Electronic Interlocking Systems for Big Yards
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Questions and Answers

What is the minimum AC input voltage the EI system must operate with?

  • 150V (correct)
  • 250V
  • 200V
  • 100V

What is the maximum frequency variation permitted for the EI system's power supply?

  • 50Hz to 52Hz
  • 47Hz to 53Hz
  • 48Hz to 52Hz (correct)
  • 45Hz to 55Hz

Which provision is explicitly mentioned to handle multiple power supply sources?

  • Redundant power supply units
  • Automatic voltage regulation
  • Power supply change over panel (correct)
  • Uninterruptible power supply (UPS) system

What type of protection is required for the EI system to prevent damage from short circuits?

<p>Self-restoring type (A)</p> Signup and view all the answers

What type of malfunctioning does the system need protection from, as mentioned in the text?

<p>False or spurious feed (D)</p> Signup and view all the answers

What document is specifically referenced for surge protection and earthing arrangement?

<p>RDSO SPN 197/2008 (C)</p> Signup and view all the answers

What is the purpose of the power supply arrangement requirement mentioned in section 8.12.6?

<p>To ensure uninterrupted operation even if one processor fails (C)</p> Signup and view all the answers

What color sequence does the VDU screen flash to indicate the color monitor is healthy?

<p>Red, Blue, Green (B)</p> Signup and view all the answers

What is the main benefit of the capability mentioned in section 8.12.7?

<p>Improved reliability of the system (A)</p> Signup and view all the answers

Which of the following is NOT a condition for a hot standby VDU switch over?

<p>Failure of the EI system (C)</p> Signup and view all the answers

What type of cable is used to connect the VDU and CIU?

<p>EI.OFC (B)</p> Signup and view all the answers

How is the basic power supply for the VDU provided?

<p>By the user railway (B)</p> Signup and view all the answers

What is the minimum number of colors/symbols used to display the status of field equipment and track circuits on the VDU?

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

In case of an emergency cancellation through the VDU, what must be done immediately?

<p>Reconfirm with the operator (C)</p> Signup and view all the answers

What type of indication panel is provided for big yards, if desired by the user railway?

<p>LCD based (A)</p> Signup and view all the answers

What is the primary purpose of the flashing red, green, and blue dots on the VDU screen?

<p>To ensure the color monitor is functioning correctly and displaying the correct colors (D)</p> Signup and view all the answers

What is the primary subject of the document titled 'Specification for Electronic Interlocking For Big Yards'?

<p>Electronic interlocking systems for big yards (B)</p> Signup and view all the answers

Who is listed as the author of the document?

<p>Alok Katiyar (A)</p> Signup and view all the answers

What does the document number RDSO/SPN/203/2011 signify?

<p>A unique identifier for the document (D)</p> Signup and view all the answers

What is the effective date of the document's version?

<p>13/09/2011 (A)</p> Signup and view all the answers

What designation is associated with the person who checked the document?

<p>DD/Signal-III (D)</p> Signup and view all the answers

How many pages does the document contain?

<p>24 (A)</p> Signup and view all the answers

Which organization issued the document?

<p>Research Designs &amp; Standards Organization (B)</p> Signup and view all the answers

What is the version number of this document?

<p>1.0 (B)</p> Signup and view all the answers

Which standard must the Ethernet switch/modem comply with for communication between electronic interlockings?

<p>EN 50159-1 &amp; 2 (D)</p> Signup and view all the answers

What type of cable is required for interconnecting EIs installed in different rooms or locations?

<p>RDSO approved OFC cable (D)</p> Signup and view all the answers

What feature allows the Railway to carry out minor yard modifications independently?

<p>User-friendly graphic based design tool (C)</p> Signup and view all the answers

In the case of connecting peripheral devices to the EI, what is required if isolation from the peripheral system is necessary?

<p>Suitable isolators (D)</p> Signup and view all the answers

What type of display is mandatory on all modules of the electronic interlocking systems?

<p>LED/LCD display (B)</p> Signup and view all the answers

What must the communication provided between various EIs comply with?

<p>Requirements for transmission of vital safety information (A)</p> Signup and view all the answers

What is the relationship between optical fiber communication (OFC) and vital serial connections?

