This describes the essential skills and knowledge and their level required for this unit

Evidence must show that knowledge has been acquired of safe working practices and solving basic problems in standalone renewable energy systems

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEKA

Stand alone renewable energy system components

Evidence shall show an understanding of standalone RE system components to an extent indicated by the following aspects

T ELV wiring and circuit protection for renewable power systems encompassing

extra low voltage ELV and low voltage LV circuits in a standalone or grid connected renewable power system and the regulatory restrictions regarding work at each level

earthing requirements for renewable power systems over a range of applications and environments

required sizes for ELV cabling in a renewable power system considering allowable voltage drops and cable current carrying capacity in accordance with ASNZS and AS

Selection of suitable dc circuit protection and isolation for all relevant points in a standalone renewable power system in accordance with ASNZS and AS

T Electrical diagrams for a renewable power system encompassing

functional block diagrams for typical standalone renewable power system configurations

circuit schematic of typical renewable power systems supplying dc andor ac loads including all major components protection devices earthing isolation switching and metering

unit wiring diagram for a typical renewable standalone power system dc control board

architectural and site diagrams to show the locations of equipment fittings and cabling

T Batteries encompassing

major features of each of the major types of commercially available batteries for standalone power system applications including basic chemistry physical structure advantages and disadvantages

factors affecting the life of a battery

processes of sulphation and stratification in lead acid batteries their causes effects and methods of prevention or reduction

effect of depth of discharge and of temperature on the capacity and life of leadacid batteries

major specifications for a leadacid battery in a standalone power system application

main features of charging regimes suitable for the major types of standalone power system batteries using real examples

life of a standalone power system battery in years based on manufacturers cycle life data and given capacity configuration and operating conditions

precautions required when handling installing or maintaining leadacid batteries

procedures required for safe disposal of the major commercially available types of batteries in accordance with AS

T Balance of system components and common loads encompassing

features of commercially available inverters suitable for use in standalone power systems

major operating parameters of an inverter including dc voltage operating window efficiency output voltage waveform and output voltage regulation over a range of loads up to minute ratings

problems that may be caused by nonsine supply voltage waveforms on typical loads and the solutions used to overcome these

significance of low power factor loads for inverter systems and the principle of power factor correction

operation of the major types of regulators for use in standalone renewable power systems using commercially available equipment as examples

current vs voltage characteristics efficiency and charging voltage waveform for a transformerrectifier type and a switchmode type battery charger suitable for use in standalone renewable power systems

operation of and applications for MPPTs for photovoltaic arrays

basic operation advantages and disadvantages of mechanical tracking devices for PV arrays

control parameters or data using digital displays on inverters regulators or controllers

T Basic lighting design encompassing

properties and features of the major lamp types including their suitability for use in standalone PV power systems

effect on room lighting levels of luminaire design and positioning dcor room construction and windows

Selection and sizing of suitable lamps and fittings and their placement in a household taking into account usage lighting levels required by relevant standards and energy efficiency considerations

T Generating sets encompassing

major components in the construction of a generating set

main components of gas petrol or diesel internal combustion engines

basic principle of operation of internal combustion engines including different fuel types and ignition methods

operating characteristics advantages and disadvantages of gensets using different fuel types aspiration methods operating speed and number of cylinders

major methods of mechanical coupling and power transmission between an engine and alternator

function and ratings of mechanical and electronic speed governing systems

basic structure and operation of an alternator

advantages and disadvantages of different types of excitation system and voltage regulation used for genset alternators

components and basic operation of a brushless excitation system in an alternator and the principle of selfexcitation

T Generator set sizing calculations encompassing

major electrical and mechanical ratings which control the performance of a genset

calculations relating to real and apparent power power factor mechanical power voltage regulation and speed droop for single phase gensets

derating factor for a genset given manufacturers derating data and a given set of operating conditions

Selection of a suitable genset given maximum demand and surge loadings and derating factor

Calculation of the fuel consumption of a genset given manufacturers data and operating conditions

This provides essential advice for assessment of the unit and must be read in conjunction with the performance criteria and the range statement of the unit and the Training Package Assessment Guidelines

The Evidence Guide forms an integral part of this unit It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the industrypreferred model for apprenticeships However where summative or final assessment is used it is to include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment In some circumstances assessment in part or full can occur outside the workplace However it must be in accordance with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety issues inherent in working with electricity electrical equipment gas or any other hazardous substancematerial present a challenge for those determining competence Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work have a bearing on the decision as to how much and how detailed the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites must be met

Evidence for competence in this unit must be considered holistically Each element and associated performance criteria must be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence must also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this must incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Solve basic problems in standalone renewable energy systems as described in and including

A

Understanding the nature of the problem

B

Using established routines to solve apparatus problems

C

Providing viable solutions to apparatus problems

D

Documenting justification for the solutions used

E

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in a holistic assessment with the above listed items

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

The resources used for assessment should reflect current industry practices in relation to solving basic problems in standalone renewable energy systems

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note

Competent performance with inherent safe working practices is expected in the Industry to which this unit applies This requires assessment in a structured environment which is intended primarily for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit

The critical aspects of occupational health and safety covered in unit UEENEEEA and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE101A and other discipline specific occupational health and safety units shall be incorporated in relation to this unit.