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CATECH/2000/S/AS/1.0
Maintenance handbook on March.2001Automatic signalling
1
CHAPTER 1
AUTOMATIC SIGNALLING
1.1 INTRODUCTION
Automatic block working is a system of train working inwhich movement of the train is controlled by the automaticstop signal. These signals are operated automatically by thepassage of trains in to through and out of the automaticsignalling sections.
1.2 FEATURES
Automatic block system
The line shall be provided with continuous trackcircuiting or axle counters.
Block section is divided into various small-signalling sections.
Each signalling section is governed by anAutomatic stop signal.
Each signalling section is further divided intoberthing and overlap track circuit.
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1.3 ADVANTAGES
Line capacity increases.
Less dependence on human agencies.
Automatic stop signal can be passed at `ON' position asper General Rule 9.02 , after stopping one minute by dayand 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.
Letter ‘A’ inblack on whitecircular disc
Fig no.1
A
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Whiteilluminatedletter ‘A’ againstblackbackground
Numbering of signals -Normally odd nos. for up directionand even nos. for down direction.
Automatic stop signal is provided with `A' marker.
Semi Automatic Stop Signal
Semi Automatic stop signal can work asa manual stop signal/ Automatic stopsignal.
Semi Automatic signal is providedwith illuminated ‘A’ sign.
Illuminated 'A' sign will lit whensignal is working as Automatic stopsignal.
Illuminated ‘A’ signwill not lit whensignal is working asa manual stopsignal.
Controlled by king lever/ knob/switch.
Cascading arrangement- When a colour light signal isshowing a particular aspect and its lamp of that aspectfuses then signal becomes blank. To avoid this condition,cascading or cutting in arrangement in the lampcontrolling circuit is provided in such a way that if a lampfuses the signal can be restored to next restrictive aspect.Example. If green lamp fuses (when signal is displayingclear aspect), then the more restrictive yellow aspect can
Fig. No.2
A
CATECH/2000/S/AS/1.0 4
be lit or if yellow lamp fuses (when signal is displayingcaution aspect) then red aspect can be lit.
Red lamp protection: It is provided to avoid the passingof train in no light condition of a signal. In this case therear signal will show ON aspect, when signal ahead isshowing no light.
1.5 LEVEL CROSSING GATE IN AUTOMATIC
Maintenance handbook on March.2001Automatic signalling
SIGNALLING SECTION :
LEVEL CROSSING GATE:
In Automatic signalling area, the signal controllingmovement over LC gate are semi-automatic signals. SemiAutomatic gate signal will be in "ON" position, when gateis open for road traffic.
Level Crossing Gate signal (when no point in the route)
Yellow circular disc with ‘G’ letter in black andilluminated ‘A’ letter against black background areprovided.
CATECH/2000/S/AS/1.0 5
Illuminated “A” sign of the Semi-Automatic gate signal will lit when thelevel crossing gate is closed against theroad traffic and signal is working as anAutomatic stop signal.
Letter ‘G’ in black on yellowcircular disc
white illuminated letter ‘A’against black background
A G
Fig no. 3
Maintenance handbook onAutomatic signalling
March.2001
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Level Crossing Gate signal (whenpoints are in the route)
Illuminated ‘A’ and ‘AG’ sign areprovided on gate signal..
Illuminated “A” sign will lit when levelcrossing is closed against road trafficand points in the route are correctly setand locked and signal is working as anAutomatic stop signal.
Illuminated ‘AG’ sign will lit whenpoints in the route are correctly set andlocked and LC gate is defective andsignal is working as an Automatic stopsignal.
1.6 Lamps mostly used in colour light signal aretabulated below:
SR.NO.
REF.TYPE
RATINGVOLT/WATT
PURPOSE
1. SL18 12V/24W 2 pole single filament for OFFaspect.
2. SL 21 12V/33W 2 pole double filament for ONaspect.
3. SL33 110V/25W 2 pole single filamentdirection type route indicators.
4. SL35 A 12V/24W Triple pole double filament
A AG
Fig no. 4
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Maintenance handbook on March.2001Automatic signalling
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parallel for OFF aspect.
5. SL35 B 12V/33W Triple pole double filament inparallel of same capacity forON aspect.
CHAPTER 2
AUTOMATIC SIGNALLING CIRCUITSAutomatic 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 Autolocation )
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 greenaspect. The relay status for signal S3 shall be as under:
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPR
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S3 DECR S3 DHHECPR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
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S1 S3 S5
1T 1AT 3T 3AT 5T 5AT Fig No.6
II. The train passes signal S3 and occupies 3T (Train isoccupying 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 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
S1 S3 S5
1T 1AT 3T 3AT 5T 5AT Fig No.7
III. The train has cleared 1AT and occupied 3 T only. Therelay status for signal S3 shall be same as previouscondition II.