<p>All vital serial connections must utilize OFC for communication. (C)</p> Signup and view all the answers

What must be included in the interlocking plan according to the document?

<p>Approved selection/control table (C)</p> Signup and view all the answers

What is the primary purpose of the Electronic Interlocking system specified in the document?

<p>To manage points, signals, and other controls safely (B)</p> Signup and view all the answers

What is a key feature of the connectivity between the central interlocking unit and the object controller?

<p>It uses optical fibre cable to prevent failure. (D)</p> Signup and view all the answers

In which scenario is it permissible to provide Electronic Interlocking at stations with fewer than 200 routes?

<p>If there are numerous signaling input/output functions (B)</p> Signup and view all the answers

What equipment is NOT part of the Electronic Interlocking system?

<p>Train Dispatch Unit (B)</p> Signup and view all the answers

Which function does the Central Interlocking Unit serve in the Electronic Interlocking system?

<p>Performing interlocking and fail safety functions (D)</p> Signup and view all the answers

What would be the role of the Object Controller within the Electronic Interlocking system?

<p>To directly command signaling gears and relay connections (B)</p> Signup and view all the answers

What is the function of the VDU/Operator PC in the Electronic Interlocking system?

<p>To display yard status and generate commands for interlocking (A)</p> Signup and view all the answers

Where can an additional VDU/Screen be placed in the Electronic Interlocking system?

<p>At end cabins for monitoring yard status (C)</p> Signup and view all the answers

What information must be submitted to RDSO regarding the Quality Assurance Program?

<p>A comprehensive report detailing the Verification and Validation (V&amp;V) procedures used, with specific focus on their conformity to specified standards. (C)</p> Signup and view all the answers

In what situation can RDSO have an independent agency verify and validate the software and hardware?

<p>If the supplier's documentation for the V&amp;V process is considered insufficient by RDSO. (A)</p> Signup and view all the answers

What is the primary function of the Maintenance Terminal (MT) described in the text?

<p>To provide a platform for monitoring and diagnosing potential issues with the software and hardware systems. (C)</p> Signup and view all the answers

What specific functionality of the Maintenance Terminal is essential for analyzing past events and simulating yard layout?

<p>The capacity to generate exception reports for the purpose of detailed analysis. (A)</p> Signup and view all the answers

What type of data storage is required to be incorporated into the Maintenance Terminal?

<p>Storage capacity of at least 320 GB for recording and storing various data. (B)</p> Signup and view all the answers

What action is required to be implemented when a module or card becomes faulty within the system?

<p>The supplier must provide a diagnostic facility to identify the faulty module or card and detail the necessary corrective action. (C)</p> Signup and view all the answers

What is the preferred method of connecting the Maintenance Terminal (MT) to the Electronic Interlocking (EI)?

<p>A fiber optic cable (OFC) connection for reliable and efficient communication. (C)</p> Signup and view all the answers

What specific language is used to present the Signaling circuit/manuals on the Maintenance Terminal (MT)?

<p>A simplified and localized language, accessible to engineers who may not be familiar with technical jargon. (A)</p> Signup and view all the answers

Flashcards

RDSO/SPN/203/2011

A document defining the technical specifications for Electronic Interlocking systems designed for large railway yards.

Electronic Interlocking

A system that uses electronic logic to control and interlock railway signals, points, and routes, ensuring safe and efficient train movements.

Big Yards

Large railway yards with extensive track layouts often used for sorting and marshalling trains.

Purpose of this document

The document's purpose is to establish the technical criteria and requirements for Electronic Interlocking systems in large railway yards.

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Specification

Defines the specific functionalities, performance parameters, and design considerations for Electronic Interlocking systems in large yards.

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Scope of application

The document is applicable to the design, installation, and operation of Electronic Interlocking systems within big yards.

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Document Author

Alok Katiyar, Director/ Signal/RDSO, is responsible for the document's creation and issuance.

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Document Approver

Shri Mahesh Mangal, Sr.Executive Director/Signal, RDSO, has approved the document for use.

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What is Electronic Interlocking (EI)?

Electronic Interlocking (EI) is a system that controls the operation of signals, points, and other railway elements using computers and electronic devices.

