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

Evidence shall show that knowledge has been acquired of safe working practices and diagnosing and rectifying faults in electrical energy supply transmission systems

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

KSTISA Electrical power system transmission faults

KS01-TIS71A Electrical power system transmission faults

Evidence shall show an understanding of electrical power system transmission faults to an extent indicated by the following aspects

T Overview of the transmission system including lines buses transformers and cables Linebus layouts including single and double switching breaker and a half systems and HV crossing methods

T The principles involved in high voltage ac transmission including tower types and configurations choice of towers or poles economic and environmental insulator types and configuration types of conductors their configuration and standard nomenclature Typical line spacing and ground clearances Line ratings based on ambient temperature Conductor terminating and clamping equipment including vibration damping principles and equipment

T The principles involved in dc transmission including the economics harmonic generation VAR requirements and protection difficulties Types of connections and transformer requirements Advantages and disadvantages of dc transmission Typical overseas systems Likely future use in this country

T The principles of operation voltage and current range breaking capacity and field of use of the following types of circuit breakers

bulk oil

small oil volume

air break

air blast

air puffer

vacuum and

SF double pressure and puffer types

T The types of isolators in use Examples include duoroll blade and scissor type

T Circuit breaker auxiliary systems including

high pressure air systems and air storage and handling processes

dc systems including battery types charging and protection systems and earth fault detection systems

SF conditioning storage and handling system

T The characteristics of lines and cables including the calculation of R X and B for different arrangements of conductor Typical values for actual lines Transposition Models based on line length Voltage and line regulation The transmission of power P and VARs Q

T Control of voltage Conditions leading to voltage collapse and system disintegration Effects on the system of highlow volts Voltage control devices including

voltage regulators applied to generators and synchronous phase modifiers

electromagnetic voltage regulators

series and parallel capacitors

OLTC transformers and static Var compensations SVCs

T Range of devices covered by SVCs including

saturated reactor compensations SRs

thyristor controlled reactor compensators TCRs

combined TCRTSCs and

production of waveform distorting harmonics and control devices

T Importance of the location in the system of voltage control devices

T Use of graphical methods to calculate the size of VAr regulating plant

T Types of communication systems including telephone power line carrier dedicated cable microwave links and fibre optics Quantities and signals to be communicated Advantages and disadvantages of the various systems Equipment requirements

T Transient overvoltages in power systems Switching and lightning overvoltages and their effect on different plant items Transient overvoltage control and reduction using surge diverters shield wires and CB are control Insulation systems insulation coordination insulation grading in plant items bushings and capacitor bushings

T Factors leading to the generation of corona Consequences of corona Reduction of corona including conductor bundling grading rings and conductor surface treatment

This provides essential advice for assessment of the unit It 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 Industrys preferred 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 It is recognised that 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 nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal every day 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 shall be met

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

Diagnose and rectify faults in electrical energy supply transmission systems as described in and including

A

Applying logical diagnostic methods

B

Using fault scenarios to test the source of system faults

C

Identifying faults and competency needed to rectify them

D

Rectifying faults in system

E

Verifying that the system operates correctly

F

Documenting fault rectification

G

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

NoteSuccessful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Note:
Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed. In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified.

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 diagnosing and rectifying faults in electrical energy supply transmission 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 primarily intended 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 reassessed 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 unit(s) shall be reassessed in relation to this unit.