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S1 S3 S5
1T 1AT 3T 3AT 5T 5AT Fig No.8
IV. The train occupies 3T and 3AT. The relay status forsignal S3 shall be as under:
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
S1 S3 S5
1T 1AT 3T 3AT 5T 5AT Fig No.9
V. The train has cleared 3T and occupied 3AT only. The relay status for signal S3 shall be as under :
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
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S1 S3 S5
1T 1AT 3T 3AT 5T 5ATFig No.10
VI. The train passes signal S5 and occupies 5T (Train is on3AT and 5T). Signal S5 will show red aspect. The relaystatus for signal S3 shall be same as previous conditionV.
S1 S3 S5
1T 1AT 3T 3AT 5T 5AT
Fig No.11 VII. The train has cleared 3AT and on 5T only. The relay
status for signal S3 shall be as under :
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
CATECH/2000/S/AS/1.0 12
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). Therelay status for signal S3 shall be same as previouscondition VII.
S3 S5 S7 S9
5AT 7T 7AT 9T ig No.13
1AT 3T 3AT 5T F
d occupies 5AT only. Signal S3pect. The relay status for signal
IX. Train has cleared 5T anwill display yellow as
Maintenance handbook on March.2001Automatic signalling
S3 shall be as under :
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
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Fig No.14
X. The train passes signal S7 and occupies 7T (train is on5AT and 7T). Signal S7 shows red aspect. The relaystatus for Signal S-3 shall be same as previouscondition 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 previouscondition IX .
S3 S5 S7 S9
1AT 3T 3AT 5T 5AT 7T 7AT 9T Fig No.16
XII. Train occupies 7AT (train is on 7T and 7AT). The relaystatus for Signal S-3 shall be same as of condition IX .
S3 S5 S7 S9
1AT 3T 3AT 5T 5AT 7T 7AT 9T
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S3 S5 S7 S9
1AT 3T 3AT 5T 5AT 7T 7AT 9T Fig No.17
XIII. Train has cleared 7T and occupies 7AT only. SignalS3 will display Double Yellow aspect and signal S5will display yellow aspect. The relay status for signalS3 shall be as under :
Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR SDRS3 HECR S3 PR SBRS3 HHECR S3 DECPR TPRS3 DECR S3 DHHEPCR ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
S3 S5 S7 S9
1AT 3T 3AT 5T 5AT 7T 7AT 9T Fig No.18
XIV The train passes signal S9. Signal S9 shows red aspect.(Train is on 7AT and 9T). The relay status for Signal S3shall be same as previous condition XIII .
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S3 S5 S7 S9
1AT 3T 3AT 5T 5AT 7T 7AT 9T Fig No.19
XV. Train has cleared 7AT and occupies 9T only. Therelay status for signal S-3 shall remain same asprevious 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). Therelay status for Signal S-3 shall remain same asprevious 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. SignalS-3 will display Green aspect, signal S-5 will displaydouble yellow aspect and signal S-7 will displayyellow aspect. The relay status for signal S-3 shall beas under :
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Relay Status Relay Status Relay StatusS3 RECR S3 HHATPR S3 DRS3 HECR S3 PR S3 BRS3 HHECR S3 DECPR 3 TPRS3 DECR S3 DHHEPCR 3 ATPRS3 HATPR S3 HECPRS3 TPSR S3 HHRS3 DATPR S3 TCR
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9ATFig No.22
RELAY STATUS FOR DIFFERENT TRAIN MOVEMENT INAUTOMATIC SIGNALLING
Posi
tion
ofTr
ain
S3 R
ECR
S3 H
ECR
S3 H
HEC
R
S3 D
ECR
S3 H
ATP
R
S3 T
PSR
S3 D
ATP
R
S3 H
HA
TPR
S3 P
R
S3 D
ECPR
S3 D
HH
ECPR
S3 H
ECPR
S3 H
HR
S3 T
CR
S3 D
R
S3 B
R
3 TP
R
3 A
TPR
Rem
arks
1AT ↓ ↓ ↓ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↓ ↑ ↑ ↑ ↑ S3-G
1AT/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-Y
5AT/7T
↓ ↑ ↓ ↓ ↑ ↑ ↓ ↓ ↑ ↓ ↓ ↑ ↓ ↓ ↓ ↑ ↑ ↑ S3-Y
7T ↓ ↑ ↓ ↓ ↑ ↑ ↓ ↓ ↑ ↓ ↓ ↑ ↓ ↓ ↓ ↑ ↑ ↑ S3-Y7T/7AT
↓ ↑ ↓ ↓ ↑ ↑ ↓ ↓ ↑ ↓ ↓ ↑ ↓ ↓ ↓ ↑ ↑ ↑ S3-Y
7AT ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↑ ↑ ↑ S3-YY
7AT/9T
↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↑ ↑ ↑ S3-YY
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9T ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↑ ↑ ↑ S3-YY9T/9AT
↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↑ ↑ ↑ S3-YY
9AT ↓ ↓ ↓ ↑ ↓ ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↓ ↑ ↑ ↑ ↑ S3-G
(b) Circuit with Main Signal GroupS1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.23 I. When the train is on 1 AT and signal S3 is showing
green aspect. The relay status for signal S3 shall be asunder:
