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Post by biskit on Apr 11, 2015 15:58:19 GMT -5
This deviation/junction pylon has fascinated me for many years, it is on a 132kV line running from Norristhorpe near Heckmondwike to somewhere near Dewsbury. From this tower, a single circuit line is tee'd off, but I don't know where it goes! I've always liked being able to see close up how the single circuit line tees off the twin conductor two circuit line on this tower. Hope the link works... s1015.photobucket.com/user/biskitrail/library/Pylons/11-4-15Can anyone tell me what types of towers make up this line, and the big deviation/junction one in particular? Also I only noticed today when I took the photos that the single circuit line continues in almost an exact straight line from the main route, while the main route deviates sharply at this point, so I wonder if that was originally the main route and it has been altered more recently - would this be plausible? Many thanks, Ben.
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Post by caldridge on Apr 12, 2015 13:12:43 GMT -5
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Post by biskit on Apr 13, 2015 14:50:41 GMT -5
Thanks Christopher, My curiosity got the better of me today and I went for a closer look at towers 1 and 2 in this line. Annoyingly I didn't have my camera, however I did notice that tower 2 (a D60 or possibly even a D90) is very similar to the deviation tower above so presumably also an L3. The terminal tower is also similar but that has the top set of arms as the longest with the middle ones shorter and the bottom ones shorter still, is this normal for terminal towers? Also is it normal to have a line using L3C suspension towers but all the deviation ones normal L3?
What's unusual about the single circuit PL16, and can you suggest why this tower has been used rather than a PL1S like the rest?
Sorry for all the questions, I'm sure this is basic stuff! Ben.
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Post by caldridge on Apr 13, 2015 15:52:54 GMT -5
Thanks Christopher, My curiosity got the better of me today and I went for a closer look at towers 1 and 2 in this line. Annoyingly I didn't have my camera, however I did notice that tower 2 (a D60 or possibly even a D90) is very similar to the deviation tower above so presumably also an L3. The terminal tower is also similar but that has the top set of arms as the longest with the middle ones shorter and the bottom ones shorter still, is this normal for terminal towers? Also is it normal to have a line using L3C suspension towers but all the deviation ones normal L3? I’m not too sure, I haven’t seen any L3C pylons in person but it is quite common, not sure if we can get L3C deviation towers. What's unusual about the single circuit PL16, and can you suggest why this tower has been used rather than a PL1S like the rest?. What I mean is, the middle insulator and cable is on the opposite side of the pylon to the others, usually they are all on the same side. Here’s on I found at Lytchett Matravers in Dorset. i1222.photobucket.com/albums/dd486/cmaldridge/DSCF4864.jpgI’m not sure why it’s strung like that, but they do connect to a PB SS0 route just outside the village and before heading to Sandford. Christopher
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Post by yv47r on Apr 17, 2015 13:49:50 GMT -5
I would say that the tower referred to is actually an L2 DT as to me the contruction looks more akin to L2 than L3. And I don't know whether they ever did an L3 D90 and the L3 DT terminal towers I have seen tend to have large top cross arms, medium middle and short angled bottom cross arms.
As for the L3C these again from my own observations only come as the standard D suspension tower and the deviation towers are L3 designs. An example not far from here is the New Mills to Buxton L3/C set that uses all L3C suspension towers and a mix of D10/D30/D60 and one solitary D40EC tower and then two L2 ST towers at Buxton. A drive along the A6 towards Buxton shadows the line most of the way.
The PL16 tower used as shown could simply be a replacement tower for the original PL1b S tower due to damage or repositioned to increase span height clearance.
Cheers Paul
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