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 testing and maintaining metering schemes All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies KSTTSA Metering schemes testing and maintenance KS01-TTS25A Metering schemes – testing and maintenance Evidence shall show an understanding of metering schemes testing and maintenance to an extent indicated by the following aspects T Principles of Statutory and safety considerations encompassing CommonwealthStateTerritory 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 T Procedure to undertake a visual inspection of a scheme encompassing Standards codes CommonwealthStateTerritory legislation supply authority regulations and or enterprise requirements associated with visual inspection procedures of a scheme Requirements for the use of manuals system diagramsplans and drawings Identify obvious deficiencies in operating to the standard functionality Techniques in determining device malfunction Techniques in determining wiring defects T Procedures for the location and rectification of faults in electrical equipment up to volts AC and or volts DC encompassing Relationship of Occupational Health and Safety to the location and rectification of faults in electrical equipment Act and regulations identification of personal safety workplace hazards working with electrically operated tools and equipment emergency First Aidresuscitation rescue from a live electrical situation enterprise policies and procedures Types of drawings differentiation between symptoms faults and causes in malfunctioning equipment faultfinding techniques and procedures Fundamental electrical concepts effects of current practical resistors sources of EMF series parallel and seriesparallel circuits electrical measurement capacitors inductors magnetism Fundamentals of general appliances basic principles of appliances non mathematical appliance identification appliance ratings basic principles of operation of control equipment and protection devices fault conditions and symptoms safe isolation procedures test equipment safe testing procedures including continuity fault types in appliances faultfinding procedures prescriptive Fundamentals of single phase induction motors basic principles of operation non mathematical motor identification motor ratings basic principles of operation of control equipment and protection devices fault conditions and symptoms safe isolation procedures test equipment safe testing procedure including continuity fault types in phase splitting and universal type motors faultfinding procedures prescriptive Fundamentals of three phase induction motors basic principles of operation non mathematical motor identification motor ratings motor starter principles basic principles of operation of control equipment and protection devices fault conditions and symptoms safe isolation procedures safe testing procedure faultfinding procedures prescriptive Fundamentals of single and three phase electrical heaters basic principles of operation types of electrical heaters electrical heater identification electrical heater ratings basic principles of operation of control and protection devices fault conditions and symptoms safe testing procedure faultfinding procedures prescriptive T Detailed operation of metering devices and principles encompassing Common circuit configurations Meters and measurement principles Instrument transformer application Testing of metering systems and devices Implications of market operation T Detailed operation of metering test equipment encompassing Care and safe use Operating principles Comparison of different operating principle meters used for the same purpose Accuracy and loading effects of meters measurements of voltage current power reactive power phase angle resistance inductance capacitance impedance frequency harmonics and the use of transient and data logging devices T Disconnection and reconnection procedures for fixed wiring electrical equipment up to volts AC and or volts DC encompassing Safe electrical work practices and procedures according to standards such as ASNZ or equivalent Safe use of tools and plant Safe use of ladders and elevated work platforms Safe use of protective clothing Hazards in the electrical work environment shock hazards fire hazards chemical hazards other hazardous areas Special situations Procedures for dealing with fires associated with electrical equipment Procedures for dealing with PCBs Electric shock victim rescue methods and procedures basic First Aid treatment for shock burns and bleeding Purpose of each procedure and application expired air resuscitation EAR external cardiaccompression ECC cardiopulmonary resuscitation CPR combined application of EAR and ECC purpose of each procedure and application Components of a basic electrical circuits source control protection load Types of circuit diagrams symbols conventions interpretations free sketches Types of circuit connections and functions open circuit closed circuit short circuit Techniques in basic electrical measurement use of multimeters use of ammeter use of voltage measuring and indicating devices testing of measuring instruments care of measuring instruments voltage current and resistance measurement estimating values of voltage current and resistance using ohms law Fundamental principles of electrical concepts effects of current practical resistors sources of EMF simple practical circuit series parallel and seriesparallel circuits electrical measurement capacitors inductors magnetism Techniques in insulation resistance measurement and requirements Earthing principles and systems T Disconnection and reconnection procedures for fixed wiring electrical equipment up to volts AC and or volts DC encompassing Methods for testing insulation resistance continuity of prospective earthing conductor continuity between exposed conductive parts and the earthing system Methods of recognising acceptable test results for compliance with safety requirements Methods of recognising unacceptable test results and require an appropriate qualified person to further investigation Cable types and conductor termination methods and techniques conductors solid stranded and flexible colour codes Single and three phase systems and loads number of active and live conductors required line and phase voltage typical loads Identification and rating of general appliances Single phase induction motors motor identification motor ratings direction of rotation Three phase induction motors motor identification motor ratings direction of rotation Single and three phase heaters types of heaters heater identification heater ratings Electrical distribution arrangement power systems within premises purpose of switchboardsdistribution boards residual current devices and ELCBs Circuit isolation and protection devices Isolation procedures work clearance testing for voltage lockoff and tagging techniques in isolation and tagging regulation codes of practice and procedures Disconnection procedures practices and requirements Types of replacement equipment Methods of ensuring equipment is safe to connect to supply Methods of reconnection procedures practices and requirements Methods of return equipment to service T Effects of harmonics encompassing Characteristics and effects of harmonics on protection device functionsmalfunction Effects of harmonics on transformers generators motors quality of supply T Procedure for the systematic fault isolation through the application of diagnostic techniques encompassing Principles of analytical questioning Techniques in drawing valid conclusions from first observations Concepts of broad firstline testing Consideration ofresponsibility for avoidance of further damage Interpretation of specific test results causeeffect Techniques for isolation to appropriate level halfsplit modulefunction isolation kernel technique substitution diagnostic software requirements for the use of manuals system diagramsplans drawings handbooks specifications and fault pathways Softwarefirmware functions awareness Factors affecting field versus workshop repair costs Scheduling minormajor repair activities downtime Implications of temporary repairs Use of system knowledge and history Data interpretation expected versus actual Feedback to designproductioninstallation processes Subsystems and system structures System signalsstatus indicators Known failure modes and trends Action threshold warnings versus catastrophic failure Component ratingsupgrades Disassemblyreassembly techniques and care Relative costs of repair and replacement remaining life ongoing maintenance additional benefits of replacement equipment eg improved productivity quality |