LED Signal Lamp Testing Standards

<p>They cause no unsafe situations (A)</p> Signup and view all the answers

<p>Both RDSO/SPN/144/2006 and fail safety validation standards (D)</p> Signup and view all the answers

<p>168 hours (D)</p> Signup and view all the answers

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

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

<p>Through reliable designed means (B)</p> Signup and view all the answers

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

<p>100 degrees (C)</p> Signup and view all the answers

<p>Phosphorous bronze terminals (A)</p> Signup and view all the answers

<p>IP-65 (C)</p> Signup and view all the answers

<p>8000 hours (A)</p> Signup and view all the answers

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

<p>Accounts of LEDs and critical components (A)</p> Signup and view all the answers

<p>90 LEDs (B)</p> Signup and view all the answers

<p>1000 m (B)</p> Signup and view all the answers

<p>Current at rated voltage per unit should be between 70 to 90 mA (rms) (D)</p> Signup and view all the answers

<p>+25 % (D)</p> Signup and view all the answers

<p>45 LEDs (B)</p> Signup and view all the answers

<p>400 mA (C)</p> Signup and view all the answers

<p>200 mm ± 10 mm (C)</p> Signup and view all the answers

<p>Must get prior approval from RDSO (A)</p> Signup and view all the answers

<p>Schematic block diagrams (C)</p> Signup and view all the answers

<p>Pre-Commissioning checklist (D)</p> Signup and view all the answers

<p>Bubble sheet and cardboard boxes (A)</p> Signup and view all the answers

<p>It is not responsible for infringement of patent rights. (B)</p> Signup and view all the answers

<p>Code numbers and contents (A)</p> Signup and view all the answers

<p>Correct position and handling instructions (A)</p> Signup and view all the answers

<p>Colored diagrams of LED setups (B)</p> Signup and view all the answers

<p>Suitable filling material (B)</p> Signup and view all the answers

<p>20% (A)</p> Signup and view all the answers

<p>Operating parameters test (C)</p> Signup and view all the answers

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

<p>Failure is not acceptable (C)</p> Signup and view all the answers

<p>Compatibility with ECR (B)</p> Signup and view all the answers

<p>Insulation resistance test (D)</p> Signup and view all the answers

<p>To ensure quality, reliability, and compliance (A)</p> Signup and view all the answers

<p>Colour co-ordinates test (A)</p> Signup and view all the answers

<p>60 months (D)</p> Signup and view all the answers

<p>Inform the vendor within 60 days (A)</p> Signup and view all the answers

<p>45 days (D)</p> Signup and view all the answers

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

<p>The vendor's liability is limited to rectification of the defective lamps. (D)</p> Signup and view all the answers

<p>Rectification/replacement record and failure analysis (D)</p> Signup and view all the answers

<p>5mm minimum (C)</p> Signup and view all the answers

<p>New version number is assigned (C)</p> Signup and view all the answers

The transparent cover of the LED signal lamp should be made of a UV stabilised polycarbonate material with a thickness of 2.5 mm plus or minus .5 mm.

The body of the LED signal lamp should be made of ABS or fibre glass industrial grade plastic. Metallic body parts can be used if they help dissipate heat.

The LED signal lamp should be designed to fit securely onto existing signal housings without any modifications needed.

The visible parts of the LED signal lamp body, once fitted in the unit, should be black in color.

The LED signal lamp body should meet the IP-65 international standard for protection against dust and water.

Four phosphorous bronze terminals should be provided on the back of the lamp. Two of the terminals should have a 175V MOV (Metal Oxide Varistor) for protection. The outer terminals should be marked as "input" and used for input termination.

All LED signal lamps should meet the requirements specified in clauses 2.3, 2.5, 5.2, and 6 of RDSO /SPN/144/2006

The LEDs used in the LED signal lamp should be high-quality and from reputable manufacturers, as stipulated by RDSO. The maximum junction temperature should not be less than 100 degrees Celsius. The epoxy used in the LEDs should contain UV inhibitors.

A minimum of 10% of LEDs and key components from each purchased batch should be tested before use. This testing verifies electrical and optical characteristics based on the LED manufacturer's data sheet. A record of the testing should be kept and available for verification by inspectors.

Any changes to the number or type of LEDs used in a signal lamp require prior approval from the RDSO (Research Designs and Standards Organisation).

A rail mountable fuse terminal block with a 400 mA fuse link is required for LED signal lamps. It should be accompanied by a disconnect type terminal block (RDSO spec No.RDSO/SPN/ 189/2004) and a 175 V MOV (Metal Oxide Varistor). The signal lamp should also integrate a LED signal lamp. The terminal blocks are designed to support 3/4 conductors (1/2 input and 2 output terminals), and a mounting rail of 12 inches is required for every 20 signal lamps.

