This unit involves the skills and knowledge required to overhaul and repair switchgear and control gear rated in excess of 20 kiloamps (kA).

It includes planning and documenting the scope of service work required, arranging for the overhaul and repair to be carried out, verifying compliance of overhauled/repaired switchgear/control gear and completing the necessary service documentation.

The skills and knowledge described in this unit require a licence or permit to practice in the workplace where work is carried out on electrical installations which are designed to operate at voltages greater than 50 volt (V) alternating current (a.c.) or 120 V direct current (d.c.).

Competency development activities in this unit are subject to regulations directly related to licensing. Where a licence or permit to practice is not held, a relevant contract of training, such as an Australian Apprenticeship, may be required.

Additional and/or other conditions may apply in some jurisdictions subject to regulations related to electrical work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for overhaul/repair of switchgear/control gear

1.1

WHS/OHS processes and workplace procedures for a given work area are identified and applied

1.2

Existing WHS/OHS risk control measures and workplace procedures in preparation for work are followed

1.3

Safety hazards that have not previously been identified are noted on job safety assessments, risks assessed and risk control measures implemented

1.4

Workplace instructions on the scope of overhaul and/or repair work are received and expected outcomes of work discussed with appropriate person/s

1.5

Appropriate person/s is consulted to ensure the work is coordinated effectively with others involved on the worksite

1.6

Switchgear/control gear service and repair documentation is read and applied

1.7

Sources of materials required for work are determined in accordance with workplace procedures

1.8

Tools, equipment and testing devices needed for work are obtained in accordance with workplace procedures and checked for correct operation and safety

2

Overhaul switchgear/control gear

2.1

WHS/OHS risk control measures and workplace procedures for carrying out repair work are followed

2.2

Need to inspect, test or measure live electrical work is determined in accordance with WHS/OHS requirements and workplace procedures

2.3

Circuits/machines/plant are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

2.4

Switchgear and control gear are dismantled, parts tagged and stored to prevent loss or damage

2.5

Serviceability of switchgear/control gear components is determined by measurement tests and inspections and results recorded in accordance with workplace procedures

2.6

Materials/replacement parts required to complete repair work are sourced and obtained in accordance with workplace procedures

2.7

Repairs are inspected and tested in accordance with workplace procedures

2.8

Overhaul/repair specifications and work instructions are documented in accordance with workplace procedures

3

Document overhaul/repair work

3.1

WHS/OHS work completion risk control measures and workplace procedures are followed

3.2

Reusable, faulty or worn components are tagged and despatched for repair in accordance with workplace procedures

3.3

Repair work is documented in accordance with workplace requirements, stating whether the switchgear/control gear complies with the overhaul specifications and relevant industry standards

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices, including using of risk control measures

applying sustainable energy principles and practices

documenting overhaul/repair work

overhauling and repairing major switchgear/control gear, including:

completing service documentation correctly

dealing with unplanned events in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

determining the state/serviceability of switchgear/control gear correctly

interpreting service and repair documentation correctly

repairing switchgear/control gear in accordance with relevant industry standards

preparing for overhaul/repair of switchgear/control gear.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

types and applications of switchgear and control gear

operating principles of switchgear and control gear

interlocking systems, including:

external interlocking systems such as Castell key systems

internal interlocking systems for either safety or that operate in conjunction with Castell key systems

control and protection of switchgear and control gear

installation requirements, including:

operating specifications for equipment

areas requiring repairs and maintenance

determining if repairs/maintenance are to be carried in situ or in workshop environment

relevant legislation and standards applicable to the installation

WHS/OHS issues with regard to removing/re-installing heavy equipment

electrical safety issues with regard to removing/re-installing equipment

understanding of CFC units

electrical switchgear and control gear protection methods, including:

the operation of switchgear when it opens under load

the settings and operation required for both magnetic short circuit and thermal overload with equipment

determining the earth fault-loop impedance requirements required to keep touch voltage values within requirements

thermal imaging techniques

time/current curves from manufacturer specifications

equipment to safely test switchgear after repairs or maintenance

effectiveness of arc suppression installed within the equipment

modern types of switchgear that are computer controlled and programmed

modern types of switchgear that are interconnected to other protective devices

certification process for any repair or maintenance work performed

phase-failure systems

verifying the correct fault-level for the installation is consistent with the kiloamp (kA) rating of the equipment

x-ray and ultrasonic detection systems with regard to metallurgy

different types of lubricants required for different locations, temperatures and humidity

electrical safe working practices of working safely on or around electrical equipment, including:

determining safe working standards and codes of practice for equipment and installations over 20 kA

WHS/OHS requirements for equipment and installations over 20 kA

working knowledge of operating within the vicinity of live conductors, such as barriers

procedures for working on switchgear over 20 kA

risks and control measures associated with harmful dusts and airborne contaminants, including thermal insulation, fibrous cement materials and asbestos, and other fibre-reinforced switchboard materials

checks and storage methods for maintaining the safety of testing devices.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in suitable simulated workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or other simulations

relevant and appropriate materials, tools, facilities, equipment and personal protective equipment (PPE) currently used in industry

resources used reflect current industry practices in relation to overhauling and repairing major switchgear and control gear

applicable documentation, including workplace procedures, equipment specifications, regulations, relevant industry standards, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

overhauling and repair majoring switchgear and control gear must include at least two types of the following switchgear and control gear:

low voltage (LV) switchgear and control gear rated above 20 kA

any high voltage (HV) switchgear and control gear

Electrotechnology

Electrical