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

    20kVA Single Phase 220v 50Hz to 120v 60Hz Converter

    5 out of 5 based on 13 reviews | Write a review
    Affordable 20 kVA 1 phase frequency converter (AC power supply), changing 220V 50Hz to 120V 60Hz (vice versa), built-in step down/step up insulate transformer, make imported appliances easy to work on different 50/60 Hertz power systems.
    SKU: HZ-50-1120
    30-day Returns
    Delivery date: 6-12 days

    20 kVA pure sine wave frequency converter, changing 230V 50Hz to 110V 60Hz, or 120V 60Hz to 240V 50Hz, voltage and frequency converter for Europe and US home appliances.


    Model HZ-50-1120
    Capacity 20 kVA
    Dimension 680*500*970mm
    Weight 180 kg
    Input Voltage 1 Phase 2 Wire: 110V, 120V, 220V, 230V, 240V ± 10% (Option *)
    Frequency 50 Hz, 60 Hz or 400 Hz ± 5%
    Output Voltage, current 110V Setting (Low grade): 0-150V, 166.4A
    220V Setting 0-300V (High grade): 0-300V, 83.2A
    Load stabilization Rate ≤±1%
    Frequency 50Hz, 60Hz up to 400Hz adjustable
    -When the output is 400Hz, the load capacity can only reach 50% of the rated capacity.
    -When the output is ≤120Hz, the load capacity can reach 100% of the rated value.
    -You can just adjust converter output frequency in the range (40-400Hz) for 400Hz option.
    Frequency Stability ≤±0.01%
    Harmonic Distortion Pure Sine Wave ≤2%
    Frequency meter 4 digit, digital frequency meter, resolution 0.1Hz/Step
    Voltmeter 4 digit, digital voltage meter, resolution 0.1V
    Ammeter 4 digit, digital ammeter, resolution 0.1A
    Watt meter 4 digit, digital Watt meter, resolution 0.1W
    Protection With overload, short circuit, over temperature
    Instantaneous power failure protection and alarm device
    Working Environment Temperature 0 - 40 deg.℃
    Humidity 0 - 90% (Non condensation)
    Warranty 18 months

    Tips: Frequency (50Hz and 60Hz) interchange will affect AC contactor

    The impedance of small-size contactor is very small. Under the premise of ignoring impedance voltage drop, the electromotive force is in direct proportion. When the frequency turns from 50Hz to 60Hz, the induced electromotive force increases to 1.2 times, so the corresponding control voltage shall be increased to 1.2 times. In order to satisfy the suction requirement, it is required to increase the control voltage. Otherwise, insufficient suction will result in the bounce and bad contact of the relay, thus eventually causing damage.

    Existing reviews of 20kVA Single Phase 220v 50Hz to 120v 60Hz Converter
    Start-up current of converter
    Thanks for the additional information.
    Is there a chance that the input start-up current is not always that high?
    I managed to get the converter starting after rewiring the supply cord.
    Anyway, I  think the current situation is ok and we can continue with testing.
    Thank you again for your support, I really appreciated your input.
    From: helah | Date: 24/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The first input start-up current may be relatively higher.
    After the internal capacitor is fully charged and restarted, the starting current may be relatively smaller.
    You can continue to test and give us feedback.
    Please feel free to let us know if you have any further questions.
    How to identify the problem of converter?
    Thank you very much for the fast response time. I did check the input wiring again and afterward measured the line and phase voltage while the input circuit breaker was OFF.

    I measured 407V~ for the line voltage (R-S, R-T, S-T) and 233V~ for the phase voltage (R-N, V-N, T-N), which is what I expected of our grid (swiss grid has 230V 50Hz. Phase voltage). Therefore I am sure the input wiring is correct.

    What I fail to see at the moment is, how replacing the fuse could help me solve the problem of the low resistance connection between R and N when the input circuit breaker is ON. I measure 60ohm between R and N when the input circuit breaker is ON (measured without supply voltage on the converter).

    Therefore when I turn the input circuit breaker ON while having the converter supplied, this leads to the fuse of my external power box being activated.

    I fear that there is a defect in an internal component inside the converter, otherwise, I cannot explain the low resistance connection between R and N. I checked the internal fuse of the converter and it is still fine (0.2ohm). Are there any other checks I could perform to help identify the issue?
    From: greer | Date: 21/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    We are also surprised by this question.
    May I ask what type of fuse you are using for the external power supply?
    What is the capacity of the fuse(A)?
    For a 20KVA converter, we recommend using a 63A circuit breaker at the input.
    Also, we also want to know if the converter is running with no load or connected to a load with the mains fuse activated.
    If it is running with a load, you can try to remove the load.
    First, check whether the converter can start and run normally without load.
    If it is running with no load, try replacing the fuse with a larger capacity (or remove the mains fuse, because there is a circuit breaker at the input of the converter), then connect the load and test again.
    What could the converter have gone wrong?
    Thank you for your help, I managed to make it work by reducing the overall resistance of my circuit.

