In addition, the crossing of the red signal was tested; however, the locomotive did not pass the red signal because “Kavach” required the brakes to be applied automatically. The sound of the automatic whistle was loud and clear as the door signal approached.
The crew did not manually touch the sound and brake system during the test. The 30 km/h speed limit was tested when the locomotive was running on a loop line. ‘Kavach’ automatically reduced the speed to 30 km/h from 60 km/h when the locomotive entered the loop line.
Kavach is an ATP system developed locally by the Research Design and Standards Organization (RDSO) in collaboration with Indian industry and trials facilitated by South Central Railway to achieve the company’s objective of safety in railway operations on the roads Indian railways.
The state-of-the-art Safety Integrity Level – 4 electronic system is intended to provide protection by preventing trains from overtaking the signal when in danger and avoiding a collision. It automatically activates the brake system of the train if the driver fails to control the train according to the speed limits. In addition, it avoids collisions between two locomotives equipped with a working Kavach system.
“Kavach is one of the cheapest Safety Integrity Level 4 (SIL-4) certified technologies, with a probability of error of 1 in 10,000 years. Also, it opens up avenues for the export of this indigenous technology for the railways,” the ministry said.