Electric Point Machine Specifications
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Questions and Answers

What is the primary focus of the document titled 'ELECTRIC POINT MACHINE NON TRAILABLE TYPE'?

  • Safety standards for electrical installations
  • Operational guidelines for different machinery types
  • User manuals for various tools and accessories
  • Specifications and requirements for electric point machines (correct)
  • Which section is likely to contain safety precautions during the operation of the machine?

  • General requirements (correct)
  • Wiring
  • Inspection and Testing
  • Machine case
  • In which section would you expect to find information regarding the manufacturer of the electric point machine?

  • Installation and maintenance manual
  • Packing
  • Manufacturer (correct)
  • Operating Characteristic
  • Which section would provide the dimensions and design features of the motor?

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

    What is the purpose of the 'Inspection and Testing' section?

    <p>To outline the quality assurance procedures (B)</p> Signup and view all the answers

    What materials can be used for the crank handle arrangement in the Electric Point Machine?

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

    Where can one find the warranties associated with the electric point machines?

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

    Which section addresses the assembly of the electric point machine?

    <p>Installation and maintenance manual (B)</p> Signup and view all the answers

    Which of the following statements about sealing materials is true?

    <p>The sealing arrangement must withstand maintenance activities. (C)</p> Signup and view all the answers

    What is likely to be covered under 'Marking & Identifications'?

    <p>Compliance labels and identification codes (A)</p> Signup and view all the answers

    What is the purpose of the cable gland provided at the cable entry holes?

    <p>To protect against dust and water with IP67 Protection. (A)</p> Signup and view all the answers

    What should be done to the sealing material before each monsoon?

    <p>Its condition should be checked and replaced if needed. (B)</p> Signup and view all the answers

    Which of the following is NOT a sealing material mentioned for the Lock Rod arrangement?

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

    For what purpose must the openings in the Electric Point Machine case be designed?

    <p>To provide ample size and convenient access to terminals. (C)</p> Signup and view all the answers

    Which assembly is indicated to contain a rubber gasket?

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    Which aspect is important for the cable entries of the Electric Point Machine?

    <p>They must be weather-proof. (A)</p> Signup and view all the answers

    Which material is used for the point machine cover?

    <p>Silicone (A), EPDM (B)</p> Signup and view all the answers

    Which detail is NOT required to be engraved on the nameplate of the electric point machine?

    <p>Rated power output (C)</p> Signup and view all the answers

    What protective measure is specified for the external portion of the electric point machine?

    <p>Coated with anti-corrosive black paint (A)</p> Signup and view all the answers

    Which test is NOT part of the type tests conducted for the electric point machine?

    <p>Environmental resistance test (A)</p> Signup and view all the answers

    What is the minimum level of environmental protection specified for the electric point machine's cover?

    <p>IP 67 Protection (C)</p> Signup and view all the answers

    Which of the following components requires a suitable protective coating?

    <p>Crank handle contacts (C)</p> Signup and view all the answers

    What is the rated voltage specified for the electric point machine?

    <p>110V, DC (B)</p> Signup and view all the answers

    Which process is part of the inspection and testing to verify compliance with specifications?

    <p>Operating voltage test (D)</p> Signup and view all the answers

    Which type of load is specifically mentioned in the specifications of the electric point machine?

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

    What components are included in the contractor unit assembly identified as S10921-22-23?

    <p>Holding Pin Assembly, Holding Pin, Pin for Nipple (D)</p> Signup and view all the answers

    Which assembly is associated with the component S10957?

    <p>Oil felt arrangement (C)</p> Signup and view all the answers

    What is the function of the components listed under S10933-34-35-36?

    <p>Roller B and Roller A for bracket assembly (D)</p> Signup and view all the answers

    Which of the following is NOT part of the assembly S10949-50-51-52?

    <p>Pin for Nipple (B)</p> Signup and view all the answers

    Which assembly involves a gasket within its components?

    <p>S10924A-24B (A)</p> Signup and view all the answers

    What is the primary role of the components listed under S10961-62-63-64?

    <p>Locking the cover assembly (D)</p> Signup and view all the answers

    The component identified as S10965-66-67-68 contains which of the following?

    <p>Rubber gasket and cover latch pin (A)</p> Signup and view all the answers

    What type of terminals are specified for the machine?

    <p>M6 of nut type (A)</p> Signup and view all the answers

    What type of assembly is S10920 classified as?

