ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 3
dsk 3
Recent Posts
High Leg Delta, phase angles
by andey. 06/27/17 09:39 AM
Mains supply in GDR
by Texas_Ranger. 06/27/17 07:44 AM
Feed to spa panel
by HotLine1. 06/25/17 05:28 PM
Weatherhead, POA, height?
by HotLine1. 06/24/17 02:37 PM
Windows 7 update problem
by ampherder. 06/21/17 07:01 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
238,261 Are you busy
173,475 Re: Forum
166,274 Need opinion
Who's Online Now
1 registered members (andey), 76 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#217593 - 09/09/16 03:38 AM Calculating transformer loads  
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,326
Alaska
Just carious. If I had running data from with the primary or secondary side of a transformer, can the other side be calculated based off of the transformer data plate or perhaps other data?


"Live Awesome!" - Kevin Carosa

Tools for Electricians:

#217594 - 09/09/16 09:07 AM Re: Calculating transformer loads [Re: sparkyinak]  
ampherder  Offline
Member
Joined: Sep 2011
Posts: 20
VA
Volt-amps in = volt-amps out + losses.


#217595 - 09/09/16 01:32 PM Re: Calculating transformer loads [Re: sparkyinak]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,085
Estero,Fl,usa
It is calculating those "losses" that separate electricians from engineers. wink


Greg Fretwell

#217596 - 09/09/16 02:44 PM Re: Calculating transformer loads [Re: gfretwell]  
twh  Offline
Member
Joined: Mar 2004
Posts: 915
Regina, Sask.
My guess is the losses are I squared x R, calculated for the line side and the load side. I don't think the hum uses much power.


#217597 - 09/09/16 05:52 PM Re: Calculating transformer loads [Re: sparkyinak]  
wa2ise  Offline
Member
Joined: Nov 2002
Posts: 782
Oradell NJ USA
There's also the losses in the transformer laminations. Better quality steel would have lower losses, but would be more expensive. The transformer would not get as hot while it is powered but unloaded. Probably less hum.


#217598 - 09/09/16 11:01 PM Re: Calculating transformer loads [Re: sparkyinak]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,085
Estero,Fl,usa
If Scott stops by I am sure he can tell us about a whole lot of things that affect "loss" in a transformer. I have bumped around the edges of this stuff but just enough to understand this is more than 2 coils of wire and a core when you get down to the nitty gritty of the difference between the "goesinna" and the "comesoutta". The only thing I know is the loss ends up being mostly heat so the temp this thing runs at is a pretty good clue about the efficiency.


Greg Fretwell


Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,878
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 15 (0.003s) Memory: 0.7773 MB (Peak: 0.9271 MB) Zlib enabled. Server Time: 2017-06-27 13:48:37 UTC