ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 261 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jul 2004
Posts: 787
L
LarryC Offline OP
Member
I was looking at the classified ads on this site. Somebody has a bunch of pole transformers that have 240/480 secondaries.

In what application would they be used?

Joined: Jan 2001
Posts: 1,044
Tom Offline
Member
I see these around mine sites quite a bit. Many mine sites use 240 or 480 3 phase Delta ungrounded systems as permitted by 250.21 (A)(4). These transformers could also be used for a corner grounded Delta.


Few things are harder to put up with than the annoyance of a good example.
Joined: Jul 2004
Posts: 787
L
LarryC Offline OP
Member
OK, thanks.

Joined: Jul 2004
Posts: 787
L
LarryC Offline OP
Member
Is 240/480 delta a common configuration for oil fields too?

Joined: Feb 2004
Posts: 1,438
Member
yes it is... 99% of the 480V running around the oil fields in western Kern Co, CA are ungrounded delta sec's. with delta primary on 12KV systems and Wye on 21KV systems


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5