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 Direct Current (DC) machines 
SAQA US ID UNIT STANDARD TITLE
13682  Maintain Direct Current (DC) machines 
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  5 
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
259201  Maintain Direct Current machines and control gear  Level 4  NQF Level 04  5   

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

A person credited with this unit standard will be able to:
  • Plan the maintenance task
  • Prepare the work area
  • Repair DC machines
  • Completed the activity

    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:
  • Introduction to industry and operational area
  • Apply and adhere to electrical safety
  • Installation of DC machines
  • Identify, interpret and lay out of drawings
  • Use and care for hand tools
  • Use and care for portable power tools
  • Record instrument readings
  • Select, use and care for electrical measuring instruments
  • Install electrical cables and conductors
  • Interpret DC circuit diagrams
  • Joint and fault tract cables 
    		•

    UNIT STANDARD RANGE 
    Repairs may include but are not limited to:
  • Routine maintenance
  • Planed maintenance
  • On the job fault finding
  • Servicing 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Plan the maintenance task 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Job instructions are obtained and communicated with the team leader according to work site procedures. 

    ASSESSMENT CRITERION 2 
    2. Appropriate documentation is acquired according to work site procedures. 

    ASSESSMENT CRITERION 3 
    3. Appropriate personal protective equipment, tools, DC machine components, materials, work platforms and consumables are identified, selected and checked for defects according to statutory requirements and work site procedures. 

    ASSESSMENT CRITERION 4 
    4. DC machines to be maintained are identified according to work site procedure. 

    ASSESSMENT CRITERION 5 
    5. Appropriate special work platforms (if necessary) are obtained according to work site procedures. 

    ASSESSMENT CRITERION 6 
    6. Affected parties are informed and liased with according to work site procedures. 

    SPECIFIC OUTCOME 2 
    Prepare the work area 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Work area is inspected according to work site procedures and statutory requirements. 

    ASSESSMENT CRITERION 2 
    2. Hazardous and obstructive conditions are identified and corrective actions are taken according to work site procedures. 

    ASSESSMENT CRITERION 3 
    3. Appropriate personal protective equipment is selected and placed according to statutory requirements and work site procedures. 

    ASSESSMENT CRITERION 4 
    4. Appropriate tools, DC machine components, materials, work platforms and consumables are organised and delivered according to work site procedures. 

    SPECIFIC OUTCOME 3 
    Repair direct current (DC) machines 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The DC machine to be maintained is verified. 

    ASSESSMENT CRITERION 2 
    2. Personal protective equipment, tools, materials, work platforms, special work platforms (if necessary) and consumables are effectively used to carry out the task. 

    ASSESSMENT CRITERION 3 
    3. Repairs are performed on the DC machine(s) according to job instructions and work site procedures. 

    ASSESSMENT CRITERION 4 
    4. Safety, good housekeeping and correct environmental practices are followed before, during and after performance. 

    SPECIFIC OUTCOME 4 
    Complete the maintenance activity 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Documentation is completed and processed according to company procedures. 

    ASSESSMENT CRITERION 2 
    2. Personal protective equipment, tools, DC machine components, materials, work platforms, recyclable material and unused/half used consumables are stored according to work site procedures. 

    ASSESSMENT CRITERION 3 
    3. Scrap material is disposed off according to company standards and procedures. 

    ASSESSMENT CRITERION 4 
    4. Work area is restored to a clean and safe condition according to work site procedures. 

    ASSESSMENT CRITERION 5 
    5. Completion of job is communicated and recorded according to work site procedures. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Accreditation and moderation options:
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any provider offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA.
  • 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 that will help me understand and that I will be able to explain:
  • Occupational safety, health and environmental statuary requirements for activity
  • Applicable work site procedures
  • Applicable manufacturers` specifications
  • Job instructions
  • Documentation required for the activity
  • Communication and teamwork principles
  • Reporting systems
  • Ingress protection rating
  • Identification, location and function of appropriate tools, personal protective equipment and consumables
  • Effect of poisonous, toxic and dangerous materials on the human body
  • Names and functions of DC machines and DC machine components
  • Construction of DC machines
  • Working principles of DC machines and DC machine components are theoretically and practically explained as well as scientifically and mathematically proven
  • Uses of DC machines and DC machine component
  • Special electrical measuring instruments
  • Factors causing malfunctioning of DC machines
  • Routine maintenance
  • Planed maintenance
  • On the job faultfinding
  • Servicing of DC machines
  • Factors to consider while doing maintenance on DC machines (maintenance hints)
  • Specialist information
  • Company`s buying policy 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems (identification of defects). 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others (organise material schedules with team members). 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself (select and organise documentation and equipment). 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information (adhere to manufacturer specifications). 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate (reporting of defects). 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology (environmental and personal safety). 

