Kavach

Cab Signalling & Automatic Train Protection System for Digital Railways

Lalit Mansukhani Kumar, Chandra Kishore Prasad, Babu Ramesh Babu

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Hardback

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English

BS Publications
01 September 2025

Circuits & components; Trains & railways: general interest

Over the past few decades the world has undergone a significant shift towards digitalization and the railway industry has not been left behind. The Indian Railways one of the largest railway networks globally has taken the lead in adopting digital technologies to improve train safety and efficiency.

""Kavach Cab Signalling based Automatic Train Protection System for Digital Railway"" is a comprehensive guide that explains the indigenously developed technology for train protection and safety jointly created by the Indian Railways and Indian eco-system. This book covers the

key concepts and technical aspects of the Kavach system which is set to revolutionize train safety and operations in India.

The Kavach system offers monitoring and control of train movement constant supervision of speed and automatic braking in case of any potential danger. It comes with train and track-side sensors communication systems track-side and on-board vital processors compliant to SIL 4

architecture and algorithms that quickly detect and respond to any threat to train safety.

The technology behind Automatic Train Protection Systems can be classified into two categories based upon mechanism of exchange of information between trackside and train units

- Radio based and non-radio based. Kavach- Cab signalling & Automatic Train Protection system is a Radio based system designed to enhance train traffic throughput and adaptable to newer functionality to meet the future roadmap of Indian Railways.

It is a remarkable feat for a country to have their own indigenously developed radio-based ATP (Automatic Train Protection) with cab-signalling system for their mainline railway. In fact only a handful of nations in the world have been able to achieve this level of technological advancement. This accomplishment reflects the country's commitment to innovation and infrastructure development as well as their ability to compete on a global scale in the transportation industry

This book targets Bachelor of Technology students railway professionals and researchers interested in digital train control and protection technology. Itprovides an in-depth understanding of the Kavach system's concepts design operation communication systems and implementation.

The Kavach system demonstrates the Indian Railways' commitment to innovation and technological advancement. We believe that this book will be an excellent resource for anyone interested in learning more about this ground breaking technology.

By: Lalit Mansukhani Kumar, Chandra Kishore Prasad, Babu Ramesh Babu
Imprint: BS Publications
Dimensions: Height: 235mm, Width: 191mm, Spine: 13mm
Weight: 558g
ISBN: 9789395038355
ISBN 10: 9395038357
Pages: 198
Publication Date: 01 September 2025
Audience: General/trade , ELT Advanced
Format: Hardback
Publisher's Status: Active

Lalit Kumar Mansukhani is All-India topper of his IRSSE batch and holds more than 30 years of experience in Railway Industry including 4 years of the UK Railway Signalling Design House. He has also served in ISRO for 4 years. He is recipient of several awards and accolades. He is regarded as the prime architect of Cab signalling based IR-ATP Kavach and its radio communication backbone, MComm. As Director/Signal/RDSO, he pioneered the core R&D and coordinated the field trials in association with three Indian firms in 265 kms section which included Train Traffic Throughput Enhancement. His name appears as an inventor in the Kavach s Patent application. He made inhouse presentation of Kavach to the Hon ble Prime Minister of India in 2016. Currently, he is heading Indian Railways' Centre of Excellence for Modern Signalling-Kavach at IRISET as Officer on Special Duty. He has served in various positions on Indian Railways in areas encompassing Operations and Maintenance, Projects, OFC, Microwave Transmission & Switching System, Planning, Performance Management, Training and Disaster Management and RailTel in his 30 yearscareer in Rail Transportation. He served as Executive Director, on deputation to RailTel Corporation of India Ltd, in-charge of Southern Region and was instrumental in building of Tier III Uptime Facility Certified Data Centre at Hyderabad, Design to Operation of Cloud services based on Software Defined Data Centre architecture and Green Edge Datacentres at 5 cities. He is from Indian Railway Service of Signal Engineers- 1991 batch.He has received many awards and accolades for his Digital Transformation initiatives notable being IDC, Data Quest, Indian Express, and Business Transformation Award from Economic Times & Hindustan Times media. Currently he is engaged in training development & capacity building for indigenously developed ATP-Kavach, Proof of Concept for LTE and Working group on 5G. He is closely working with AICTE & MoSDE for skill development in Signalling & Kavach for various technical roles in addition to the Digital Transformation initiatives at IRISET He belongs to Indian Railway Service of Signal Engineers- 1998 batch. He was associated with projects of signalling installations and commissioning including Railway Electrification and Electronic Interlocking. At present, he is working as Senior Professor/Signal in Indian Railways Institute of Signal Engineering and Telecommunications (IRISET). He oversees the simulation and laboratory set up of KAVACH available for trainees at IRISET.