Wiring and Relay Racks Specifications
24 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 size of single strand wire should be used for connections to circuit breakers?

  • 0.75 sq.mm
  • 1 mm
  • 1.6 sq.mm (correct)
  • 1.5 sq.mm (correct)

What is the recommended method for wiring relay to relay on the same rack?

  • Direct without intermediaries (correct)
  • Using terminals
  • Using tag blocks
  • Inserting multiple connectors

How much additional capacity should relay racks have for future expansion?

  • 15% (correct)
  • 10%
  • 25%
  • 20%

How should fuses be grouped to minimize impact on train operation when one blows?

<p>Group for minimal repercussion (C)</p> Signup and view all the answers

What type of fuses are recommended to provide a visual indication when blown?

<p>Non-deteriorating type fuses (D)</p> Signup and view all the answers

What should be included to identify the terminals and tags for circuits?

<p>Identification markers (C)</p> Signup and view all the answers

What must be ensured for the arrangement of cartridge fuse links?

<p>Approved type (D)</p> Signup and view all the answers

What facilitates fault localization in circuits?

<p>Fuses grouped in cabins and locations (C)</p> Signup and view all the answers

For which signalling installations is air conditioning provided without regard to the number of routes?

<p>Electrical interlocking installations (B)</p> Signup and view all the answers

What is a requirement for air conditioning in signalling installations with less than 100 routes?

<p>It is optional based on conditions like dust or temperature (D)</p> Signup and view all the answers

What type of automatic system may be provided at all stations regardless of routes?

<p>Automatic Fire Detection and Alarm System (B)</p> Signup and view all the answers

Which equipment is required to be kept in the power supply equipment room?

<p>Firefighting equipment (D)</p> Signup and view all the answers

Who is responsible for the provision and maintenance of air conditioning systems?

<p>The Electrical department (C)</p> Signup and view all the answers

When can the Automatic Fire Suppression System be provided at stations with fewer than 400 routes?

<p>With the approval of the competent authority (D)</p> Signup and view all the answers

What type of earthing should be provided for control panels and power supply equipment?

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

What must be provided to log data at Relay Interlocking Installations?

<p>Data Logger (A)</p> Signup and view all the answers

What is the minimum size of a single core wire that can be used for internal wiring?

<p>1 mm (B)</p> Signup and view all the answers

Which type of conductor is primarily used for internal wiring of relay racks?

<p>Plain annealed copper conductors (C)</p> Signup and view all the answers

What type of insulation is required for the wiring in the cabin and other locations?

<p>PVC insulated unarmoured (C)</p> Signup and view all the answers

For connections to plug-in non-proved type relays, which wire specification is mandated?

<p>16/0.20 mm flexible wire (B)</p> Signup and view all the answers

What should be done to cable entry arrangements after wiring is completed?

<p>Plug and seal them with a suitable compound (A)</p> Signup and view all the answers

Which conductor size is required for rack to rack wiring?

<p>1/0.6 mm multi-core cable (A)</p> Signup and view all the answers

What is the requirement for cable terminations in relay installations?

<p>Terminate on eyelets/lugs/receptacles (B)</p> Signup and view all the answers

What type of blocks should all wiring be terminated on?

<p>Approved type terminal blocks/tag blocks (A)</p> Signup and view all the answers

Flashcards

Relay Rack Wiring Materials

Relay racks use annealed copper conductors with PVC insulation, specifically 1100V grade, unless otherwise specified.

Single Core Conductor Size

The size of a single-core wire used in relay racks is 1mm.

Multi-Core Conductor Sizes

Multi-core wires in relay racks can have either 1mm or 0.6mm cores.

Flexible Insulated Wire Size

Flexible insulated wire for relay connections is 16/0.20mm.

Signup and view all the flashcards

Flexible Multi-Strand Wire Size

Flexible multi-strand wire size is 3/0.75 mm.

Signup and view all the flashcards

Rack-to-Rack Wiring Cable

Rack-to-rack wiring typically uses multi-core cables with 1/0.6mm or 16/0.2mm single cores, adhering to specifications.

Signup and view all the flashcards

Wiring Termination Methods

Wiring connections use eyelets, lugs, or receptacles, unless otherwise specified.

Signup and view all the flashcards

Non-Proven Relay Wire

Connections to non-approved relays utilize flexible wire of size 16/0.20 mm.

Signup and view all the flashcards

Relay Rack Wiring: Direct Connections

Relay-to-relay wiring on the same rack should be direct, avoiding intermediaries like tag blocks or terminals whenever possible.

Signup and view all the flashcards

Relay Rack Identification

Each terminal on a relay rack must have an identification marker to easily identify the circuits it's connected to.

Signup and view all the flashcards

Relay Rack Capacity

Relay racks must have enough space for future expansion, at least 15% of the current equipment.

Signup and view all the flashcards

Relay Rack Documentation

Charts detailing the position of relays on racks, contact analysis (used vs. spare), must be kept in the relay room.

Signup and view all the flashcards

Fuses: Non-Deteriorating Type

Cartridge-type fuses should be non-deteriorating, meaning they don't degrade over time.

Signup and view all the flashcards

Fuse Colour Coding

Screw-cap cartridge fuses must be color-coded for different current ratings to prevent accidental misplacement.

