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Questions and Answers
What is the nominal voltage at which the aspect should be lit for testing according to the measurement procedure?
What is the nominal voltage at which the aspect should be lit for testing according to the measurement procedure?
- 220 V
- 110 V (correct)
- 120 V
- 240 V
How is the dispersion angle calculated according to the provided measurement procedure?
How is the dispersion angle calculated according to the provided measurement procedure?
- By averaging the distances of the intensity points at 1.5 m
- By measuring the distance from the center to the nearest LED
- By calculating the difference between d1 and d2
- Using the formula $tan^{-1}(d - r) = Ø / 2$ (correct)
What does 'r' represent in the dispersion angle calculation?
What does 'r' represent in the dispersion angle calculation?
- The distance from the center of the unit to the outermost LED (correct)
- The distance from the LED signal lighting unit to the test bench
- The radius of the lighting unit's illumination area
- The average distance between the half intensity points
Where should the measurement for dispersion angle be taken?
Where should the measurement for dispersion angle be taken?
What is a half intensity point in the context of the dispersion angle measurement?
What is a half intensity point in the context of the dispersion angle measurement?
Who is the author of the document RDSO/SPN/153/2023 Revision 5.0?
Who is the author of the document RDSO/SPN/153/2023 Revision 5.0?
What is the primary focus of the document RDSO/SPN/153/2023 Revision 5.0?
What is the primary focus of the document RDSO/SPN/153/2023 Revision 5.0?
Which type of signals are included in the technical specifications outlined in the document?
Which type of signals are included in the technical specifications outlined in the document?
What is the effective date of the specification RDSO/SPN/153/2023 Revision 5.0?
What is the effective date of the specification RDSO/SPN/153/2023 Revision 5.0?
Who approved the document RDSO/SPN/153/2023 Revision 5.0?
Who approved the document RDSO/SPN/153/2023 Revision 5.0?
What is the maximum current drawn by an LED Signal Lighting Unit when it fails to meet the illumination criteria?
What is the maximum current drawn by an LED Signal Lighting Unit when it fails to meet the illumination criteria?
How many route signal lighting units should be wired in parallel for Direction type Route Indicator?
How many route signal lighting units should be wired in parallel for Direction type Route Indicator?
What is the acceptable range for total input current drawn after wiring the signal lighting units?
What is the acceptable range for total input current drawn after wiring the signal lighting units?
What should the illumination fall below for the Calling ON signal lighting unit to extinguish?
What should the illumination fall below for the Calling ON signal lighting unit to extinguish?
What is the maximum acceptable voltage for signal lighting units to operate?
What is the maximum acceptable voltage for signal lighting units to operate?
What is the dispersion angle for Route signal lighting units measured at 50% power points?
What is the dispersion angle for Route signal lighting units measured at 50% power points?
What is the condition under which fluctuations in input voltage should not result in a failure mode?
What is the condition under which fluctuations in input voltage should not result in a failure mode?
What illumination angle is specified for shunt signal lighting units?
What illumination angle is specified for shunt signal lighting units?
What is the required rated voltage at input for all types of LED signal lighting units?
What is the required rated voltage at input for all types of LED signal lighting units?
Which aspect has its colour coordinates defined as Class 'C' of BS: 1376?
Which aspect has its colour coordinates defined as Class 'C' of BS: 1376?
What is the current at rated voltage for a Shunt Lighting Unit?
What is the current at rated voltage for a Shunt Lighting Unit?
What is the illumination level measured at 1.5 m from an LED Signal Lighting Unit for a Route Lighting Unit?
What is the illumination level measured at 1.5 m from an LED Signal Lighting Unit for a Route Lighting Unit?
Which LED signal lighting unit has a specified yellow colour?
Which LED signal lighting unit has a specified yellow colour?
What tolerance is given for the illumination measurement at rated voltage for a Shunt Lighting Unit?
What tolerance is given for the illumination measurement at rated voltage for a Shunt Lighting Unit?
What are the operating parameters of LED signal lighting units dependent on?
What are the operating parameters of LED signal lighting units dependent on?
Which of the following aspects has specified illumination of 30 LUX?
Which of the following aspects has specified illumination of 30 LUX?
What percentage of samples from a lot are subjected to tests during the acceptance test phase?
What percentage of samples from a lot are subjected to tests during the acceptance test phase?