    Unfortunately, I run into another problem. I changed the input supply cord of the frequency converter. After changing the cord, I wanted to double-check if everything works. I turned the input AC breaker on the frequency convert, and after that, it immediately activated the fuse of my supply.

    I was surprised by this, since everything worked before I changed the cable, and I am sure I connected all phases correctly. Now when I measure the resistance between neutral and phase 1 (Connectors R and N) the resistance only is 60 Ohm.

    Since the resistance between R and N on the supply clamp is >1Mohm when I open the input circuit breaker, the low ohmic connection must be after the input breaker (inside the converter).
    I double-checked if there was a problem with the cable I used, but the resistance of the cable is >1Mohm as well.

    Do you have any idea, what could have gone wrong? If there was a short circuit current, what could possibly break inside the converter?
    If you want any additional information do not hesitate to contact me.
    From: boris | Date: 21/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    If there is a short circuit at the input end, either the input end is connected to the wrong wire (firewire and natural wire N are confused), or there is a problem with the cable.
    You can troubleshoot as follows:

    1. First, please check whether the input terminals R, S, T, and N of the converter corresponding to the three legs of the power supply terminal and the natural line N. You must ensure that the wiring at both ends of the power supply line is correct.

    2. After confirming that the wiring is correct, set the input circuit breaker of the converter to the OFF state, and then turn on the power supply at the input end.
    First use a multimeter to measure whether the line voltage (R-S, R-T, S-T) voltage at the input terminal is normal, and then measure whether the phase voltage (R-N, V-N, T-N) voltage is normal. The purpose of the above operation is to confirm whether the voltage at the input terminal of the converter is normal.

