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 working safely near live electrical apparatus as non electrical worker. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TEL14A Power Line Safety – Non Electrical Workers Evidence shall show an understanding of power line safety – non electrical workers to an extent indicated by the following aspects: T1 Basic electrical principles encompassing: Fundamental units - basic measurement of units Electrical characteristics of material: characteristics of solid materials, insulators; terms electrical charge, electrical current, electromagnetic forces Nature of electrical current and change - basic rules of electrical current flow Sources of Electricity: basic fundaments of alternating current, direct current and single EMF source (induction) A simple circuit - circuit protection devices used on the network, effects of an open circuit, a closed circuit and a short circuit and earthing – using the ground as a form of conductor to return current back to a source Resistance - relationship between voltage and current and resistance (Ohms Law) Effects of current - physiological effects and protection for physiological effects; basic principle by which electrical current can result in the production of heat, light and electromagnetic fields and typical effects of current. Three phase and single phase power systems: star delta configurations, three phase star connections, relationship between line and phase voltages, three phase 4 wire systems - purpose of the neutral Consequences of short circuits - arc flash, ESI Protection schemes Magnetism - magnetic field patterns, concepts of electromagnetism, effects of electromagnetism and magnetic fields around straight conductors Hazards encountered in an ESI environment - touch and step potentials, electric shock, fire, chemicals, falls, safe use of tools and equipment. T2 Transmission, distribution and rail power systems encompassing: Relationship between the transmission, distribution and rail/tram system within an overall power system - different organisations responsible for generation, transmission, distribution and rail/tram and, how they correlate and their functions Characteristics of a transmission, a distribution and a rail system - principal components, typical voltage levels and methods of transmission and distribution including grid type transmission systems, radial, parallel and ring main feeders Relationship between an overhead and underground supply systems within an overall power system - advantages/disadvantages, applications. Single line drawings and layouts - drawings and layouts of transmission and distribution systems including, radial, parallel and ring main feeders and the HV equipment associated with substations T3 Fundamentals for working safely near live electrical apparatus for non-electrical worker encompassing: Standards, guidelines/codes of practice, State/Territory/local government legislation, supply authority regulations and or enterprise requirements including relevant certification and licensing, applicable to working safely up to the defined “safe working zone” near energised electrical apparatus (inc. electrical powerlines) for non-electrical worker Definitions of terminologies - ‘safe working zone’, ‘risk assessment’, ‘safe approach distances zones’, ‘safe working distances’,’ work permits’, access authorisation permits’, ‘Technical standards’, ‘isolation procedures’ and compliance requirements’ OHS policies and procedures for working safely - duties of a safety observer, permit to work systems and isolation procedures, safe application of different types of tools and equipment and operation of mobile plant and machinery (e.g. EWP) near live electrical apparatus Techniques and precautions in undertaking different work functions and working safely up to the defined “safe working zone” near energised electrical apparatus (inc. electrical powerlines) for non-electrical worker (work functions that may be performed include, vegetation control, scaffolding, rigging, painting, and/or any other activity that requires working safely near live electrical apparatus by a non-electrical worker) |