Ashwini Vaishnaw inspects trial of Kavach System

Union Railways Minister Ashwini Vaishnaw during Kavach System trial in Secunderabad on March 4, 2022. (Photo/PIB)

Secunderabad: Union Railways Minister Ashwini Vaishnaw on March 4, 2022, inspected the trial of ‘Kavach’ working system between Gullaguda-Chitgidda Railway stations on Lingampalli-Vikarabad section in Secunderabad Division of South Central Railway.

Kavach is meant to provide protection by preventing trains to pass the signal at Danger (Red) and avoid collision. It activates the train braking system automatically if the driver fails to control the train as per the speed restrictions. In addition, it prevents collision between two Locomotives equipped with functional KAVACH system.

The Ministry of Railways informed in a press release that the Minister and Railway Board Chairman V.K. Tripathi were on board the locomotive which moved from Gullaguda towards Chitgidda.

During the trial, a Head-on-collision situation was created as both the locomotives were moving towards each other.

The ‘Kavach’ system initiated the automatic braking system and halted the locomotives 380 metres apart. Also, crossing the red signal was tested; however, the locomotive did not cross the red signal as ‘Kavach’ necessitated the application of brakes automatically.

The automatic whistle sound was loud and clear when gate signal approached. The crew did not manually touch the sound and braking system during the trial. The speed restriction of 30 Kmph was tested when the locomotive was run on loop line. ‘Kavach’ automatically reduced the speed to 30 Kmph from 60 Kmph as the locomotive entered the loop line. 

The KAVACH is an indigenously developed ATP system by the Research Design and Standards Organisation (RDSO) in collaboration with Indian industry and trials facilitated by South Central Railway to achieve the corporate objective of safety in train operations across Indian Railways. It is a state-of-the-art electronic system of Safety Integrity Level – 4 standards.

‘Kavach’ is one of the cheapest, Safety Integrity Level 4 (SIL-4) certified technologies with the probability of error is 1 in 10,000 years. Also, it opens avenues of export of this indigenous technology for Railways, the press release informed.

As a part of Atmanirbhar Bharat, 2,000 km of the network will be brought under Kavach for safety and capacity augmentation in 2022-23. Around 34,000 Kms of the network will be brought under Kavach.

Features of KAVACH

  1. Prevention of Signal Passing at Danger (SPAD)
  2. Continuous update of Movement Authority with display of signal aspects in Driver Machine Interface (DMI) / Loco Pilot operation cum Indication Panel (LPOCIP)
  3. Automatic Braking for Prevention of Over Speeding
  4. Auto Whistling while approaching Level Crossing Gates
  5. Prevention of collision between two Locomotives equipped with functional KAVACH
  6. SoS Messages during emergency situations
  7. Centralized live monitoring of Train movements through Network Monitor System.


96% of railway Traffic is carried on Indian Railway High-Density Network and Highly Used Network routes. To transport this traffic safely, KAVACH works are being taken up in a focused manner as per the following priority set by the Railway Board.

  1. First Priority : High Density Routes and on New Delhi – Mumbai & New Delhi – Howrah Sections for 160 Kmph with Automatic Block Signaling & Centralized Traffic Control. Since such sections have higher chances of human errors on part of drivers resulting into accidents as trains run closer to each other.
  2. Second Priority : On the Highly Used Networks with Automatic Block Signaling & Centralized Traffic Control.
  3. Third Priority: On other Passenger High Density Routes with Automatic Block Signaling.
  4. Fourth Priority:  All other routes. (Press Release)

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