David Dahle

David Dahle

Posted on 01/16/2016


Photo taken on March 15, 2015


See also...


Keywords

4160V
230kV
115kV
41.6kV


Authorizations, license

Visible by: Everyone
All rights reserved

124 visits

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.
19 months 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.
19 months 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.
19 months 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.
18 months ago. Edited 18 months ago.