Page 187 - IRSEM_Main Book

Para No: 7.8.9 of IRSEM (Issue - July 2021): Table-3: Important Minimum Signalling Features
S.No DETAILS STD I STD II STD III STD IV
1 Maximum permissible speed Up to 50 Kmph Up to 110 Kmph Up to 140 Kmph Up to 160 Kmph
2 Isolation See Notes below Required Required Required
3 Point Operation, Locking & Point Machine Point Machine Point Machine Point Machine & Direct Clamp
Detection type with Thick web switches
4 Train Detection On all Run through On all Running Lines On all Running Lines On all Running Lines
(Track circuit/Axle Counters) Lines
5 MACLS Signalling, Movement MACLS MACLS MACLS MACLS, Movement Authority
authority
6 Block Working Permitted Permitted Permitted (Excluding Token) Permitted (Excluding Token)
(Absolute/Automatic Signaling) (Including Token (Excluding Token) or or
Working) 4A Automatic Signalling 4A Automatic Signalling
7 Double Distant/Automatic Not Compulsory Required Required Required
Signalling (On sections where Trains or or
have a Emergency Braking 4A Automatic Signalling 4A Automatic Signalling
Distance of more than 1 Km)
8 Last Vehicle verification Not Compulsory Required at stations with Required Required
centralized operation or in
high density routes
9 Relay/Electronic Interlocking RI/EI RI/EI RI/EI RI/EI
(RI/EI)
10 Mobile Train radio Not Compulsory Desirable Desirable Required
communication (MTRC) or LTE
or any other Technology
11 ATP (ETCS/TCAS/TPWS) Not Compulsory Desirable Desirable Required
with Cab Signalling for SPAD
mitigation
12 Centralised Traffic Control (CTC) Not Compulsory Desirable Desirable Desirable
(Contd..)

Chapter 7: Essentials of Signalling Page 155 of 535