David Dahle

David Dahle

Posted on 05/26/2013


Photo taken on May 22, 2013


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7200V


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OTP & Whetstone Valley - Marvin, SD

OTP & Whetstone Valley - Marvin, SD
Not sure whose pole this is exactly, but this is probably the ONLY case I've seen where two completely different utilities have a circuit on the SAME arm.

These are two separate 7200V circuits - NOT a 12.5kV open wye line!

The line on the sky yuk bowl is Whetstone Valley Electric Coop (serving rural Marvin) and the line on the post is Otter Tail Power's line into the town of Marvin, SD.

Jesse Lor, Tony Glen have particularly liked this photo


7 comments - The latest ones
Power Lines
Power Lines
Are they both sharing the neutral?
4 years ago.
David Dahle
David Dahle
They are indeed. Both are grounded in their respective subs (the OTP 7200V line does have a neutral all the way back to the sub).
4 years ago.
Power Lines
Power Lines
Does Otter Tail run any long distance (i. e. greater than 5 miles) SWER's? I know I've seen ground-return Y used on some of their long haul three-phase feeders, but I can't recall seeing any SWER's that weren't short branch lines.
4 years ago.
David Dahle
David Dahle
As for singlephase ground-return, I can think of only a handful (including one that MIGHT be 2400V), and all are branch lines less than a mile long.
4 years ago.
Power Lines
Power Lines
An interesting thought just crossed my mind after looking at this picture....I wonder how far out of phase those two circuits are with each other?
3 years ago.
David Dahle has replied to Power Lines
Hmmm...! Good question. The Whetstone Valley sub is on East River's 69kV system (fed from WAPA Summit 115/69/41.6kV sub), and the OTP line starts from the Marvin-Corona sub which of course is on the 41.6kV system (normal feed I believe is from the Browns Valley 230/41.6kV sub, backup feed from the WAPA Summit sub).
3 years ago.
Austin Taylor
Austin Taylor
That is sure interesting that 2 companies use the same cross arm for their circuits. Most of the time I've seen 2 companies sharing the same pole each company has it own cross arm. I've even seen two companies have circuits on different poles on each side of the road.
11 months ago.