    <p>Contractor unit assembly (B)</p> Signup and view all the answers

    What is the minimum spacing required for terminals?

    <p>20 mm (D)</p> Signup and view all the answers

    What is the minimum requirement for the cross-sectional area of conductors used in internal wiring?

    <p>2 sq.mm (D)</p> Signup and view all the answers

    What must be provided at both ends of each conductor for internal wiring?

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

    For maintenance purposes, what arrangement is suggested for the crank handle/key sockets?

    <p>Detachable arrangement (C)</p> Signup and view all the answers

    What type of wiring diagram is required to be attached to the machine cover?

    <p>Engraved metallic diagram (D)</p> Signup and view all the answers

    What ensures that wire connections can be easily tested?

    <p>Common terminal capability (A)</p> Signup and view all the answers

    What type of copper is specified for the conductors in internal wiring?

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

    Which component is specifically identified as a type that deals with high thrust in the electric point machine?

    <p>High Thrust Rotary Locking Type (C)</p> Signup and view all the answers

    What type of assembly is associated with the lock rod in the electric point machine?

    <p>Lock arm assembly (B)</p> Signup and view all the answers

    Which part is used for the electric point machine's crank handle assembly?

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

    Which item among the listed is NOT part of the slide cover section of the electric point machine?

    <p>Lock arm assembly RH (C)</p> Signup and view all the answers

    Identify the component that serves as a mechanism to control the lock slide within the electric point machine.

    <p>Locking Bar assembly (C)</p> Signup and view all the answers

    Which two plates are included in the layout facing point BG of the electric point machine?

    <p>Insulation Plate R.H. and Insulation Plate L.H. (C)</p> Signup and view all the answers

    What is the primary function of the rubber gasket within the electric point machine?

    <p>To provide sealing (A)</p> Signup and view all the answers

    Which component serves as the primary base for the electric point machine assembly?

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

    Flashcards

    Rated Voltage

    The maximum voltage the electric point machine can handle without damage.

    Sequence of Operation

    The sequence of steps the electric point machine follows during operation, including actions of the motor, crank handle, and internal mechanisms.

    Machine Case

    The outer casing of the electric point machine, which protects internal components and provides a safe enclosure.

    Motor

    The electric motor that powers the movement of the crank handle and the switching mechanism.

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    Crank Handle

    A lever that connects to the switching mechanism, allowing manual operation of the point machine in case of power failure.

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    Terminals

    Electrical connections for external circuits, used for power supply and signaling.

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    Wiring

    The wiring system connecting the motor, terminals, and other components, ensuring proper electrical flow.

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    Operating Characteristic

    The characteristics of the electric point machine's operation, including response times, switching speed, and power consumption.

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    Base

    This assembly provides the main structure of the point machine, ensuring stability and attachment of the other components.

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    Drive Rod

    This rod connects to the base and transmits the driving force from the motor to the point machine's movable parts.

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    Bracket RH

    The bracket on the right side of the point machine, providing support and mounting points for other components.

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    Bracket LH

    The bracket on the left side of the point machine, similar in function to the RH bracket but mirrored.

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    Lock Rod RH/LH

    This rod locks the points in their desired position, ensuring safe and reliable track operation.

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    Cover Assembly

    The cover assembly shields the internal mechanisms of the point machine from the elements and debris.

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    Detector Rod LH/RH

    A rod that senses the position of the points, sending signals to the control system for proper operation.

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    Main Gear Rack Pinion

    The rack pinion engages with the main gear rack, converting the motor's rotation into linear motion for point movement.

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    Detachable Crank Handle/Key Socket

    The point machine should have a detachable arrangement for the crank handle or key socket, allowing the same handle or ward to be used in different machines for maintenance purposes.

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    Terminal Type and Specifications

    Terminals should be of M6 nut type or as specified by the purchaser, meeting the specifications of IRS: S 23.

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    Terminal Spacing and Accessibility

    Terminals should be spaced at least 20 mm apart and be easily accessible for connecting wires.

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    Terminal Location and Types

    Terminals for external connections should be located close to the cable entry point, while those for the cable entry should be of a standard type.

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    Terminal Identification

    Terminals should be marked for identification purposes based on the connection diagram.

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    Internal Wiring Standards

    Internal wiring should be organized and meet the requirements of IRS: S 23. Color coding and numbering should follow Figure 1.