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Where is EI commonly used?

EI is typically used at large stations with more than 200 routes, where high reliability is crucial.

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What are the core components of EI?

EI systems are built with microprocessors and microcontrollers to manage and control the various railway components.

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What do EI systems control?

EI systems are used to control signals, points, track circuits, level crossings, and other equipment.

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What is the Central Interlocking Unit (CIU)?

The central interlocking unit (CIU) is the main brain of the EI system, responsible for processing commands and ensuring safety.

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What are Object Controllers?

Object controllers are strategically located in the yard to control signals and points directly or through relays.

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What type of connection is used between CIU and object controllers?

Optical fiber cables are used to connect the CIU to the object controllers, providing a reliable and high-speed connection.

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How is EI used for yard control?

EI allows for central control of the entire yard, but screen displays can be placed at end cabins for monitoring purposes.

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EI Interconnection within the Same Room

In large stations, Electronic Interlockings (EIs) may be interconnected using serial/Ethernet connections within the same room. This ensures they communicate effectively with each other.

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EI Interconnection Between Different Rooms

For EIs located in different rooms or buildings, connection is done through Optical Fiber Cables (OFCs) for redundancy and reliability. This ensures data transmission between EIs, even if one connection fails.

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Communication Safety Standards

EI communication must follow safety standards, ensuring reliable transmission of vital information. These standards, like RDSO/SPN/144 and EN50159, make sure the system operates correctly and safely.

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Peripheral Equipment Isolation

If peripherals like displays, data loggers, or other devices need to connect to the EI, isolators should be used to protect the EI from any potential interference or fluctuations from the peripherals.

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Status/Error Indication on EI Modules

Each EI module has LED or LCD displays to show operational status or errors. These displays provide a visual check for any problems or unusual behavior within the system.

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User-Friendly Design Tool for EIs

EIs should have a user-friendly tool that allows railway personnel to create custom software, ensuring the system can be easily adapted to specific station needs and future modifications.

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Railway Staff Modification Capability

Minor changes to the yard layout should be possible without outside help, allowing railway staff to update the system. Proper training should be provided to facilitate this.

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Vital Serial Connections using OFCs

Optical Fiber Cables (OFCs) should be the preferred method of connection for essential serial data transfer between different buildings or rooms. It ensures reliable and high-speed communication between EI units.

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RGB Indication

A visual indicator on the VDU screen, flashing in red, blue, and green, to confirm the monitor's health and proper color display.

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Enlarged Mode

A feature that allows operators to view a larger, zoomed-in version of a specific area within the yard layout on the VDU screen.

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VDU & EI Communication Status

The communication status between the VDU and Electronic Interlocking (EI) is indicated through a flashing signal on the VDU screen.

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Hot Standby VDU Switch Over

When the main VDU fails, a backup VDU automatically takes over to maintain continuous operation, preventing disruptions to the system.

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EI.OFC Cable Connection

The EI.OFC cable acts as the physical connection between the VDU and the Central Interlocking Unit (CIU) to transmit signals and data.

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VDU Display of Yard Status

The VDU display shows field equipment and track circuit statuses using different colors and symbols, providing a live visual representation of the yard's operational state.

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Complete Yard Layout Display

The VDU screen should display the complete yard layout, encompassing all sections and track arrangements.

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Reconsideration of VDU Cancellation

In emergency situations, operators must reconfirm cancellation requests made through the VDU for increased safety and accountability.

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Voltage and Frequency Tolerance

The electronic interlocking system should be able to function correctly even if the input voltage changes between 150V and 275V AC, and the frequency varies between 48Hz and 52Hz.

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Power Supply Changeover Panel

The system should include a feature that allows users to switch between multiple power sources.

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Short Circuit and Overvoltage Protection

The system should include self-restoring protection against short circuits and overvoltages.

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Protection from Malfunctioning

The system should have measures in place to prevent malfunctions caused by false or spurious signals.

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Surge Protection and Earthing

The power supply system should be equipped with surge protection and proper earthing to safeguard against transient voltages, lightning strikes, and electrical spikes.

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Power Supply Arrangement Diagram

A detailed diagram showing the power supply arrangement should be provided to the purchaser.

