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44/2024-25 17-04-2024
Chennai
KAVACH – Automatic Train Protection System on Southern Railway


Supreme Court has appreciated the Indian Railways’ efforts to implement the Anti Collision system of “Kavach” in trains in a PIL case. As a part of the Indian Railway project of implementing the KAVACH, the following is the current status of the same in Southern Railway.

The indigenously developed Train Collision Avoidance system of Indian Railways called “KAVACH” has been developed by the Research Design and Standards Organisation (RDSO) in collaboration with Indian Industry. Southern Railway has been closely associated with its implementation since the development stage and is facilitating trials to achieve the objective of safety in train operations across Indian Railways. KAVACH is meant to provide protection by preventing trains to pass the Signal Passing at Danger (SPAD) (i.e., Red – Stop Signal) and avoid collision. It activates the train breaking system automatically if the driver fails to control the train as per the speed restrictions. In addition, it prevents collision between two Trains / Locomotives, equipped with functional KAVACH system.

Main Features of Kavach:

Prevention of Trains / Locomotives Passing Signal at Danger (SPAD)

Continuous update of Movement Authority with display of signal aspects in Driver Machine Interface (DMI) / Loco Pilot operation cum Indication Panel (LPOCIP)

Automatic Braking for Prevention of Over Speeding

Auto-Whistling while approaching Level Crossing Gates

Prevention of collision between two Locomotives equipped with functional KAVACH

SoS Messages during emergency situations

Centralized live monitoring of Train movements through Network Monitor

Provision of KAVACH will be an additional Safety aid to the Loco Pilots to prevent consequences arising out of Signal Passing At Danger (SPAD), to control train speed within specified limits, to display Signal Aspect in Engine cab and to further reduce the probability of train collisions in block sections and o­n running lines at stations through certain non-signalling based protections.

KAVACH, will be a powerful aid in assisting Railways in realising the Objective of “Zero Accidents” by eliminating train collisions. This is being accorded Top priority towards Modernisation of Signalling Systems o­n IR.

The work of Provision of KAVACH on Southern Railway is for 2216 RKM  o­n High Density Network and High Uitilised Network, which is being done in a phased manner, with a priority of Vande Bharat Routes, as follows:

1. On High Density Network (HDN) – 271 RKM

Division

Section

RKM

Route

MAS

Chennai – Arakkonam section

68

HDN

MAS

Arakkonam – Renigunta section

65

HDN

MAS

Chennai – Gudur Section

138

HDN

2.High Utilised Network (HUN) – 1945 RKM

Division

Section

KMS

Route

MAS

Arakkonam – Jolarpettai

150

HUN

MAS

Dr MGR Chennai Central – Chennai Beach

6.62

HUN

MAS

Chennai Egmore – Tambaram - Chengalpattu

60

HUN

MAS

Chengalpattu – Villupuram

102.76

HUN

SA

Jolarpettai – Salem – Erode

179.29

HUN

SA

Erode – Irugur – Coimbatore – Podanur

106.54

HUN

SA

Irugur – Podanur

10.77

HUN

SA

Erode – Karur

65.38

HUN

SA

Salem – Namakkal – Karur

85.19

HUN

TPJ

Villupuram - Tiruchchirappalli

178

HUN

MDU

Tiruchchirapalli – Dindigul

94.31

HUN

MDU

Dindigul – Madurai

65.78

HUN

MDU

Madurai – Virudunagar

43.18

HUN

MDU

Virudunagar – Vanchi Maniyachi

84.48

HUN

MDU

Vanchi Maniyachi – Tirunelveli

28.9

HUN

PGT

Podanur – Palakkad – Shoranur

95.88

HUN

TVC

Shoranur - Ernakulam

106.85

HUN

TVC

Ernakulam – Kottayam – Kayankulam

114.65

HUN

TVC

Ernakulam – Alappuzha – Kayankulam

100.34

HUN

TVC

Kayankulam – Trivandrum

105.33

HUN

TVC

Trivandrum - Kanniyakumari

86.54

HUN

TVC

Tirunelveli – Nagercoil

73.29

HUN

ARCHITECTURE OF KAVACH

Kavach broadly comprises of “Stationary Control Unit” and “On- Board Equipment”. Stationary Control Unit is the network of “Station control unit”, “radio unit”, and an “array of passive radio frequency identifier (RFID) tags” positioned at all the crucial locations of the station and block sections. “On- Board Equipment” comprises of  “Brake interface” & an  “onboard computer “connected to a speed sensor, RFID reader, radio unit, and display unit.

On-board RFID reader is mounted o­n the under frame of the locomotive such that it can read the RFID tags fitted between the rails and collect data like unique tag id, direction of travel, unique track identification number (TIN). This data is communicated to the Station Control Unit through the radio link. Station Control Unit locates the train in its database, based o­n the RFID tag ID and sends the information like approaching signal aspect, distance to the locomotive.

On- Board equipment uses the information provided by the Station Control Unit like approaching signal aspect, movement authority (MA), and collects the speed of the train through sensors mounted o­n loco axle to determine whether the loco is traveling in safe speed limits. In case, the locomotive is running beyond safe speed an alert is sounded to the loco pilot for 5 seconds before initiating the brakes and bringing the train to a complete stop.

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(M.Senthamil Selvan)
Chief Public Relations Officer




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