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

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

5 out of 5 based on 13 reviews | Write a review
$6,599.51
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.
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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.

Specification:

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
Note:
-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

Wiring and Testing a Single Cabinet Frequency Converter

Here is a video about the operating steps of the cabinet frequency converter. This video gives a rundown of how to wire and test a 1 single cabinet frequency converter using a multimeter.

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.
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