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    Internal Wiring Specifications

    Internal wiring conductors must be insulated and made of tinned, stranded copper wire with a cross-sectional area of at least 2 sq.mm and at least 3 strands. Both ends of each conductor should have crimped and soldered eyelets for secure connections.

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    Disconnectable Wire Connections

    Wires connected to a common terminal should be readily disconnected for testing purposes.

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    NBR (Nitrile Butadine Rubber)

    A seal material commonly used in Electric Point Machines to resist moisture and wear. It's known for its flexibility and resistance to oil and grease.

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    Viton/Silicone

    A more robust material used in Electric Point Machines for sealing, especially in demanding conditions like exposure to high temperatures or chemicals.

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    EPDM (Ethylene propylene diene monomer)

    A material used in Electric Point Machines to create a tight seal, it's resistant to extreme temperatures and helps prevent water ingress.

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    Lock Rod arrangement (LH/RH)

    The method of installing the Electric Point Machine's operating rod based on its orientation. LH means left-hand, RH means right-hand.

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    Cable entry point

    Provides a way to connect and protect electrical cables entering the Electric Point Machine housing. It ensures both weather resistance and secure cabling.

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    Crank handle arrangement

    An opening where a crank handle is used to operate the Electric Point Machine, usually protected by a weatherproof cover.

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    IP67 Protection

    A waterproof rating that ensures protection against dust and water ingress. IP 67 means it can withstand submersion in water up to a specific depth.

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    Point Machine cover

    A durable cover that encloses the Electric Point Machine, providing protection from the elements while still allowing access for maintenance.

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    What information must be on the nameplate of an electric point machine?

    The nameplate attached to the electric point machine must contain specific details such as the manufacturer's name, type, serial number, and operating voltage.

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    What parts of an electric point machine require protective coating?

    Detector contacts, crank handle contacts, and the motor of an electric point machine should be protected with a suitable coating.

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    What is the standard finish for an electric point machine?

    The external portion of the electric point machine is normally painted with a black, anti-corrosive paint. The cover with IP 67 protection is galvanized or made of stainless steel. The base is galvanized or painted with water-proof paint.

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    What is the purpose of inspecting an electric point machine?

    Electric point machines are inspected to ensure they meet the specifications outlined in IRS: S 23 and the current document.

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    What is a type test for an electric point machine?

    Type tests for electric point machines are conducted to verify various aspects of the machine's functionality.

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    What are the specific components of a type test for an electric point machine?

    The type tests include a visual check, operating voltage test, high voltage test, insulation resistance test, AC immunity test, obstruction test, performance test, life test, and dimensional check.

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    What does the visual check in a type test entail?

    The visual check ensures the point machine's physical condition is acceptable. This test ensures the machine is physically sound and visually free of defects.

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    What is the purpose of the operating voltage test?

    The operating voltage test verifies that the point machine functions correctly at its designated operating voltage. It checks the electrical conductivity and performance of the machine.

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    Contractor Unit Assembly (S10916-17-18-19)

    This assembly includes various parts like Pin, Square head Bush, Spring, and Threaded Bush.

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    Contractor Unit Assembly - Transparent Cover (S10920)

    A transparent cover that shields the contactor unit.

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    Contactor Unit Assembly - Holding Pin Assembly (S10921-22-23)

    This assembly includes key components like the Holding Pin assembly and the Pin for Nipple.

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    Contact Unit Assembly - Gasket/Stiffner (S10924A-24B)

    This assembly consists of components like Gasket and Stiffner, which contribute to the structural integrity and sealing of the contactor unit.

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    Contactor Unit Assembly - Bracket Assembly (S10925-26)

    This assembly includes a bracket that holds the contactor unit in place.

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    Bracket Assembly LH&RH Contact Assembly A (S10927)

    A bracket specifically designed for the left and right contact assemblies 'A' of the contactor.

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    Bracket Assembly LH&RH Contact Assembly B (S10928)

    A bracket specifically designed for the left and right contact assemblies 'B' of the contactor.

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    Bracket Assembly LH&RH - Roller B/Roller A (S10933-34-35-36)

    This assembly includes components like Roller B and Roller A, essential for movement and function of the contactor.

