Axle Counters - General Overview

<p>High-speed rail operations. (C)</p> Signup and view all the answers

<p>Implementing a trolley suppression arrangement. (C)</p> Signup and view all the answers

<p>Areas with poor drainage or flood-prone zones. (C)</p> Signup and view all the answers

<p>Installation guidelines and pre-commissioning checklist. (A)</p> Signup and view all the answers

<p>Their operation requires exemptions outlined in working rules. (C)</p> Signup and view all the answers

<p>To protect against damage from moving train parts (D)</p> Signup and view all the answers

<p>2 meters (C)</p> Signup and view all the answers

<p>In different pipes as prescribed (A)</p> Signup and view all the answers

<p>Inbuilt trolley suppression provision (A)</p> Signup and view all the answers

<p>50 mV peak to peak/10 mV rms (B)</p> Signup and view all the answers

<p>Central DC–DC converter of approved type (A)</p> Signup and view all the answers

<p>400 mm (C)</p> Signup and view all the answers

<p>In a relay room or inaccessible location (B)</p> Signup and view all the answers

<p>Verify clearance of the block section with the Assistant Station Master. (B)</p> Signup and view all the answers

<p>With a key that is kept locked in a separate box. (D)</p> Signup and view all the answers

<p>Both the dispatching and receiving stations cooperate in the reset operation. (B)</p> Signup and view all the answers

<p>The movement of the train before and after the reset. (A)</p> Signup and view all the answers

<p>To ensure no operation is accidentally erased. (C)</p> Signup and view all the answers

<p>They ensure private number exchanges are followed properly. (B)</p> Signup and view all the answers

<p>A procedure for piloting the first train after a reset. (A)</p> Signup and view all the answers

<p>The concerned signal cannot be taken off. (D)</p> Signup and view all the answers

<p>50 mV peak to peak (B)</p> Signup and view all the answers

<p>150 mm (D)</p> Signup and view all the answers

<p>To avoid interference pickup (A)</p> Signup and view all the answers

<p>Optical Fibre Cable (OFC) (B)</p> Signup and view all the answers

<p>0.2 V (C)</p> Signup and view all the answers

<p>Dedicated DC-DC converter for each evaluator (D)</p> Signup and view all the answers

<p>An independent power source (C)</p> Signup and view all the answers

<p>At a high level, above the flooding area (B)</p> Signup and view all the answers

<p>Verify that the line for the train is physically clear of any obstruction. (C)</p> Signup and view all the answers

<p>The on duty ASM and another Operating Staff member. (C)</p> Signup and view all the answers

<p>In a locked box secured in the Station Master's office. (C)</p> Signup and view all the answers

<p>Each operation of the reset button in the Train Signal Register. (B)</p> Signup and view all the answers

<p>If laid down procedures for resetting are being followed. (D)</p> Signup and view all the answers

<p>The monitored portion must be free of any vehicle. (D)</p> Signup and view all the answers

<p>A calling-on signal or be piloted per existing rules. (C)</p> Signup and view all the answers

<p>A line verification box (LV box). (C)</p> Signup and view all the answers

<p>Treat it as failed and advise Signalling maintenance staff immediately. (A)</p> Signup and view all the answers

<p>Permanent Way staff (B)</p> Signup and view all the answers

<p>There should be no deviation beyond permissible tolerance. (C)</p> Signup and view all the answers

<p>Use of a Tie Tamper (A)</p> Signup and view all the answers

<p>Work should only be done in a non-operational system. (B)</p> Signup and view all the answers

<p>To ensure accurate count of axle movement. (D)</p> Signup and view all the answers

<p>The Signalling maintenance team (C)</p> Signup and view all the answers

<p>The axle counter shows 'clear' after an operation in the column. (D)</p> Signup and view all the answers

A track device that detects and counts axles of trains passing over the rails.

A component of an Axle Counter system that monitors the counts of train axles and provides indications of the track's status (clear or occupied).

An advanced type of axle counter that can replace track circuits for proving track clearance, especially on bridges.

A system to prevent axle counters from counting the wheels of trolleys.

A signalling system that uses axle counters to control train movements, preventing collisions on sections of track.

A train control system which prevents collisions by keeping trains separated on sections of track.

A set of steps and procedures used to ensure that an Axle Counter system is properly installed and ready for operation, before official use.

