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Elements and Performance Criteria

  1. Plan for the maintenance of network protection and control systems (complex)
  2. Carry out the maintenance of network protection and control systems (complex)
  3. Complete the maintenance of network protection and control systems (complex)

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 maintaining network protection and control systems complex

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

KSTTSA Complex network protection and control systems

KS01-TTS35A Complex network protection and control systems

Evidence shall show an understanding of complex network protection and control systems to an extent indicated by the following aspects

T Principles of power transformer construction and operations encompassing

Applications of static reactive plant in high voltage networks including voltage control VAR control transient response capacity

Types of static reactive plant including high voltage capacitors high voltage reactors static VAR compensators and combinations of these

Operating characteristics and operational constraints including point on wave switching issues

Ratings cooling systems and control systems and ancillary equipment used

Configurations and system layout including single star double star bridge type

Typical protection systems used including neutral unbalance current neutral unbalance voltage

Techniques used when balancing elements within static reactive plant

Safety precautions when testing and maintaining high voltage static reactive plant safe working practices and procedures identification of hazards assessment and control of OHS risks types selection maintenance and use of personal protective equipment

T Detailed operation of complex protection systems encompassing

Distance characteristics electromechanical electronic impedance mho offset mho switched schemes nonswitched schemes blocking schemes bus zone

Differential transformer differential bus overcurrent principles feeder protection transformer protection bias systems harmonic restraint CT connections bus protection low impedance schemes high impedance schemes bus overcurrent schemes generator protection CT connections special considerations digital systems

Types of revenue metering

Applications of SCADA

Complex protection systems for communications

Harmonic control

Point on wave switching

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 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

Do all of the following

Note Utilise different schemes from within the complex schemes in the Range Statement of this unit

Isolate protection control and alarms associated with complex protection and control schemes

Calibrate complex protection and control relays

Carry out function tests Trips alarms etc on complex protection and control schemes

Write reports on performance of complex protection and control schemes

Isolate in service Current Transformers

B

Do all of the following

Activities that address the correction of errors in network protection and control systems

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 maintenance of network protection and control systems complex

In addition to the resources listed above in Context of and specific resources for assessment evidence should show demonstrated competency working in 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 Transmission Distribution and Rail Traction Industry 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 concurrent assessment recommendations for this unit


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 maintenance of network protection and control systems (complex) and may include the following:

Discrete: Overcurrent, earth fault, frame leakage, cooling, buchholz, DC supplies, restricted earth, sensitive earth fault, reclose, DC frame leakage, CEL fail under frequency load shed.

Interdependent :Instrument transformers, trip/control circuits, alarms, DC supplies, CB fail protection, master controlled earth fault, intertripping, blocking, synchronising, pilot wire, phase comparison, load shedding, voltage control, parallel operation, load rejection, circuit isolations and restorations, mechanical adjustments, calibration, function tests, reporting, signals, thermals, contraphase, backup, reverse current

Complex: distance, differential, transformer differential, bus zone, bus overcurrent, revenue metering, SCADA, communications, harmonic control, point on wave.

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

Testing procedures

Work clearance systems