Power distribution technologies support 14km expansion of subway connections to Chongqing city in China

Power distribution technologies support 14km expansion of subway connections to Chongqing city in China

ABB has been chosen to provide low-voltage power distribution solutions for the 2nd phase of Subway Line 6 Branch Line of Chongqing Rail Transit (Group) Co., Ltd. (CRT).

Since 2012, ABB has supplied services to Subway Line 2, 3, 5, 6, 10 and the Circle Line Project of CRT, including improving the reliability and safety of their power distribution system. This has created an accessible rail transit network that carries more than 3 million people each day.

The expansion will accelerate specific further development of the Liangjiang New Area, which was started in 2010.

The technology

In CRT’s Subway Line 6 Branch Line Project, ABB’s latest Emax 2 air circuit breakers, OT switch-disconnectors, S200 miniature circuit breakers (MCBs) and new Tmax XT molded case circuit breakers (MCCBs) were deployed, allowing the customer to make more reliable and easier operation & maintenance efforts.

Integrating such features as system protection, load protection, generator management, energy metering and analysis, Emax 2 can solve the electrical problems that may occur in the power distribution system of rail transit. It can also be efficiently controlled and managed. In addition, it can also meet the future upgrading and scalability needs by adding digital modules.


The 2nd phase of branch line of CRT Subway Line 6 is 14.022km long, including underground part of 8.994km, elevated part of 4.901km and subgrade part of 0.127km. It has 7 stations, including 5 underground ones and 2 elevated ones, and is scheduled to be completed by the end of 2020.

ABB has been supporting Chongqing’s sustainable development with its leading electrification and automation products and solutions, and has participated in many key projects in Chongqing, such as Chongqing Jiangbei International Airport, Nanchuan Stadium, the Urban Light Rail Project, and the Chang’an Ford (Chongqing) Factory.

“A more accessible, eco-friendly and three-dimensional urban rail transit network is an effective way to address transport challenges facing a modern metropolis. With a complete portfolio of products and professional services, ABB provides integrated electrification solutions for rail transit system. We provide safer and more intelligent and efficient power distribution solutions that help further boost power distribution level, reduce operation and maintenance costs, and create greater value for customers.” Remarked James Zhao, lead business manager of Electrification Business in ABB China.

ABB (ABBN: SIX Swiss Ex) is a leading global engineering company that energizes the transformation of society and industry to achieve a more productive, sustainable future. By connecting software to its electrification, robotics, automation and motion portfolio, ABB pushes the boundaries of technology to drive performance to new levels. With a history of excellence stretching back more than 130 years, ABB’s success is driven by 144,000 talented employees in over 100 countries. www.abb.com

ABB’s Electrification business is a global leader in electrical solutions, operating in more than 100 countries, with over 200 manufacturing sites. Approximately 53,000 employees are dedicated to delivering the future of safe, smart and sustainable electrification, for industries, public services and communities. With advanced ABB AbilityTM enabled digital solutions at its core, our portfolio protects, connects and optimizes electrical energy supply. This includes the powering of industry, infrastructure and transportation, from data centers to smart buildings and e-mobility solutions; the integration of renewables; and the delivery of intelligent distribution and energy storage.


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