Modification History
Not applicable.
Unit Descriptor
Unit Descriptor |
1) Scope: |
1.1) Descriptor |
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This unit covers disconnecting and reconnecting flame proof, increased safety and intrinsic safety electrical equipment to supply up to 1,000V a.c. or 1,500V d.c. under restrictions of designated electrical equipment and conditions specified. It encompasses working safely in hazardous area, identifying supply arrangements, following isolation procedures, handling explosion-protection equipment, selecting and using testing and measuring devices, terminating and connecting cables and conductors, safety testing and reporting. This unit is directly equivalent to the Unit 2.27 Disconnect and reconnect explosion-protected equipment connected to low voltage supply in the Australian/New Zealand Standard AS/NZS 4761.1 Competencies for working with electrical equipment for hazardous areas (EEHA) Part 1: Competency Standards. Equivalence includes endorsement in the explosion-protection techniques listed in the Range statement of this unit. |
Application of the Unit
Application of the Unit |
2) |
This unit applies to any formal recognition for this standard at the aligned AQF 3 level or higher. |
Licensing/Regulatory Information
License to practice |
3) |
The skills and knowledge described in this unit requires a license to practice in the workplace where plant and equipment operate at voltage above 50 V a.c. or 120 V d.c. However 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 regulations directly related to occupational health and safety and where applicable contracts of training such as apprenticeships. Note: Candidates are to meet regulator eligibility requirements by providing formal confirmation from the relevant state/territory regulator for the respective work class and scope of work prior to developing and being conferred competent. |
Pre-Requisites
Prerequisite Unit(s) |
4) |
Competencies |
4.1) |
Granting competency in this unit shall be made only after competency in the following unit(s) has/have been confirmed. UEENEEE101A Apply Occupational Health and Safety regulations, codes and practices in the workplace; and UEENEEP012A Disconnect / reconnect composite appliances connected to low voltage installation wiring; or UEENEEP013A Disconnect /reconnect electrical equipment connected to low voltage installation wiring Competencies needed for emergency services and equipment repair. |
Literacy and numeracy skills |
4.2) |
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Participants are best equipped to achieve this unit if they have reading, writing and numeracy skills indicated by the following scales. Description of each scale is given in Volume 2, Part 3 ‘Literacy and Numeracy’ |
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Reading |
3 |
Writing |
3 |
Numeracy |
3 |
Employability Skills Information
Employability Skills |
5) |
This unit contains Employability Skills The required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements. |
Elements and Performance Criteria Pre-Content
6) Elements describe the essential outcomes of a competency standard unit |
Performance Criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the Evidence Guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
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1 |
Prepare to disconnect electrical equipment |
1.1 |
Disconnection is planned to ensure OHS policies and procedures are followed. |
1.2 |
Appropriate persons are consulted to ensure work is coordinated effectively with others involved in the work site. |
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1.3 |
Safety hazards which have not previously been electrical characteristics of electrical equipment and electrical supply are determined and recorded in accordance with established procedures. |
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1.4 |
The point of isolation of electrical equipment to be disconnected is determined. |
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1.5 |
Tools, equipment and testing devices needed to carry out the work are obtained in accordance with established procedures and checked for correct operation and safety. |
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2 |
Disconnect electrical equipment |
2.1 |
OHS policies and procedures are followed. |
2.2 |
Electrical equipment is isolated in accordance with AS/NZS 4836 and established procedures (see Range Statement). |
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2.3 |
Conductor connection sequence is recorded and labelled in accordance with established procedures. |
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2.4 |
Visual checks of the electrical equipment and associated wiring are carried out in accordance with established procedures to detect any abnormal or obvious damage or fault. |
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2.5 |
Isolated equipment is confirmed as de-energised. |
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2.6 |
Electrical equipment is disconnected from fixed wiring without damage to other components. |
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2.7 |
Approval is obtained in accordance with established procedures from appropriate personnel, before any contingencies are implemented. |
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2.8 |
Disconnected conductors/cables are terminated in accordance with requirements to ensure they are safe and present no potential hazard. |
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3 |
Prepare to reconnect electrical equipment |
3.1 |
Reconnection is planned to ensure OHS policies and procedures are followed. |
3.2 |
Appropriate personnel are consulted to ensure work is coordinated effectively with others involved in the work site. |
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3.3 |
The point of isolation of the circuit to which the electrical equipment is to be connected is determined. |
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3.4 |
Replacement electrical equipment is selected on the basis of rating and characteristics being the same as that of the original electrical equipment. |
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3.5 |
Appropriate personnel are consulted in the event that replacement electrical equipment are not available. |
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3.6 |
Original and/or replacement electrical equipment is tested to ensure it is safe to connect to the electrical supply and use. |
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3.7 |
Tools, equipment and testing devices needed to carry out the work are obtained in accordance with established procedures and checked for correct operation and safety. |
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4 |
