Track Relay and Circuit Maintenance
32 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the minimum shunting value that must be maintained for track circuits?

  • 1.0 ohms
  • 0.5 ohms (correct)
  • 2.0 ohms
  • 0.75 ohms
  • How often should the connection of DC track relays be interchanged?

  • Quarterly (correct)
  • Biannually
  • Monthly
  • Yearly
  • Which component should be checked for dust during the visual inspection of track relays?

  • Armature
  • Contact carriage
  • Contacts (correct)
  • Cover
  • What action should be taken if a defective track relay is discovered?

    <p>Replace it immediately (A)</p> Signup and view all the answers

    What is the recommended lifespan for plug-in type track relays?

    <p>12 years (A)</p> Signup and view all the answers

    Before replacing components in an insulated rail joint, what should be prepared ahead of time?

    <p>Replacement components (C)</p> Signup and view all the answers

    What should be done if there is no gap at the insulated rail joint when replacing an end-post?

    <p>Loosen the rail fastening and pull back the rail (C)</p> Signup and view all the answers

    Which of the following is NOT a visual check of track relays?

    <p>Frequency of usage (C)</p> Signup and view all the answers

    What type of relay should be used for track circuits with a non-RE wooden sleeper in a block?

    <p>QT type 9 ohm (A)</p> Signup and view all the answers

    Which statement about the maintenance of DC track circuits is correct?

    <p>The surface of the rail should be clean and free of foreign materials. (C)</p> Signup and view all the answers

    What is the minimum ballast resistance allowed for track circuits?

    <p>None specified (B)</p> Signup and view all the answers

    For track circuits in the yard, what type of relay should be employed for RE wooden sleepers?

    <p>QT 9 ohms AC immune (D)</p> Signup and view all the answers

    Which of these is NOT a requirement for maintaining DC track circuits?

    <p>Using a single feed for all track circuits (A)</p> Signup and view all the answers

    What should be combined with secondary cells to ensure adequate capacity for feeding track circuits?

    <p>Battery chargers or solar panels (A)</p> Signup and view all the answers

    Which type of sleepers requires QT 9 ohms relay for block tracks?

    <p>Non-RE wooden sleepers (A)</p> Signup and view all the answers

    What resistance should the insulation joints maintain for effective track circuit operation?

    <p>High resistance for effectiveness (C)</p> Signup and view all the answers

    What must be done to ensure electrical conductivity is not established between the rail ends?

    <p>Brush off brake block dust frequently. (B)</p> Signup and view all the answers

    How many sleepers should be packed properly on either side of an insulated rail joint?

    <p>Three (B)</p> Signup and view all the answers

    What indicates that an insulated rail joint may be faulty?

    <p>Change in voltage readings across the track relay terminals. (C)</p> Signup and view all the answers

    What is the purpose of periodic coating with insulating varnish or epoxy?

    <p>To avoid shorting due to brake dust. (A)</p> Signup and view all the answers

    Who is responsible for the installation or replacement of fish plates of Nylon insulation joints?

    <p>Engineering Department (B)</p> Signup and view all the answers

    What should be done to fish bolts after their installation or replacement?

    <p>They should be tightened several times over two weeks. (A)</p> Signup and view all the answers

    What type of clips should be used at Nylon insulation joints to prevent contact with fish plates?

    <p>'J' type pandrol clips (D)</p> Signup and view all the answers

    What action should be taken if insulation for stretcher bars and point rodding is found defective?

    <p>It should be changed immediately. (C)</p> Signup and view all the answers

    What is the maximum allowable ballast resistance in the block section?

    <p>4 ohms per km (C)</p> Signup and view all the answers

    How often should the track circuited portion be jointly inspected by the SSE (Signal) and SSE (P-way)?

    <p>At least once in six months (A)</p> Signup and view all the answers

    What percentage of missing liners for track circuit length should not be exceeded?

    <p>3% (D)</p> Signup and view all the answers

    Which of the following is a requirement for jumper connections?

    <p>Long jumper connections must be secured properly. (C)</p> Signup and view all the answers

    How frequently should voltage readings be taken to check for variations?

    <p>Every 15 rail lengths or less (B)</p> Signup and view all the answers

    What should be done if unusual voltage variations are found?

    <p>Take readings every rail length or inspect each bond. (A)</p> Signup and view all the answers

    During which weather condition should track drainage be given special attention?

    <p>During the rains (D)</p> Signup and view all the answers

    What should be done if defects are found during drainage inspections?

    <p>Notify the SSE/JE (P-Way). (A)</p> Signup and view all the answers

    Flashcards

    Track Circuit Maintenance

    Maintaining track circuits to ensure reliable operation and safety.

