Signalling MOD Design Process

Signalling MOD Design Process

Signalling MOD Design Process Design Modification 1. Modifications are only used once installation has commenced. i.e on issue of installation copy. 2. Modification sheets are issued with the following aims: a. Expediency of issue b. Clarity of modification 3. Modification process requires strict configuration control of all modifications made to issued sheets. 4. This is […]

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Railway Signalling Flexible Screened Multi core cable Cable Routes

Railway Signalling Flexible Screened Multi-core cable Cable Routes Production/ Batch tests  The following test will be performed on every manufactured batch of cable. Spark test: • The test procedure shall be as defined in LU specification E4156. The test shall be performed on the conductor and screen insulation during manufacturer. • Voltage withstand and insulation […]

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Railway Signalling Equipment Treadle Presentation

Railway Signalling Equipment Treadle Presentation What is Treadle? A treadle is a mechanical or electrical device that detects that a train axle has passed a particular location. They are used where a track circuit requires re-inforcing with additional information about a train’s location, such as around an automatic level crossing, or in an annunciator circuit, that sounds a warning […]

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Railway Signalling Track Circuits  Closed TC  Open Track Circuit Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit A track circuit is a vehicle detection device in which the running rails form part of an electrical circuit. The boundaries of track circuit are marked by insulation joints on the rail and rails are bonded at rail joints for better conductivity. Uses […]

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Railways Signalling Relays | Shelf type Relays

Railways Signalling Relays | Shelf type Relays

Railways Signalling Relays | Shelf type Relays Relays Relay is an electromagnetic device which is used to convey messages electrically from one circuit to another circuit through a set of contacts (back or front contacts)and works on the principle of electromagnetism. Relays are classified as : According to the source of power applied – DC […]

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Train Protection & Warning System (TPWS) Basic Concept

Train Protection & Warning System (TPWS) Basic Concept

Train Protection & Warning System (TPWS) Basic Concept:- Presentation TPWS is a system designed to stop train: * Passing A Signal At Danger Without Authority. * Approaching A Signal At Danger Too Fast. * Approaching Speed Restriction Too Fast. * Approaching Buffer Stop Too Fast. TPWS consists of two sensors: * Train Stop Sensor (TSS) […]

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