maintenece handbook on auto signaling for indian railways

CATECH/2000/S/AS/1.0

CHAPTER 1

AUTOMATIC SIGNALLING

1.1 INTRODUCTION

Automatic block working is a system of train working in which movement of the train is controlled by the automatic stop signal. These signals are operated automatically by the passage of trains in to through and out of the automatic signalling sections.

1.2 FEATURES

Automatic block system

The line shall be provided with continuous track circuiting or axle counters.

Block section is divided into various small-signalling sections.

Each signalling section is governed by an Automatic stop signal.

Each signalling section is further divided into berthing and overlap track circuit.

Maintenance handbook on March.2001Automatic signalling

1


1.3 ADVANTAGES

Line capacity increases.

Less dependence on human agencies.

Automatic stop signal can be passed at `ON' position as per General Rule 9.02 , after stopping one minute by day and two minutes by night.

1.4 Automatic stop signal

Automatic stop signals are multiple Aspect colour light signals.( 3Aspect/ 4 Aspect stop signals)

Aspect of Automatic stop signal

are controlled by the movement of train.


2

Letter ‘A’ in black on white circular disc

Fig no.1

A

White illuminated letter ‘A’ against black background


Numbering of signals -Normally odd nos. for up direction and even nos. for down direction.

Automatic stop signal is provided with `A' marker.

Semi Automatic Stop Signal

Semi Automatic stop signal can work as a manual stop signal/ Automatic stop signal.

Semi Automatic signal is provided with illuminated ‘A’ sign.

Illuminated 'A' sign will lit when signal is working as Automatic stop signal.

Illuminated ‘A’ sign will not lit when signal is working as a manual stop signal.

Controlled by king lever/ knob/ switch.

Cascading arrangement- When a colour light signal is showing a particular aspect and its lamp of that aspect fuses then signal becomes blank. To avoid this condition, cascading or cutting in arrangement in the lamp controlling circuit is provided in such a way that if a lamp fuses the signal can be restored to next restrictive aspect.Example. If green lamp fuses (when signal is displaying clear aspect), then the more restrictive yellow aspect can


3

Fig. No.2

AAAA


be lit or if yellow lamp fuses (when signal is displaying caution aspect) then red aspect can be lit.

Red lamp protection: It is provided to avoid the passing of train in no light condition of a signal. In this case the rear signal will show ON aspect, when signal ahead is showing no light.

1.5 LEVEL CROSSING GATE IN AUTOMATIC SIGNALLING SECTION :

LEVEL CROSSING GATE:

In Automatic signalling area, the signal controlling movement over LC gate are semi-automatic signals. Semi Automatic gate signal will be in "ON" position, when gate is open for road traffic.

Level Crossing Gate signal (when no point in the route)

Yellow circular disc with ‘G’ letter in black and illuminated ‘A’ letter against black background are provided.


4


Illuminated “A” sign of the Semi-Automatic gate signal will lit when the level crossing gate is closed against the road traffic and signal is working as an Automatic stop signal.


5

Letter ‘G’ in black on yellow circular disc

white illuminated letter ‘A’ against black background

AAAA

G

Fig no. 3


Level Crossing Gate signal (when points are in the route)

Illuminated ‘A’ and ‘AG’ sign are provided on gate signal..

Illuminated “A” sign will lit when level crossing is closed against road traffic and points in the route are correctly set and locked and signal is working as an Automatic stop signal.

Illuminated ‘AG’ sign will lit when points in the route are correctly set and locked and LC gate is defective and signal is working as an Automatic stop signal.

1.6 Lamps mostly used in colour light signal are tabulated below:

SR.NO.

REF.TYPE

RATING VOLT/WATT

PURPOSE

1.2

SL18 12V/24W 2 pole single filament for OFF aspect.

2.3

SL 21 12V/33W 2 pole double filament for ON aspect.

3.4

SL33 110V/25W 2 pole single filament direction type route indicators.

4.5

SL35 A 12V/24W Triple pole double filament parallel for OFF aspect.


6

A AG

Fig no. 4


5.6

SL35 B 12V/33W Triple pole double filament in parallel of same capacity for ON aspect.

CHAPTER 2

AUTOMATIC SIGNALLING CIRCUITS

Automatic signalling circuits are mainly of two type i.e. Siemens and Q series type.