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 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 isoccupying 1AT and 3T). Signal S3 will show red aspect.The relay status for signal S3 shall be as under:
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4
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S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.25 III. 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
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.26 IV. 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 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.27 V. The train has cleared 3T and occupied 3AT only. The
relay status for signal S3 shall be as under :
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Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.28 VI. The train passes signal S5 and occupies 5T (Train is
on 3AT and 5T). Signal S5 will show red aspect. Therelay status for signal S3 shall be as under :
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.29 VII. The train has cleared 3AT and on 5T only. The relay
status for signal S3 shall be as under :
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPR
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S3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.30 VIII. The train occupies 5AT. (Train is on 5T and
5AT). The relay status for signal S3 shall be asprevious condition VII.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.31 IX. Train has cleared 5T and occupies 5AT only. Signal
S3 will display Yellow aspect. The relay status forsignal S3 shall be as under :
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPRS1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.32 X. The train passes signal S7 and occupies 7T (train is on
5AT and 7T). Signal S7 shows red aspect. The relay
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status for Signal S-3 shall be same as previouscondition IX.
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.33 XI. The train has cleared 5AT and occupies 7T only. The
relay status for signal S3 shall remain same asprevious condition X.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.34 XII. Train occupies 7AT (train is on 7T and 7AT).The
relay status for Signal S-3 shall remain same asprevious condition XI.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.35 XIII. Train has cleared 7T and occupies 7AT only. Signal
S3 will display Double Yellow aspect. The relaystatus for signal S3 shall be as under :
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR3S3 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.36
XIV. The train passes signal S9. Signal S9 shows redaspect. (Train is on 7AT and 9T). The relay status forSignal S3 shall remain same as previous conditionXIII.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.37 XV. Train has cleared 7AT and occupies 9T only. The
relay status for signal S-3 shall remain same asprevious condition XIV.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.38 XVI. Train occupies 9AT ( train is on 9T and 9AT). The
relay status for Signal S-3 shall remain same asprevious condition XV.
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1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.39 XVII. Train has cleared 9T and occupies 9AT only. Signal
S-3 will display Green aspect. The relay status forsignal S-3 shall be as under :
Relays Status Relays Status Relays StatusS3 RE(Mn)CR S3 GPR1 S3 GPR33 HECR S3 GR2 S3 GR4S3 DECR S3 RE(Mn)CPR S3 HHECPRS3 GYR S3 DECPR 3 TPRS3 GLSR S3 GR3 3 ATPRS3 GR1 S3 HECPR
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig No.40RELAY STATUS OF DIFFERENT TRAINMOVEMENT IN AUTO. SIGNALLING
Posi
tion
of T
rain
S3 R
E(M
n)C
R
S3 H
EC
R
S3 D
EC
R
S3 G
YR
S3 G
LSR
S3G
R1
S3G
PR1
S3G
R2
S3R
E(M
n)C
PR
S3D
EC
PR
S3G
R3
S3H
EC
PR
S3G
PR3
S3G
R4
S3H
HE
CPR
3TPR
3AT
PR
Rem
arks
1AT ↓ ↓ ↑ ↓ ↓↑ ↑
↑↓ ↑ ↑ ↓ ↑
↓↓ ↑ ↑
S3-G
1AT/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-Y
↓ ↑ ↓ ↓ ↓ ↑ ↓ S3-Y
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5AT/7T
↑ ↑ ↓ ↓ ↓ ↓ ↓ ↓ ↑ ↑
7T ↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↓ ↓
↓↓ ↑ ↑
S3-Y
7T/7AT
↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↓ ↓
↓↓ ↑ ↑
S3-Y
7AT ↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↑ ↓
↑↑ ↑ ↑
S3-YY
7AT/9T
↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↑ ↓
↑↑ ↑ ↑
S3-YY
9T ↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↑ ↓
↑↑ ↑ ↑
S3-YY
9T/9AT
↓ ↑ ↓ ↓ ↓↑ ↑
↑↓ ↓ ↓ ↑ ↓
↑↑ ↑ ↑
S3-YY
9AT ↓ ↓ ↑ ↓ ↓↑ ↑
↑↓ ↑ ↑ ↓ ↑
↓↓ ↑ ↑
S3-G
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 Siemensmain signal group is shown in Annexure I and atypical signalling circuit using Q series relays isshown in Annexure II.
