LED Signal Unit for Subsidiary Aspect Shunt Signal with Built in Current Regulator
RDSO / Spec No.
RDSO/SPN/153/2011
Application
Indian Railways (S&T Sector) - Subsidiary Aspect Shunt Signalling
Product Specifications & Details
The LED Signal Unit for Subsidiary Aspect Shunt Signal manufactured by General Auto Electric Corporation (GAEC) delivers reliable low-level signaling for train movement and shunting operations across railway yards. Built in compliance with RDSO Specification No. RDSO/SPN/153/2011, this 110V AC-fed LED unit features an integrated current regulator, phantom-free multi-array design, and UV-stabilized lenses for harsh outdoor environments. It seamlessly integrates with Solid State Interlocking (SSI), Relay Interlocking, and Electronic Interlocking (EI) systems across both RE and Non-RE areas.
Key System Features
- Built-In Regulation: Integrated current regulator ensures stable current draw and light output across voltage fluctuations.
- Daylight Visibility: Minimum 200-meter visibility in clear daylight with peak sunrays at rated voltage.
- Fail-Safe Architecture: Multi-array layout with phantom-free design ensures complete operational safety.
- Lamp Proving Support: Compatible with Signal Exchange Relays (ECR) and Electronic Interlocking (EI).
- Guaranteed Blanking: Unit remains completely BLANK below 70V AC to eliminate false aspect signals.
- RDSO Approved: Certified by RDSO Lucknow for both Railway Electrified (RE) and Non-RE traction zones.
Technical Specifications Table
| Parameter | Specification Standard |
|---|---|
| Color of the Unit | WHITE |
| Power Supply & Variation | 110 V AC, Single Phase, 50 Hz | Input Variation: 88V to 132V |
| Input Current & Load Regulation | 23.75 mA to 26.25 mA | Load Regulation: ± 2% (From 88V to 132V) |
| Display Area & LED Count | 85 mm dia ± 1 mm | Min. 13 LEDs |
| Illumination & Dispersion Angle | 45 to 70 Lux (at 1.5 m in Axial Direction) | Dispersion: 13° to 17° |
| Color Co-Ordinates | Class ‘C’ OF BS 1376-1974 |
| Operating Temp & Electrical Safety | -10°C to 70°C (RH UPTO 90%) | Dielectric Strength: > 100 MΩ |
| H.V. Breakdown Test | 1.5 kV applied between all current carrying shorted together and Earth for 1 minute |
| Guaranteed Off Voltage & Detection | Guaranteed Off Voltage: Below 70V | LED Failure Detection: Before light output drops lower than 50% of nominal |
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