2.1 SIEMENS TYPE

a) Circuit with Mini Relay Groups ( Provided in Auto location )

S1 S3 S5 S7 S9 1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT

Fig No.5

I. When the train is on 1 AT and signal S3 is showing green aspect. The relay status for signal S3 shall be as under:

Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DR S3 HECR S3 PR S3 BR S3 HHECR S3 DECPR 3 TPR S3 DECR S3 DHHECPR 3 ATPR S3 HATPR S3 HECPR S3 TPSR S3 HHR S3 DATPR S3 TCR

S1 S3 S5


7


1T 1AT 3T 3AT 5T 5AT Fig No.6

II. The train passes signal S3 and occupies 3T (Train is occupying 1AT and 3T). Signal S3 will show red aspect. The relay status for signal S3 shall be as under:

Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DR S3 HECR S3 PR S3 BR S3 HHECR S3 DECPR 3 TPR S3 DECR S3 DHHEPCR 3 ATPR S3 HATPR S3 HECPR S3 TPSR S3 HHR S3 DATPR S3 TCR

S1 S3 S5


III. The train has cleared 1AT and occupied 3 T only. The relay status for signal S3 shall be same as previous condition II.


8


S1 S3 S5


IV. The train occupies 3T and 3AT. The relay status for

signal S3 shall be as under:


S1 S3 S5


V. The train has cleared 3T and occupied 3AT only. The relay status for signal S3 shall be as under :



9


S1 S3 S5

1T 1AT 3T 3AT 5T 5ATFig No.10

VI. The train passes signal S5 and occupies 5T (Train is on 3AT and 5T). Signal S5 will show red aspect. The relay status for signal S3 shall be same as previous condition V.

S1 S3 S5

1T 1AT 3T 3AT 5T 5AT

Fig No.11VII. The train has cleared 3AT and on 5T only. The relay

status for signal S3 shall be as under :



10


S3 S5 S7 S9

1AT 3T 3AT 5T 5AT 7T 7AT 9T Fig No.12

VIII.

The train occupies 5AT. (Train is on 5T and 5AT). The relay status for signal S3 shall be same as previous condition VII.

S3 S5 S7 S9


IX. Train has cleared 5T and occupies 5AT only. Signal S3 will display yellow aspect. The relay status for signal S3 shall be as under :



11


Fig No.14

X. The train passes signal S7 and occupies 7T (train is on 5AT and 7T). Signal S7 shows red aspect. The relay status for Signal S-3 shall be same as

previous condition IX .

S3 S5 S7 S9

1AT 3T 3AT 5T 5AT 7T 7AT 9T

Fig No.15XI. The train has cleared 5AT and occupying 7T only. The

relay status for signal S3 shall be same as previous condition IX .

S3 S5 S7 S9


XII. Train occupies 7AT (train is on 7T and 7AT). The relay status for Signal S-3 shall be same as of condition IX .


12

S3 S5 S7 S9

1AT 3T 3AT 5T 5AT 7T 7AT 9T


S3 S5 S7 S9 1AT 3T 3AT 5T 5AT 7T 7AT 9T

Fig No.17XIII. Train has cleared 7T and occupies 7AT only. Signal

S3 will display Double Yellow aspect and signal S5 will display yellow aspect. The relay status for signal

S3 shall be as under :

Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR SDR S3 HECR S3 PR SBR S3 HHECR S3 DECPR TPR S3 DECR S3 DHHEPCR ATPR S3 HATPR S3 HECPR S3 TPSR S3 HHR S3 DATPR S3 TCR

S3 S5 S7 S9


XIV The train passes signal S9. Signal S9 shows red aspect. (Train is on 7AT and 9T). The relay status for Signal S3 shall be same as previous condition XIII .


13


S3 S5 S7 S91AT 3T 3AT 5T 5AT 7T 7AT 9T

Fig No.19

XV. Train has cleared 7AT and occupies 9T only. The relay status for signal S-3 shall remain same as

previous condition XIV.

S3 S5 S7 S9

1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT Fig No.20

XVI. Train occupies 9AT ( train is on 9T and 9AT). The relay status for Signal S-3 shall remain same as previous condition XV.

S3 S5 S7 S9

1AT 3T 3AT 5T 5AT 7T 7AT 9T 9ATFig No.21

XVII. Train has cleared 9T and occupies 9AT only. Signal S-3 will display Green aspect, signal S-5 will display double yellow aspect and signal S-7 will display yellow aspect. The relay status for signal S-3 shall be as under :