    Ballast Resistance

    The electrical resistance of the track ballast.

    Track Relay Types

    Different types of relays used in track circuits.

    Minimum Ballast Resistance

    The lowest acceptable resistance value for the ballast.

    Signup and view all the flashcards

    Track Circuit Feed

    Providing power to the track circuit.

    Signup and view all the flashcards

    Secondary cells

    Approved batteries to power track circuits.

    Signup and view all the flashcards

    Insulating Joints

    High resistance areas in track to prevent current leakage.

    Signup and view all the flashcards

    Rail Surface Cleanliness

    Maintaining a clean rail surface to prevent interference with the track circuit.

    Signup and view all the flashcards

    Insulated Rail Joint Sleepers

    At least three sleepers on either side of an insulated rail joint must be properly packed to ensure good electrical isolation.

    Signup and view all the flashcards

    Fish Bolt Tightening

    Fish bolts should be tightened regularly, especially within the first two weeks after installation to prevent loosening and maintain good contact.

    Signup and view all the flashcards

    Metal Flow at Joints

    Metal flow at the rail-table creates a lip and sharp burrs, which must be removed to prevent short circuits.

    Signup and view all the flashcards

    Brake Block Dust

    Brake dust accumulating on the joint can cause conductivity, so it needs to be brushed off regularly.

    Signup and view all the flashcards

    Nylon Insulation Joint Maintenance

    Opening and fixing nylon insulation joints is the responsibility of the engineering department, not S&T staff.

    Signup and view all the flashcards

    Pandrol Clip at Nylon Joints

    Special pandrol clips are needed at nylon joints to avoid contact with the fish plate and prevent short circuits.

    Signup and view all the flashcards

    Insulating Varnish/Epoxy

    Periodic coating with insulating varnish/epoxy helps prevent shorts caused by brake dust accumulation.

    Signup and view all the flashcards

    Faulty Insulated Joint Detection

    A faulty insulated joint can be detected by checking voltage readings across the track relay terminals.

    Signup and view all the flashcards

    Track Circuit Shunting Value

    The electrical resistance of a track circuit, measured in ohms. It should not drop below 0.5 ohms.

    Signup and view all the flashcards

    DC Track Relay Inspection Frequency

    DC track relays should be visually inspected quarterly by JE/SSE.

    Signup and view all the flashcards

    DC Track Relay Inspection Items

    Visual checks include armature and contact carriage movement, wiping of contacts, arcing, pitting, charring, dust, electroplating, corrosion, cracks, fungus and cover charring (plug-in relays).

    Signup and view all the flashcards

    Defective Relay Action

    If a track relay is found defective, immediately replace it and report the defect to ASTE/DSTE/Sr.DSTE.

    Signup and view all the flashcards

    Plug-in Relay Replacement

    Plug-in type track relays should be replaced after 12 years, or sooner if necessary based on condition and use.

    Signup and view all the flashcards

    Insulated Rail Joint Maintenance

    Maintain Insulated Rail Joints (IRJs) according to the RDSO/Lucknow Booklet STS/E/IRJ/IMI.

    Signup and view all the flashcards

    IRJ Replacement Parts

    Keep replacement components ready while removing Insulated rail joints, matched to the rail sections.

    Signup and view all the flashcards

    End-post Replacement (IRJ)

    For replacing an end-post on an Insulated Rail Joint with no gap, loosen rail fastenings, pull back the rail, and insert the end-post between the rail ends.

    Signup and view all the flashcards

    Voltage Reading Frequency

    Voltage readings should be taken at least every 15 rail lengths to check for gradual voltage changes. This helps identify potential bonding issues.

    Signup and view all the flashcards

    Defective Bonding Detection

    If voltage readings show unusual variations, inspect the bonding at each rail length to find the defective bonding. This ensures a reliable electrical connection.

    Signup and view all the flashcards

    Jumper Connection Inspection

    Jumper connections, which bridge gaps in the track circuit, should be checked regularly for wear and proper securing. This ensures a continuous electrical path.

    Signup and view all the flashcards

    Track Drainage Importance

    Good drainage is crucial to prevent water from affecting the track circuit, especially during rain. Defects must be reported promptly.

    Signup and view all the flashcards

    Joint Inspection of Track

    Signal and track maintenance teams should inspect the track circuit together at least twice a year. This ensures both aspects (electrical and track) are in good shape.

    Signup and view all the flashcards

    Train Shunt Test Frequency

    A train shunt test should be done every three months and whenever the track circuit is adjusted. This ensures the track circuit is working properly.

