Application
This unit involves the skills and knowledge required to design switchboards rated for high fault levels (greater than 400 ampere (A)). It includes preparing and developing switchboard design and obtaining approval for switchboard design. It also includes designing schemes for protection of persons and property; correct functioning and compatibility with the supply; and arrangement of circuits. It also includes determination of fault levels, effective switchgear, control gear, and protection against over-current, over and under-voltage, and wiring based on calculations to meet required safety and performance standards and functional requirements. No licensing, legislative or certification requirements apply to this unit at the time of publication. |
Elements and Performance Criteria
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. | ||
Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified, obtained and applied | |||
Scope of the switchboard is identified from design brief | |||
Switchboard safety and regulatory requirements are identified, obtained and applied | |||
Design development work is planned in consultation with relevant person/s involved with the work to meet scheduled timelines | |||
Relevant performance standards, compliance methods and electrical equipment are applied to switchboard design in accordance with relevant industry standards | |||
Alternative switchboard design/s is developed in accordance with the design brief | |||
Safety, functional and budgetary considerations are incorporated in switchboard design | |||
Switchboard design draft is checked in accordance with design brief and relevant industry standards | |||
Switchboard design is documented for submission to relevant person/s for acceptance and approval | |||
Unplanned situations are dealt with in accordance with workplace procedures | |||
Switchboard design is documented and presented to client representative and/or relevant person/s | |||
Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures | |||
Final design is documented and approval obtained from relevant person/s | |||
Quality of work is monitored in accordance with workplace procedures and relevant industry standards | |||
Evidence of Performance
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include: |
developing outlines of alternative designs developing the design within the safety and functional requirements and budget limitations documenting and presenting design effectively successfully negotiating design alteration requests obtaining approval for final design dealing with unplanned events applying performance standards, compliance methods and electrical equipment to switchboard design applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures consulting with relevant person/s in planning design work identifying scope of switchboard design brief monitoring quality of work planning to meet scheduled timelines preparing to design switchboards. |
Evidence of Knowledge
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of: |
switchboard design of low voltage (LV) switchboards rated for high fault currents, including: trade calculations encompassing: mathematical techniques relevant calculations linear measurement, areas, volumes and ratios engineering mechanics encompassing: base physical quantities concepts, principles, International System of Units (SI) units, their applications in engineering calculations in relation to physical quantities and associated formulae mass, velocity, acceleration, force, weight, density and angles energy/work/power moments/torque centre of gravity mechanical advantage levers pulley blocks efficiency friction vectors resolution of forces forces in strung conductors forces on poles and towers determination of sag pressure/stress elementary fluid mechanics engineering materials encompassing: classification ferrous and non-ferrous metals steels and alloys properties tensile strength temperature and expansion in metals stress and strain ductility applications corrosion galvanic corrosion hardwoods and soft woods fault current calculations encompassing: calculation of fault currents calculation/determination of positive, negative and zero sequence impedances determination of fault current breaking and let-through energy capacities of protection devices the influence of fault/arc impedances impedances operative for phase-to-phase and phase-to-earth faults calculation of fault currents for phase-to-phase and phase-to-earth faults approximation calculations by selecting the components with the major impedance problem-solving techniques relevant manufacturer specifications and operating instructions relevant job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace quality, instructions, policies and procedures. |
Assessment Conditions
Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment. Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment. Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions. Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate. Resources for assessment must include access to: a range of relevant exercises, case studies and/or simulations relevant and appropriate materials, tools, facilities and equipment currently used in industry resources that reflect current industry practices in relation to designing switchboards rated for high fault levels applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals. |
Foundation Skills
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency. |
Range Statement
Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide. | |
Designing a > (greater than) 400 A three phase, 20 kilowatt (kw) fault level switchboard must include at least the following: | control for essential and general supply metering sub-main controls local final sub-circuit distribution board fault indicators |
Sectors
Electrotechnology |
Competency Field
Electrical |