14




15


S1 S3 S5 S7 S9

1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9ATFig No.22

RELAY STATUS FOR DIFFERENT TRAIN MOVEMENT IN AUTOMATIC SIGNALLING

Pos

itio

n of

T

rain

S3

RE

CR

S3

HE

CR

S3

HH

EC

R

S3

DE

CR

S3

HA

TP

R

S3

TP

SR

S3

DA

TP

R

S3

HH

AT

PR

S3

PR

S3

DE

CP

R

S3

DH

HE

CP

R

S3

HE

CP

R

S3

HH

R

S3

TC

R

S3

DR

S3

BR

3 T

PR

3 A

TP

R

Rem

arks

1AT S3-G1AT/3T

S3-R

3T S3-R

3T/ 3AT

S3-R

3AT S3-R

3AT/5T

S3-R

5T S3-R

5T/ 5AT

S3-R

5AT S3-Y5AT/7T

S3-Y

7T S3-Y

7T/ 7AT

S3-Y

7AT S3-YY7AT/9T

S3-YY

9T S3-YY

9T/ 9AT

S3-YY

9AT S3-G


16


(b) Circuit with Main Signal GroupS1 S3 S5 S7 S9

1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT

Fig No.23I. When the train is on 1 AT and signal S3 is showing

green aspect. The relay status for signal S3 shall be as under:

Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3 S3 HECR S3 GR2 S3 GR4 S3 DECR S3 RE(Mn)CPR S3 HHECPR S3 GYR S3 DECPR 3 TPR S3 GLSR S3 GR3 3 ATPR

S3 GR1 S3 HECPR

S1 S3 S5 S7 S9

1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9ATFig No.24

II. The train passes signal S3 and occupies 3T (Train is occupying 1AT and 3T). Signal S3 will show red aspect. The relay status for signal S3 shall be as under:

Relays Status Relays Status Relays Status

S3 RE(Mn)CR S3 GPR1 S3 GPR3 S3 HECR S3 GR2 S3 GR4 S3 DECR S3 RE(Mn)CPR S3 HHECPR S3 GYR S3 DECPR 3 TPR S3 GLSR S3 GR3 3 ATPR S3 GR1 S3 HECPR


17


S1 S3 S5 S7 S9


Fig No.25III. The train has cleared 1AT and occupied 3 T only.

The relay status for signal S3 shall be as previous condition II.

S1 S3 S5 S7 S9


Fig No.26IV. The train occupies 3T and 3AT. The relay status for signal

S3 shall be as under:

Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3 S3 HECR S3 GR2 S3 GR4 S3 DECR S3 RE(Mn)CPR S3 HHECPR S3 GYR S3 DECPR 3 TPR S3 GLSR S3 GR3 3 ATPR S3 GR1 S3 HECPR

S1 S3 S5 S7 S9


Fig No.27V. The train has cleared 3T and occupied 3AT only. The

relay status for signal S3 shall be as under :

Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3 S3 HECR S3 GR2 S3 GR4


18


S3 DECR S3 RE(Mn)CPR S3 HHECPR S3 GYR S3 DECPR 3 TPR S3 GLSR S3 GR3 3 ATPR S3 GR1 S3 HECPR

S1 S3 S5 S7 S9


Fig No.28VI. The train passes signal S5 and occupies 5T (Train is

on 3AT and 5T). Signal S5 will show red aspect. The relay status for signal S3 shall be as under :


S1 S3 S5 S7 S9


Fig No.29VII. The train has cleared 3AT and on 5T only. The relay

status for signal S3 shall be as under :



19


S1 S3 S5 S7 S9


Fig No.30VIII. The train occupies 5AT.

(Train is on 5T and 5AT). The relay status for signal S3 shall be as previous condition VII.

S1 S3 S5 S7 S9


Fig No.31IX. Train has cleared 5T and occupies 5AT only. Signal

S3 will display Yellow aspect. The relay status for signal S3 shall be as under :


S1 S3 S5 S7 S9


Fig No.32X. The train passes signal S7 and occupies 7T (train is on

5AT and 7T). Signal S7 shows red aspect. The relay status for Signal S-3 shall be same as previous condition IX.


20


S1 S3 S5 S7 S9


Fig No.33XI. The train has cleared 5AT and occupies 7T only. The

relay status for signal S3 shall remain same as previous condition X.

S1 S3 S5 S7 S9


Fig No.34XII. Train occupies 7AT (train is on 7T and 7AT).The

relay status for Signal S-3 shall remain same as previous condition XI.

S1 S3 S5 S7 S9


Fig No.35XIII. Train has cleared 7T and occupies 7AT only. Signal

S3 will display Double Yellow aspect. The relay status for signal S3 shall be as under :



21


S1 S3 S5 S7 S9


Fig No.36

XIV. The train passes signal S9. Signal S9 shows red aspect. (Train is on 7AT and 9T). The relay status for Signal S3 shall remain same as previous condition XIII.

