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Elements and Performance Criteria

  1. Plan for and coordinate the design of customer substations
  2. Carry out and coordinate the design of customer substations
  3. Complete and coordinate the design of customer substations

Required Skills

Essential Knowledge and Associated Skills EKAS This describes the essential skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of designing customer substations

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

KSTDSA Customer power system substations Design

KS01-TDS50A Customer power system substations - Design

Evidence shall show an understanding of designing customer power system substations to an extent indicated by the following aspects

T Substations and power transformers encompassing

Relationship between the substations within an overall power system purpose location in relation to load centres layout of HV equipment within the substation and auxiliary equipment

Characteristics of a power transformer basic construction of distribution transformers operation under loadno load conditions types and basic operation of tap changing switches including solid state types efficiency and cooling

Auxiliary equipment used on transformers function and basic operation

Maintenance of a power transformer basic connections restrictions to parallel operation problems and remedies associated with harmonics testing and fault finding procedures

Characteristics of a reactors description and purpose

T Installation of metering and control equipment encompassing

Standards codes legislation supply authority regulations and or enterprise requirements pertaining to the installation and maintenance of energy meters and associated equipment

Types of meters kilowatthour meters single and polyphase demand meters recording meters and electronic recording metering systems summators

Installation and removal methods direct connection and plug in method enterprise specific

Types of associated equipment and accessories meter boards service fuse links contactors time switch audio frequency injection relay

Testing procedures safety and polarity testing

T High voltage distribution transformer principles encompassing

Operation of HV distribution transformers principle governing factors for transformer ratings protection and alarms operating limitations and the relationship between transformer and HV fuse rating purpose and principle operation of HV distribution transformer tap changers HV distribution transformer and transformer cable combination switching practices paralleling requirements isolation and earthing procedures for access common distribution transformer and associated electrical apparatus faults

HV underground switching equipment arc stranglers switch operation load break elbows switching cubicles canister fuses bayonet fuses F and G switching cubicles voltage indicators and phasing testers

T Feeder automation system encompassing

Function of feeder automation system and the main components

Operation procedure for a remote field device from a local control station

Functions of System Control and Data Acquisition SCADA or any other relevant Data Acquisition and Control systems and its main components

SCADA system security interlocks and access restrictions

SCADA system operation when switching apparatus or retrieving data via a remote access device such as Remote Access Terminal RAT Dial Up Voice Annunciated System and Local Control Station

Function of the main components of a localremote control system

Operation of a field devices using SCADA systems via a Remote Access Terminal RAT Dial Up Annunciated System and Local Control Station

T Layout principles for a distribution substation minor upgrade encompassing

Commonwealth StateTerritory and local government legislation Standards codes supply authority regulations and or enterprise requirements applicable to a distribution substation minor upgrade

Requirements for the use of distribution substation minor upgrade construction manuals system diagramsplans and drawings and for plans such as work method statements for the control of OHS risks

Methods in determining material equipment and tool lists components types and quantity required spacing of components and equipment costings of items and components

Purchasing and contractual arrangements to include a requirement to eliminate OHS hazards minimise risks and provide residual OHS risk information

Determination of conductor size type and route length

Resources needed for the laying of conductors cables and equipment

Determining the appropriate installation sequence

Minimum clearances between conductors and equipment

Estimation of the duration of underground distribution extension project

T Fundamentals of distribution transformers encompassing

Standards codes legislation supply authority regulations and or enterprise requirements pertaining to the safe operation and testing of distribution transformers and auxiliary equipment

Drawing layouts conventions and symbols vector group of transformers and three phase transformers

Construction of a distribution transformer

Characteristics when operated under load and no load conditions

Percentage impedance determinations by test and calculation

Function and operation of tap charging switches including solid state tap changing equipment

Function and operation of transformer auxiliary equipment

Problems caused by harmonics in transformers

Methods and equipment used to overcome harmonics in transformers

T Testing procedures of distribution transformers encompassing

Safety precautions specific to the testing of distribution transformers

Procedures for safely connecting distribution transformers for testing

Testing of distribution transformers to determine losses

Calculation of transformers efficiency

Methods and types of equipment used to cool transformers properties of transformer oil and tests performed on transformer oil

Techniques in performing selected tests on transformer oil

Techniques in performing testing procedures on armer

Techniques in testing distribution transformers

Distribution transformer parallel connections conditions and restrictions for parallel operations and calculations of loading on transformers operating in parallel

Connection of transformer in parallel to supply a common load

Evidence Required

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

The Evidence Guide forms an integral part of this Competency Standard Unit and shall be used in conjunction with all component 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 accord with Industry and Regulatory policy in this regard

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 Hence sources of evidence need to be rich in nature so as 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 practiced 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 is based shall be considered holistically Each element and associated Performance Criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UETUET Evidence shall also comprise

A representative body of Performance Criteria 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 and

Apply sustainable energy principles and practices as specified in the Performance Criteria and range and

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit to such an extent that the learners performance outcome is reported in accordance with the preferred approach namely a percentile graded result where required by the regulated environment and

Demonstrate an appropriate level of employability skills and

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

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

Range of toolsequipmentmaterialsproceduresworkplacesother variables

Group No

The minimum number of items on which skill is to be demonstrated

Item List

A

Completion of six designs in total drawn from at least two of the following project types

Single transformer substation

Multitransformer substations

Upgradealteration to existing assets

Autochangeover systems

B

At least one occasion

Dealing with an unplanned event by drawing on essential knowledge and associated skills to provide appropriate solutions incorporated in the 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 design of customer substations

In addition to the resources listed above in Context of and specific resources for assessment evidence should show demonstrated competency working realistic environment and a variety of conditions

Method of assessment

This Competency Standard 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 Competency Standard Unit applies This requires that the specified essential knowledge and associated skills are assessed 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 associated skills described in this unit

Concurrent assessment and relationship with other units

There are no recommended concurrent assessments with this unit however in some cases efficiencies may be gained in terms of learning and assessment effort being concurrently managed


Range Statement

10) This relates to the unit of competency 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 Competency Standard Unit shall be demonstrated in relation to the design of customer substations and may include the following:

Substations, transformers, HV switchgear, LV switchgear, relevant protection systems, (fuses and circuit breakers), civil works, customer distribution boards.

The following constants and variables included in the element/Performance Criteria in this unit are fully described in the Definitions Section 1 of this volume and form an integral part of the Range Statement of this unit:

Appropriate and relevant persons (see Personnel)

Appropriate authorities

Appropriate work platform.

Assessing risk

Assessment

Authorisation

Confined space

Diagnostic, testing and restoration.

Documenting detail work events, record keeping and or storage of information.

Drawings and specifications

Emergency

Environmental and sustainable energy procedures

Environmental legislation.

Environmental management documentation.

Established procedures.

Fall prevention

Hazards

Identifying hazards

Inspect

Legislation

MSDS

Notification.

OHS practices

OHS issues

Permits and / or permits to work

Personnel.

Quality assurance systems.

Requirements.

Safe design principles

Testing procedures

Work clearance systems