Recommend a dropping transformer
- Thread starter cudco
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Suggest you contact your local electrical supplier
For 400V 'Nominal Utilization Voltage', such as 400V 60HZ nameplate motors I use a 416Y/240 "Nominal System Voltage". So you'll want to search for a 480 D : 416Y/240 transformer.
Maddox makes one
store.maddoxtransformer.com
All the major manufacturers are starting to support 416V.
Maddox makes one
3-Phase 480V Delta - 416 Y/ 240
This transformer converts 3-phase 480V Delta to 3-phase 416Y/240. Perfect for CNC machines, cryptocurrency miners, datacenter equipment and other machines.
store.maddoxtransformer.com
Thank you, did not know about 416V (weird supply), so looking into it I found the following:
www.maddoxtransformer.com
States that 416V is primarily for Crypto-Mining application.
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?
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?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
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.
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?
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.
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
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.
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.
Good to hear! Thank you.
ruxton.stanislaw Spammer
Suspended Member
- Location
- Arkansas
- Occupation
- Laboratory Engineer
433Y/250 V or 416Y/240 V is super normal in data centers. The most economic setup is one where a double conversion online UPS accepts standard 480 V utility service and outputs 240 V.
MD Automation
Senior Member
- Location
- Maryland
- Occupation
- Engineer
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 ...
Here is a screenshot of some standard 3 phase (aluminum winding) step down units from their catalog ...
Will look into Hammonds. Thanks.
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
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.
Member Jaref has a great post on 'Nominal System Voltage' vs 'Nominal Utilization Voltage':
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.
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.
Noted. We're not in a rush to procure, so we had time to research brands.
Great info.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
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:
TEMCo T39462 45 kVA, 480 Primary Volts x 400Y/230 Secondary Volts, 50/60 Hz, Three Phase, Aluminum
45 kVA, 480 Primary Volts x 400Y/230 Secondary Volts, 50/60 Hz, Three Phase, Aluminum
temcoindustrial.com
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
Please let us know what you decide upon and why, that'll add info to the topic for others to find.
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