    Signup and view all the flashcards

    Test Points for Train Shunt

    The train shunt test should be performed at both the relay end and other parts of the track with parallel circuits, like turnouts and crossovers.

    Signup and view all the flashcards

    Study Notes

    Track Relay Specifications

    • Standard track relay types (QT, etc.) listed with associated technical specifications.

    Track Feed

    • Approved secondary cells needed for track circuits.
    • Battery chargers/solar panels are required.
    • Separate feed for each track circuit is a necessity.

    DC Track Circuit Maintenance

    • Power feed and track connections need continuous maintenance to ensure they remain connected to their respective track circuits.
    • Relay and track connections and rail bonds need consistent joining.
    • Ballast resistance must maintain a high value, and not fall below the prescribed minimum values.
    • The limiting resistance of the circuit must be as high as possible.
    • Insulating joints' resistance must be high.
    • Rail surfaces should be clean and free of foreign matter including dust and sand.
    • Proper electrical energy feeding during wet and dry conditions is important, not to over or under energize the system( minimum 0.5 ohms or no overenergizing).
    • Track sleepers (concrete or wooden) type do not require different circuit management.
    • Proper relay-switching configuration to prevent long term magnetism.

    DC Track Relays

    • Pick-up/drop-away values must stay within manufacturer-specified limits.
    • Regular visual inspection (quarterly) by technicians.
    • Inspection should include: armature movement checks, contact carriage wiping, contact arcing/pitting/charring, dust assessment, electrode plating condition, corrosion/breakage/cracks evaluation, presence of fungus near contacts (specific for plug-in relays) and thorough correctness assessment of labels along with present seals.
    • Defective relays should be promptly replaced, and the cause documented to supervisory staff.
    • Proper maintenance schedule and replacement criteria (12 years of usage, or if warranted by condition).

    Insulated Rail Joints Inspection

    • Insulated rail joints (IRJs) upkeep procedure must be consistent with booklet guidelines.
    • Necessary components for replacement should be prepared.
    • Loosening rail fastening and pulling back rails for end-post replacement when there is no gap.
    • At least three sleepers on either side of the insulated rail joint must be securely packed.

    Fish Bolts and Rail Integrity

    • Keep fish bolts tight, tightening nuts multiple times following installation or replacement.
    • Clean metal flow around rail tables to prevent short circuiting possibilities by sharp burrs.
    • Brush off dust and debris from brake block surfaces to prevent short circuits.
    • Pandrol clips ('J' type) must be provided at insulated joints and avoid contact with fish plates.
    • Applying insulating varnish/epoxy coating to insulated joints and glued joints is needed to prevent short circuits (due to dust).
    • Detect insulated joint faults (by noting voltage changes across relay terminals when the adjacent track circuit is shunted/disconnected).

    Stretcher Bars and Point Connections

    • Check the insulation integrity of stretcher and point rodding connections regularly(inspections periodic and ensure replacing bad insulation.)

    Bond Wires/Rope Wires

    • Bonds must be regularly inspected, and painted if excessive corrosion is detected.

    Jumper Connections

    • Regularly inspect and maintain jumper connections.
    • Long jumper connections must be properly secured.

    Ballast Resistance

    • Minimum ballast resistance must maintain at least 2 ohms/km (station yard) and 4 ohms/km (block section).

    Drainage

    • Proper track drainage during rain is important, defect reports to appropriate staff are needed.

    Track Joint Inspection

    • Regular joint inspections (semi annually) by signal and permanent way inspectors.

    Train Shunt Testing

    • Periodic train shunt testing (quarterly, and upon any track adjustments or modifications, parallel areas of tracks).

    Track Circuit Test Cards

    • Required track circuit test cards must be documented (at least six-monthly) by signal engineers.

    Batteries and Feed Apparatus

    • Track feed batteries/apparatu must be properly maintained.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Description

    This quiz covers the specifications of track relay types, including the necessary technical criteria for their operation. It also delves into the maintenance of DC track circuits, focusing on power feeds, connections, and the importance of proper electrical energy feeding. Test your knowledge on these essential components of track circuitry.

    More Like This

    Track and Field Vocabulary Quiz
    20 questions
    Track and Field Terms Flashcards
    40 questions

    Track and Field Terms Flashcards

    BeneficialThermodynamics avatar
    BeneficialThermodynamics
    Track and Field Quiz
    10 questions

    Track and Field Quiz

    InvaluableBauhaus avatar
    InvaluableBauhaus
    Use Quizgecko on...
    Browser
    Browser