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AGILITY TRAINS ANNOUNCED AS PREFERRED

· 2020-06-02
Currency not verifiedStudy materialreservation
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Date2020-06-02
TypeCommercial Circular
Topicreservation
CurrencyCurrency not verified

Summary

S1 Basics of Indian Railway Signalling Ver.1.0

Text of the circular

BASICS OF RAILWAY 
SIGNAL ENGINEERING 
G.V.RAO-ITD2
IRISET/SC
SUBJECT
IRISET- SECUNDERABAD
1

CHAPTER -1
INTRODUCTION TO RAILWAY SIGNALLING 
SUBJECT
IRISET- SECUNDERABAD
2

VARIOUS TRANSPORT SYSTEM

AGILITY TRAINS ANNOUNCED AS*PREFERRED
BIDDER FOR INTERCITY EXPRESS
PROGRAMME (IEP)

hae i»

Teal

Railway signalling 
• Railway Signal- apparatus used to provide non-
verbal, safe and precise information to driver
• Aspect-
How signal appears ( Red, Yellow& Green ) 
• Indication- Information provided by aspect
• ON aspect- Most restrictive aspect  ( RED for Stop Sig)
• OFF aspect- Other than ON aspect ( Yellow / Double 
Yellow/ Green )
SUBJECT
IRISET- SECUNDERABAD
5

ROAD SIGNAL
Railway signal
SUBJECT
IRISET- SECUNDERABAD
6

Two Aspect Lower Quadrant Signalling
ON Aspect: 00 to 50
Indication- Stop Dead
OFF Aspect: 450 to 600 
Indication- Proceed
7
02.06.2020
S1 Basics of Indian Railway Signalling  Ver.1.0
I. Stop Signal

Stop Dead
Proceed and be prepared to 
stop at the next Stop Signal
Proceed
400 to 450
850 to 900
8
00 to 50
02.06.2020
S1 Basics of Indian Railway Signalling  Ver.1.0
Upper Quadrant Semaphore Signalling
I. Stop Signal

Multiple Aspect Colour Light Signals
I. Stop Signal (Three aspect)
9
Proceed
Caution
Stop
02.06.2020
S1 Basics of Indian Railway Signalling  Ver.1.0

10
02.06.2020
S1 Basics of Indian Railway Signalling  Ver.1.0
Multiple Aspect Colour Light Signals
Stop Signal (Four aspect)

Need for Signaling in Railways:
• Signalling in railways has evolved for the following:
• Running trains safely by securing it`s intended path. 
• Handle more trains effectively.
• Unambiguous & Timely Communication to Loco 
Pilot for regulating speed of train 
• The Train Loco Pilot is very much dependent on the 
aspect of the signal for controlling the speed of train
SUBJECT
IRISET- SECUNDERABAD
11

Railway Signalling conveys the following
• Timely information to Loco Pilot for regulating 
speed of his train.
• Information is conveyed by a signal showing various 
aspects. 
.  Many signals are interlinked for giving advance 
information.
• A signal  ensures  
• Physical clearance of intended path.
• Securing various points in the path.
• Closure of Level crossing gates.
• No other train is moving in this path.
SUBJECT
IRISET- SECUNDERABAD
12

Axle with wheels
S.V. Rao
13

Wheel Flange  
G.V Rao- ITD2
14

Point
G.V. Rao
15
Stock Rail, Tongue rail ( Switch rails )
STOCK RAIL

Points & Cross over

Individual Point
17
1676 MM

Point Clamp

18

POINTS : A Mechanism provided on the track to facilitate 
diversion of trains from one route  to another.
(Our Engines do not have steering wheel as available in motor 
cars)
Trailing Point
Facing Point
Facing Point & Trailing Point
Crossing

Point reverse 
Sig yellow with route

Point normal 
Sig yellow without  route

Point.A
Pt.B
X
Y
Z
Pt.C
Pt. A                                     for train X
Pt. B                                     for train Y
Pt. C                                     for train Z
Pt. B                                     for train Z
T
F
F
T
EXAMPLE

Points  & Signals
S.V. Rao
24

25
TURNOUTS
FACING POINT
TRAILING POINT
SE4-CAVACH   VER-1.0
IRISET- SECUNDERABAD

Station yard ( Points ) 
S.V. Rao
26

Signalling concepts
CONTROL OVER MOVEMENT OF TRAINS
Time Interval Method and
Space Interval Method
02.06.2020
27
S1 Basics of Indian Railway Signalling  Ver.1.0

• Trains cannot be steered away as in the case of other
transports.
• They are required to follow one another in the same
direction on the length of track.
• Another set of diversion track is required to be provided
either for overtaking vehicles moving in the same direction
or for crossing the vehicles from the opposite direction.
Control over movement of trains
02.06.2020
28
S1 Basics of Indian Railway Signalling  Ver.1.0

Time Interval Method-
• Different types of trains like, Express/Mail, passenger, 
high-speed freight and low speed freight shunting 
trains are running etc.
• The speed of all the trains are not s

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