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Evidence Guide: UETTDRIS70A - Diagnose and rectify faults in electrical energy distribution systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

UETTDRIS70A - Diagnose and rectify faults in electrical energy distribution systems

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to diagnose and rectify faults

  1. OHS procedures for a given work area are identified, obtained and understood.
  2. Established OHS risk control measures and procedures in preparation for the work are followed.
  3. Safety hazards which have not previously been identified are documented and risk control measures devised and implemented in consultation with appropriate personnel.
  4. The extent of faults is determined from reports and other documentation and fro discussion with appropriate personnel
  5. Appropriate personnel are consulted to ensure the work is coordinated effectively with others involved on the work site
  6. Tools, equipment and testing devices needed to diagnose faults are obtained in accordance with established procedures and checked for correct operation and safety.
OHS procedures for a given work area are identified, obtained and understood.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Established OHS risk control measures and procedures in preparation for the work are followed.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Safety hazards which have not previously been identified are documented and risk control measures devised and implemented in consultation with appropriate personnel.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

The extent of faults is determined from reports and other documentation and fro discussion with appropriate personnel

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Appropriate personnel are consulted to ensure the work is coordinated effectively with others involved on the work site

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tools, equipment and testing devices needed to diagnose faults are obtained in accordance with established procedures and checked for correct operation and safety.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Diagnose and rectify faults

  1. OHS risk control measures and procedures for carrying out the work are followed.
  2. The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures
  3. Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures
  4. Logical diagnostic methods are applied to diagnose energy supply apparatus faults employing measurements and estimations of system operating parameters referenced to system operational requirements.
  5. Suspected fault scenarios are tested as being the source of system problems.
  6. Source of the fault is identified and appropriately competent persons are engaged to rectify the fault where it is outside the scope of the control system.
  7. Faults in the apparatus components are rectified to raise energy supply apparatus to its operation standard.
  8. System is tested to verify that it operates as intended and to specified requirements
  9. Decisions for dealing with unexpected situations are made from discussions with appropriate persons and job specifications and requirements.
  10. Methods for dealing with unexpected situations are selected on the basis of safety and specified work outcomes.
  11. Diagnosis and rectification activities are carried out efficiently without unnecessary waste of materials or damage to apparatus and the surrounding environment or services and using sustainable energy practices.
OHS risk control measures and procedures for carrying out the work are followed.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Logical diagnostic methods are applied to diagnose energy supply apparatus faults employing measurements and estimations of system operating parameters referenced to system operational requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Suspected fault scenarios are tested as being the source of system problems.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Source of the fault is identified and appropriately competent persons are engaged to rectify the fault where it is outside the scope of the control system.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Faults in the apparatus components are rectified to raise energy supply apparatus to its operation standard.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

System is tested to verify that it operates as intended and to specified requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Decisions for dealing with unexpected situations are made from discussions with appropriate persons and job specifications and requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Methods for dealing with unexpected situations are selected on the basis of safety and specified work outcomes.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Diagnosis and rectification activities are carried out efficiently without unnecessary waste of materials or damage to apparatus and the surrounding environment or services and using sustainable energy practices.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete and report fault diagnosis and rectification activities

  1. OHS work completion risk control measures and procedures are followed.
  2. Work site is made safe in accordance with established safety procedures.
  3. Rectification of faults is documented in accordance with established procedures.
  4. Appropriate person or persons notified, in accordance with established procedures, that the system faults have been rectified
OHS work completion risk control measures and procedures are followed.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Work site is made safe in accordance with established safety procedures.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Rectification of faults is documented in accordance with established procedures.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Appropriate person or persons notified, in accordance with established procedures, that the system faults have been rectified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

9) 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

9.1)

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 Industry’s 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 substance/material 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

9.2)

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 – UET12’. 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:

Diagnosing and rectifying faults in electrical energy distribution systems as described in 8) and including:

A

Applying logical diagnostic methods.

B

Using fault scenarios to test the cause of system faults.

C

Identifying faults and competency needed to rectify them.

D

Rectifying faults in system controls.

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.

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

9.3)

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 learning/assessment 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 distribution systems.

Method of assessment

9.4)

This unit shall be assessed by methods given in Volume 1, Part 3 ‘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 learning/assessment 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

9.5)

For optimisation of training and assessment effort, competency development in this unit may be arranged concurrently with unit:

UETTDRIS67A

Solve problems in energy supply network equipment

Required Skills and Knowledge

8) 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 distribution systems.

