LED Signal Unit for Main Aspect With Integrated Current Regulator
RDSO / Spec No.
RDSO/SPN/199/2010
Application
Indian Railways (S&T Sector) & Metro Rail - Railway Signalling Aspects
Product Specifications & Details
The LED Signal Unit for Main Aspect manufactured by General Auto Electric Corporation (GAEC) delivers high-reliability optical signaling for modern railway and metro networks. Designed in accordance with RDSO Specification No. RDSO/SPN/199/2010, this 110V AC-fed unit features a built-in current regulator, a phantom-free multi-array LED layout, and UV-stabilized lenses for harsh outdoor conditions. It is fully compatible with SSI, Relay Interlocking, and Electronic Interlocking (EI) systems, providing a long service life, low power consumption, and fail-safe performance.
Key System Features
- Built-In Regulation: Integrated current regulator for stable illumination across input variations.
- High Visibility: Minimum 600-meter visibility in clear daylight with peak sunrays at rated voltage.
- Fail-Safe Architecture: Phantom-free multi-array design compatible with SSI and Relay Interlocking.
- Lamp Proving Support: Enables lamp proving via Signal Exchange Relay (ECR) or Electronic Interlocking (EI).
- Aspect Options: Available in RED, YELLOW, GREEN, and VIOLET (used in Metro Rail in place of Yellow).
- RDSO Approved & Weatherproof: Approved by RDSO Lucknow with UV-stabilized housing for outdoor reliability.
Technical Specifications Table
| Parameter | Specification Standard |
|---|---|
| Color of the Unit | RED / YELLOW / GREEN / VIOLET (For Metro Rail in place of Yellow) |
| Power Supply & Variation | 110 V AC, Single Phase, 50 Hz | Input Variation: 82.5V to 137.5V |
| Input Current & Load Regulation | 110 mA to 150 mA (Within 110V ± 20% & -10°C to 70°C) | Load Reg: ± 2% |
| Display Area & LED Count | 125 mm dia ± 1 mm | Min. 60 LEDs (Red/Yellow), Min. 30 LEDs (Green/Violet) |
| Illumination Level | >150 Lux at 1.5 m (Axial) [Red & Green: 150 (-10% to +40%), Yellow: 175] |
| Color Co-Ordinates | RED / GREEN: Class ‘C’ of BS 1376-1974 | YELLOW: Class ‘B’ of BS 1376-1974 |
| Operating Temperature | -10°C to 70°C; RH UPTO 90% |
| Electrical Safety Tests | Dielectric Strength: > 100 MΩ | H.V. Breakdown Test: 1.5 kV applied for 1 min |
| Guaranteed Off Voltage & Failure Detect | Guaranteed Off Voltage: Below 70V | Failure Detection: Before light output drops < 50% of nominal |
Special Application Notes
* VIOLET aspects are utilized specifically for Metro Rail networks in place of standard Yellow aspects, and are not covered under standard RDSO main line specifications.
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