Скачать с ютуб Why Aluminium Is Used in Transmission Lines? Not copper? | Explained In Tamil в хорошем качестве

Why Aluminium Is Used in Transmission Lines? Not copper? | Explained In Tamil

Why Aluminium Is Used in Transmission Lines?Not copper? | Explained In Tamil Electrical Pattarai Now patreon   / electricalpattarai   Copper is Costly Copper is a heavy metal Copper need Tin plating to avoid oxidation Copper is a hard cash for thieves to sell —- Aluminium is lighter in weight Aluminium is cheaper Aluminium has fair conductivity to carry current Aluminum don't get oxidized like copper. hence doesn't need any plating aluminum conductor steel rainforced (ACSR) is used for transmission lines. Aluminum has not very good conductivity and tensile strength like copper material but by aluminum rainforcedment, it's tensile strength can be increased and as it's cost is very low than copper material as well as it has low specific gravity, so this ACSR conductor is used in transmission lines. Actually conductivity of aluminium is less than copper. Aluminum is used for transmission lines when copper is better material for transmission lines as far as electrical conductivity , mechanical strength (tensile) and thermal coefficient of expansion is considered. Lower conductivity of aluminum means more power loss as compared to copper for same conductor size. Also, lower tensile strength and higher thermal coefficient of expansion of aluminum cause higher sag on transmission line which call for more conductor and higher height of supporting structure for sufficient ground clearance. However Aluminum is cheaper and lighter than copper. For the same power loss aluminum conductors gives theoretically 50% mass saving as copper is 1.7 times more conductive but has 3.3 times more mass than aluminum. This cost and mass saving is significant for the transmission lines which generally run for thousands of km. (Copper has high electrical conductivity of 5.96×10^7 S/m as compared to 3.50×10^7 S/m of Aluminum.Aluminum has mass density of 2.70 g/cm^3 as compared to 8.89 g/cm^3 of copper) ►►Watch More... அப்டினா என்ன ? SERIES VIDEOS https://goo.gl/vYCTGz SCIENCE VIDEOS https://goo.gl/pZ3NLE CAREER GUIDANCE VIDEOS https://goo.gl/rRF2Hr BASICS OF ELECTRICAL ENGINEERING https://goo.gl/emgJ3k TRANSFORMER https://goo.gl/VkVED4 TOP 10 ELECTRICAL VIDEOS https://goo.gl/4L8XEB MECHANICAL ENGINEERING VIDEOS https://goo.gl/2t7qSK TWO WAY SWITCH CONNECTIONS https://goo.gl/JBiaX3 GOVT JOB UPDATES https://goo.gl/rDApRK ***************************************************************** THANK YOU ALL for your support - அனைவருக்கும் நன்றி ***************************************************************** Follow us on Facebook   / electricalpattarai   Google + https://plus.google.com/+ElectricalPa... Blogger https://electricalpattarai.blogspot.in/ Dailymotion https://www.dailymotion.com/electrica... ***************************************************************** உங்களுக்கு எது போன்ற வீடியோகள் வேண்டும் என்பதை கமெண்ட் - ல் குறிப்பிடவும் ***************************************************************** DISCLAIMER: This Channel DOES NOT Promote or encourage Any illegal activities , all contents provided by This Channel is meant for EDUCATIONAL PURPOSE only . Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.