Forum Title: O/T pole pigs with 240/480 secondaries
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?
Category: General Electrical Discussion Post By: Alan Jones (Sergeant Bluff, IA), 03/23/2017
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.

- House Pro (Chandler, OK), 03/25/2017

OK, thanks.

- Robert Doherty (Forman, ND), 03/25/2017

Is 240/480 delta a common configuration for oil fields too?

- Dwight Love (Green, OH), 03/25/2017

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