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August 2018

Pylon of the Month - August 2018

IMG_20180508_180815303_HDR (3)
 
August's Pylon of the Month is another first because it features a temporary pylon.  By the time you read this, it might already be too late to see it in real life but rest assured that if reports of any other temporary pylons come into Pylon HQ, I'll be sure to get the news out on Twitter @pylonofthemonth. The picture arrived via email with a comment that:
 
The installation of a temporary pylon to allow repair of the main one is new to me but probably old hat to a pylon aficionado.
 
Actually, it was the first time I've seen a temporary pylon in action and so I'm very grateful for the picture.  You can clearly see where the wires have come off the main pylon leaving just the ceramic insulator discs hanging on.  The reason for that is explained on a National Grid information sheet
 
 
The refurbishment is carried out as two separate periods of work. This is because overhead lines have two circuits, one on each side of the pylon, so work is carried out on one side only, in order that the other side can be kept ‘live’. Once all the work has been completed on one side of the overhead line, the circuit is re-energised, and the opposite side is switched off so that the work can be carried out on that side.
 
The same information sheet reveals that "pylons will last for about 80 years, whereas the conductors, insulators and fittings normally last for about 40 years. Therefore each overhead line will usually go through at least one refurbishment during its lifespan".
 
The temporary pylon is (or perhaps was) in Pembrokeshire on the northern of the two runs from Pembroke power station, the largest gas-fired power station in Europe which opened in 2012.  If you do want to rack it down, then the Grid reference is SN 16483 10847 and you can use this website to get a good view of the pylons.