Elements and Performance Criteria

RANGE STATEMENT
10) This relates to the competency standard 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 Competency Standard Unit shall be demonstrated in relation to the installation of high current DC switchgear and equipment
DC switchgear and other equipment include but are not limited to direct current circuit breakers, rectifier transformers, rectifiers, invertors, isolators and links, harmonic filters, negative reactors, energy dissipating resistors (EDR’s) and rail earth contactor.
Associated equipment may include DC feeders, surge arresters, isolating links, busbar, cables, cable supports, pits and enclosures, control wiring of protection/alarm systems, metering, supervisory interface and cabinets.
Test and measurement equipments may include multimeters, low resistance high current, megger tester, ammeter, voltmeter, 1500 V dropout test sets.
Drawings can refer to wiring, schematic, operating and substation arrangement diagrams, cable block and schedule diagrams and building layouts.
Confined Spaces may apply to pits, cable tunnels, false floors, and cable basements.
Protection systems may include Buchholz, frame leakage, overcurrent, earth leakage, reverse current, Delta I and diode protection.
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

EVIDENCE GUIDE
9) This provides essential advice for assessment of the competency standard unit and must be read in conjunction with the Performance Criteria and the Range Statement of the competency standard unit 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
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 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 substance/material 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
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 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 learner’s 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 tools/equipment/materials/procedures/workplaces/other variables


Group No
The minimum number of items on which skill is to be demonstrated
Item List


A
All of the following:
Multimeters
Low resistance high current
Megger tester
Ammeter
Voltmeter
1500 V drop out tester
Wiring diagrams
Schematic drawings
Operating and substation arrangement diagrams
Building layouts
Cable block and schedule diagrams


B
At least six of the following:
Direct current circuit breakers
Rectifier transformers
Rectifiers
Isolators and links
Harmonic filters
Negative reactors
Energy dissipation resistors


C
At least ten of the following:
DC feeders
Surge arresters
Isolating links
Busbar
Cables
Cable supports
Pits and enclosures
Protection/alarm systems
Control wiring
Metering
Supervisory interface
Cabinets
REC


D
At least three of the following:
Buchholz
Frame leakage
Overcurrent
Earth leakage
Reverse current
Delta i
Diode protection


E
All of the following:
Cable terminations
Busbar termination/joint
Alignment of electrical contacts of withdrawable equipment


F
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
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 installation of high current DC switchgear and equipment.
In addition to the resources listed above, in Context of and specific resources for assessment, evidence should show demonstrated competency working:
Below ground, in limited spaces, with different structural/construction types and method and in a variety of environments.

Method of assessment
9.4)

This Competency Standard 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 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 learning/assessment 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
9.5)

There are no concurrent assessment recommendations for this unit.