD, Single Phase 120V Input, 1ph/3ph 220V Output
    I want to know that...
    I was able to connect VFD to my controller successfully though is it possible to signal back to my controller if there is an error.

    Also I’d like to add a breaking resistor to it though I couldn’t find anything in the manual about that.

    How do I determine the resistance that I need for the breaking resistor?
    From: Cyril | Date: 08/01/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The braking resistor used in this VFD model EM15-SP1S1-2d2 is 100w/70Ω.

    The braking resistor is connected to the P+/PB terminal.
    get error code
    I get error code 40 now I went through all the setting and made sure they were right.  Now I get a error 0040 .
    From: Dylan | Date: 07/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    VFD displays error code 40, which means The load is too heavy or locked- rotor occurs on the motor. Also, The frequency inverter model is of too small power class. If the VFD can run normally after removing the motor, it means that your motor load is too heavy and the VFD is overloaded. We recommend that you replace it with a VFD with a 5HP capacity.
    getting an error
    Hi,  I keep getting an error code 02 now when I start the motor.  Can you get any ideas how to fix this?
    From: Mason | Date: 06/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Please follow the steps below to troubleshoot and provide us with feedback:
    1. Since your motor has dual voltage 230V/460V, please confirm that your motor wiring is based on low voltage 230V.
    2. Please check whether the VFD input voltage is 120VAC?
    3. Please tell us what parameters are set in the VFD, especially whether the parameters F1-01~F1-04 are set according to the motor nameplate?
    4. Please confirm that the VFD and motor are connected correctly and set the correct parameters, then run the VFD again and provide us with a start-up video for confirmation
    Please give me more details of VFD
    We currently have your drives installed with the motors in the attached picture. We were informed by you yesterday that these are the incorrect drives.
    We are going to replace them with the drives you recommended (model EM15-SP1S1-2d2). Before we install these new drives, we would like for you to give us detailed step-by-step programming instructions.
    We need this detailed info prior. Is this something you can help with?
    From: faye | Date: 20/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    You can refer to our setup instructions first, and if you have other questions after receiving the goods, please contact us.
    Is it safe to do so?
    So I wired my AC Variable frequency drive to my single phase 220V motor,  on first start up it ran fine for about 3 or 4 min, and then the starting capacitor got hot and started to smoke, and a small mount of the oil came out of the capacitor. I believe what happened is the switch never engaged so I stayed on the start up windings. So it will run if I give it a little help getting it to spin, but that capacitor gets really hot. The centrifugal switch will not ingage until it is at about 75% rpms. And I am trying to run the motor at much slower speeds. Is it possible to bypass the centrifugal switch and the bad capacitor possibly? Is it safe to do so?
    From: Diggy | Date: 01/03/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    This is a problem with the characteristics of the single-phase motor itself, so we do not recommend that the single-phase motor run for a long time at low frequency and low speed, otherwise the motor capacitor will heat up. Because the starting capacitor of the single-phase motor is only used to assist the motor to start. If the motor runs at low speed for a long time and the centrifugal switch is not disengaged, it will cause heat damage to the motor. If you want the motor to run at low frequency and low speed, we suggest you use a three-phase motor, or you can try to change the internal winding circuit of your single-phase motor to three-phase wiring and remove the capacitor.
    What's wrong with my 3hp VFD?
    I got a problem with your drive, with a 3 phases motor the output voltage drop to 150 and without load it has 220. What's wrong?
    From: Glack | Date: 25/05/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The problem you mentioned is probably caused by the over load current driven by the motor is huge, and then the input voltage and bus bar voltage to be low. You can try to set F0-10=60, F0-12=60, F0-17=10, F0-18=10, then rerun the VFD and test again. When the VFD is running, you can switch the shift key >>U0-03 & U0-04, to see the voltage and current output from the VFD real-time. If the VFD cannot working properly, you may need to replace a larger capacity VFD.
    3hp VFD output voltage
    I am trying to drive a custom solenoid at variable frequency. Curious to know if the output voltage of GK3000-SP1S1-2d2 is variable.
    From: Pence | Date: 10/06/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    We recommend to use the drive with motors only. And yes, the output voltage is variable.
    3hp VFD question answering
    Do we still need to debate VFDs when used on single phase input power like we did with the older VFDs or have you done something like beefing up the input diodes and caps so they will be able to output the same power as on 3 Ph?
    From: Pilgrim | Date: 05/04/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    For our 1-phase To 3-phase drive, no need to oversize, we care about that in design, just consider 10% margine above rated output current referred at each model seen at our web site.
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