{"id":136401,"date":"2023-08-31T08:57:24","date_gmt":"2023-08-31T03:27:24","guid":{"rendered":"https:\/\/www.oliveboard.in\/blog\/?p=136401"},"modified":"2023-08-31T08:57:25","modified_gmt":"2023-08-31T03:27:25","slug":"kolkata-metro-railway-will-now-use-composite-aluminium-third-rail","status":"publish","type":"post","link":"https:\/\/www.oliveboard.in\/blog\/kolkata-metro-railway-will-now-use-composite-aluminium-third-rail\/","title":{"rendered":"Kolkata Metro Railway will now use Composite Aluminium Third Rail"},"content":{"rendered":"\n<p><strong>Kolkata Metro Railway, which was inaugurated on October 24, 1984, as India&#8217;s first metro system, has played a vital role in connecting the city of Kolkata for almost four decades, serving as a crucial lifeline.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile\" style=\"grid-template-columns:auto 39%\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"604\" height=\"805\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2023\/08\/Kolkata-Metro-Railway-is-set-to-become-member-of-elite-club-of-London-Moscow-Berlin-Munich-and-Istanbul-Metro.jpg\" alt=\"Kolkata Metro Railway is set to become member of elite club of London, Moscow, Berlin, Munich, and Istanbul Metro.\" class=\"wp-image-136403 size-full\"\/><\/figure><div class=\"wp-block-media-text__content\">\n<p>The metro system operates by supplying power to the metro train cars through a steel third rail, which provides 750V DC. The Third Rail Current Collector (TRCC), made of steel, is installed on the metro train cars to gather current from this third rail.<\/p>\n\n\n\n<p>For the past 40 years, Kolkata Metro Railway has been utilizing steel third rail technology. However, as part of its ongoing development efforts, <strong>Kolkata Metro Railway has decided to adopt composite aluminium third rail technology<\/strong> for all its upcoming corridors under construction. Additionally, the railway plans to retrofit its existing corridors, which currently use steel third rails, with the new aluminium third rails.<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Kolkata Metro Railway Plans<\/h2>\n\n\n\n<p>Metro Railway <a href=\"https:\/\/www.oliveboard.in\/blog\/kolkata-embraces-innovative-air-quality-early-warning-system\/\" target=\"_blank\" rel=\"noreferrer noopener\">Kolkata<\/a> has taken significant steps to upgrade its infrastructure by initiating the replacement of the existing steel third rail with the more advanced composite aluminium third rail technology. <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>To facilitate this transition, the railway has issued a tender for the replacement work. <\/li><li>The replacement process will be carried out in multiple phases to cover different sections of the metro line.<\/li><li>In the first phase, the replacement work will be undertaken for the section between Dumdum and Shyambazar. <\/li><li>Following this, the second phase will involve the replacement of the third rail between Shyambazar and Central, as well as J D Park to Tollygunge. <\/li><li>Finally, in the third phase, the section from Mahanayak Uttam Kumar (Tollygunge) to Kavi Subhash (New Garia) will undergo the replacement process. <\/li><li><strong>In total, approximately 35 route kilometres of the main line&#8217;s steel third rail will be replaced in stages, marking a significant modernization effort for Kolkata&#8217;s metro infrastructure.<\/strong><\/li><\/ul>\n\n\n\n<p><strong>This transition will place Kolkata among a select group of international cities, including London, Moscow, Berlin, Munich, and Istanbul, that have also transitioned from steel to aluminium third rails in their metro systems.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages of Composite Aluminium Third Rail Over Steel Third Rail<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Reduced Resistive Current Loss:<\/strong> The composite Aluminium Third Rail has significantly lower resistance compared to steel Third Rail. This leads to <strong>decreased resistive current losses, resulting in improved efficiency in power transmission<\/strong>.<\/li><li><strong>Enhanced Traction Voltage Level:<\/strong> The superior conductivity of the composite Aluminium Third Rail leads to higher traction voltage levels. This positively impacts train performance and overall operational efficiency.<\/li><li><strong>Savings in Traction Substations:<\/strong> Utilizing the Aluminium composite Third Rail for a 10 km corridor requires one less Traction Substation compared to steel Third Rail. This translates to <strong>direct savings of approximately \u20b9210 Crores in capital investment for a 35 km Metro corridor<\/strong>.<\/li><li><strong>Accelerated Train Acceleration:<\/strong> The reduced voltage drop associated with the Aluminium Third Rail contributes to quicker train acceleration. This improvement is achievable with the existing fleet of metro trains.<\/li><li><strong>Lower Maintenance Costs:<\/strong> The new rail material reduces maintenance expenses. The need for repainting the Third Rail every 5 years becomes unnecessary, and there&#8217;s a less frequent need to measure Third Rail dimensions. Moreover, the risk of damage due to rust is minimized.<\/li><li><strong>Enhanced Train Operations:<\/strong> The use of composite Aluminium Third Rail results in better train operation efficiency, ensuring smoother and more reliable journeys for passengers.<\/li><li><strong>Elevated Energy Efficiency and Environmental Impact:<\/strong> The shift to composite Aluminium Third Rail technology brings substantial energy savings and a reduction in carbon footprint. It&#8217;s estimated that <strong>around 6.7 million units of energy can be saved annually<\/strong>.<\/li><li><strong>Improved Train Frequency:<\/strong> Implementing the composite Aluminium Third Rail technology improves the interval between trains, enhancing the overall frequency and capacity of the metro system.<\/li><\/ul>\n\n\n\n<p>The adoption of composite aluminium third rail technology marks a major leap forward in Kolkata Metro Railway&#8217;s pursuit of efficiency, sustainability, and advanced infrastructure, resulting in improved service quality and reduced operational costs.<\/p>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2026\/04\/RBI-Grade-B-3-1-1.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/how-to-prepare-current-affairs-for-rbi-grade-b\/\">How to Prepare Monthly Current Affairs for RBI Grade B?<\/a><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/06\/Monthly-Current-Affairs-2026-PDF.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"Monthly Current Affairs 2026 PDF\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/monthly-current-affairs\/\">Monthly Current Affairs 2026 PDF For SSC, Banking, Railways<\/a><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2026\/04\/Money-Market-Quiz-Part-2.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/what-is-money-market\/\">Money Market Quiz, Get FREE PDF: Part 2<\/a><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2026\/04\/Money-Market-Quiz-Part-1.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"Money Market Quiz, Get FREE PDF: Part 1\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/money-market-quiz\/\">Money Market Quiz, Get FREE PDF: Part 1<\/a><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2019\/06\/Important-Questions-on-Banking-Awareness.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"Important Questions on Banking Awareness\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/important-questions-on-banking-awareness\/\">Important Questions on Banking Awareness, FREE PDF &amp; Quiz<\/a><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"84\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2026\/04\/Banking-Insurance-Awareness-MCQs.webp\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"Banking &amp; Insurance Awareness MCQs, 400+ Questions, FREE PDF\" style=\"\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/best-banking-insurance-awareness-mcqs\/\">Banking &amp; Insurance Awareness MCQs, 400+ Questions, FREE PDF<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Kolkata Metro Railway, which was inaugurated on October 24, 1984, as India&#8217;s first metro system, has played a vital role<\/p>\n","protected":false},"author":54,"featured_media":136402,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12574,10386],"tags":[77],"class_list":["post-136401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-august","category-current-affairs","tag-current-affairs","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kolkata Metro Railway will now use Composite Aluminium Third Rail<\/title>\n<meta name=\"description\" content=\"For the past 40 years, Kolkata Metro Railway has been utilizing steel third rail technology. 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