High-speed lines, specifically those operating at 165 kmph, require LED signal lamps with a display area of 200 mm + 10 mm diameter.

For high-speed lines, the minimum number of LEDs required in a signal lamp is 90 for red and yellow lights, and 45 for green lights. However, variations may be considered based on the design's specific merits.

LED signal lamps for main color light signals must have a minimum visibility distance of 1000m in clear daylight, even with direct sunlight, at the lamp's rated voltage.

For LED signal lamps used with AC LED ECRs (Electronic Control Relays), specific operating parameters apply. These parameters include rated voltage, current, and illumination (measured at 1.5 meters from the signal lamp).

Most design criteria and testing requirements for high-speed LED signal lamps remain the same as for normal LED signal lamps. The specific differences are related to the display area, LED count, and visibility requirements.

A sparking LED signal lamp is considered a failure and needs to be addressed. It should not be assumed to be functional.

The insulation resistance between the body and electrical terminals of the LED signal lamp must be tested before and after the high voltage test, as well as after the climatic test.

The LED signal lamp should be designed to prevent any single component failure from causing an unsafe or undesirable situation.

Spike protection measures are essential to prevent damage to the LED signal lamp from voltage surges.

The color of the signal light emitted by the LED lamp should not change under various conditions, including temperature changes, voltage fluctuations, and aging.

The design of the LED signal lamp should comply with the requirements outlined in the RDSO / SPN / 144 / 2006 specification for signal lamps.

An independent agency should validate the fail-safe capabilities of the LED signal lamp, ensuring it meets specific safety standards.

The LED signal lamp must undergo a continuous burning test for at least 168 hours at 60°C and rated voltage. Its operating parameters must not change before and after this test.

A testing process conducted on a sample of manufactured LED signal lamps to ensure they meet required quality standards.

A group of tests performed on 20% of manufactured LED signal lamps before they are considered acceptable.

Test of basic visual characteristics and dimensions of the LED signal lamp.

Testing the LED signal lamp's performance against defined specifications, including minimum lighting voltage, compatibility with existing equipment (ECR), and operating parameters.

Tests applied to a smaller sample of lamps that have already passed the initial acceptance tests. These tests aim to ensure the lamps' durability and functional integrity.

Evaluation of the lamp's ability to withstand temperature fluctuations, a vital test for ensuring the lamp's reliability under various environmental conditions.

Measurement of the color characteristics of the LED light emitted by the signal lamp.

Tests conducted after the temperature severity tests, focusing on aspects like color co-ordinates, insulation resistance, dispersion angle, and fluctuation in input voltage.

The vendor will provide a 60-month warranty for the LED signal lamps. In case of lamp failure within 24 months, the vendor will replace the lamp for free within 45 days. After 24 months, the railway must send the defective lamps to the vendor for repair and return.

The railway must inform the vendor about defective lamps within 60 days after the 24-month warranty period expires. If the railway fails to inform the vendor within this timeframe, the vendor's liability for repairs will be limited.

The vendor is responsible for repairing and testing defective lamps received after the initial 24-month warranty period. They must return the repaired lamps within 45 days along with test reports. The vendor must maintain records and submit them to RDSO quarterly.

The words 'Indian Railway Property' should be engraved or embossed on every lamp unit, clearly visible, with letters at least 5mm in size.

The nameplate should be firmly attached to each lamp unit and must include the manufacturer's name/trademark, unit serial number, version number, RDSO specification number, signal name and aspect, operating voltage, and the month and year of manufacture.

A new version number must be assigned if there are changes to the design of the lamp unit. This allows for tracking and identification of different versions.

The LED signal lamp should be designed to fit seamlessly onto existing signal housings without requiring any modifications.

These include guaranteed performance data, technical specifics, mounting arrangement details, schematic diagrams, mechanical drawings, and part details.

The manual should include troubleshooting procedures, test voltages, waveforms at different points, and details on troubleshooting through HMU.

Each LED signal lamp is individually wrapped in bubble sheet and packed in a box. The empty spaces are filled with packing material. The units are then put in a wooden case or card box for protection during transport.

Every box should be marked with code numbers, contents, the manufacturer's name, an arrow indicating the top, and signs like 'Handle with Care'.

Indian Railways is not responsible for any patent infringement due to similarities in design, manufacturing process, or components used.

The visible parts of the LED signal lamp body should be black.