WmAl Posted December 7, 2008 Share #1 Posted December 7, 2008 Advertisement (gone after registration) M8 & 28mm Elmarit Quote Link to post Share on other sites More sharing options...
Advertisement Posted December 7, 2008 Posted December 7, 2008 Hi WmAl, Take a look here Power Grid: 3-Gorges, China. I'm sure you'll find what you were looking for!
andit Posted December 7, 2008 Share #2 Posted December 7, 2008 If I recall the stats of the 3 Gorges Dam, they are generating something in the region of 32,000 Mega Watts. From what I can see looking at these pylons, they appear to be carrying 6 phases per line, judging by the construction of the pylons - 132kV per line - there should be many more lines heading out from the dam (in terms of pylon construction these are fairly lightweight - our transcontinental lines here, run at 400kV with pylons at least 3 times the strength of these). I don't know how much ambient noise there is around, but you should be able to hear the buzz as you approach the lines, plus feel the hair on your arms rise from the magnetic fields. Quite an amazing feeling actually. Thanks for sharing. Andreas Quote Link to post Share on other sites More sharing options...
WmAl Posted December 8, 2008 Author Share #3 Posted December 8, 2008 If I recall the stats of the 3 Gorges Dam, they are generating something in the region of 32,000 Mega Watts. From what I can see looking at these pylons, they appear to be carrying 6 phases per line, judging by the construction of the pylons - 132kV per line - there should be many more lines heading out from the dam (in terms of pylon construction these are fairly lightweight - our transcontinental lines here, run at 400kV with pylons at least 3 times the strength of these). I don't know how much ambient noise there is around, but you should be able to hear the buzz as you approach the lines, plus feel the hair on your arms rise from the magnetic fields. Quite an amazing feeling actually. Andreas: These stats are very informative. I took these photos from a moving bus so I missed the buzz. Do these other pictures help in understanding their construction methods? Quote Link to post Share on other sites More sharing options...
andit Posted December 8, 2008 Share #4 Posted December 8, 2008 Hi William, These photo's do help quite a bit. These pylons are positively huge (it was difficult to judge in the original image). Since they are running 4 strands per phase, they are transmitting what I would assume to be 400kV (thats 400,000 Volts). When you walk under these lines you really hear them buzz, plus the hair on your arms stands up absolutely straight from the magnetic fields. The little stars that you see between the single strands are there to stop random swaying of the lines in high winds. In my work, I do amongst other things, thermographic inspections of power lines. Using Infrared Camera's (these camera's build up an image based on energy radiation instead of visible light), you see where heat is building up. This shows where problems are happening (bad/loose/corroded connections). So I often get under these power lines. Thanks for posting the other images. It must have been an amazing experience. Andreas Quote Link to post Share on other sites More sharing options...
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