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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Construct DC power supplies 
SAQA US ID UNIT STANDARD TITLE
259169  Construct DC power supplies 
ORIGINATOR
SGB Electronics 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 10 - Physical, Mathematical, Computer and Life Sciences Information Technology and Computer Sciences 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  5 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

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 intended for persons working in the electronic environment. Learners will be to describe and use a basic DC power supply, perform fault finding and build a DC power supply.

Learners credited with this Unit Standard are capable of:
  • Describing and using basic DC power supplies.
  • Building DC power supply.
  • Performing fault finding.
  • Measuring regulation and ripple of the power supply. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that learners are competent in:
  • Communication skills at NQF Level 3.
  • Mathematics at NQF Level 3.
  • Knowledge of AC theory. 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe and use basic DC power supplies. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    A basic power supply circuit is described by means of a circuit diagram. 

    ASSESSMENT CRITERION 2 
    Various stages of power supply are identified and explained by means of wave forms and voltages. 

    SPECIFIC OUTCOME 2 
    Build DC power supply. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    An understanding of the safety features that needs to be build in a power supply is demonstrated through the use of fuses, switches and protected output. 

    ASSESSMENT CRITERION 2 
    Components ratings are identified and selected in order to prevent malfunctioning. 

    SPECIFIC OUTCOME 3 
    Perform fault finding. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Logical procedures are demonstrated in isolating faulty components. 

    ASSESSMENT CRITERION 2 
    The reasons for the fault are identified and describe in order to take corrective action. 

    SPECIFIC OUTCOME 4 
    Measure regulation and ripple of the power supply. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Conditions of measurement are applied during the testing. 

    ASSESSMENT CRITERION 2 
    Calculations of regulation and the ripple factor are performed using the standard method. 

    ASSESSMENT CRITERION 3 
    Measurements of regulation and ripple factors are compared to theoretical calculations for consistency. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant ETQA according to the ETQA`s policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments at exit points of the qualification, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described both in individual unit standard as well as the integrated competence described in the qualification. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Learners should have a knowledge and understanding of:
  • OHM's Law.
  • Safe working practices.
  • Test instruments.
  • Calculations. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems relating to potentially hazardeous voltages and current that could be life threatening by adhering to safe practices and precautions. 

    UNIT STANDARD CCFO ORGANISING 
    Plan, organise and manage oneself and one's activities responsibly and effectively by acquiring appropriate testing instruments and electronic components needed for testing. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information relating to measurements recorded in order to determine the corrective measures to be taken, if necessary. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation by providing reports of findings. 

    UNIT STANDARD CCFO SCIENCE 
    Using science and technology effectively and critically, showing responsibility towards the environment and others by identifying appropriate instruments that can used for measurements and safe working practices thereby adhering to health and safety regulations. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation in relation to the interrelatedness of electronic systems. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  80306   Further Education and Training Certificate: Electronics  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 


    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.
     
    1. Africa Learn (Pty) Ltd 
    2. Epitome Villa (Pty)Ltd 


    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.