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

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?

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.

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?

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?

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" (http://www.gohz.com/20kva-frequency-converter).
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.

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?

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.

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?

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?

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).

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.

What will happen to the 20kva frequency converter if it got sudden high inrush/surge current?