David Dahle

David Dahle

Posted on 01/16/2016


Photo taken on March 15, 2015


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Keywords

4160V
230kV
115kV
41.6kV


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Otter Tail Power - Forman, ND

Otter Tail Power - Forman, ND
A picture of the transmission sub - 230/115/41.6/4.16kV.

The dead line in front was taken out of service as it crossed several lakes. Further down this retired line: www.ipernity.com/doc/ndlinegeek/18861123

Tony Glen, Sean Kinnier, Jesse Lor have particularly liked this photo


Comments
Tony Glen
Tony Glen
Interesting how the fiber optic cable from the 115kV H-Frame go over the sub to two dead end poles.
2 years ago.
David Dahle has replied to Tony Glen
That's actually 230kV and I'm not sure if that was fiberoptic cable - I'd think OTP's SCADA system is more likely to be linked together by regular T1 broadband lines.
2 years ago.
Tony Glen has replied to David Dahle
Oops my bad ;) I've become interested in how utilities monitor the electric system. Altalink always used microwave and now they are starting to install fiber optics.
2 years ago.
David Dahle
David Dahle
One detail I missed is the permanently open 230kV switch behind the control hut. It looks like OTP Forman was originally a 230/41.6kV sub only but after the Forman North 41.6kV circuit was converted to 115kV, OTP installed a 230/115/41.6kV transformer at the north end of the sub, converting the 41.6kV bays into a switching station.

The big transformer on the left is for the Forman 4160V system.
2 years ago. Edited 2 years ago.