This unit involves the skills and knowledge required to provide solutions to predictable problems in single path circuits operated at extra-low voltage (ELV) as they apply to energy sector work functions.

It includes working safely; using voltage, current and resistance measuring devices; and providing solutions to predictable circuit problems.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to work on ELV single path electrical circuits

1.1

Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for the relevant work area are identified and applied

1.2

Hazards are identified, risks are assessed, and control measures and workplace procedures are implemented

1.3

Nature of the circuit/s problem is obtained from relevant documentation or work supervisor to determine the scope of work to be undertaken

1.4

Advice is sought from work supervisor to ensure work is coordinated effectively with others

1.5

Materials required for the work are identified and accessed in accordance with workplace procedures

1.6

Tools, equipment and testing devices required for work are obtained and checked for correct operation and safety in accordance with workplace procedures

2

Solve ELV single path electrical circuits problem

2.1

WHS/OHS risk control work measures and procedures are followed

2.2

Need to test or measure live electrical work is determined and conducted in accordance with WHS/OHS, workplace and regulatory requirements

2.3

Circuits are confirmed as being isolated, as required, in accordance with WHS/OHS, workplace and regulatory requirements

2.4

Methodological techniques are used to solve circuit problems using measured and calculated values as they apply to single path, single source circuits in accordance with workplace procedures

2.5

Problems are solved without damage to apparatus, circuits, the surrounding environment or services using sustainable energy practices

3

Complete work and document problem-solving activity

3.1

WHS/OHS risk control measures for work completion are followed

3.2

Worksite is cleaned and made safe in accordance with workplace procedures

3.3

Justification for solutions used to solve circuit problems is documented in accordance with workplace procedures

3.4

Work completion is documented and appropriate person/s notified in accordance with workplace procedures

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 two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including:

checking tools, materials, equipment and testing devices for correct operation and safety

ensuring circuits are isolated

testing or measuring on live circuits and operating systems safely

using risk control measures

applying sustainable energy principles and practices

completing workplace documentation, including documenting problem-solving activities

identifying and accessing relevant materials

maintaining a clean work site and equipment

planning work on extra-low voltage (ELV) single path electrical circuits

referring to relevant documentation to determine the circuit problem

solving problems in ELV single path electrical circuits, including:

altering an existing circuit to comply with specified operating parameters

dealing with unplanned events

developing circuits to comply with a specified function and operating parameters

determining the operating parameters of an existing circuit

dealing with unplanned events.

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:

basic electrical concepts, including:

electrotechnology industry

static and current electricity

production of electricity by renewable and non-renewable energy sources

transportation of electricity from the source to the load via the transmission and distribution systems

utilisation of electricity by the various loads

basic calculations involving quantity of electricity, velocity and speed with relationship to the generation and transportation of electricity

basic electrical circuit, including:

symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram

purpose of each component in the circuit

effects of an open circuit, a closed circuit and a short circuit

multiple and sub-multiple units

effects of electrical current, including:

physiological effects of current and the fundamental principles listed in AS/NZS 3000 for protection against this effect

basic principles by which electric current can result in the production of heat, the production of magnetic fields, and a chemical reaction

typical uses of the effects of current

mechanisms by which metals corrode

fundamental principles listed in AS/NZS 3000 for protection against the damaging effects of current

electromotive force (EMF) sources, energy sources and conversion electrical energy, including:

basic principles of producing an emf from the interaction of a moving conductor in a magnetic field

basic principles of producing an emf from the heating of one junction of a thermocouple

basic principles of producing an emf by the application of sun light falling on the surface of photovoltaic (PV) cells

basic principles of generating an emf when a mechanical force is applied to a crystal (piezo electric effect)

principles of producing an electrical current from primary, secondary and fuel cells

input, output, efficiency or losses of electrical systems and machines

effect of losses in electrical wiring and machines

principle of conservation of energy

resistors, including:

features of fixed and variable resistor types and typical applications

identification of fixed and variable resistors

various types of fixed resistors used in the electrotechnology industry e.g. wire-wound, carbon film and tapped resistors

various types of variable resistors used in the electrotechnology industry e.g. adjustable resistors: potentiometer and rheostat, light dependent resistor (LDR), voltage dependent resistor (VDR), negative temperature dependent resistor (NTC) positive temperature dependent resistor (PTC)

characteristics of temperature, voltage and light dependent resistors and typical applications of each

power ratings of a resistor

power loss (heat) occurring in a conductor

resistance of a colour coded resistor from colour code tables and confirm the value by measurement

measurement of resistance of a range of variable resistors under varying conditions of light, voltage and temperature conditions

Ohm’s law, including:

basic direct current (d.c.) single path circuit

voltage and current levels in a basic d.c. single path circuit

effects of an open circuit, a closed circuit and a short circuit on a basic d.c. single path relationship between voltage and current from measured values in a simple circuit

determining voltage, current and resistance in a circuit given any two of these quantities

graphical relationships of voltage, current and resistance

relationship between voltage, current and resistance

electrical power, including:

relationship between force, power, work and energy

power dissipated in circuit from voltage, current and resistance values

power ratings of devices

measurement of electrical power in a d.c. circuit

effects of power rating of various resistors

relevant electrical regulations and legislations

relevant manufacturer specifications

relevant safe work method statements (SWMS)/job safety assessments or risk mitigation processes

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures

series circuits, including:

circuit diagram of a single source d.c. series circuit

identification of the major components of a series circuit: power supply, loads, connecting leads and switch

applications where series circuits are used in the electrotechnology industry

characteristics of a series circuit - connection of loads, current path, voltage drops, power dissipation and effects of an open circuit in a series circuit

the voltage, current and resistances or power dissipated from measured or given values of any two of these quantities

relationship between voltage drops and resistance in a simple voltage divider network

setting up and connecting a single-source series d.c. circuit

measurement of resistance, voltage and current values in a single source series circuit

effect of an open circuit on a series connected circuit

sustainable energy principles and practices

techniques to confirm that a circuit is isolated

techniques to check if tools, equipment and testing devices are operating correctly and safely.

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 workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated 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 other simulations

relevant and appropriate materials, tools, equipment and personal protective equipment (PPE) currently used in industry

applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

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.

Solving problems in ELV single path circuits must include three of the following types of circuit problems:

identifying and locating open circuits

identifying and locating short circuits

identifying loss of supply

Electrotechnology

Cross Discipline