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    Phase Converter

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    4 hp Single Phase to 3 Phase Converter

    SKU: ATO-PHC-04
    Inexpensive 4 hp power converter, 3 kW, single phase to 3 phase, input & output frequency 50 Hz or 60 Hz, input 110V/ 220V/ 380V/ 415V/ 480V AC to output 220V/ 380V/ 440V/ 480V AC voltage can be customized, manufacturer direct sale.

    5 hp Single Phase to 3 Phase Converter

    SKU: ATO-PHC-05
    Affordable 5 hp power converter, 1 phase to three phase, with 4 kW input voltage is 120V/ 220V/ 380V/ 415V/ 480V AC, output voltage is 380V/ 400V/ 415V/ 480V AC, many voltages can be chosen, factory direct sale.

    7.5 hp Single Phase to 3 Phase Converter

    SKU: ATO-PHC-7d5
    Safety 120V/ 220V/ 380V/ 415V/ 480V AC single phase to 220V/ 380V/ 415V/ 480V AC 3 phase power converter, many voltage can customization, 6 kW power, long life and high efficiency, brand new direct sale by factory.

    15 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-015
    15 hp single phase to three phase converter for sale, 15 hp static phase converter output frequency 50Hz or 60Hz, with LCD, LED display. The input voltage can choose 110V, 120V, 230V, 440v or 480V, ouput voltage can select 220V, 400V, 440V and 480V.

    25 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-025
    220V single phase to 480V three phase converter, output freqency 50/60Hz. Static phase converter input voltage can choose 110V, 120V, 220V or 480V, and output voltage can select 220V, 380V, 440V or 480V, LCD display.

    30 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-030
    240V single phase to 415V three phase converter, 30 hp (25 kW), 1 to 3 phase converter frequncy 50Hz/60Hz, input voltage 110V//120V220V/240V/480V is optional, output voltage 220V/280V/400V/440V is available, with LCD display. Other phases and voltages can be customized, directly sold by the manufacturer, cost-effective.

    40 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-040
    220 volt single phase to 3 phase converter for sale, 40 hp (30 kW), input/output frequency 50Hz or 60Hz. Static phase converter input voltage, output voltage, frequency and phase can be customized. Three phase converter has a long service life, self-protection function.

    50 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-050
    Digital LCD display phase converter single from to 3 phase static phase converter, 50 hp (40 kW), 50Hz or 60Hz frequency is available, 220V/240V/415V/440V/480V 1 phase to 380V/400V/415V/440V/480V 3 phase, low price, high quality and long service life time. Widely used in lathes, milling machines, grinders, drills, sawing machines, metalworking and woodworking equipment and printing presses.

    65 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-065
    65 HP 220V single phase to 3 phase converter for sale, 50kW, with digital LCD display, input voltage 110V/220V/480V is optional, output voltage can choose 220V/380V/480V, single phase to three phase converter other voltages can be customized.

    80 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-80
    1 Phase to 3 phase converter for sale, 80 hp (60 kW) static phase converter convert from 220 volt single to 3 phase, with LCD, LED display, output frequency 50Hz/60Hz.

    100 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-100
    Cheap 100 HP single phase to three phase converter, convert 220V/240V single phase to 380V/415V/480V single phase converter, rated current 193A, output AC power supply is suitable for all types of appliances, power tools, motors, etc. Other voltages can be customized, manufacturer direct sales.

    135 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-135
    240V single phase to 415V/480V three phase converter for sale, 135 hp, 100 kW, input voltage 110V/220V/480V is available, output voltage can choose 220V/380V/480V. LCD display, input voltage, output voltage can be customized.

    20 hp Single Phase to Three Phase Converter

    SKU: ATO-PHC-020
    Single phase to three phase converter for sale, 20 hp static phase converter, Input voltage 110V, 220V, 230V, 415V and 450V are available, output voltage 220V, 380V, 440V and 480V can be selected, 50/60Hz, LCD and LED display, with the advantages of simple maintenance and long life time.

    Single phase to three phase converter prices as listed on the website. 220V single phase to 3 phase converter for sale, ATO provide 5 hp, 7.5 hp, 10 hp, 15 hp, 20 hp, 40 hp, 65 hp, 80 hp to 135 hp phase converter, input voltage can choose 110V, 120V, 220V, 230V, 240V, 415V, 440V, 480, output voltage 220V, 380V, 400V, 415V, 440V or 480V, frequency 50Hz or 60Hz, other input voltage and output voltage can be customized.

    How does a single phase to three phase converter work?

    Single phase to three phase converter have two components, a voltage-sensitive relay and a standard capacitor connected to the motor application. The capacitor will delay the waveform during the start-up of the motor application. The relay will disconnect this start capacitor after the motor has started, and from this point, the motor will continue turning on the single-phase supply. Motors that operate on a static phase converter will produce about 50-60 percent of the nameplate power, so the motor performance is poor while using a static phase converter. The power can be increased by adding another run capacitor to this design. The start-up capacitor is used only to start the motor and then it is switched out completely. While the run capacitor is always in the circuit and it balances the voltages at one load rating.

