principle & tips.ppt

7/28/2019 Principle & Tips.ppt

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Preparation of Signalling Plan

1) Type of Signalling 2A or Multiple

Aspect

2) Class of Station Class-A, Class-B,

Class-C

3) Standard of Interlocking Std-I, Std-II,

Std-III or MNI


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Type of Lever Frame

Direct Type Bay 5 or 7

Catch Handle Type Bay- 8 or 10


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Method of Numbering

Geographical Method

Group cum geographical Method


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Why Spares are required

Future expansion of yard

Future increase of Interlocking gears

Modification of yard

Insertion of new siding point etc


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Levers Colour

LB- Blue

Signal - Red

Outer/WarnerGreen

Slot Yellow

Point

Black Spare - White


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Essential of Interlocking

1. It must not be possible to take of a running

signal unless the following are ensured not

only in the actual portion of the track onwhich the train has to travel, but also in the

overlap :-


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a) All the points are correctly set

b) All the facing points are locked (at site)

c) All the interlocking level crossing gates

are closed & locked against road traffic.

d) The isolation is ensured.



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2. Once the signal has taken OFF, it must not

be possible to do any of the following

unless the signal has first been put back toON position :-



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a) Alter the position of the relevant points.

b) Unlock the relevant facing points.

c) Unlock & open the relevant level crossing

gate.

d) Disturb the relevant isolation.



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3. It must not be possible to take OFF at the

same time any two fixed signals, which may

lead to any conflicting movements



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iv) Where feasible, the points shall be so

interlocked as to avoid any conflicting

movement.



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METHODS FOR

LOCKING TABLE PREPARATION


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SIGNAL Vs SIGNAL

1) Signal is Released by Signal in advance

[Warner Released by Outer]

2) Signal RELEASES Signal in Rear

[Outer Releases Warner]


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SIGNAL Vs POINT

1) Signal is R/by the point if the point is required

in R/Position [Loop H/Sig R by point]

2) Signal Locks Normal if the Point is required in

N/Position [M/L H/Sig Locks M/L Points]

3) Signal Locks rear point in BOTHWAYS

- for route holding [ Adv Str Lock M/L Pt. B/W]


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SIGNAL Vs LOCK BAR

1) Signal R/by first facing lock bar

[H/Sig R.By 1st Facing L/B]

2) Signal Locks Normal the first trailing

lock bar[M/L Str. Lock 1st L/B]


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SIGNAL Vs LC GATE

1) Signal R/by LC gate in the Route


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SIGNAL Vs SLOT

1) Signal Releases slot in same direction

[Adv Str/ML Str Releases Warner Slot]

2) Signal Locks Normal the opposite slot

[Adv Str locks slot on ML]


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POINT Vs SIGNAL

1) Pt. Locks Normal Signal when Pt.

is in N/Position

2) Pt. RELEASES Signal when it requires

in R/Position


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POINT Vs POINT

1) Pt. Locks Normal the conflicting pt.

[Two Point from M/L Lock each other]

2) More important Pt. RELEASES less

important pt. [Loop line Pt. releases Siding point ]

3) Less important pt. R/by more important

point. [Siding point R/By Loop line Point]


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POINT Vs LOCK BAR

1) Pt. RELEASES Lock bar in case of Trap pt.

[Loop line Pt without sand hump releases LB]

2) Pt. R/by Lock bar in BOTHWAYs in

case of slip siding & Catch Siding

3) Slip siding Pt. R/by Lock bar in either

ways.


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POINT Vs LC GATE

1) Pt. R/by LC Gate in case of siding pt.


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POINT Vs SLOT

1) Pt. Locks Normal the slot if the point

is required in N/Position

2) Pt. Locks Normal the slot in case of

isolation Pt.


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LOCK BARVs SIGNAL

1) 1st. Facing lock bar RELEASES the Signal

2) 1st . Trailing lock bar locks Normal the Sig.


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LOCK BARVs POINT

1) Lock bar locks it points BOTHWAYs

2) Lock bar R/by pt. in case of Trap or

De-railing switch

3) Lock bar RELEASES pt. in case of

Slip/catch siding


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LOCK BARVs SLOT

1)1st. Facing lock bar RELEASES the Slot

2)1st. Trailing Lock bar Locks Normal the

slot.


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LC GATE Vs SIGNAL

1) LC gate releases the Signal


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LC GATE Vs POINT

1) LC gate RELEASES the Siding Pt.


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LC GATE Vs LOCK BAR

NO RELATION


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LC GATE Vs LC GATE

NO RELATTION


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LC GATE Vs SLOT

1) LC gate RELEASES slot

2) LC Gate RELEASES slot through

condition when separate Overlap is there.


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SLOT Vs SIGNAL

1) Slot R.by Signal in same Direction

[Warner Slot R by Adv Str/ML Str]


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SLOT Vs POINT

1) Slot Locks Pt. in Normal which required

in N/Position

2) Slot Locks Normal the Isolation Pt.


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SLOT Vs LOCK BAR

1) Slot R/by 1st facing Lock Bar.


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SLOT Vs LC GATE

1) Slot R/by LC Gate conditionally when

separate overlap is there.


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SLOT Vs SLOT

1) Slot R/by slot in advance in the same direction

2) Slot RELEASES slot in rear in the samedirection.

3) Slot Locks the conflicting slot in Normalposition.

principle & tips.ppt

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