    UNIT STANDARD CCFO CONTRIBUTING 
    Understand the world as a set of related systems communicate (know the consequences of incorrect using of products). 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 259201, which is "Maintain Direct Current machines and control gear", Level 4, 5 credits.

    This Unit Standard was originally registered on 14 August 2002 under SAQA decision number 0743/02. It has been re-registered on 11 February 2004 under SAQA 2552/04.


    Supplementary information:

    Specified requirements:

    Specified requirements include legal and legislative specific requirements and are contained in one or more of the following documents:
  • Mines and Minerals Act
  • Work site procedures
  • SABS specifications
  • Manufacturers manuals

    Applicable statutory requirements

    Glossary of terms:

    Advantages and disadvantages of DC machines and DC machine component may include but are not limited to:
  • Price
  • Availability
  • Expected life span
  • Delivered power

    Affected parties may include but are not limited to:
  • Production
  • Energy control section

    Buying policy may include but are not limited to:
  • Hand driven system
  • Computer driven system

    Cleaning may include but are not limited to:
  • Washing with safety solvent
  • Washing with cleaning agents
  • Wipe with a cloth
  • Using compressed air

    Communications and teamwork principles may include but are not limited to:
  • Questions and answers
  • Discussions
  • Depending on the help of somebody else to do a job

    Construction of DC machines may include but are not limited to:
  • Armature/commutator
  • Field coils
  • Brushes and brush gear
  • Frame

    Consumables may include but are not limited to:
  • Strapping
  • Cleaning agents
  • Stationary

    Corrective actions may include but are not limited to:
  • Repair
  • Initiate repairs
  • Report to responsible person

    Defects may include but are not limited to:
  • Cracks in frame
  • Broken off pieces
  • Broken fan
  • Bended shaft
  • Open or broken covers (Coupling, machine, terminal boxes)
  • Noisy bearings
  • Worn brushes
  • Commutator (Uneven surfaces, hot spots, mushroom segments)

    Dismantling may include but are not limited to removing of:
  • Fan
  • Fan cowling
  • Coupling
  • Covers (Coupling, machine, terminal boxes)
  • Brushes and brush gear
  • Supply cable

    Documentation may include but are not limited to:
  • Checklists
  • Job cards

    Environmental practices may include but are not limited to correct methods of disposing of material containing:
  • Grease
  • Safety solvent
  • Cleaning agents

    Factors to consider while doing maintenance on DC machines (maintenance hints) may include but are not limited to:
  • Use the correct voltage
  • Read the name plate (Type of machine, shunt-, series-, compound-)
  • Check and use correct type/size of brushes
  • Check brush pressure
  • Check commutator (Mica, mushroom segments)
  • Isolate before commencing any work on machinery
  • Washing machine with safety solvent
  • Use compressed air to clean machine
  • Do not clean commutator unnecessary (Protective platinum film)
  • Make sure that all covers are closed
  • Do not use silicon rubber to seal covers

    Fault diagnosis may include but are not limited to identifying:
  • Loose terminal connections
  • Damaged cable insulation
  • Cracks in frame
  • Broken off pieces
  • Broken fan
  • Loose covers
  • Bended shaft
  • Noisy bearings
  • Worn brushes
  • Sparks on brushes
  • Commutator (Uneven surfaces, hot spots, mushroom segments)

    Good housekeeping practices may include but are not limited to practices given by:
  • NOSA
  • Work site procedures

    Hazardous areas may include but are not limited to:
  • Petrol pumps
  • Spray painting booths
  • Areas for the storage and use of flammable fuels, paints or solvent
  • Flower mills
  • Coal cellars
  • Wine cellars

    Hazardous conditions may include but are not limited to:
  • Poor lighting
  • Exposed drive coupling of adjacent machine (If in operation)
  • Slippery surfaces

    Ingress protection rating may include but are not limited to:
  • Protection of persons against access to hazardous parts
  • Protection against water
  • Mechanical protection

    Job instruction may include but are not limited to instructions from:
  • Job cards
  • Team leader (Verbal instructions)

    Job instruction format may include but is not limited to:
  • Written or verbal form
  • Formal or informal methods