Signup and view all the flashcards

Fuse Group Visibility

Fuse groups should be arranged so that a blown fuse does not significantly disrupt train operation.

Signup and view all the flashcards

Terminal Block Isolation

Terminal blocks and tag blocks must have suitable links allowing for isolation of the two sides of the circuits.

Signup and view all the flashcards

Vital circuit fuse

A special type of fuse used in crucial circuits that automatically switches to a backup power source in case of a failure. This ensures continuous operation.

Signup and view all the flashcards

Air Conditioning in Signaling Installations

Air conditioning is generally recommended for signaling installations with over 100 routes. For E.I installations, it's suggested regardless of the number of routes to enhance reliability.

Signup and view all the flashcards

Air Conditioning for Smaller Installations

Air conditioning may be considered for installations with fewer than 100 routes, especially if they are in dusty environments, near factories releasing harmful fumes, or in regions with extreme temperatures.

Signup and view all the flashcards

AC Equipment Maintenance

Air conditioning units used in signaling installations are the responsibility of the Electrical department. They are connected to the local power supply, and the switch is located outside the relay room.

Signup and view all the flashcards

Fire Detection and Alarm System

A fire detection system is recommended for all signaling stations, irrespective of the number of routes.

Signup and view all the flashcards

Firefighting Equipment

Firefighting equipment should be kept in the power supply equipment room for quick and easy access in case of emergencies.

Signup and view all the flashcards

Earthing for Control Panel

Proper earthing should be provided for all control panels, power supplies, switchboards, transformers, inverters, and other equipment.

Signup and view all the flashcards

Study Notes

Wiring and Relay Racks

  • Wiring in equipment must follow IRS specification No. S 23.
  • Wiring in cabins and locations must be neat and accessible for maintenance.
  • Wiring terminations use approved terminal blocks or tag blocks.
  • Cable entry arrangements must be adequate, protect wires, and sealed with compound.
  • Relay rack internal wiring uses plain annealed copper conductors, PVC insulated unarmoured flame retarding type (1100 V grade) unless otherwise specified.
  • Conductor sizes vary by type:
    • Single core: 1 mm
    • Multi-core (each core): 1 mm, 0.6 mm
    • Flexible insulated wire: 16/0.20 mm, 3/0.75 mm
    • Flexible multi-strand wire: [size not specified]
  • Rack-to-rack wiring uses multi-core cable (1/0.6 mm or 16/0.2 mm).
  • Wiring connections use eyelets, lugs or receptacles unless otherwise permitted.
  • Relay connections (plug-in, proved-type) use flexible wire (16/0.20 mm) or single-strand multi-core cable (0.6/1 mm).
  • Connections to tag blocks/indicators use single strand wire (1 mm).
  • Connections to circuit breakers/lever locks use single strand wire (1.5/1.6 sq mm).
  • Relay-to-relay wiring on the same rack should be direct without intermediaries.
  • Cartridge fuse types should be non-deteriorating, different colors for different current ratings, and non-interchangeable.
  • Fuse grouping minimizes train operation impacts.
  • Fuse blowing should visually signal a fault.
  • Circuits grouped for ease of fault localization.
  • Fuses easily replaceable without interference.
  • Cartridge fuse links and terminal blocks/tag blocks must be approved types.
  • Terminal boards have links for circuit isolation.
  • Vital circuit fuse auto change-over systems are provided.

Power Supply Arrangements

  • Power supply systems follow specifications in Chapter 16.

General Arrangements

  • Air conditioning may be provided for installations with more than 100 routes or in specific conditions, such as environments with dust, fumes, or extreme temperatures, with PCSTE/PCEE agreement.
  • AC equipment maintained by the Electrical department and connected with local power.
  • "Automatic Fire Detection and Alarm System" and potentially "Automatic Fire Suppression System" provided at stations, depending on the number of routes.
  • Firefighting equipment kept in power supply rooms.
  • Standard earthing for all control panel equipment.
  • Communication between rooms and locations provided.
  • Lightning and surge protection, and earthing, follow Section 5.

Testing and Commissioning

  • Indoor wiring testing and simulation testing of field gears (track circuits, signals) performed before system operation.
  • System testing and commissioning follow parameters in Annexure 21-A2.

Studying That Suits You

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

Quiz Team

Related Documents

Section 3: Installation of Relay Interlocking PDF

Description

This quiz covers the essential specifications for wiring in equipment and relay racks, adhering to IRS guidelines. It includes details on conductor sizes, cable types, and connection methods essential for maintaining neat and accessible wiring. Test your knowledge on these critical aspects of wiring and relay systems.

More Like This

Electrical Wiring and Conductors Quiz
9 questions

Electrical Wiring and Conductors Quiz

HandsomeVariable avatar
HandsomeVariable
NEC Chapter 3: Wiring Methods and Materials
50 questions

NEC Chapter 3: Wiring Methods and Materials

SkilledAzalea avatar
SkilledAzalea
Wiring and Relay Racks Overview
24 questions

Wiring and Relay Racks Overview

SolicitousOklahomaCity avatar
SolicitousOklahomaCity
Electrical Wiring Specifications and Methods
16 questions

Electrical Wiring Specifications and Methods

SlickHeliotrope9498 avatar
SlickHeliotrope9498
Use Quizgecko on...
Browser
Open
Browser
Browser