talking about how electricity is transferred from the power plant to the home.
it comes out from the plant at like 12000V, then using transformer is pumped up to like 240000V (keeping in mind that it's AC, which is why it can be transformed) this high voltage is necessary coz if resistance remains the same but voltage is increased, current decreases, and when current decreases, heat decreases (heat is produced when a current flows through something)
the electricity is carried on large structure thingos, high off the ground to prevent people getting shocked and stuff (electricity can jump at such high voltages)
the electricity is transformed down to 8000 in closer, more local areas, and transformed again near homes so that it gets down to 240V, which could still be fatal, but there isn't as much risk of the electricity jumping.
the electricity can't go through the pole because the pole would heat up and people who touch them could get electricuted. so, the electricity is diverted; isolated away from the pole, they are detoured around with other cables, and ceramic discs are used to prevent the electricity from getting to the posts (ceramics cant hold water and cant conduct electricity anyway) the higher the voltage, the more ceramic discs basically.
some power.. tower thingies.. what are they called? dont detour around poles, instead the electricity runs through the same cable, but are connected to the.. big crap but isolated using the same discs, but heaps more of them.
there is also usaully cables all the way up the top, in case of lightning. the lightning would go into those cables, and since they're touching the structures, would go all the way down to the ground and get earthed.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment