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 assembling and wiring internal electrical rail signalling equipment. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EN102A Install electrical rail signalling equipment Evidence shall show an understanding of internal electrical rail signalling equipment assembly and wiring, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Rail signalling principles, mechanical encompassing: Overview of mechanical rail signalling Purpose of elements of a mechanical rail signalling systems - signals, point actuating systems, locking and train detection systems, control input devices, indicators, diagrams and monitors, interlocking, and safe working systems. T2. Rail signalling, regulations and codes encompassing: Codes philosophy and format How to read and apply a code Codes that apply to rail signalling Note: Codes are relevant to a particular rail network. T3. Technical manuals and catalogues encompassing: Typical format How to read and apply information T4. Electrical safe working practices encompassing: Risk management and assessment of risk: Principle and purpose of risk management, and Processes for conducting a risk assessment Hazards associated with low-voltage, extra-low voltage and high-currents: Arrangement of power distribution and circuits in an electrical installations Parts of an electrical system and equipment that operate at low-voltage and extra-low voltage, Parts of an electrical system and equipment where high-currents are likely. Risks and control measures associated with high-voltage: Parts of an electrical system and equipment that operate at high-voltage, The terms ‘touch voltage’, ‘step voltage’, ‘induced voltage’ and ‘creepage’ as they relate to the hazards of high-voltage, and Control measures used for dealing with the hazards of high-voltage. Optical fibre safety: Coherent optical sources and joining procedures Laser safety class 3a devices or their replace Risks and control measures associated with low voltage: Risks associated with modifying electrical installations, fault finding, maintenance and repair. Control measures before, while and after working on electrical installations, circuits or equipment. Isolation and tagging-off procedures. Risks and restrictions in working live. Control measures for working live. Risks and control measures associated with harmful dusts and airborne contaminants - thermal insulation, fibrous cement materials and asbestos and other fibre reinforced switchboard materials. Safety, selection, use, maintenance and care of test equipment: Safety characteristics of electrical testing devices, Safe use of electrical testing device, and Checks and storage methods for maintaining the safety of testing devices. T5. Rail safe working practices encompassing: Rail enterprise safety standard and procedures Rail safe working requirements Possessions protection and management T6. Rail signalling, drawings and diagrams encompassing: Drawing types and applications encompassing: Drawing layouts and conventions. Drawing symbols Cable and equipment schedules T7. Rail signalling, mechanical equipment encompassing: Equipment and their components Operating principles Servicing procedures. T8. Rail signalling, electro-pneumatic equipment encompassing: Equipment and their components Note: Examples include compressors, air lines, control valves Operating principles and parameters Servicing procedures. T9. Inverters encompassing: Features and characteristic of inverters under load and no-load characteristics - circuit configuration, input and output wave forms, relationship between input and output voltages and output voltage under load conditions. Faults in inverters Typical applications of inverters T10. Linear and switch mode power supplies encompassing: Operation and characteristics of switched mode power supplies Isolation requirements and circuitry Operation of step-down and step-up regulators DC to DC converters Operation of variable frequency and pulse width modulated regulation techniques Radiation suppression circuitry Diagnostic procedures to isolate faults |