    After completing steps 1-2 and confirming that there is no problem with the input wiring and input voltage, you can replace the backup fuse, then run the converter again with no load and test again.
    Question about single phase converter
    We received the HZ-50-1120.  We want to get 230V 50Hz output.  We have a few questions before we power it up.
    1. Our 235V 60Hz power is from a transformer output with an un-grounded delta configuration. Can we safely apply it to the HZ-50-1120 input?
    2. We also have a 208V system which is grounded wye configuration.  Can we safely apply it to the HZ-50-1120 input?
    3. Can  120V (A to Neutral) be applied to the HZ-50-1120 input?
    4. Is there any large capacitance in the input stage of HZ-50-1120 that can cause a high in-rush current?
    From: brien | Date: 15/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    We checked this converter you bought, the input voltage is single phase 230VAC.
    So we suggest you use the first power supply 235V 60Hz power, and directly connect the 235V voltage (A-B) to the input terminals L, N, and you can introduce the ground wire from other places to connect to the G terminal so that it can be used.
    You can refer to our usage video:
    Single phase converter frequencies of these interference
    No worries, I did not know you guys had a day off because of Labor Day. Anyway, thank you for your feedback.
    I figured that there are some interference. Do you have a recommendation of a suitable EMI / EMC filter?
    Do you have an idea about the frequencies of these interference?
    From: benson | Date: 06/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    In order to reduce electromagnetic interference as much as possible, you can wind a magnetic ring on the ground wire, and add an EMI/EMC filter with the same power capacity at the input/output of the converter, and test again.
    How to improve the quality of the output signal of the converter?
    To whom it may concern, I am working for V-ZUG AG, a siwss company that produces various household appliances.
    We recently purchased a "20 kVA Single Phase Frequency Converter 60Hz to 50Hz" (
    I have finalized the installation of the frequency converter but once I connected my appliance to the converter, I had to realize that my optical communication was not woring anymore. When I power the appliance with our normal power supply (swiss power grid), I have no problems with the communication.
    My current assumption is that the converter generates some kind of disturbance on the output, which disturbs the communication line. The communication board is a very high resistance circuit (10Mohm resistor) and I would think that this circuit somehow picks up some disturbances, or the disturbances are distributed via the appliance internal 5V power supply.
    I have tried different kinds of filters at the output of the converter, but was not very succesfull in getting rid of the disturbances.
    Is this an issue other customers had previously? Are there any possibilities to add some additional filters to the output of the converter?
    I am looking forward to an answer and hopefully some recommendations on how to improve the quality of the output signal of the converter.
    From: rio | Date: 06/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Sorry for the late response.
    The output of our converter has electromagnetic interference, because there are many electronic components inside it, and these electromagnetic interference can not be completely shielded.
    You can try to add an EMI/EMC filter at the output of the converter and then connect it to your communication line electronic equipment, which can reduce part of the disturbance.
    I am looking at a frequency converter
    Hi, I am looking at the 10kVA pure sine wave frequency converter. I will need to converter 120v 60Hz to 230v 50 Hz. We are concerned about the electromagnetic noise of our other device. I wonder if you have short term rental products that we can have a try?
    From: Mazur | Date: 05/01/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Ok, and that is the converter specs:
    Model: HZ-50-1110, 10kVA power capacity, input: 1ph, 120V (+/- 10%), 50/60Hz and output: 1ph (L, N, G), adjustable (0-300V), adjustable (40 -120Hz), 41.6A.
    1. Unfortunately, they do not provide rental service, only selling business.
    2. We think you will not face such electromagnetic noise, because the converter terminals are hard wire "free", you can use long wires to hook up the converter to your installation, so you can place it away from your other devices. And its internally full galvanically isolated, no harmonic distortion (EMI, EMC).
    Can ATO provide the following frequency converter?
    50 kVA customized frequency converter with the input: 3 phase 400 V (L1 L2 L3) 50 HZ.
    Output: 2 Phase 400 V (L1-L2) 60 Hz.
    From: Mifune | Date: 14/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, of course, and here is the specs in where we shall offer for: Frequency converter model: HZ-60-3160, 60kVA capacity, input: 3-phase, Wye (L1,L2,L3 + N,G), 400V (+/- 10%), and output: Split phase, 2 hot line (L1,L2 + N,G), adjustable (0-400V), adjustable (40-120Hz), 150A.
    We need to buy a frequency converter
    We have a project in Bucharest and for this we need to purchase a 1-frequency converter 45kVA with 400Hz, 115/200V output. What do you recommend?
    From: Mandri | Date: 17/10/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Based on your choice, recommended frequency converter model: HZ-50-3345, 45kVA power capacity, input: 3ph, Wye (L1, L2, L3 + N, G), 400V (+/- 10%), 50/60Hz and output: 3ph, Wye/Delta (L1, L2, L3 + N, G), adjustable (0-260V), adjustable (40-499.9Hz), 125A.
    Can your frequency converter work normally with this device?
    Hi, I purchased a product from a different country without having the foresight to look at the frequency of the voltage first. It is a Smola coffee roaster and runs on 220v 50Hz. I have 220v 60Hz US voltage available. Will any of your converters make this appliance work properly?
    From: Paulw | Date: 29/09/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, of course, our frequency converter can do so.
    What is your coffee roaster power capacity and rated current (Amps)?
    Or you can picture its name plate "tag label", and send it to us.
    I hope ATO can give some suggestions for buying frequency converter
    Hope this email finds you well.
    Do you supply it in Saudi Arabia, or do you have a local vendor here?
    I am interested in a 60 to 50Hz frequency converter for 220V.
    We have placed two RCS90 chiller units from TA instruments to support their DSC250. These chiller units are only available at 220 V / 6A / 50 Hz. While here at KAUST in the Kingdom, the only available is 220 V / 60 Hz.
    For this, I am urgently looking for 1 or 2 suitable frequency converters that work at our 60 Hz cycle power. (50 Hz AC a DC a AC 60Hz).
    From: Reston | Date: 12/09/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Do not have local vendors in KSA, but we supply them there, as we are used to shipping KSA (by Air).
    Questions about frequency converter
    I would like to ask you for information whether it would be possible to supply 30 kVA GoHz frequency converter with extended range of output line voltage at least up to 530 V, optimally up to 550 V.
    From: Garden | Date: 18/08/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can. But the converter output current capability will be lower than standard one, and here is the specs based on the standard supply voltage in Slovakia will be: HZ-50-3330, 30kVA power capacity, input: 3ph, Wye ( L1,L2,L3 + N,G), 400V (+/- 10%), 50/60Hz and output: 3ph, Wye/Delta (L1,L2,L3 + N,G), adjustable (0-550V), adjustable (40-120Hz), 31.5A.
    Troubleshooting of 20kVA single phase frequence converter
    What will happen to the 20kva frequency converter if it got sudden high inrush/surge current?
    From: Gilbert | Date: 17/04/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    If the converter got a sudden high inrush current, its internal protection trips, so you just need to reset and run again, not an issue.
    Load more reviews...
    Write your review for 20kVA Single Phase 220v 50Hz to 120v 60Hz Converter
    • Only registered users can write reviews
    • Bad
    • Excellent
    Customers who bought this item also bought

    5kVA Single Phase 110v 60Hz to 220v 50Hz Converter

    SKU: HZ-50-1105
    5 kVA static pure sine wave frequency converter, change 1 phase 110V 60 Hz (e.g. Philippines) to 220V 50 Hz (e.g. China) in one step by built in step up transformer, also convert 230V, 240V 50Hz to 120V 60Hz, adjustable output voltage (0V to 300V) and frequency (40Hz to 400Hz).