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 commissioning network protection and control systems (complex). All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TTS36A Complex network protection and control systems - commissioning Evidence shall show an understanding of complex network protection and control systems – commissioning to an extent indicated by the following aspects: T1 Principles of Statutory and safety considerations encompassing: Commonwealth/State/Territory legislation, standards, codes, supply authority regulations and or enterprise requirements associated with working on High Voltage Particular reference to State and Territory regulations regarding - working near energised conductors, electrical access, heights, confined space, testing procedures, licensing rules. T2 Electrical equipment associated with protection and control schemes encompassing: Types and applications of electrical equipment – characteristics, capabilities (schemes: overcurrent, frame leakage, cooling, buchholz, DC supplies, restricted earth, sensitive earth fault, CB fail, reclose, DC frame leakage, CEL Fail, under frequency load shed and earth fault) T3 Principles of isolation and tagging procedures associated with protection testing encompassing: Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with the installation, maintenance, isolation and tagging procedures Requirements for the use of, isolation and tagging, manuals, system diagrams/plans and drawings Techniques in documenting isolations Techniques in appropriate isolation and tagging procedures as per Commonwealth/State/Territory legislation, supply authority regulations and enterprise standards Techniques in the installation and maintenance procedures protection devices as per Commonwealth/State/Territory legislation, supply authority regulations and enterprise standards T4 Maintenance and commissioning procedures associated with discrete protection schemes encompassing: Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with the maintenance and commissioning procedures Requirements for the use of maintenance and commissioning manuals, system diagrams/plans and drawings Techniques in maintenance and commissioning procedures – planning, policy, testing techniques Close out requirements T5 Relay manufacturer specifications encompassing: Standards, codes, Commonwealth, State/Territory and local government legislation, supply authority regulations and or enterprise requirements applicable to the use and application of relay manufacturer specifications Requirements for the use of relay manufacturer manuals, system diagrams/plans and drawings Types, function and characteristics of specific relays - differences between specific relays used for the same functionality T6 Safe handling and/or disposing of insulation materials used in power distribution devices, which are potential environmental pollutants encompassing: Standards, codes, Commonwealth, State/Territory and local government legislation, supply authority regulations and or enterprise requirements applicable to the handling and disposing of insulation or heat dissipation materials used in power distribution devices Identification of environmental issues associated with the handling and disposing of insulation materials Safety precautions when handling and disposing of heat dissipation materials - safe working practices, Occupational Health and Safety hazards and precautions, identification of hazards, assessing and controlling risks, types, selection, maintenance and uses of personnel protective equipment, permit to work systems and isolation procedures, types and function of specialised equipment, safe working practices when using specialised equipment, emergency response and rescue including First Aid etc. Techniques in the handling and disposing of insulation materials - Polychlorinated Bi-Phenyls (PCB’s), asbestos, insulating Oil, SF6 gas. T7 Procedure to undertake a visual inspection of a scheme encompassing: Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with visual inspection procedures of a scheme Requirements for the use of manuals, system diagrams/plans and drawings Identify obvious deficiencies in operating to the standard functionality Techniques in determining relay malfunction - targeting Techniques in determining wiring defects T8 Operation and maintenance procedures associated with discrete protection and control systems encompassing: Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with operating procedures Requirements for the use of operating manuals, system diagrams/plans and drawings Techniques - gas collection and analysis, bleeding and resetting, calibration, operational and sensitivity checks, trip and alarm checks Surge relay types and uses, including transformer main tanks, diverter switch chambers T9 Commissioning procedures associated with discrete protection and control systems encompassing: Standards, codes, Commonwealth/State/Territory legislation, supply authority regulations and or enterprise requirements associated with the commissioning procedures Requirements for the use of commissioning manuals, system diagrams/plans and drawings Techniques in commissioning procedures – planning, policy, testing techniques, close out requirements. T10 Measurements and the interpretation and analysis of those measurements related to the plant and/or equipment type encompassing: Type of measurements - timing, current, voltage, capacitance, inductance, impedance, phase angle, phase shift, resistance, dielectric dissipation factor, frequency, polarisation index, ratio, vector group, temperature Interpretation and analysis the use of techniques - digital comparison of data, extrapolation, use of graphs and charts, statistics and tables, mathematical calculation of expected values and comparison with manufacturers data and measurements Techniques in the processes involved in follow-up actions and recommendations resulting from analysis and interpretation of results and measurements. T11 Principles of power transformer construction and operations encompassing: Applications of static reactive plant in high voltage networks, including voltage control, VAR control, transient response capacity Types of static reactive plant including high voltage capacitors, high voltage reactors, static VAR compensators and combinations of these Operating characteristics and operational constraints including point on wave switching issues Ratings, cooling systems and control systems and ancillary equipment used Configurations and system layout including single star, double star, bridge type Typical protection systems used including neutral unbalance current, neutral unbalance voltage Techniques used when balancing elements within static reactive plant Safety precautions when testing and maintaining high voltage static reactive plant - safe working practices and procedures, identification of hazards, assessment and control of OHS risks, types, selection, maintenance and use of personal protective equipment. T12 Types and applications of test equipment encompassing: Standards, codes, Commonwealth, State/Territory and local government legislation, supply authority regulations and or enterprise requirements applicable to the use and application of electrical and/or electronic test equipment Types and applications of test equipment used on discrete protection scheme Techniques in the use of test equipment - electronic test equipment (Doble, Ohmnicrome), gas injection equipment, manufactures test equipment, multimeters, phase angle meters, meggers T13 Detailed operation and setting of discrete protection systems encompassing: Earth fault protection - master earth leakage schemes, sensitive earth fault relays and schemes, residual earth fault scheme, core balance earth fault scheme, frame/structure earth leakage scheme, time graded discrimination, backup protection Overcurrent protection - feeder overcurrent protection, instantaneous overcurrent schemes, inverse timed overcurrent schemes, types and location of components of an overcurrent scheme, CT summation, time graded discrimination, backup protection Alarms and controls - auxiliary relays, voltage regulating relays, line drop compensation, gas relay types, gas relay scheme operation and setting, over temperature schemes T14 Detailed operation of interdependent protection systems encompassing: Overcurrent and earth leakage schemes including intertripping, interlocking and blocking - logic mapping, master control, electromechanical, electronic, shading coils Pilot wire, phase comparison - opposed voltage schemes, circulating current schemes, location of components of a scheme, pilot supervisory techniques, Load shedding, voltage control, parallel operation, load rejection Busbar Protection and CB failure protection Reclose systems - applications, single shot, multishot, blocking schemes, synchronisation checking. T15 Detailed operation of complex protection systems encompassing: Distance - characteristics, electromechanical, electronic, impedance, mho, offset mho, switched schemes, non-switched schemes, blocking schemes, bus zone Differential, transformer differential, bus overcurrent - principles, feeder protection, transformer protection, bias systems, harmonic restraint, CT connections, bus protection, low impedance schemes, high impedance schemes, bus overcurrent schemes, generator protection, CT connections, special considerations, digital systems Types of revenue metering Applications of SCADA Complex protection systems for communications Harmonic control Point on wave switching. |