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Elements and Performance Criteria

  1. Plan for and coordinate the design of underground transmission systems
  2. Carry out and coordinate the design of underground transmission systems
  3. Complete and coordinate the design of underground transmission systems

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 underground transmission systems

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

KSTDSA Underground transmission systems

KS01-TDS58A Underground transmission systems

Evidence shall show an understanding of designing underground transmission systems to an extent indicated by the following aspects

T Generation systems encompassing

Methods of generating electricity types of power stations and reasons for their location layout of thermal and hydroelectric power stations

Relationship between power control and load requirements operating speeds for thermal and hydroelectric generating sets typical generator voltage levels and output ratings

The purpose and features of typical types of cogeneration systems

T Transmission structures and hardware encompassing

Requirements for the use of enterprise construction manuals system diagramsplans and drawings

Types of structures

Types and function of associated hardwareequipment and insulators

Types of conductors

Location of transmissions structures

Other equipment used on transmission structures eg aircraft warning devices

Voltages on transmission structures

T Procedures for routine maintenance on transmission structures and hardware encompassing

Procedures for gaining access permits

Reasons for gaining access

Types of maintenance procedures on transmission structures procedure to follow for inspectionpatrols according to the Transmission Supply Authority

Erecting and removing of transmission equipment and hardware from a tower climbing procedures square rigging principles calculation of forces at work within a given square rigging system and construction of a square rigging system

Procedures for changing insulators vertical angle suspension strain insulator post insulator horizontal or vertical and bridge insulator calculation of conductor forces

Installation of temporary work platforms types and function of installation tools and equipment precautions and work methods to follow and procedures for installations of temporary work platforms

Installation of conductor protective hardware types and selection of common dampers tools and equipment control of Aeolian vibration and procedures for the installation of dampers onto conductors

Dead line insulator washing supply Authority regulations and procedure for washing deenergised transmission lines

T Procedures for installation and maintenance on transmission lines structures and hardware encompassing

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

Requirements for the use of enterprise construction manuals system diagramsplans and drawings minimum construction clearances for transmission lines and sagtension requirements

Construction types and structures used in transmission lines

Types sizes and characteristics of transmission conductors aluminium conductors steel reinforced and earthing conductors

Types sizes and characteristics of transmission conductors aluminium conductors steel reinforced and earthing conductors

Types of electrical connections used to connect transmission conductors compression termination and bolted termination

Causes and effects of poor electrical connections

Types and application of specialised tools equipment and hardware for the stringing of transmission conductors

Techniques for stringing tensioning and terminating transmission conductors

Techniques for installation of associated hardware used on transmission towers

Techniques for maintenance of damage transmission conductors repair and replacement

T High voltage switching principles encompassing

Standards codes legislation supply authority regulations and or enterprise requirements applicable to switching of high voltage to a given schedule

Requirements for the use of manuals system diagramsplans and drawings types characteristics and capabilities of electrical apparatus use characteristics and capabilities of specialised tools and testing equipment and network interconnectors source of possible backfeed

Role of the HV switching operator

Operational forms access authorities and permits associated with HV switching types of operational forms access authorities and permits and the purpose and procedure for operational forms access authorities and permits

Use and operation of equipment associated with HV overhead and substation equipment test instruments sticks interrupters and arc stranglers

Types and categories of HV switchgear

Application function and operating capabilities of switchgear

Restrictions pertaining to HV switching equipment

Procedures for the isolation of HV transmission main and working earths

Earthing HV electrical apparatus practices and procedures for access purposes of Operational and additional work part onsite earths factors determining the location and effectiveness of Operational earthing acceptable industry procedures and personal protective equipment

High voltage switching techniques

Operate switching apparatus identifying hazards assessing and controlling risks associated with HV switchgear operation systematic and defensive techniques mobile radio procedures and double isolation procedures

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 Date 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 underground mains distribution extension encompassing

Commonwealth StateTerritory and local government legislation Standards codes supply authority regulations and or enterprise requirements applicable to underground mains distribution extension

Requirements for the use of underground mains 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

Determining the appropriate excavation for the location

Determining the size and depth of excavation

Determining the trench and pit layout procedures

Minimum clearances between conductors

Estimation of the duration of underground distribution extension project

T Effects of harmonics to an extent indicated by the following aspects

Characteristics and effects of harmonics on protection device functionsmalfunction

Effects of harmonics on the following transformers generators motors and quality of supply

T HV system load calculation principles encompassing

Structure of HV systems

Ratings of HV system components

Relationship to HV customers

Methods of determining load on HV systems

Records of load on HV systems

Effect of added load on HV feeders variation of current voltage power reactive power and power factor

Load flows in parallel or loop operation

Enterprise specific network coordination tools

T EHV system load calculation principles encompassing

Structure of EHV transmission systems

Ratings of EHV system components

Relationship to EHV customers

Relationship to generation sources

Methods of determining load on EHV systems

Records of load on EHV systems

Effect of added load on EHV transmission systems variation of current voltage power reactive power and power factor

Load flows in parallel or loop operation

Enterprise specific network coordination tools

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 UET 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 compliant technical designs of an underground transmission network with at least one relating to each of the following project types

Alteration to existing assets

Underground supplies between substations possibly including overhead to underground connections

B

Designs should also include all the following

Activities that address the correction of errors in the process

Application of a design control checklist which lists all of the required design activities to be carried out in this process

C

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 underground transmission systems

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 underground transmission systems and may include the following items or equipment:

Manufacture’s data sheets, documents, drawings

Manufacturers’ recommendations; Reliability performance profiles; Knowledge of local history and experience; Consultation with other Authorities; Environmental influences; Present practices.

Equipment includes; Sectionalisers, air break switches, capacitor banks, transformer taps, metering and protection equipment, data communication systems

Primary and secondary voltage and current injection equipment; time delay measuring equipment; Current transformers; Voltage transformers; Power transformers; Tapchangers; Circuit breakers; Capacitor banks; Ring main units; Audio frequency load control; Circuit breaker auxiliary systems; Substation and metal structure earthing systems; SCADA interfaces and transducer inputs; local opto-isolated alarms: PLC programs; Auto Reclosers (ACRs); protection relays; metering; control circuits; Statistical metering systems; Frame leakage relays; Distance relays; Pilot wire relays; Transformer differential relays; Busbar differential relays; Impedance bus zone relays; Overcurrent and earth fault relays; Transformer neutral check relays; Circuit breaker fail relays; Multi-trip relays; Auto recloser relays; Voltage transformer failure relays; Surge protection relays; Buchholz relays; Winding temperature relays; Sensitive earth fault relays; Phase failure relays; Frequency relays; Load shedding relays; General protection LV devices; Oil temperature protection devices; Oil surge protection devices; Power supplies. differential relays; power systems; multi-facetted schemes; interactive overload schemes, distance protection (incorporating relay selection, switched/non-switched schemes; mutual coupling and teed feeder systems); protection signalling (incorporating series, direct, permissive, distance acceleration, block interruption); telecommunication circuits and equipment.

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