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

KS01-TIS70A Electrical power distribution systems diagnostic

Evidence shall show an understanding of diagnosing faults in power distribution systems to an extent indicated by the following aspects:

T1 Distribution system overview including encompassing:

regulatory conditions of supply and utilisation

compliance with Australian Standards.

reticulation system including overhead/underground, urban/rural, HV customers and high-rise building systems. The effects of industrial customers

methods used to ensure continuity of supply.

types of substations in current use.

systems of distribution used, (primary and secondary)

voltage levels, power factor, wave-form distortion and transient loading

supply quality

load curve profiles (residential/industrial/commercial)

types of feeders

distribution systems (urban, rural single-phase systems, SWER, spur, parallel and ring systems etc.)

T2 Overhead lines and installation encompassing:

industry and safety regulations

overhead conductors

conductor material

current rating factors (heating, voltage drops, power losses)

aerial bundled cables (HV and LV)

covered conductors - 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

overhead line poles

types (wood, concrete and steel)

installation of poles (tooling, rake, life, labelling, sinking)

maintenance of poles – above & below ground

pole strength and loads

crossarms

types and standard sizes

insulators

insulation types

types (pin, suspension or disc, shackle)

creepage, necessary clearances

arcing horns, insulator mounting

structure types

mechanical properties (working strength, maximum tension, limiting size)

interpretation of stringing charts

determination of sag (by calculations or measurement and/or tension measurement)

sight and wave sagging, sag correction

stays

components, anchorage

T3 Use of design schedules encompassing:

sample design problems - common design practice line, voltage, structure types used, line deviation, span sag, crossarms, insulators and stays wind loading and line deviation loading basic surveying

measurement of levels, deviation angle and compass bearings

perform survey of short distribution line extension of produce field notes

T4 Underground cables encompassing:

cable types, ratings, core material, design considerations, cable dielectrics, insulating materials and abbreviations, electric stress, cable volt drop and volt drop calculations, cable termination, joints and installation.

induction and eddy currents

cable testing, cable fault location

cable drawing

T5 Voltage regulations of feeders and associated equipment encompassing:

terminology used: distribution system, service line, customer’s terminals, customer voltage, utilisation voltage, base voltage, voltage variation and bandwidth

voltage limits and effects of voltage variation

causes of variation: inductance, capacitance and reactance of distribution lines, transformers

methods of voltage control: off-load, on-load tap changers, voltage regulating relays, line drop compensation, different types of voltage regulators

voltage profiles: principles, effect on voltage profiles, limits of voltage, voltage drops due to LV mains transformers, tapsettings feeder and service lines

determining volt drops for components within the profile.

T6 Control of voltage. Conditions leading to voltage collapse and system disintegration. Effects on the system of high/low volts. Voltage control devices including encompassing:

voltage regulators applied to generators and synchronous phase modifiers

electromagnetic voltage regulators

series and parallel capacitors

OLTC transformers and static Var compensations (SVCs)

T7 Range of devices covered by SVCs including encompassing:

saturated reactor compensations (SRs)

thyristor controlled reactor compensators (TCRs)

combined TCR/TSCs and

production of wave-form distorting harmonics and control devices

T8 Importance of the location in the system of voltage control devices.

T9 Types of communication systems including telephone, power line carrier, dedicated cable, micro-wave links and fibre optics. Quantities and signals to be communicated. Advantages and disadvantages of the various systems. Equipment requirements.

T10 Transient over-voltages in power systems. Switching and lightning overvoltages and their effect on different plant items. Transient over-voltage control and reduction using surge diverters, shield wires and CB are control. Insulation systems, insulation co-ordination, insulation grading in plant items, bushings and capacitor bushings.

T11 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, vacuum and SF6 (double pressure and puffer types).

T12 The types of isolators in use. Examples include duo-roll, blade and scissor type.

T13 Circuit breaker auxiliary systems encompassing:

d.c. systems including battery types, charging and protection systems and earth fault detection systems

SF6 conditioning, storage and handling system

Range Statement

10) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance.

This unit shall be demonstrated in relation to diagnosing and rectifying at least four faults in electrical energy reticulation system.

Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1.