Don't believe everything technical you read on the internet.Thank you, did not know about 416V (weird supply), so looking into it I found the following:
States that 416V is primarily for Crypto-Mining application.![]()
Guide to Common Industrial Transformer Voltages
Ever wondered why industrial equipment has different supply voltages? Check out our guide to common transformer voltages for all your different applications.www.maddoxtransformer.com
We're looking for European equipment to come into the US that requires 400V, so most likely will stick with 400V secondary.
Is Maddox reputable?
I have installed several Maddox transformers in the past couple years, haven’t had an issue yet. They are very quiet.Thank you, did not know about 416V (weird supply), so looking into it I found the following:
States that 416V is primarily for Crypto-Mining application.![]()
Guide to Common Industrial Transformer Voltages
Ever wondered why industrial equipment has different supply voltages? Check out our guide to common transformer voltages for all your different applications.www.maddoxtransformer.com
We're looking for European equipment to come into the US that requires 400V, so most likely will stick with 400V secondary.
Is Maddox reputable?
Thanks for the comment. I'll have to review with others here.Don't believe everything technical you read on the internet.
People have been using 416/240V system for decades. They power European equipment as well as computer power supplies. The problem with European equipment is it often wants 50Hz.
Good to hear! Thank you.I have installed several Maddox transformers in the past couple years, haven’t had an issue yet. They are very quiet.
Will look into Hammonds. Thanks.Have purchased a few HPS (Hammond) transformers over the years.
Here is a screenshot of some standard 3 phase (aluminum winding) step down units from their catalog ...
Noted. We're not in a rush to procure, so we had time to research brands.When you to the bottom, dry-type transformers are quite reliable and most (all) on the market will be UL listed. The chief selectors are usually what the local supplier carries or has on the shelf unless an entire distribution package is being RFQ'd (e.g. switchboards, panels, transformers, etc). I wouldn't bother chasing a specific brand unless there's a good reason.
Great info.Member Jaref has a great post on 'Nominal System Voltage' vs 'Nominal Utilization Voltage':
Voltage Ratings: 110/115/120, 220/230/240 or 440/460/480
This subject comes up a LOT in this and other forums, so I thought it would be a good idea to make it a "Sticky" that can be found and referred to easily when it comes up. There are two "standards" for voltage in North America depending on which END of the wire you are looking at; "Distribution...forums.mikeholt.com
For NEC load calculations in article 220.5 I use 416Y/240 as my 'Nominal System Voltage' feeders, panels and branch circuits also fault current calcs.
'Nominal Utilization Voltage' is 400Y/230 for 430.6(A) I use a custom table based on 400V 60HZ.
Personally I dont care too much about what brand I get, its more about price, availability, and shipping. They are mostly all pretty much bullet proof. I bought one from these guys a year ago because they had it in stock and I needed it ASAP:From your experience, would any one of you experts be able to recommend a reliable dropping transformer brand capable of:
3-phase, 60Hz
480V primary
400V secondary
40kVA min.
Thanks!