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 maintaining energised lines (transmission) using Bare Hand technique on a helicopter platform. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TTP33A Energised transmission lines using Barehand Technique on a helicopter platform Evidence shall show an understanding of working on energised lines for voltages up to and including 500 kV utilising the live barehand work method on a helicopter platform to an extent indicated by the following aspects: T1 Working on energised lines at or above 132 kV using live line bare-hand techniques from a helicopter platform encompassing: Commonwealth/State/Territory legislation, Standards, codes, Commonwealth/State/Territory legislation, supply and aviation authority regulations and or enterprise requirements associated with extra high voltage (EHV) live line bare-hands work form a helicopter platform Safety precautions when working on helicopters - live line minimum approach distances including safe approach for selected helicopter type(s), Occupational Health and Safety hazards and precautions, determination of helicopter platform for task and working environment (i.e. network and relevant aircraft authority), identification of OHS hazards, assessing and controlling risks, types, selection, maintenance, storage and uses of personnel protective equipment, live line access authority/permit systems, disabling auto-reclosing function, ensuring functioning of fault current protective devices, checking integrity of insulation prior to work commencement, types and function of specialised live working equipment and tools, safe working policies, procedures and practices when using/operating specialised equipment and tools, methods of using specialised equipment and tools, work team communication, use of safety observers, pilot briefing requirements, emergency response and rescue including First Aid etc, techniques for working bare-hands on live line extra high voltage from a helicopter platform, aircraft operations induction including flight plan clearances, systems, equipment and communication requirements, types and functions of aerial attachment equipment including appropriate testing, rating and certification. Aircrew familiarisation with live-line systems operations and equipment requirements. T2 Principles of high voltage encompassing: Commonwealth/State/Territory legislation, Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with working on or near High Voltage Electrical and electrostatic principles related to high voltage lines - relationship of current, voltage and resistance as related to transmission lines, relationship of phase voltage and respective line voltages Production of an electric field – units, effect of distance, potential of an object within the field and the effect of distances to the potential HV insulators - construction of a disc insulator, construction of a polymeric insulator, effects of an electrical field on disc insulators, identification of the number of disc insulators needed for a single line voltage, performance of a failed disc insulator on the line and the system, determining the minimum allowable number of discs per string for each line voltage in the system before bare-hand work is to proceed, techniques in detecting a failed disc in a string, techniques in using appropriate tools and equipment to test a string, methods of recording data Effects of electrostatic induction on the human body - relationship of the resistance of a human body to different levels of current and voltage, relationship of a human body to an electric field, effects of electrostatic induction on bare-hand work Application of Faraday’s cage - effects of a body, advantages, description of the Faraday’s cage used by bare-hand live-line workers Safety precautions working on or near High Voltage electrical apparatus - safe approach distances from live line, identification of OHS hazards, assessing and controlling risks, types, selection, maintenance, storage and uses of personnel protective equipment, permit to work systems and isolation procedures, types and function of specialised live working equipment, safe working policies, procedures and practices when using and operating specialised equipment, methods of using specialised equipment, emergency response and rescue including First Aid etc Effects of lighting and switching surges on performance off string insulators - health effects to workers, methods used to alleviate surges on transmission lines Magnetic field - difference between magnetic fields and electrostatic fields, source of magnetic field, techniques in locating, measuring and analysing known sources of magnetic fields, reasons for monitoring magnetic field exposure, techniques used to monitor magnetic fields. T3 Powerline safety practices encompassing: Protective apparatus and apparel for linework - responsibilities for the selection, use, maintenance and storage of protective apparatus and apparel and the types of protective apparatus and apparel used for the line worker Requirements for the use of ladders - carrying, erecting, collapsing and lowering different types of extension ladder against a standing pole, maintenance checks on different types of ladders, renewal of extension ropes and the safety issues relating to clearances from overhead conductors Requirements for climbing and working aloft - methods used to identify a pole is safe to climb, methods used to inspect a line worker’s body belt, application of knots and hitches appropriate to the requirements of a line worker, height safety principles including personal fall protection, prevention and related requirements, and the practical procedure of climbing an overhead structure and fitting a pole chair Traffic management - purpose of traffic management and a line worker’s responsibilities in accordance with relevant statutory requirements and electricity supply industry requirements, demonstration of the procedure used to provide an effective traffic management scheme and the use of a two-way radio Control of small fires - identification, selection and operation of the appropriate extinguishing mediums for various types of fires, general fire prevention methods and the precautions for personal protection when fighting small fires Rescue victims from heights and confined spaces - planning, identifying, the procedures, and establishing responses, developing techniques, involvement of external emergency services and practical demonstration/rehearsals of rescuing a person from heights and from confined spaces and emergency procedures for the rescue of an electric shock victim including CPR Requirements for aerial linework - planning, establishing and implementing relevant aviation authority clearances, determining system requirements, aircrew familiarisation with network operations and equipment, requirements for effective communications operations for aerial work. |