Rules and instructions provided by the Original Equipment Manufacturer for the installation of their axle counters.

A system to prevent trolleys from interfering with track devices.

The minimum distance between adjacent axle detectors of different counters must be at least 2 meters (or as per manufacturer's recommendations).

Protects axle detectors from damage by parts of moving trains.

Track side electronic equipment should be placed near axle detectors to minimize cable lengths and be above flood levels.

A board used to terminate incoming cables from axle detectors and evaluators for testing purposes.

Recommendation to lay cables between the axle detector and associated track side electronics in separate conduits, aligning with OEM standards.

Ensure minimum 400 mm sleeper spacing around track devices, ensure secure fitting to avoid vibrations and additional packing of sleepers where necessary.

Powered by a central power supply (DC-DC converter) with a backup battery. Alternatively, remote locations may have a separate supply with low ripple (maximum 50mV peak-to-peak).

Equipment should be installed at a high level, above the flooding level and protected from rain. It should be secured away from signaling relays and sources of electromagnetic interference like industrial machinery.

Each evaluator should have its own DC-DC converter with a battery backup. This improves reliability and availability by reducing dependence on a single power source.

The input power supply should have a maximum ripple of 50 mV peak to peak and 10 mV rms to ensure stable operation of the equipment.

Connections to and from the battery and DC-DC converter should have sufficient current capacity and be secured with lugs for reliable contact, minimizing voltage drop.

Wires connecting the battery, charger, and DC-DC converter should be separated from other wiring and twisted in pairs to prevent interference.

When integrated power supplies are available, the power for the axle counter should be taken from a dedicated DC-DC module.

Redundant train detection systems with independent power sources and cables should be implemented in block sections and vulnerable track areas.

The quad cable or PIJF Telecom Cable used for axle counter communication should be an approved type with specific transmission loss and cross-talk limits.

The process of restoring an axle counter to a functional state after a failure, ensuring the monitored track section is clear of vehicles.

A mechanism that allows the on-duty station staff to reset an axle counter after a fault, provided the track section is clear.

The process of resetting an axle counter involving coordinated actions between the train dispatching and receiving stations.

Designing the axle counter circuitry to prevent unauthorized resetting by either the dispatching or receiving station alone.

The reset box is secured with a key, kept separate from the station master's office, and tracked by a non-resettable counter.

A logbook that documents all axle counter reset operations, movements before and after resets, and other important train signaling information.

Personnel responsible for ensuring that axle counter systems are properly maintained and that procedures like private number exchange are followed.

A set of regulations detailing procedures for resetting axle counters, verifying track clearance, and piloting the first train after a reset.

The process of restoring an axle counter to an operational state after a fault, ensuring safety and preventing train movements until track clearance is confirmed.

A section of track that is controlled by an axle counter, allowing only one train to occupy it at a time.

A collaborative procedure for resetting an axle counter in point zones, loops, and sidings, involving two operating staff members to verify track clearance and operate the reset box.

The process of resetting the axle counter to its initial state, preparing it to count trains passing through the section.

The resetting process for axle counters in main lines and run-through lines requires a preparatory arrangement, ensuring the reset procedure is efficient and safe.

The actively operating Axle Signalling Module (ASM) that constantly monitors and provides status updates of the block section.

A device used to manually restore an axle counter to an operational state after a fault. It requires a key for operation, ensuring controlled access and accountability.

A record of all axle counter reset operations conducted at the station. This log is maintained by the ASM and inspected by Signal and Traffic officials.

After a train has passed through the block section, the axle counter will indicate the section as 'clear' only when the number of axles entering the section ('count in') matches the number of axles leaving the section ('count out').

A section of track leading to a siding or a loop, where trains can be diverted or held temporarily.

The first train allowed to proceed after an axle counter reset may be either received on a calling-on signal or piloted, depending on regulations and track clearance verification.

A reset operation performed only after the responsible ASM is on duty and additional operating staff is present during the process.

The section will be shown as 'clear' only after a train has passed through it and performed the required operations in the axle counter system.

Before allowing trains to proceed after an axle counter reset, it is crucial to verify the physical clearance of the track section, ensuring no obstacles or hazards exist.

Regular maintenance, repair, and inspection of axle counters to ensure their accuracy and reliable operation.