Power Lines

Power Lines

Posted on 07/20/2013


Photo taken on July 20, 2013


See also...

Substations Substations



Keywords

115kV
27600V
substation


Authorizations, license

Visible by: Everyone
All rights reserved

109 visits

CL&P Campville 14R - Harwinton, CT

CL&P Campville 14R - Harwinton, CT
Here's one of the two main transformer units in the sub. This one, a Westinghouse unit, steps 115kV down to 16/27.6kV Y.

A side view of this transformer:

CL&P Campville 14R - Harwinton, CT

Tony Glen, André J.(Lineman80) have particularly liked this photo


Comments
Chetlaham
Chetlaham
Strange, I just noticed from the large version of the pic the neutral bushing is brown as apposed to the others. Huh???

On a side note, that on board tap changer makes the unit look even more dramatic.
5 years ago.
David Dahle
David Dahle
I'll bet the brown bushing is there as a marker to indicate it is not a live bushing. If CL&P wanted to run true ungrounded 27.6, all they need to do is disconnect that bushing. But it seems to me that there is some advantage in having a "wye point" on otherwise ungrounded delta systems in that the phases can be maintained at a known voltage relative to ground and not depend on the soundness of the system insulation alone. That and any faults that develop would make themselves obvious quickly and not exist undetected until a second fault on another phase develops.
5 years ago.
Power Lines
Power Lines
Interestingly enough, this transformer steps down the voltage at a ratio of 4.16/1 (27.6*4.16 = 115). Kinda funny how those numbers all come together, isn't it?
5 years ago.
David Dahle has replied to Power Lines
Oh that is interesting!
5 years ago.