ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Photocell
by twh. 01/22/18 05:06 PM
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 26 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
O/T pole pigs with 240/480 secondaries #200852
04/22/11 11:38 AM
04/22/11 11:38 AM
L
LarryC  Offline OP
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
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?

Work Gear for Electricians and the Trades
Re: O/T pole pigs with 240/480 secondaries [Re: LarryC] #200867
04/23/11 07:05 PM
04/23/11 07:05 PM
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
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.
Re: O/T pole pigs with 240/480 secondaries [Re: Tom] #200872
04/23/11 08:45 PM
04/23/11 08:45 PM
L
LarryC  Offline OP
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
OK, thanks.

Re: O/T pole pigs with 240/480 secondaries [Re: Tom] #200880
04/24/11 08:25 PM
04/24/11 08:25 PM
L
LarryC  Offline OP
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
Is 240/480 delta a common configuration for oil fields too?

Re: O/T pole pigs with 240/480 secondaries [Re: LarryC] #200881
04/25/11 02:00 AM
04/25/11 02:00 AM
Lostazhell  Offline
Member
Joined: Feb 2004
Posts: 1,431
Bakersfield, CA (Originally Or...
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


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,595 Are you busy
180,393 Re: Forum
170,863 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.040s Queries: 15 (0.030s) Memory: 0.9659 MB (Peak: 1.1073 MB) Zlib enabled. Server Time: 2018-01-22 23:58:00 UTC