S1 S3 S5 S7 S9


Fig No.37XV. Train has cleared 7AT and occupies 9T only. The

relay status for signal S-3 shall remain same as previous condition XIV.

S1 S3 S5 S7 S9


Fig No.38XVI. Train occupies 9AT ( train is on 9T and 9AT). The

relay status for Signal S-3 shall remain same as previous condition XV.


22


1 S3 S5 S7 S9


Fig No.39XVII. Train has cleared 9T and occupies 9AT only. Signal

S-3 will display Green aspect. The relay status for signal S-3 shall be as under :

Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3 3 HECR S3 GR2 S3 GR4 S3 DECR S3 RE(Mn)CPR S3 HHECPR S3 GYR S3 DECPR 3 TPR S3 GLSR S3 GR3 3 ATPR S3 GR1 S3 HECPR


23


S1 S3 S5 S7 S9


Fig No.40RELAY STATUS OF DIFFERENT TRAIN MOVEMENT IN AUTO. SIGNALLING

Pos

itio

n o

f T

rain

S3

RE

(Mn

)CR

S3

HE

CR

S3

DE

CR

S3

GY

R

S3

GL

SR

S3G

R1

S3G

PR

1

S3G

R2

S3R

E(M

n)C

PR

S3D

EC

PR

S3G

R3

S3H

EC

PR

S3G

PR

3

S3G

R4

S3H

HE

CP

R

3TP

R

3AT

PR

Rem

ark

s

1AT S3-G1AT/3T

S3-R

3T S3-R

3T/ 3AT

S3-R

3AT S3-R

3AT/5T

S3-R

5T S3-R

5T/ 5AT

S3-R

5AT S3-Y5AT/7T

S3-Y

7T S3-Y

7T/ 7AT

S3-Y

7AT S3-YY7AT/9T

S3-YY

9T S3-YY

9T/ 9AT

S3-YY

9AT S3-G


24


Symbols used in Siemens circuit

Front contact of normally up Relay

Back contact of normally up Relay

Back contact of normally drop Relay

Front contact of normally drop relay

Note –Typical Automatic signalling circuit using Siemens main signal group is shown in Annexure I and a typical signalling circuit using Q series relays is shown in Annexure II.

Cascading / cutting in arrangement-

Relay status Aspect

I. GR1 AND GR2 DECR YII. GR1, GR2, GR3, GR4 G

III. GR1, GR2, GR4, GR3 YYIV. HECR, HHECR, DECR R


25


2.2 Q series type

S1 S3 S5 S7 S9


Fig. No.41I. Train is on 1 AT and signal no. S 3 is showing green

aspect. The relay status for signal S3 will be as given below:

Relay Status Relay Status3 HR 3 ATR

3 DR 3 HECR

3 HHR 3 HHECR

3 DECR 3 RECR

3 TR

S1 S3 S5 S7 S9


Fig. No.42II. Train has occupied 1 AT and 3T-signal S3 will show Red

aspect and its relay status will be as given below:


3 DR 3 HECR

3 HHR 3 HHECR

3 DECR 3 RECR

3 TR


26


S1 S3 S5 S7 S9


Fig. No.43III. Train has cleared 1AT and occupying 3T. Relay status for

signal S3 will be same as above as previous condition II..

S1 S3 S5 S7 S9


Fig. No.44IV. Now train is on 3T and 3 AT. Relay status for signal S3

will be same as above except 3ATR

S1 S3 S5 S7 S9


Fig. No.45V. Train cleared 3T and occupying 3AT. The relay status for

signal S-3 will be same only 3TR will pick up 3TR

S1 S3 S5 S7 S9


Fig. No.46VI. Now train is occupying 3AT and 5T, signal S5 will show

red aspect. Relay status for signal S3 will be same as above as per previous condition V.


27


S1 S3 S5 S7 S9


Fig. No.47VII. Train cleared 3AT and occupying 5T only. Relay status

for signal S3 will be same as above as previous condition VI except 3 ATR .

S1 S3 S5 S7 S9


Fig. No.48VIII. Train is occupying 5T and 5AT. Relay status for signal S3

will be same as above as previous condition VII.

S1 S3 S5 S7 S9


Fig. No.49IX. Train cleared 5T and occupying 5AT only. Signal S3 will

display yellow aspect. Relay status for signal S3 will be same as given below


3 DR 3 HECR

3 HHR 3 HHECR

3 DECR 3 RECR

3 TR


28


S1 S3 S5 S7 S9


Fig. No.50

X. Train is occupying 5AT and 7T. Signal S7 will show danger/red aspect. Relay status for signal S3 will be same as above.