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Cascading / cutting in arrangement-
Relay status Aspect
I. GR1 AND GR2 ↑ DECR↓ Y II. GR1↑, GR2↑, GR3↑, GR4↓ G III. GR1↑, GR2↑, GR4↑, GR3↑ YY IV. HECR↑, HHECR↑, DECR↓ R
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2.2 Q series type
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.41 I. Train is on 1 AT and signal no. S 3 is showing green
aspect. The relay status for signal S3 will be as givenbelow:
Relay Status Relay Status3 HR 3 ATR3 DR 3 HECR3 HHR 3 HHECR3 DECR 3 RECR3 TR
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.42 II. Train has occupied 1 AT and 3T-signal S3 will show Red
aspect and its relay status will be as given below:
Relay Status Relay Status3 HR 3 ATR3 DR 3 HECR3 HHR 3 HHECR3 DECR 3 RECR3 TR
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.43 III. 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
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.44 IV. 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
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.45 V. 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
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.46 VI. Now train is occupying 3AT and 5T, signal S5 will show
red aspect. Relay status for signal S3 will be same asabove as per previous condition V.
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.47 VII. Train cleared 3AT and occupying 5T only. Relay status
for signal S3 will be same as above as previous conditionVI except 3 ATR .
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.48 VIII. 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
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.49IX. Train cleared 5T and occupying 5AT only. Signal S3 will
display yellow aspect. Relay status for signal S3 will besame as given below
Relay Status Relay Status3 HR 3 ATR3 DR 3 HECR3 HHR 3 HHECR3 DECR 3 RECR3 TR
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.50
X. Train is occupying 5AT and 7T. Signal S7 will showdanger/red aspect. Relay status for signal S3 will besame as above.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.51
XI. Train cleared 5AT and occupying 7 T. Relay status forsignal S3 will be same as previous condition X.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.52
XII. Train is occupying 7T and 7AT. Relay status for signal S3 will be same as previous condition XI.
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.53
XIII. Train cleared 7T and occupying 7 AT. Relay status forSignal S3 will be changed. Signal S-3 will display doubleyellow and S-5 will display yellow.
3HHR ↑ 3HHECR ↑
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.54XIV. Train is occupying 7AT and 9T. Signal S9 will display
Red aspect and relay status for S3 will be previouscondition XIII.
S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.55
XV. Train cleared 7AT and occupying 9T only. Relaystatus for S3 will be previous condition XIV.
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.56XVI. Train is occupying 9T and 9AT. Relay status forSignal S3 will be previous condition XV.1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.57XVII Train cleared 9T and occupying 9AT only. Signal S3will display Green, Signal S5 will display double yellow,Signal S7 will display yellow and Signal S9 will display Redaspect.
RelayStatus Relay Status
3 HR ↑ 3 ATR ↑3 DR ↑ 3 HECR ↓3 HHR ↓ 3 HHECR ↓3 DECR ↑ 3 RECR ↓3 TR ↑
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S1 S3 S5 S7 S9
1 T 1AT 3T 3AT 5T 5AT 7T 7AT 9T 9AT
Fig. No.58
RELAY STATUS OF DIFFERENT TRAINMOVEMENT
Positionof train S3
HR
S3DR
S3HHR
S3DECR
3TR
3ATR
S3
RECR
S3
HECR
S3
HHECR
REMARK
ON 1 AT ↑ ↑ ↓ ↑ ↑ ↑ ↓ ↓ ↓ S 3 –GON 1AT& 3T
↓ ↓ ↓ ↓ ↓ ↑ ↑ ↓ ↓ S 3- R AS 3 DECRDROPS
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
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CHAPTER 3
MAINTENANCE OF AUTOMATICSIGNALLING
3.1 To carry out day to day maintenance in Automatic
Signalling section, following maintenance handbookprepared 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
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3.2 DO’S and DON’TS
3.2.1 DO’s
As far as possible bulb must be replaced duringmorning period since mostly bulb fuse during first5 hours.
Check due date of overhauling of track relay. ifdue, it should be replaced timely.
Apply glue epoxy on the rail and fish plate ofjoints to avoid shorting due to iron fillings and ironpowder.
Check time delay circuit is working properly.
Always work carefully as train traffic is on highersi in automatic signalling territory.
dee handbook on March.2001ignalling
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3.2.2 DON’TS
Forget to take the no load current of signaltransformer.
Forget to close and lock the back cover aftercompletion of work.
Discharged Battery excessively.
Add impure distilled water and acid in the batteries.
Bypass the regulating resistance of track circuit at anytime.
Disturb the antilittering arrangement of track relay.
Forget to give disconnection memo to on dutyASM/CASM at for time of attending failure.
Adjust the track circuit beyond the limit of trackcircuit parameters.
Commence maintenance work of point withouttelecommunication with ASM/CASM.
Try to replace any part of the point machine orassociated wiring without proper disconnectionnotice.
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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