LED Signal Unit for Tunnel Installations
Product Specifications & Details
The LED Signal Unit for Tunnel Installations manufactured by General Auto Electric Corporation (GAEC) is engineered specifically for underground, tunnel, and confined space signaling environments. Compliant with RDSO Specification No. RDSO/SPN/153/2011 Rev. 4.1 (Draft), this 110V AC-fed signal features a compact 85mm display area, built-in current regulation, and LEDs driven well below specified safe limits to significantly extend operating life. Compatible with Electronic Interlocking (EI) and Relay Interlocking, it provides a highly reliable, phantom-free solution available with custom powder-coated enclosures (MS, Stainless Steel, or Aluminium).
Key System Features
- Underground Optimized: Compact 85mm display diameter designed explicitly for low-clearance tunnel layouts.
- Extended LED Lifespan: LEDs are driven well below maximum safe limits to lower heat and maximize component longevity.
- Built-In Regulation: Integrated current regulator for consistent performance across input voltage fluctuations.
- Interlocking & Proving: Operation and lamp proving fully compatible with EI and Relay Interlocking.
- Aspect Range: Available in RED, YELLOW, GREEN, and VIOLET (used for Metro Rail main signals).
- Enclosure Customization: Can be supplied in MS, Stainless Steel, or Aluminium powder-coated housings with full internal wiring.
Technical Specifications Table
| Parameter | Specification Standard |
|---|---|
| Color of the Unit | RED / YELLOW / GREEN / VIOLET (For Metro Rail MAIN Signal in place of Yellow) |
| Power Supply & Variation | 110 V AC, Single Phase, 50 Hz | Voltage Range: 88 V to 132 V AC |
| Input Current & Load Regulation | 112 mA to 168 mA (Within 110V ± 20% & -10°C to 70°C) | Load Reg: ± 2% |
| Display Area & LED Count | 85 mm dia ± 1 mm | Min. 30 LEDs (Red & Yellow), Min. 15 LEDs (Green & Violet) |
| Visibility & Illumination | 200m Min Visibility | 72 – 112 Lux at 1.5 m (Axial) [Red, Yellow, Green] |
| Color Co-Ordinates | RED / GREEN: Class ‘C’ of BS 1376-1974 | YELLOW: Class ‘B’ of BS 1376-1974 |
| Operating Temp & Electrical Safety | -10°C to 70°C (RH UPTO 90%) | Dielectric: > 100 MΩ | H.V. Test: 1.5 kV for 1 min |
| Guaranteed Off Voltage & Detection | Guaranteed Off Voltage: Below 70V | LED Failure Alert: Triggers before output falls below 50% |
Application & Enclosure Notes
* VIOLET signals are used in place of Yellow aspects in Metro Rail installations and fall outside standard RDSO main line specs.
* Complete housing assemblies can be tailored upon customer request using Powder-Coated MS, Stainless Steel, or Aluminium with pre-wired internal terminations.
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