Single phase transformers - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th June 2007, 08:49 PM   #1
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
Default Single phase transformers

This really belongs in the "to stupid to ask-forum" but as there is no such thing I'll try here: can a single phase transformer be used as a power trafo, on a regular power net (which I suppose is 2-phase)?

I suspect the anwer is no....

Simon
  Reply With Quote
Old 27th June 2007, 07:52 AM   #2
diyAudio Member
 
XEAGLEKEEPER's Avatar
 
Join Date: Jan 2006
Location: central Iowa
Single phase transformers are used all the time..What eactly did you have in mind?
__________________
Ret. USAF... AKA- Avionic *** Solder slinger for hire...***
  Reply With Quote
Old 28th June 2007, 03:17 PM   #3
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
Well, I always thought the electricity net was dual phase.....

Good to know that I can finally use those trafo's explicitly rated as 'monophase'

Simon
  Reply With Quote
Old 28th June 2007, 03:40 PM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The mains grid is 3-phase.

I think you better tell us exactly what you are trying to do before you possibly start a fire or injure others
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 28th June 2007, 06:51 PM   #5
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
Quote:
I think you better tell us exactly what you are trying to do before you possibly start a fire or injure others


Don't worry, I've built several tube-amps without succeeding in killing my wife....

Seriously, I've got a transformer that is labeled 'single phase trafo' and was wondering if it's usable as power transformer for an amp, given my false presumption that 'normal' trafo's are dual phase (to suit the mains grid which I thought was also dual phase). The guy at the electronics store told me yesterday that mains grid IS single phase, so my transformer is just your-average transformer.

However, you say the mains grid is three phase

Practically; can I use my single phase trafo on the mains grid or can it only be used in specific industrial environments where mains grid is single phase?

Thanks --- Simon
  Reply With Quote
Old 28th June 2007, 07:24 PM   #6
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Because you were vague with your original post you received confusing-to-you answers. The mains power grid is 3-phase, the power that comes into your home is 1-phase. You need 1-phase transformer to connect to the mains.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 28th June 2007, 07:50 PM   #7
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
That's a very clear-to-me answer.

Simon
  Reply With Quote
Old 28th June 2007, 09:47 PM   #8
diyAudio Member
 
Speedskater's Avatar
 
Join Date: Sep 2002
Location: Lakewood, Ohio
In the US household service is often referred to as split phase. 3 wires into the house. 2 hot 120 Volt wires and a Neutral wire. A total of 240 Volts from one hot wire to the other. Commercial and Industrial users have three phase service. 3 hot wires (and maybe or maybe not a neutral) the phase between each hot wire is 120 degrees.
So maybe the transformer in question has a 2 wire primary rather than a 3 wire center tapped primary.
__________________
Kevin
  Reply With Quote
Old 29th June 2007, 10:43 AM   #9
Klimon is offline Klimon  Belgium
diyAudio Member
 
Join Date: Apr 2005
Location: Leuven
Quote:
So maybe the transformer in question has a 2 wire primary rather than a 3 wire center tapped primary.
It has, but I don't know if that has something to do with the denomination. Trafo's without centre-tap, atleast HV ones built or usable for tube-amps, are as common as center-tapped trafo's.

Simon
  Reply With Quote
Old 29th June 2007, 11:44 AM   #10
Symon is offline Symon  United Kingdom
diyAudio Member
 
Join Date: Mar 2002
Location: Herts, UK
A three phase transformer will have 3 cores each with it's own primary and secondary windings.
http://www.3phasepower.org/3phasetransformers.htm

So a 3 phase transformer would look very different to a conventional single phase transformer. The fact it has 2 primary windings is usually an indication it can be setup for 120 or 240 Volt operation.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Are single drivers really phase coherent? chuck55 Full Range 46 30th March 2010 06:03 AM
Phase Plugs For Single Full Range Drivers thetubeguy1954 Full Range 15 23rd June 2008 10:09 AM
phase splitting transformers Empee Tubes / Valves 16 27th January 2008 06:39 PM
Phase splitter transformers kopite Tubes / Valves 2 15th July 2005 06:50 AM


New To Site? Need Help?

All times are GMT. The time now is 04:59 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2