75kVA 3-Phase 400v 50Hz/240v 60Hz Frequency Converter

Regarding the installation and wiring of frequency converters, the cables are usually connected from the bottom opening. R/S/T is the input power terminal, N is the natural wire, G is the ground wire, and U/V/W is the output three-phase voltage. You can refer to our operation demonstration video, please see on: https://www.youtube.com/watch?v=MJoK9mAmYhI
And https://www.youtube.com/watch?v=xRDzC1vHtIw

If the phase voltage (U-N, V-N, W-N) is same, and the output line voltage (U-V, V-W, W-U) only has a deviation of about 4-5V. This is normal. You can use this converter normally.
Since the converter you bought is a 2019 version, if you want to control the line voltage accuracy to about 1V, you can only upgrade and replace it with a new motherboard."

We still need you to provide Line voltage (U-V, V-W, W-U) unbalance measurements before confirming parts replacement. Please use a multimeter to measure the three-phase output line voltage (U-V, V-W, W-U) when the converter is running without load, and provide us with a picture of the measurement result for further confirmation.

You need to provide 2 sets of measurement data:
1. Phase voltage measurement value (U-N, V-N, W-N)
2. Line voltage measurement value (U-V, V-W, W-U)
You can send us the large video file via wetransfer.com. It would be better if the feedback is video.

Based on your specs, recommended frequency converter model: HZ-50-1103, 3kVA power capacity, input: 1ph, 230V (+/- 10%), 50/60Hz and output: 1ph (L, N, G), adjustable ( 0-150V), adjustable (40-120Hz), 25A.

Ok, based on your machine specs, recommended frequency converter model: HZ-50-1110, 10kVA power capacity, input: 1ph, 220V (+/- 10%), 50/60Hz and output: 1ph (L, N, G), adjustable (0-300V), adjustable (40-120Hz), 41.6A.

For 16A electronics load, recommended frequency converter model: HZ-50-1105, 5kVA power capacity, input: 1ph, 230V (+/- 10%), 50/60Hz and output: 1ph (L, N, G), adjustable ( 0-150V), adjustable (40-120Hz), 41.6A.

Ok, based on 37.2kVA load, recommended frequency converter model: HZ-50-3145, 45kVA power capacity, input: 3ph, Wye (L1, L2, L3 + N, G), 480V (+/- 10%), 50 /60Hz and output: 1ph, (L + N, G), adjustable (0-300V), adjustable (40-120Hz), 188A.

Thanks for your kind information on transformer load capacity for our reference.
1. For power 2-5 MVA, it is alright to choose a 15KVA converter, but for a nominal power that may be around 15-25 MVA, you need to choose a 75 KVA converter in fact. Because our converter needs to amplify at least 3 times the capacity for transformer load. Choose 15 KVA & 75 KVA converters is the only choice.
2. Q&A on the other questions:
A. Yes, the external filter is an option.
B. If you just need our converter to work as a single-phase output occasionally, you can do it without a selector and without any changes. Because our three-phase converter can be directly connected to an output Hot Line, add zero Line N, then it becomes a single-phase output, it can be used like this.>>>the nominal output power will be 1/3 of nominal power (5-7kVA).
C. About remote control voltage output/frequency, what er can do is output from the converter lead, connected to an external control box with a display panel to achieve remote control. Thus our remote control is wired, it is not software.

Yes. Ok, based on your specs, recommended frequency converter model: HZ-50-3375, 75kVA power capacity, input: 3ph, Wye (L1,L2,L3 + N,G), 480V (+/- 10%), 50/60Hz and output: 3ph, Wye/Delta (L1,L2,L3 + N,G), adjustable (0-520V), adjustable (40-120Hz), 104.2A.

The 104.2A is the max inrush current the frequency converter can handle, so, even the in-rush current duration for your application is less than 0.5 seconds, recommended converter would be 75kVA as listed below.