S1 S3 S5 S7 S9


Fig. No.51

XI. Train cleared 5AT and occupying 7 T. Relay status for signal S3 will be same as previous condition X.

S1 S3 S5 S7 S9


Fig. No.52

XII. Train is occupying 7T and 7AT. Relay status for signal S3 will be same as previous condition XI.


29


S1 S3 S5 S7 S9


Fig. No.53

XIII. Train cleared 7T and occupying 7 AT. Relay status for Signal S3 will be changed. Signal S-3 will display double yellow and S-5 will display yellow.

3HHR 3HHECR

S1 S3 S5 S7 S9


Fig. No.54

XIV. Train is occupying 7AT and 9T. Signal S9 will display Red aspect and relay status for S3 will be previous condition XIII.

S1 S3 S5 S7 S9


Fig. No.55

XV. Train cleared 7AT and occupying 9T only. Relay status for S3 will be previous condition XIV.


30


S1 S3 S5 S7 S9


Fig. No.56

XVI. Train is occupying 9T and 9AT. Relay status for Signal S3 will be previous condition XV.1 S3 S5 S7 S9


Fig. No.57

XVII Train cleared 9T and occupying 9AT only. Signal S3 will display Green, Signal S5 will display double yellow, Signal S7 will display yellow and Signal S9 will display Red aspect.

RelayStatus Relay Status

3 HR 3 ATR 3 DR 3 HECR 3 HHR 3 HHECR 3 DECR 3 RECR 3 TR


31


S1 S3 S5 S7 S9


Fig. No.58

RELAY STATUS OF DIFFERENT TRAIN MOVEMENT

Position of train

S3HR

S3DR

S3HHR

S3 DECR

3TR

3ATR

S3RECR

S3HECR

S3HHECR

REMARK

ON 1 AT S 3 –GON 1AT & 3T

S 3- R AS 3 DECR DROPS

ON 3T S3 –RON 3T & 3AT

--DO--

ON 3 AT ---DO--ON 3AT & 5T

---DO--

ON 5T -----DO-----

ON 5T & 5AT

---- DO-----

ON 5AT S 3-Y

5AT &7T -----DO----ON 7T S 3 –YON 7T & 7AT

---DO--

7 AT S 3-YY, ON 7AT & 9T

---DO--

ON 9T S 3 -YY,ON 9T & 9AT

----DO----

ON 9AT S 3-G


32


CHAPTER 3

MAINTENANCE OF AUTOMATIC SIGNALLING

3.1 To carry out day to day maintenance in Automatic

Signalling section, following maintenance handbook prepared by CAMTECH/Gwalior may be referred.

Name of handbook Publication No.

Colour light signal CAMTECH/S/CLS/1.0

Siemens point machine CAMTECH/S/SPM/1.0

IRS point machine CAMTECH/S/IRSPM/1.0

DC track circuit CAMTECH/S/DCTC/1.0

Power Equipment CAMTECH/S/PQ/1.0

Lead acid battery CAMTECH/S/1-96

Electric lifting barrier CAMTECH/S/ELB/1.0


33


3.2 DO’S and DON’TS

3.2.1 DO’s

As far as possible bulb must be replaced during morning period since mostly bulb fuse during first 5 hours.

Check due date of overhauling of track relay. if due, it should be replaced timely.

Apply glue epoxy on the rail and fish plate of joints to avoid shorting due to iron fillings and iron powder.

Check time delay circuit is working properly.

Always work carefully as train traffic is on higher side in automatic signalling territory.


34


3.2.2 DON’TS

Forget to take the no load current of signal transformer.

Forget to close and lock the back cover after completion of work.

Discharged Battery excessively.

Add impure distilled water and acid in the batteries.

Bypass the regulating resistance of track circuit at any time.

Disturb the antilittering arrangement of track relay.

Forget to give disconnection memo to on duty ASM/CASM at for time of attending failure.

Adjust the track circuit beyond the limit of track circuit parameters.

Commence maintenance work of point without telecommunication with ASM/CASM.

Try to replace any part of the point machine or associated wiring without proper disconnection notice.


35


Annexure IIQ-series Aspect control circuit of a Automatic Stop Signal


3HR 3HHR

3HR 3HHR

3 HHECR

3 DECR

3 HECR

3 RECR

3 DECR

3 DR

3 DR

3 DR

3 DR

3 DECR

3 DR

3 DECR

3 DECR 3 HECR 3 HHECR

3 HR

3 HR

3 HHECR 3 HECR 3 DECR

HHG

DG

HG

RG

1



333

2

maintenece handbook on auto signaling for indian railways

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