    4 Tips for buying a phase converter

    1. Make sure you have enough single phase power.

      Here’s how to calculate how much single phase power you need: Take the amount of three phase amps of your load x 1.6 = amount of single phase amps. Then, take the amount of single phase amps x 1.2 = required single phase amps with 20% adder. The 20% adder is factored in as a cushion simply because most towns and cities require you have 20% above what your load is.

    2. Understand your load.

      Is it light, medium, or heavy? To give you an idea, a light load would be something like a drill press or table saw. A medium load would machines similar to CNC machines. A heavy load would be things like HVAC, air compressors, and refrigeration.

    3. The size of your load.

      Know the horsepower, amps, and kilowatts. Knowing this will help you find the best phase converter for you. As a rule of thumb, you want to go 2:1 (2 times the size of your load) to find the size phase converter you need.

    4. Indoor or Outdoor?

      Make sure you buy a phase converter that will stay protected in the environment it will be in. For example, if you do welding you will want to make sure your converter stays protected from metal shavings. Likewise, if you are a woodworker, sawdust. If you are a farmer, you want to make sure your equipment is protected in wind, snow, and rain.

    How to install phase converter?

    ATO phase converters are manufactured to the highest standards and utilize a unique microprocessor based controller to provide quality 3 phase output from your single phase utility supply. Make sure that your phase converter is not installed outside in the weather and is shaded from direct sun, which can increase internal temperature dramatically and lead to component failures or shortened operating life.

    General installation notes on phase converters

    • Always use a licensed and qualified electrician to install your ATO power converter. Do not make any changes while connected to power.
    • While your converter does provide a true 3 phase output, there are a few 'tricks’ that you must understand before you connect your power converter. Therefore it is most important that you read the following installation information BEFORE powering up your equipment.
    • Output of standard converters differs from 3 phase utility in that only the L3 phase is 240V when measured to Neutral or Earth. L1 and L2 are generated by the converter, while L3 is actually connected directly to the incoming supply.
    • Approximate Neutral & Earth to Phase Voltages: L1=160V L2=360V L3=240V
    • Phase converters are primarily designed for 3 phase loads and phase to phase voltages reflect this.

    How to maintenance phase converter?

    ATO converters require general maintenance anywhere from monthly to annually, depending on the model, usage and age of your converter. In all phase converter models, we recommend a quick and easy inspection and tune up. You've purchased your phase converter, properly installed it, and have it efficiently providing power to your equipment. Now what?

    Vents: Ensure that all of the vents of the phase converter are clear from dust or dirt. This will allow air to flow through them without interruption to help keep your phase converter at a reasonable temperature.

    Generator: Clean off any dust, dirt, or debris buildup on the generator. Allowing them to manifest can cause the generator to overheat.

    Power and control components: Inspect the power and control components of your phase converter. If these vital components of your phase converter are not running well or aren't fully functional, contact our team of phase converter specialists. We'll look into the problem and assist you in finding a solution.

    Wires: Check the wires for any loose connections or damage that may have been inflicted. If necessary, you may need to replace any wires with cuts or nicks in them, as this is potentially hazardous to your equipment.

    If you want to learn more about phase converter, please watch the video below:

    Phase converter vs. VFD: which to use?

    Performing a voltage conversion will allow your business to take a single-phase system and convert it into a three-phase system. You can facilitate this conversion in one of two main ways — with a phase converter or with a variable frequency drive (VFD). While both options can help you achieve the same result, they each work differently and have distinct advantages and disadvantages. Let’s take a look at each type to help your business decide which one is best for your applications.

    Phase converter

    Phase converter

    A phase converter facilitates the conversion by adding another leg to the two single-phase lines. It can rely on any of three main control methods:

    • Static phase conversion: Static conversions work best with low-powered motors. With this method, the motor is not running at full efficiency. Instead, it’s mainly running on just two of the legs.
    • Rotary phase conversion: A rotary phase converter works well with large machines that have heavy starting loads. This solution uses two motors and is made from a three-phase electric motor.
    • Digital phase conversion: A digital phase converter provides excellent voltage balance between the phases. A digital signal processor (DSP) is able to produce the third-phase power.


    Phase converters require less wiring, making them easy to install. They can also be used to run multiple machines simultaneously. Other advantages of a phase converter include the generation of three-phase power as well as its ability to operate with resistive and inductive loads.


    A phase converter won’t deliver the same complicated settings that a VFD would or the same control over power distribution and regulation.

    Variable Frequency Drive (VFD)

    Three phase vfd

    A VFD, also referred to as an adjustable-frequency drive, AC drive or variable-speed drive, allows variable speed control when it converts frequency. The VFD controls the torque and AC motor speed of a system. The control of this system takes place on a VFD interface, and it relies on an adjustable-speed drive, which can be a vector drive or sensorless vector.


    VFDs will help your business save energy. They also offer a precise control system with a motor speed controller. Other benefits include experiencing a performance improvement on everything from mixers to pumps.


    While you will get more control, a VFD does not work well for lighter loads or running more than one three-phase machine from one single line. Usually, just one connected machine is run at a time.