Reply to thread

Message: <blockquote data-quote="AnuradhaRa" data-source="post: 30302608" data-attributes="member: 325076">[MEDIA=youtube]jduDyF2Zwd8:830[/MEDIA]Unlike AC return currents that generally follow  a path that matches the transmission line,DC currents can flow through the entire earth. In  essence, the electrodes are completely decoupled.That does mean they’re susceptible to some  environmental issues though. They createmagnetic fields that can affect compass  readings and magneto-sensitive fish likesalmon and eels. In ocean electrodes,  the current can cause electrolysis,breaking down seawater into toxic chemicals  like chloroform and bromoform. And, strayelectrical currents in the ground can flow  into pipelines and other buried structures,causing them to corrode. This is also a  problem with some electric trains that usethe rail as a return path.You may have heard that  electricity takes the path of least resistance,but that’s not really true. Electricity takes  all the paths it can in accordance with theirrelative conductivity. So, even though a big steel  rail is a lot more conductive than the earth, return current from traction motors can and does  flow into ground, sometimes corroding adjacentpipelines, and occasionally interfering  with buried telecommunication lines too.[USER=562115]@imhotep[/USER]</blockquote>

Top Bottom