    Maintenance procedure may include but are not limited to:
  • Manufacturers` maintenance manuals
  • Company maintenance manuals

    Manufacturers` specifications may include but is not limited to:
  • Dimensions of components
  • Weight of components
  • Type of material from which components were manufactured as given in: manufacturers` maintenance manuals; manufacturer catalogues; company maintenance manuals

    Materials may include but are not limited to:
  • Bolts and nuts
  • Shim stock

    Measuring instruments (electrical) may include but are not limited to:
  • Multi meter
  • Voltage tester
  • Clamp meter
  • RCL meter
  • Oscilloscope
  • Recorder

    Obstructive conditions may include but are not limited to:
  • Equipment blocking the work area
  • Structures

    Obtained may include but are not limited to getting job done by somebody else by:
  • Reporting to team leader
  • Reporting to planner
  • Placing an order to another section

    On the job faultfinding may include but are not limited to:
  • Faultfinding on a single phase system
  • Faultfinding on a three-phase system

    Organised may include but are not limited to:
  • Placing of DC machine components, material, work platforms and consumables on strategic places for safe, quick and easy use
  • Positioning of DC machine components, material, work platforms and consumables in the sequence that it is going to be used

    Personnel protective equipment may include but are not limited to:
  • Safety glasses
  • Safety belts
  • Visors
  • Helmets
  • Safety shoes

    Personal safety may include but are not limited to:
  • Assuring safe conditions as given by NOSA
  • Acting safely as given by NOSA

    Planed maintenance may include but is not limited to:
  • Cleaning (Blow out machine with compressed air)
  • Inspecting of components (Armature, brushes and brush gear, commutator, frame, sparks on brushes)

    Poisonous, toxic and dangerous materials may include but are not limited to:
  • Grease
  • Safety solvent
  • Cleaning agents

    Policy procedure may include but are not limited to:
  • Methods of communicating
  • Methods of completing documentation
  • Methods of selecting personal safety equipment, tools, consumables, etc.
  • Checklists

    Practical safety may include but are not limited to:
  • Using of personnel protective equipment

    Processed may include but are not limited to:
  • Handed to team leader
  • Posted to planner
  • Filed

    Reassembling, adjusting and testing may include but are not limited to:
  • Reversal of dismantling
  • Testing machine according to SABS 0142 section 8

    Recyclable material may include but are not limited to:
  • Scrap paper
  • Boxes

    Reporting system may include but is not limited to:
  • Documentation (electronic of paper)
  • Verbal feedback

    Removing may include but is not limited to:
  • Disconnecting cable
  • Undoing of base bolts
  • Carry or transport machine to working facility

    Routine maintenance may include but is not limited to:
  • Check for excessive vibration
  • Check for sparks on the brushes
  • Abnormal noises from machine (Bearings)
  • Open covers

    Safety will include but are not limited to:
  • Personal safety
  • Practical safety
  • Safety on equipment

    Safety on equipment may include but are not limited to:
  • Heavy weight of machines
  • Slings
  • Eye bolts

    Scrap material may include but are not limited to:
  • Bolts
  • Nuts
  • Used sand paper

    Special electrical measuring instruments may include but are not limited to:
  • Growler
  • Tacho generator

    Specialist information may include but are not limited to:
  • Staggering of brushes

    Special work platforms may include but are not limited to:
  • Scaffolding
  • Telescoping scaffolding
  • Lift truck

    Statutory requirements may include but is not limited to:
  • OHS Act
  • SABS 0142, and
  • Local Authority requirements

    Supervise may include but are not limited to:
  • Inspect quality of work done
  • Identifying hazards
  • Writing of procedures
  • Explain procedures

    Team leader may include but are not limited to:
  • A qualified machine maintainer
  • Supervisor
  • Superintendent

    Tools may include but are not limited to:
  • Hand tools
  • Power tools
  • Measuring instruments (Electrical and Mechanical)

    Work area may include but are not limited to:
  • Offices
  • Workshops
  • Processing machinery

    Working facility may include but are not limited to:
  • Work bench
  • Machine test table

    Work platforms may include but are not limited to:
  • Stepladders
  • Ladders

    Work site procedures may include but are not limited to company`s:
  • Safety procedures as given in safety manuals
  • Policy procedures as given in policy manuals
  • Installing procedures as given in manufacturers` and company maintenance manuals
  • Maintaining procedure given in manufacturers` and company maintenance manuals

    Context specific:
  • User manuals supplied by manufacturers
  • Specifications, agreements and policies and procedures 
    		•

    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.