Reconnect electrical equipment |
4.1 |
OHS policies and procedures are followed. |
4.2 |
Measures are taken to ensure circuit to which electrical equipment is to be connected remains isolated and de-energised in accordance with AS/NZS 4836. |
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4.3 |
The continuity of the protective earthing conductor is tested to determine whether it is sufficiently low. |
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4.4 |
The resistance between the protective earthing conductor and the neutral conductor is tested to determine whether it is sufficiently low, i.e. not greater than 2 Ohms. |
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4.5 |
The insulation resistance of active conductors is tested to confirm that it is greater than 1 Megohm. |
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4.6 |
An appropriate qualified person is engaged to rectify any non-compliance condition revealed by the testing under item 4.3 to 4.5. |
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4.7 |
Continuity between exposed conductive parts of the appliance and the main earth or metal switchboard enclosure is confirmed. |
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4.8 |
Electrical equipment is connected to comply with requirements. |
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4.9 |
Connections to the electrical equipment are checked to confirm they are correct. |
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5 |
Test the reconnected electrical equipment for safe operation |
5.1 |
OHS policies and procedures, and established procedures for the reinstatement of isolated circuits and electrical equipment are followed. |
5.2 |
Arrangements are made with appropriate personnel to test the operation of the electrical equipment in accordance with established procedures. |
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5.3 |
Operational non-conformances are identified and reported in accordance with established procedures. |
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6 |
Identify and report faults |
6.1 |
Electrical equipment is isolated in accordance with established procedures. |
6.2 |
Other OHS policies and procedures are followed. |
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6.3 |
Visual checks of the electrical equipment to be disconnected and/or reconnected are carried out in accordance with established procedures to detect any abnormal or obvious damage or fault. |
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6.4 |
Fault(s) at point of disconnection and/or reconnection are identified and reported in accordance with established procedures. |
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6.5 |
Approval is obtained in accordance with established procedures from appropriate personnel, before any contingencies are implemented. |
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7 |
Provide status report(s) |
7.1 |
Status report(s) are completed and notified in accordance with established procedures. |
Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and disconnecting and reconnecting fixed wired explosion-protected electrical equipment connected to a Low Voltage supply. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EP021A Disconnect and Reconnect Explosion- Protected Electrical Equipment Evidence shall show an understanding of working safely in hazardous areas to an extent indicated by the following aspects: T1 Hazardous area safe working practices encompassing:
T2 Hazardous area and explosion protection principles encompassing:
T3 Explosion-protected techniques — Principles encompassing:
T4 Flameproof (Ex ‘d’) explosion-protection technique encompassing:
T5 Increased safety (Ex ‘e’) explosion-protection technique encompassing:
T6 Intrinsic safety (Ex ‘i’) explosion-protection technique encompassing:
T7 Common characteristics of explosion-protection techniques encompassing:
T8 Hazardous areas cable termination devices and applications encompassing:
T9 Hazardous areas cable termination techniques encompassing:
T10 Enterprise reporting and recording system encompassing:
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Evidence Guide
EVIDENCE GUIDE |
9) The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package. The Evidence Guide forms an integral part of this Unit and shall be used in conjunction with all components 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-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. In some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accordance with industry and regulatory policy. 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 issues inherent in working with electricity, electrical equipment, gas or any other hazardous substance/material present a challenge for those determining competence. Sources of evidence need to be ‘rich’ in nature to minimise error in judgment. Activities associated with normal everyday work influence decisions about how/how much 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 practised. 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 – UEE11’. Evidence shall also comprise:
Note: Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed. In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified. |
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:
These should be part of the formal learning/assessment environment. Note: Where simulation is considered a suitable strategy for assessment, conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy. The resources used for assessment should reflect current industry practices in relation to disconnecting and reconnecting fixed wired explosion-protected electrical equipment connected to a Low Voltage supply. |
Method of assessment |
9.4) |
This 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 Industry to which this unit applies. This requires assessment in a structured environment which is intended primarily for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit. |
Concurrent assessment and relationship with other units |
9.5) |
There are no concurrent assessment recommendations for this unit |
Range Statement
RANGE STATEMENT |
10) This relates to the 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 unit shall be demonstrated in relation to a gas hazardous area and disconnecting and reconnecting equipment connected to supplies up to 1,000V a.c or 1,500V d.c which incorporating the following explosion-protection techniques:
Note: Limitations of this unit. This unit does not cover installations
Safe Working. Safe procedures for working within in the scope of this unit shall be in accordance with AS/NZS 4836 ‘Safe working on low-voltage electrical installations.’ Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1. |
Unit Sector(s)
Not applicable.
Competency Field
Competency Field |
11) |
Restricted and Specialisations |