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Redundant Power Supply

The power supply design should ensure that if one processor's power supply fails, all processors don't stop working simultaneously.

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Processor Replacement Without Affecting the System

The system should allow users to remove and repair or replace a faulty processor without affecting the functioning of the rest of the system.

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RDSO Role in Standards

RDSO (Research Designs & Standards Organisation) has the authority to review and approve software engineering standards used in Electronic Interlocking systems.

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Software Engineering Standards Documentation

Software engineering standards must be fully documented and made available to RDSO for review and approval.

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Quality Assurance Documentation

The Quality Assurance Program, particularly the Verification and Validation (V&V) procedures, must be documented and submitted to RDSO for conformity checks.

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RDSO's Right to Independent Verification

If RDSO deems the V&V procedures inadequate, they have the right to engage an independent agency to verify and validate the software and hardware, at the supplier's expense.

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Maintenance Terminal (MT)

A Maintenance Terminal (MT) is crucial for operating and maintaining an Electronic Interlocking system, providing various functionalities to ensure smooth operations.

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MT Storage Capacity

The MT must have a minimum storage capacity of 320 GB to store recorded events and data related to the yard's operations.

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MT Connectivity to EI

The MT should be connected to the Electronic Interlocking system (EI) ideally using an optical fiber cable for reliable data transmission.

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MT Diagnostic Functionality

The Maintenance Terminal should display diagnostic information when a module or card malfunctions, aiding in identifying and resolving the issue.

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Study Notes

Document Details

  • Document No: RDSO/SPN/203/2011
  • Document Title: SPECIFICATION FOR ELECTRONIC INTERLOCKING FOR BIG YARDS
  • Version No: 1
  • Date Effective: 13/09/2011
  • Reference: 16.09
  • Number of Pages: 24
  • Organization: RESEARCH DESIGNS & STANDARDS ORGANIZATION
  • Location: MANAK NAGAR, LUCKNOW – 226011

Electronic Interlocking for Big Yards

  • Specification details for electronic interlocking systems for large railway yards
  • Covers systems with over 200 routes, high reliability requirements
  • Includes microprocessor based equipment for points, signals, track circuits, etc.
  • System capable of interfacing with advanced systems using serial/Ethernet ports
  • Includes VDU/Operator PC, Central Interlocking Unit, Object Controller, Maintenance Terminal

Document Data Sheet

  • Designation: RDSO/SPN/203/2011
  • Version: 1.0
  • Title of Document: Specification for Electronic Interlocking for Big Yards
  • Authors: See Document Control Sheet
  • Signed by: Alok Katiyar, Shri Mahesh Mangal
  • Designation of Signatories: Director/Signal/RDSO, Sr. Executive Director/Signal, RDSO
  • Abstract: This document defines Electronic Interlocking for big yards.

Document Control Sheet

  • List of individuals involved in document preparation and approval
  • Names of those involved: Jitendra Kumar, S. N. Ram, Alok Katiyar, Mahesh Mangal
  • Designations: Member/RDSO, RDSO Member/Prepare, Signing Authority/RDSO, Approving Authority/RDSO
  • Functions assigned: Prepare, Prepare, Signed by, Approve

Amendments

  • Information regarding amendment history to the document
  • Version: RDSO/SPN/203/2011
  • Chapter/Annexure: FIRST ISSUE
  • Effective Date:

Table of Contents

  • Comprehensive list of sections in the document along with page numbers.
  • Contains sections such as Foreword, Scope, Applicable Documents, Terminology, General Requirements, etc.
  • Key topics include Functional Requirements, Technical Requirements, System/Hardware information, and testing procedures.

Foreword

  • Serial No.: RDSO/SPN/203/2011
  • This specification is a standard document for Electronic interlocking for big yards (likely revised or updated).

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Big Yard EI Availability Specification (RDSO/SPN/203/2011 PDF)

Description

This quiz explores the specifications for electronic interlocking systems designed for large railway yards. It covers key components such as microprocessors, operator PCs, and interfaces for advanced systems, ensuring high reliability for managing over 200 routes. Test your knowledge on the details outlined in the specification document!

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