BS EN 50633:2016

What is BS EN 50633 - Protection principles for AC and DC electric traction systems about?  

BS EN 50633 is a European standard that discusses protection principles for AC and DC electric traction systems in railways to ensure safety from hazards due to AC and DC electric traction systems.  

BS EN 50633 applies to the electrical protection system, provided for AC and DC electric traction systems.  

BS EN 50633 is a European standard that: 

• Establishes railway specific protection principles 
• Describes the railway specific protection system functionality 
• Specifies minimum functional requirements and informative examples of their application 
• Establishes limitations of the protection system and the acceptability of residual risks 
• Specifies principles for conformity assessment 

BS EN 50633 applies to: 

• Railways 
• Guided mass transport systems, such as tramways, elevated and underground railways, mountain railways, trolleybus systems, and magnetically levitated systems which use a contact line system 

BS EN 50633 may also be applied to electrified road traffic with a contact line, such as truck-trolley systems and o new electric traction systems and may be applied to changes of existing systems. 

Note 1: BS EN 50633 does not apply to: 

• Underground mine traction systems 
• Cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g., Exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system 
• Suspended cable cars 
• Funicular railways 
• Magnetically levitated systems (without a contact line system) 
• Railways with an inductive power supply without a contact system 
• Railways with a buried contact system that is required to be energized only below the train to ensure safety 

Note 2: BS EN 50633 does not cover: 

• Technical requirements for products, e.g., protection devices 
• Rules for maintenance of protection systems 

Who is BS EN 50633 - Protection principles for AC and DC electric traction systems for? 

BS EN 50633 on the protection principles for AC and DC electric traction systems is useful for: 

• Railway’s regulatory authorities 
• Technical or maintenance staff for AC and DC electric traction systems 

Why should you use BS EN 50633 - Protection principles for AC and DC electric traction systems? 

DC electrification system encompasses many advantages, such as apace and weight consideration, rapid acceleration and braking of DC electric motors, less cost compared to AC systems, less energy consumption and so on. An AC traction system has become more popular nowadays and is more often used in traction systems due to its several advantages such as quick availability and generation of AC that can be easily stepped up or step down, easy controlling and so on. 

BS EN 50633 guideline assist you with electrical installations fed by the electric traction system, system requirements, protection reliability methods, speed of protection, economic feasibility, description of the protection system, specific requirements of different systems, AC systems, power conversion infeed, line feeder, line feeder, autotransformer, DC systems, power conversion infeed, line feeder, line feeder, and frame leakage protection for protection principles for ac and dc electric traction systems.  

BS EN 50633 also provides guidance on limitations, residual risk, and assessments for protection principles for ac and dc electric traction systems.  

With compliance and obedience to BS EN 50633, you can establish proper protection principles for AC and DC electric traction systems and assist you to meet minimum functional requirements for the AC and DC electric traction systems.