SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Maintain unit protection devices on transformers 
SAQA US ID UNIT STANDARD TITLE
113895  Maintain unit protection devices on transformers 
ORIGINATOR
SGB Electrical Engineering & Construction 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 12 - Physical Planning and Construction Electrical Infrastructure Construction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 4  NQF Level 04  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2007-04-03  2009-02-18  SAQA 0160/05 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2010-02-18   2013-02-18  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard is replaced by: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
259192  Maintain unit protection devices on transformers  Level 4  NQF Level 04  6   

PURPOSE OF THE UNIT STANDARD 
This unit standard is for persons in the Electrical Engineering; Generation; Distribution; Transmission, Construction and Renewable Energy Sector.

A person credited with this unit standard will be capable of:
  • Planning, preparing, maintaining and completing post maintenance work on transformer unit protection devices.

    This unit standard will contribute to the full development of the learner within the electrical engineering and construction environment by providing recognition, further mobility and transportability within the field of Physical Planning and Construction. The skills, knowledge and understanding demonstrated within this unit standard are essential for social and economic transformation and upliftment within the electrical engineering and construction environment. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The following knowledge, skills attitude and / or equivalent:
  • Safety procedures
  • Use and knowledge of electrical test equipment
  • Basic safety procedures relating to tools and solvents
  • Electrical drawings
  • General fault finding principles
  • Names and functions of transformer components
  • HV electrical induction awareness 
    		•

    UNIT STANDARD RANGE 
    Unit protection devices may include, but is not limited to:
  • Oil level switches
  • Bucholtz alarm and trip switches
  • Oil and winding temperature alarm and trip switches / settings, instruments and probes
  • Pressure relief valve switches
  • Cooling pumps, fans and controls 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Plan to maintain transformer unit protection devices. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Planning is done in conjunction with outage scheduling and or maintenance programmes. 

    ASSESSMENT CRITERION 2 
    2. Planning is integrated with other disciplines and associated equipment. 
    ASSESSMENT CRITERION RANGE 
    Protection testing, engineering operating and control centres. Switchgear, CT, surge arrestors and auxiliary equipment.
     

    ASSESSMENT CRITERION 3 
    3. Planning is arranged according to equipment history reports and failure rate. 

    ASSESSMENT CRITERION 4 
    4. Planning is arranged according to plant availability and customer requirements and network stability. 

    ASSESSMENT CRITERION 5 
    5. Temporary electric supply from alternative sources is considered and identified and made available for use of equipment during maintenance where appropriate. 

    SPECIFIC OUTCOME 2 
    Prepare to maintain transformers unit protection devices. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Transformer is effectively isolated and made safe to work on in accordance with statutory requirements. 

    ASSESSMENT CRITERION 2 
    2. Transformer is identified and required tools, equipment and personal protective equipment are selected and obtained prior to maintenance according to job requirements. 

    ASSESSMENT CRITERION 3 
    3. Test equipment is selected, inspected and checked for functionality and safety prior to maintenance tasks. 

    ASSESSMENT CRITERION 4 
    4. Maintenance task instructions are interpreted and sequence of operations is determined and communicated to work team members. 

    ASSESSMENT CRITERION 5 
    5. Appropriate drawings and documentation is obtained and made available prior to commencing maintenance task. 
    ASSESSMENT CRITERION RANGE 
    Manufacturers specifications, maintenance and testing procedures.
     

    ASSESSMENT CRITERION 6 
    6. Cleaning materials and equipment are identified and selected to meet job requirements. 

    ASSESSMENT CRITERION 7 
    7. Work area is checked for hazards and corrective action is taken. 

    SPECIFIC OUTCOME 3 
    Maintain transformer unit protection devices. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Environmental requirements pertaining to hazards during maintenance are identified and appropriate corrective action is taken in accordance with applicable requirements. 
    ASSESSMENT CRITERION RANGE 
    Possible presence of Polychlorinated Bivynals in the insulating oil.
     

    ASSESSMENT CRITERION 2 
    2. Mechanisms are maintained according to manufacturer`s maintenance manuals and site specific standards. 

    ASSESSMENT CRITERION 3 
    3. Transformer unit protection devices are inspected using diagnostic techniques to determine faults, defective equipment and components and corrective maintenance is carried out according to maintenance procedure and site specific standarts. 

    ASSESSMENT CRITERION 4 
    4. Tests are carried out on insulating medium to determine internal faults and corrective action is taken in line with site requirements. 

    ASSESSMENT CRITERION 5 
    5. Insulating medium`s dielectric strength tests comply to manufacturers specifications and site specific standards. 
    ASSESSMENT CRITERION RANGE 
    Specific standard dielectric test report.
     

    ASSESSMENT CRITERION 6 
    6. Transformer and auxiliary equipment / components are effectively cleaned using correct site approved cleaning material and methods. 

    ASSESSMENT CRITERION 7 
    7. Personal protective equipment is used and site specific safety standards are adhered to throughout maintenance. 

    SPECIFIC OUTCOME 4 
    Complete work task. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Re-commissioning quality checks and tests are conducted after maintenance and necessary adjustments are carried out to meet manufacturer`s and work site standards. 

    ASSESSMENT CRITERION 2 
    2. All reports and documentation are completed and submitted to the designated personnel. 
    ASSESSMENT CRITERION RANGE 
    Test reports and function test results.
     

    ASSESSMENT CRITERION 3 
    3. Transformer is restored to serviceable condition in line with manufacturer`s specifications and applicable requirements. 

    ASSESSMENT CRITERION 4 
    4. Work task cleaning process is completed according to industry safety standards, environmental requirements and site standards. 

    ASSESSMENT CRITERION 5 
    5. Tools and test equipment is cleaned and returned for safe keeping according to site specific requirements. 

    ASSESSMENT CRITERION 6 
    6. Disposal of defective equipment and components and waste materials is carried out in accordance with environmental and work site standards. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    1. Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.

    2. Any provider offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA.

    3. Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines in the relevant qualification and the agreed ETQA procedures. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Terminology associated with testing equipment and materials
  • Relevant section of Occupational Health and Safety Act
  • Relevant section of statutory requirements
  • Dismantling and installation procedures
  • Operating principles of testing equipment
  • Relevant sections of statutory requirements
  • General testing principles
  • Working principles of applicable equipment and components 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team or group. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively by means of language skills, oral and/or written. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 259191, which is "Maintain unit protection devices on transformers", Level 4, 6 credits. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  48474   National Certificate: Electrical Engineering  Level 4  Level TBA: Pre-2009 was L4  Passed the End Date -
    Status was "Reregistered"     		 2009-02-18  Was EWSETA until Last Date for Achievement 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.