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 an AC or DC drive unit 
SAQA US ID UNIT STANDARD TITLE
10282  Maintain an AC or DC drive unit 
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  12 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2002-06-12  2005-06-12  SAQA 0742/02 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2006-06-12   2009-06-12  

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 does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard is for persons who work in the DC System sector of the engineering industry.

A person credited with this unit standard will be able to:
Plan and prepare to maintain, inspect and clean, repair, replace and rectify defects, recommission and complete work on an AC or DC drive unit.

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:
  • Permit system
  • Environmental awareness
  • Power electronic principles and experience
  • Knowledge of printed circuit boards
  • Knowledge of electronic components 
    		•

    UNIT STANDARD RANGE 
    Statutory Requirements Definition: Statutory requirements includes but is not limited to OHS Act, SABS Regulations, Mineral Act, Local Authority requirements, Manufacturers specification and Worksite procedures. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Plan and prepare to maintain an AC or DC drive unit. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Authorisation is obtained according to the plant permit system. 

    ASSESSMENT CRITERION 2 
    2. Documentation is obtained to carry out work. Manuals, drawings and work orders. 

    ASSESSMENT CRITERION 3 
    3. All materials required for maintenance are selected and obtained according to worksite procedure. Blower, extension, feather duster, rags and paintbrush. 

    ASSESSMENT CRITERION 4 
    4. Test equipment is selected, checked for functionality and collected according to worksite procedure. Multimeter, oscilloscope, clip-on ammeter, recorders and test leads. 

    ASSESSMENT CRITERION 5 
    5. All spares and tools required for the task are selected and collected according to manufacturer's specifications. 

    SPECIFIC OUTCOME 2 
    Inspect and clean an AC or DC drive unit. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Printed circuit boards are inspected for cleanliness, faulty components and functionality and defects are recorded. 

    ASSESSMENT CRITERION 2 
    2. Transformers, chokes and capacitors are inspected for defects and defects are recorded. 

    ASSESSMENT CRITERION 3 
    3. Drive conductors and terminations are inspected for hot and loose connections, discoloured connections and defects are recorded. 

    ASSESSMENT CRITERION 4 
    4. Cubicles are inspected to be clean, dust free and in a mechanical sound condition, and defects are recorded. 

    ASSESSMENT CRITERION 5 
    5. Drive is inspected for sustainable alarm conditions and defects are recorded. 

    ASSESSMENT CRITERION 6 
    6. Personal protective equipment is used throughout inspecting, cleaning and repairs. 

    ASSESSMENT CRITERION 7 
    7. Cubicle is cleaned according to worksite procedures. 

    ASSESSMENT CRITERION 8 
    8. Instruments and isolators are inspected and defects are recorded. 

    ASSESSMENT CRITERION 9 
    9. Semiconductors and heatsinks are inspected, cleaned and defects are recorded. 

    SPECIFIC OUTCOME 3 
    Repair, replace and rectify defects on an AC or DC drive. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. All faulty components are identified by using fault finding techniques. 

    ASSESSMENT CRITERION 2 
    2. Identified faulty components are removed and replaced with correct specification components in line with manufacturer's and safety standards. 

    ASSESSMENT CRITERION 3 
    3. Modules are calibrated according to manufacturer's specifications. 

    ASSESSMENT CRITERION 4 
    4. Drive is tested for correct operation using manufacturer's specifications or worksite procedures, and abnormalities are reported to designated personnel. 

    ASSESSMENT CRITERION 5 
    5. Faulty settings are rectified using worksite procedures. 

    ASSESSMENT CRITERION 6 
    6. Knowledge of components, printed circuit board handling, fault finding techniques, operation and work safety are demonstrated. 

    SPECIFIC OUTCOME 4 
    Recommission and complete work on an AC or DC drive unit 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Drive unit is inspected to be according to drawings. 

    ASSESSMENT CRITERION 2 
    2. All settings and alarms are verified according to manufacturer's specifications. 

    ASSESSMENT CRITERION 3 
    3. Drive operation and functionality are tested for correct operation using manufacturer's specifications. 

    ASSESSMENT CRITERION 4 
    4. Documentation is completed. 

    ASSESSMENT CRITERION 5 
    5. Abnormalities and defects are reported as per worksite procedures. 

    ASSESSMENT CRITERION 6 
    6. Knowledge of installations, drawings, power electronic principles and safety are demonstrated. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • 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 
  • Knowledge of drive systems
  • Knowledge of static sensitive devices such as CMOS (Complementary Metal-oxide Semiconductor)
  • Knowledge of reticulation system 
    		•


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems in testing, fault finding, repairing and rectifying faults. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others in reporting test results to superior. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself in planning the work and determining a sequence of operation. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information obtained during testing, fault finding, repairing and rectifying faults. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate with superior readings obtained, the interpretation and reporting of test results. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  20420   National Certificate: Electrical Engineering  Level 4  NQF Level 04  Passed the End Date -
    Status was "Registered"     		 2004-02-10  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.