Which test is NOT mentioned as part of the minimum requirements for the acceptance tests?
Which test is NOT mentioned as part of the minimum requirements for the acceptance tests?
What is the requirement for fail safety for subsequent maintenance approvals?
What is the requirement for fail safety for subsequent maintenance approvals?
What is the first test to be conducted after ambient temperature testing?
What is the first test to be conducted after ambient temperature testing?
Which clause defines the requirement for the dispersion angle test?
Which clause defines the requirement for the dispersion angle test?
What is the rated voltage at input terminals for the LED lighting units used in tunnels?
What is the rated voltage at input terminals for the LED lighting units used in tunnels?
What is the purpose of conducting a visual inspection and dimensional check during the acceptance test?
What is the purpose of conducting a visual inspection and dimensional check during the acceptance test?
Which of the following tests is conducted to verify the performance of current regulation in the circuit?
Which of the following tests is conducted to verify the performance of current regulation in the circuit?
Which aspect is designed to extinguish in case of failure to avoid a double aspect condition?
Which aspect is designed to extinguish in case of failure to avoid a double aspect condition?
If a sample fails any of the tests during acceptance testing, what is the outcome?
If a sample fails any of the tests during acceptance testing, what is the outcome?
What is the limitation on input current for the LED signal lamp during failure?
What is the limitation on input current for the LED signal lamp during failure?
What is the current at rated voltage per unit at input terminals?
What is the current at rated voltage per unit at input terminals?
At what distance is illumination measured for the LED signal lighting unit?
At what distance is illumination measured for the LED signal lighting unit?
What is the expected illumination level from the LED signal lighting unit in axial direction?
What is the expected illumination level from the LED signal lighting unit in axial direction?
What characteristic must the LED signal lamp ensure regarding ECR pick up current?
What characteristic must the LED signal lamp ensure regarding ECR pick up current?
What should happen in the case of an intermittent failure of the lamp?
What should happen in the case of an intermittent failure of the lamp?
Flashcards
What is the purpose of RDSO/SPN/153/2023 Revision 5.0?
What is the purpose of RDSO/SPN/153/2023 Revision 5.0?
This document specifies technical requirements and inspection criteria for LED Signal Lighting Units designed for use in subsidiary color light signals, including route, shunt, calling-on, and tunnel signals.
What types of signals utilize LED Signal Lighting Units?
What types of signals utilize LED Signal Lighting Units?
LED Signal Lighting Units are used in various types of signals like route, shunt, calling-on, and tunnel signals for railway signaling.
What is the importance of inspecting LED Signal Lighting Units?
What is the importance of inspecting LED Signal Lighting Units?
These units are designed and inspected to ensure compliance with required technical standards for railway signaling.
What does RDSO/SPN/153/2023 Revision 5.0 cover?
What does RDSO/SPN/153/2023 Revision 5.0 cover?
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When did RDSO/SPN/153/2023 Revision 5.0 become effective?
When did RDSO/SPN/153/2023 Revision 5.0 become effective?
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Dispersion Angle
Dispersion Angle
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Chromaticity Limits
Chromaticity Limits
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Half Intensity Point
Half Intensity Point
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Distance, 'r'
Distance, 'r'
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Nominal Voltage
Nominal Voltage
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Fail Safety
Fail Safety
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Fluctuation in Input Voltage Test
Fluctuation in Input Voltage Test
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Output Current Regulation Test
Output Current Regulation Test
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Ambient Temperature Test
Ambient Temperature Test
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Color co-ordinates
Color co-ordinates
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Minimum Lighting Voltage Test
Minimum Lighting Voltage Test
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Dispersion Angle Test
Dispersion Angle Test
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Visual Inspection and Dimensional Check
Visual Inspection and Dimensional Check
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BS 1376
BS 1376
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Route Lighting Unit
Route Lighting Unit
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Shunt Lighting Unit
Shunt Lighting Unit
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LED Signal Lighting Unit
LED Signal Lighting Unit
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Illumination
Illumination
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Calling-on Signal
Calling-on Signal
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Compatibility with ECRs
Compatibility with ECRs
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RDSO Specification STS/E/Relays/AC Lit LED Signal/09-2002
