I'm connecting three phase step down auto transformer. 400V input and 230V output. It's to supply a piece of equipment brought over from America and the load won't be balanced.

My question is, is the star point common for both the line and load side neutral connections? I'm leaning towards yes, being an auto transformer the windings aren't electrically separate but I'm not 100% sure on this one.

Cheers ?IMG_20210818_151525.jpg
 
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At least it's in the proper phase colours red, white, and blue; not the modern silly colours we were forced to use.
 
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Perth
If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
Australia
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Practising Electrician (Qualified - Domestic or Commercial etc)

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Auto Transformer Neutral
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Talk Electrician Forum
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Eikraps,
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Julie.,
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