Fuse Auto Changeover System
RDSO / Spec No.
RDSO/SPN/209/2012 Rev 1.0
Application
Indian Railways (S&T Sector) - Continuous Fuse Monitoring & Automatic Circuit Switching in Railway Signalling
Product Specifications & Details
The B Type Choke manufactured by General Auto Electric Corporation (GAEC) is specifically engineered for DC Track Circuits used in Railway Signalling. Designed in strict compliance with RDSO Specification No. IRS/S/65/83, this unit serves as a vital protective device for DC track circuits operating on 25 KV, 50 Hz AC electrified train routes. It provides high impedance against AC signals while DC is superimposed on the track, featuring a robust, air-cooled construction designed to withstand demanding railroad environments.
Key System Features
- Track Circuit Protection: Engineered specifically as a protective device for DC track circuits in 25 KV, 50 Hz AC electrified territory.
- High Impedance Performance: Delivers high impedance with DC superimposed on the track circuit.
- Air Cooled Design: Efficient natural air cooling mechanism without requiring active cooling fluids.
- Heavy-Duty Construction: Built with a rugged enclosure suited for severe railroad environmental conditions.
- RDSO Approved: Fully compliant with RDSO standards for Indian Railways signalling.
Technical Specifications Table
| Parameter | Specification Standard |
|---|---|
| Resistance | 3 Ω ±5% at 15°C |
| Impedance |
• >150 Ω with 50 mA 2.5 Hz AC • >120 Ω with 2.5 amp DC superimposed on 50mA AC |
| Temperature Rise | < 55°C above ambient at 2.5ADC |
| Operating Temperature | -10°C to 50°C; RH < 90% (Non-condensing) |
| Induced High Voltage Test | 500 V AC at 200 Hz |
| Insulation Voltage | 2 kV between Coil & Earth for one minute |
| Insulation Resistance | > 100 MΩ |
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