8) Essential Knowledge and Associated Skills (EKAS): This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of drafting and laying out an underground distribution extension All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TDS32A Power system underground distribution extension Evidence shall show an understanding of the power system underground distribution extension to an extent indicated by the following aspects: T1 Installation of underground cable encompassing: Requirements for the use of enterprise construction manuals, system diagrams/plans and drawings Safety precautions specific to the installation of underground cable - excavation and trench safety regulations, gas detection procedures, working in confined spaces, personal protective equipment, hazards for the use of LPG equipment for jointing of underground cable, gas bottle testing procedures, permit to work systems and isolation procedures. Trench excavation and reinstatement procedures Installation of underground cable procedures - types of tools and equipment, methods of installing conduits, methods of installing cables and sealing cable ends (direct buried, ducts cleated and racked) Procedures for the safe use of LPG equipment for cable jointing. T2 Construction and types of underground cables encompassing: Safety precautions specific to handling underground cables Requirements for the use of enterprise manuals, system diagrams/plans and drawings Types and applications of UC Construction types and structures of underground cables Characteristics of different types of underground cables Ratings. T3 Enterprise specific switching diagrams and drawing encompassing: Types and application of enterprise specific switching drawings and documents - wiring and schematic diagrams and switching symbols, mechanical drawings dealing with switching operations, project charts, switching schedules, graphs, technical manuals and catalogues, instruction/work sheets. Interpretation of different system switching diagrams - LV system switching diagrams, DC traction supply sectioning diagrams, HV transmission and distribution system symbols and feeder plans, processes of updating switching diagrams. T4 Power distribution network documentation encompassing: Requirements for the use of manuals, system diagrams/plans and drawings and for plans such as work method statements for the control of OHS risks Types and application of power distribution network documentation drawings and documents - wiring and schematic diagrams, drawings and switching symbols, mechanical drawings dealing with the power distribution network, project charts, schedules, graphs, technical manuals and catalogues, instruction/worksheets sheets. Interpretation of different diagrams and documentation on LV and HV systems - overhead distribution extensions, underground distribution extensions, distribution substation, street lighting system. T5 Fundamentals of surveying for the purpose of producing an overhead or underground distribution extension encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply and aviation authority regulations and or enterprise requirements applicable to the surveying for an overhead and underground extension Techniques in measuring heights and distances Techniques in taking bearings angles of deviation using a compass Techniques in using a clinometer Techniques in recording and storage of data Requirements for the use of overhead line construction manuals, system diagrams/plans and drawings Techniques in plotting long spans - measuring stick, clinometer, trundle wheel, tapes, correction for sloping ground, distance across objects and range rods Techniques in pegging pole positions - foot path alignments, types of pegs, pegs of other authorities and locating survey pegs T6 Fundamentals of computer aided drafting (CAD) for drafting and layout of distribution extension and upgrades encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply authority regulations and or enterprise requirements applicable to the drafting and layouts of distribution extensions and upgrades Types of computer hardware and software, tools and equipment for the production of a draft and layout of distribution extension and or upgrade Techniques in storing and retrieving programs and files from the computer Identification and methods of retrieving and manipulating, digital symbols, designs, layouts, fonts and graphs stored in the computer Techniques in using the CAD package in following necessary commands and protocols in accordance with the operating instructions of the CAD software manufacturer Note: Examples include using file structure, menu utilisation, system library usage, data banking, achieving, file management and maintenance procedures Calculation of dimensions and drafting measurements using the computer Techniques in the preparation of preliminary sketches using the computer Techniques in using 2D computer graphics system and associated equipment to produce a distribution extension and or upgrade draft or layout Techniques to diagnosing basic faults in computer operation T7 Layout principles for underground mains distribution extension encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply authority regulations and or enterprise requirements applicable to underground mains distribution extension Requirements for the use of underground mains construction manuals, system diagrams/plans and drawings and for plans such as work method statements for the control of OHS risks Methods in determining material, equipment and tool lists - components types and quantity required, spacing of components and equipment, costings of items and components. Purchasing and contractual arrangements to include a requirement to eliminate OHS hazards, minimise risks and provide residual OHS risk information Determination of conductor size, type and route length Resources needed for the laying of conductors Determining the appropriate excavation for the location Determining the size and depth of excavation Determining the trench and pit layout procedures Minimum clearances between conductors Estimation of the duration of underground distribution extension project |