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Interaction | April 2014

Laying MV cables on guide-way beam was a major challenge

It was a tough job to work at a height of 11 m, especially on a narrow crowded footpath, keeping the public safety in mind, says SC Bhargava, Senior Vice President and Head (Electrical & Automation) Larsen And Toubro Ltd while speaking on the challenges faced during construction stages of India's first Monorail project.  

What has been the role of L&T Electrical and Automation as far as the monorail project in Mumbai is concerned?
 L&T's Railway Business Unit (RLBU) partnered with Scomi for the entire monorail project. This project was assisted by two business units of L&T Electrical and Automation, i.e., Electrical Systems and Equipment (ESE), and Control and Automation (C&A). The ESE provided the power supply and distribution as well as electrical and mechanical services, whereas the C&A provided the project with the Automatic Fare Collection (AFC) system. On the other hand, the railway business unit provided the DC Traction system.


Could you brief us at length on the contribution of ESE for this project?
 The ESE successfully provided the entire air-conditioning systems, electrification as well as solutions like design of the whole HT-22 kV and 415 V distribution system, supply equipment like 22 kV and 415 V switchboards, 315 kVA / 1600 kVA distribution transformers, firefighting systems, lighting and ventilation systems, cables - both 22 kV and LT - to complete the whole ring of supply.


After construction, maintenance plays an important role. In this case, what has been your input towards maintenance?
 In terms of design and documentation, C&A identified and implemented the business rules, fare media layout, MMI finalisation, and made provisions for future interoperability. It supplied the central computer system, card identification device, station computer system, automatic gates, ticket vending and office machines, tickets readers, and portable ticket decorders.


Later, in terms of quality assurance, C&A conducted IP testing of equipment like TVM and TRs. It provided project management services, and supervised the installation and commission process. Further, for nearly three years, the C&A will supervise 24X7 the AMC services.


What kind of challenges did you come across while working on this project?
 One of the challenging tasks was while laying the Medium Voltage (MV) cables on the guide-way beam, especially when it was over creeks. It was a tough job to work at a height of 11 m, especially on a narrow crowded footpath, keeping public safety in mind. Also, handling logistics and equipment at such a height was difficult. Thus, working in a densely populated area without hampering traffic movement that too in the allotted time frame was the biggest challenge, which was been successfully met.

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