RDSO Specification STS/E/Relays/AC Lit LED Signal/09-2002
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LED Signal Lighting Unit Shutdown
LED Signal Lighting Unit Shutdown
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Parallel Wiring of Signal Lights
Parallel Wiring of Signal Lights
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Total Input Current for Signal Lights
Total Input Current for Signal Lights
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Calling ON Signal Failure Behavior
Calling ON Signal Failure Behavior
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Dispersion Angle of Signal Lights
Dispersion Angle of Signal Lights
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Signal Lighting Unit Activation Voltage
Signal Lighting Unit Activation Voltage
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Voltage Fluctuation and Signal Failure Mode
Voltage Fluctuation and Signal Failure Mode
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Dispersion Angle Variation
Dispersion Angle Variation
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LED Signal Unit Fit Requirements
LED Signal Unit Fit Requirements
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General Signal Unit Requirements
General Signal Unit Requirements
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LED Signal Unit Operating Voltage
LED Signal Unit Operating Voltage
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LED Signal Unit Current Draw
LED Signal Unit Current Draw
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LED Signal Unit Illumination
LED Signal Unit Illumination
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LED Signal Design for ECR Pick-up
LED Signal Design for ECR Pick-up
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Signal Failure Design for Green and Yellow
Signal Failure Design for Green and Yellow
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Signal Design for Red Aspect Failure
Signal Design for Red Aspect Failure
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Study Notes
Specification Details
- Document Title: Technical Specifications for LED Signal Lighting Units for Subsidiary Colour Light Signals (Route, Shunt, Calling-on and Tunnel Signals) for Railway Signalling
- Revision: 5.0
- Specification No.: RDSO/SPN/153/2023
- Author: Ajay Verma, Executive Director/Signal-II
- Approved by: Rajendra Dhambel, Principal Executive Director/S&T
- Purpose: Defines technical specifications and inspection criteria for LED signal lighting units for subsidiary colour light signals (route, shunt, calling-on, and tunnel signals) for railway signalling.
- Document Data Sheet: Provides details of the document's designation, title, author, and approver.
Technical Specifications
- LED Signal Lighting Units: Designed for use in railway signalling applications, specifically for subsidiary colour light signals (route, shunt, calling-on, and tunnel).
- Standards Compliance: Incorporates relevant Indian Railway Standards (RDSO), British Standards, and International Standards.
- Color Coordinates: Specifications for color coordinates of LED signals are outlined, referencing British Standards (BS: 1376).
- Operating Parameters: Provides detailed operating parameters, including rated voltage, current, illumination, and colour tolerances, for different signal types (C-ON, Route Lighting, Shunt).
- Tunnel Signals (Metro Railway, Kolkata): Specific requirements for LED signals used in tunnels of the Kolkata Metro Railway are detailed, addressing aspect variations, visibility distances, and fixture integration.
- Dimensions: Specifies display area dimensions for calling-on, route, and shunt types of signals.
- Materials: Details required material and components (e.g., polycarbonate cover, industrial grade plastic, etc.), ensuring components meet relevant standards.
General Requirements & Testing
- Visibility Distance: Minimum visibility distances (400m or 200m) for different signal types are detailed, considering factors like peak daylight and signal placement.
- Signal Housing Compatibility: LED signal units must be compatible with existing signal housings, adhering to specified dimensions.
- Testing and Performance Criteria: Procedures outlined for type tests and acceptance tests, including visual inspections, dimensional checks, operating parameters, compatibility with existing equipment, and environmental testing (vibration, thermal cycling).
Additional Information
- Documentation: Requirements for provided documentation alongside the supplied units are included, ranging from installation manuals to test data.
- Packing and Handling: Packaging particulars and safety instructions for handling the units during transit are detailed.
- Warranty: The specified warranty period for LED signal lighting units is 60 months. Defective lamps replaced within 45 days of reported failure by the railway.
- Table Of Contents: Includes a sequential listing of various clauses, with a corresponding page number for easy navigability within the document.
- Annexures: Annexures contain supporting data or diagrams, such as chromaticity limits for signal colors, measuring procedures for dispersion angles.
- Dispersion Angle: Measurement procedure, detailing the method for obtaining the dispersion angle.
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Description
This quiz covers the technical specifications for LED signal lighting units used in subsidiary colour light signals within railway signalling systems. It includes details regarding standards compliance and inspection criteria, focusing on various signal types such as route and shunt signals.
