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BS EN 50148:1996 is a British Standard that specifies the safety requirements for railway signalling equipment. The standard covers all aspects of the signalling system, including design, installation, operation, and maintenance, and is intended to ensure the safe and reliable operation of the signalling system.
The standard includes requirements for the signalling equipment's reliability, availability, maintainability, and safety (RAMS). It also includes requirements for the signalling equipment's environmental conditions, such as temperature, humidity, and vibration.
In addition, the standard specifies requirements for the signalling system's interfaces with other railway systems, such as train detection systems, interlocking systems, and train control systems. The standard ensures that the signalling system is compatible with other railway systems and that it operates safely and reliably in conjunction with these systems.
The standard also covers the design and installation of the signalling system's power supply and cabling, as well as the signalling system's software and firmware. It includes requirements for the verification and validation of the signalling system's software and firmware to ensure that it operates as intended and does not pose a safety hazard.
Overall, the standard is designed to ensure that railway signalling systems are safe, reliable, and compatible with other railway systems. This is important for the safe and efficient operation of railways, as well as for the protection of passengers, railway workers, and the general public.
