8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and installing and maintaining trackside signal and train protection equipment. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EN111A Trackside signal and train protection equipment installation and maintenance Evidence shall show an understanding of trackside signal and train protection equipment installation and maintenance, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: Rail signalling principles, electrical Overview of electrical rail signalling encompassing: Types of rail signalling / safeworking systems Note: Systems include: CTC, automatic, controlled and interlocked signalling. Advantages of electrical over mechanical signalling Advantages of CBI over electrical signalling systems Effects of overhead traction systems on electrical signalling systems (where applicable). Purpose of elements of an electrical rail signalling systems. Note: Elements include signals and aspect systems, train protection systems, point actuating systems, mechanical locking, relay interlocking, computer based interlocking, train detection systems, control input devices, indicators, diagrams and monitors, and safe working systems. Rail signalling principles, mechanical Overview of mechanical rail signalling encompassing: Types of mechanical rail signalling systems for different rail traffic Note: Rail traffic may include: passenger train, freight train, maintenance vehicles, heritage/tourism train. Deficiencies of mechanical signalling systems Note: Mechanical systems may include: automatic, controlled and interlocked signalling. Effects of overhead traction systems on mechanical signalling systems (where applicable) Effects of external factors on the mechanical rail signalling system. Note: Factors may include: rail overhead , gradients/terrain, environmental and civil configuration. Purpose of elements of a mechanical rail signalling systems encompassing: Note: Elements include signals, point actuating systems, locking and train detection systems, control input devices, indicators, diagrams and monitors, mechanical interlocking frames, safe working systems and electro-mechanical interfaces. Rail signalling, signal equipment Equipment and their components encompassing: Incandescent lamps LED lamps Electro-Mechanical Mechanical. Note: Including interfacing to different interlocking systems, E.g. relay and CBI Operating principles and parameters encompassing: Automatic signal control circuits Controlled signal control circuits Approach control circuits Bi-directional block control circuits Lamp proving circuits Failure mode Interpreting circuits diagrams to evaluate correct operation and relationship to other signalling circuits Correct operation in accordance with control and locking tables. Servicing procedures encompassing: Maintenance documentation Coordination/planning sequence Operational test procedures Scheduled/corrective maintenance Unscheduled/preventative maintenance Certifying signal equipment (commission and de-commission). Note: Certifying procedures are only applicable for compliance with rail operator and/or enterprise standards. Rail signalling, train protection equipment Equipment and their components encompassing: Electro-mechanical (E.g. trainstops) Electro-magnetic (E.g. AWS) Electronic (E.g. TPWS) ATP system - Balise/beacon based (E.g. ETCS Level 1, and Westect). Note: include concept of interface to on-board system. Operating principles encompassing: Permissive operation Restrictive operation Failure modes Interpreting circuits diagrams to evaluate correct operation and relationship to other signalling circuits Correct operation in accordance with control and locking tables. Servicing procedures and parameters encompassing: Maintenance documentation Coordination/planning sequence Operational test procedures Scheduled/preventative maintenance Unscheduled/corrective maintenance Certifying train protection equipment (commission and de-commission). Note: Certifying procedures are only applicable for compliance with rail operator and enterprise standards. |