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469 posts

Ultimate Geek
+1 received by user: 3

Topic # 112310 4-Dec-2012 17:14 Send private message

Is there any online site or any other method to find out how the kv rating of overhead lines in a certain area? Without having to actually go there and read the labels on side of poles.

Ive purchased a property with lines going over the bottom part of section.  Theres 3 sets of wires, each side, total 6, not pylons just concrete poles on the adjacent sections, so assuming probably 33kv.  I want to work out emf etc...

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855 posts

Ultimate Geek
+1 received by user: 68


  Reply # 726970 4-Dec-2012 17:17 Send private message

take a photo, more detail on the insulators

469 posts

Ultimate Geek
+1 received by user: 3

  Reply # 726977 4-Dec-2012 17:27 Send private message

have copied a picture from google street view down the bottom of road, same lines.

804 posts

Ultimate Geek


  Reply # 726978 4-Dec-2012 17:29 Send private message

Those are 11kV.

469 posts

Ultimate Geek
+1 received by user: 3

  Reply # 726979 4-Dec-2012 17:33 Send private message

mattRSK: Those are 11kV.


523 posts

Ultimate Geek
+1 received by user: 37

  Reply # 726981 4-Dec-2012 17:39 Send private message

They look like quite long insulators to me. More like 33kV than 11 kV would be my guess.


4512 posts

Uber Geek
+1 received by user: 223


  Reply # 726992 4-Dec-2012 17:54 Send private message

I would call the power company and ask. Failing that the local tree cutting contractor.

245 posts

Master Geek
+1 received by user: 20


  Reply # 727030 4-Dec-2012 19:02 Send private message

mattRSK: Those are 11kV.

I am in the "11kV" camp...

They look like pin insulators.

Michael Skyrme - Instrumentation & Controls

5968 posts

Uber Geek
+1 received by user: 109


  Reply # 727041 4-Dec-2012 19:30 Send private message

Definitely just local town reticulation, so only 11kV in my opinion, 33kV will use much longer insulators.


523 posts

Ultimate Geek
+1 received by user: 37

  Reply # 731514 12-Dec-2012 17:13 Send private message,175.712371&spn=0.026789,0.038581&t=m&z=15&layer=c&cbll=-40.343491,175.712248&panoid=_RoSfhc6gC8hMXz9UzHpnQ&cbp=12,91.85,,0,1.5

Here's a pic of the line to the first stage of Tararua Wind Farm on Fizherbert East Rd. There are two 33 kV circuits on top, 11 kV below, with an 11kV to 400V transformer under that. I still say that the insulators on the OP's pic are more similar to the 33 kV insulators on this line than the 11 kV ones.

2873 posts

Uber Geek
+1 received by user: 33


  Reply # 731530 12-Dec-2012 17:55 Send private message

Follow the line to the transformer, it is likely labelled. With the kV rating you can only work out electric field, not the more important magnetic field. That depends on the current through the wires, which varies all the time, so a spot field measurement is not good either.

You can never have enough Volvos!

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