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    Study Notes

    Document Information

    • Document Number: IRS: S: 24-2025
    • Revision: 3.0
    • Date Effective: 08.01.2025
    • Document Title: ELECTRIC POINT MACHINE NON TRAILABLE TYPE
    • Number of Pages: 26
    • Prepared by: JRE/S&T
    • Issued by: Exe. Director/Signal-II/RDSO
    • Organization: Research Designs & Standards Organization, Lucknow – 226 011

    Specification for Electric Point Machine

    • This document details the specifications for a non-trailable Electric Point Machine.
    • The document covers various aspects, including terminology, operation, components, and testing procedures.
    • It includes specific types of electric point machines, differentiated by throw and protection type (IP67).

    Document Data Sheet

    • IRS: S: 24-2024
    • Title of Document: SPECIFICATION FOR ELECTRIC POINT MACHIN NON TRAILABLE TYPE.
    • Authors: Shri Dipu Shyam, Shri Suresh Kumar
    • Positions: Executive Director/Signal-II/RDSO, Principal Executive Director / Signal & Telecom, RDSO
    • Abstract: Defines the specification for electric point machine non-trailable type.

    Document Control Sheet

    • Organization: RDSO
    • Function(s): Member, Approving Authority
    • Levels: Prepare, Approve

    Amendments

    • The document lists various revisions and amendments for IRS standards related to Electric Point Machines through the years; including first release in 1963.

    Amendment 1 (Details)

    • This section provides details on specific clauses and amendments related to 450/580 kg test loads; modification to table, and inclusion of tools for maintenance in the point equipment specifications.

    Table of Contents

    • This table lists the sections and pages of the document, outlining its organization.
    • Major section topics include scope, terminology, operating characteristics, manufacturing, inspection, and testing procedures.

    Foreword

    • Details required standards and specifications.
    • Identifying Indian Railway Standards (IRS) and Indian Standards (IS) associated with the specifications.

    Scope

    • This document's scope covers the requirements of electric point machines with internal locking systems.
    • Specific types mentioned: Electric Point Machine: 143 mm throw, Electric Point Machine: 220 mm throw, Electric Point Machine with IP 67 Protection: 143 mm throw, Electric Point Machine with IP 67 Protection: 220 mm throw.

    Terminology

    • Defines relevant terms in the context of electric point machines.
    • Examples include "Electric Point Machine," "Electric Point Machine with IP67 protection," "Throw-Bar," "Lock Slide", and "Detector."
    • Clarifies how these terms relate to the equipment's workings.

    Sequence of Operations

    • Outlines the standard operational sequences for the electric point machine.
    • These procedures include opening/closing detection contacts, unlocking/locking points, and moving/positioning of points.

    Rated Voltage

    • The specified voltage for the electric point machine is 110V DC.

    General Requirements

    • The equipment needs robust design, proper protection from interference, and functionality even in submerged conditions.
    • Details on IP 67 protection.

    Operating Characteristics

    • Indicates compliance with appropriate operating data.
    • Operational limits; load specifications (e.g., 450 kg, 9000 kg); and details about the friction clutch.

    Manufacture

    • Details about manufacturer's responsibilities for drawing compliance, fits/tolerance; workmanship.

    Marking & Identification

    • Specifies marking procedures and standards to be followed by manufacturers.

    Finish

    • Details the finish requirements for various components.
    • Types of paint (anti-corrosive) or material (galvanized/stainless steel) for certain components, depending on the application.
    • Includes clauses related to specific point machine parts.

    Inspection & Testing

    • Outlines the inspection and testing procedures.
    • Different tests are described, including Visual check, operating voltage test, Insulation Resistance Test and life test.
    • Procedures for type tests and acceptance tests.

    Packing

    • Describes packing standards to be adhered to during transportation & transit.

    Warranty

    • Specifies warranty details for the point machine and the materials used.

    Installation & Maintenance Manual

    • Details the content of the installation and maintenance manual to accompany the electric point machine in terms of its procedures.

    Tools & Accessories

    • Lists the tools and accessories included with the equipment, describing types, dimensions, and compliance with specified standards.
    • Includes details for tools specific to IP 67 protected designs.

    Drawings / Annexure-1

    • Drawings of individual components.
    • Detailed lists of each part with corresponding drawing number, identifying features, and function.

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    Description

    Explore the detailed specifications of non-trailable Electric Point Machines, including terminology, operation, and testing procedures. This quiz covers the components and types of electric point machines as specified by the Research Designs & Standards Organization.

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