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Power Supply Systems

Electronics Technology · Level 4  ·  4 Chapters

Compiled by: Martin Gitau

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What Power Supply Systems covers

A power supply turns its input into the steady voltage electronics need, and Power Supply Systems in Electronics Technology Level 4 teaches you to install and test one. You first identify the components: the P-N junction, BJT, transformers, single phase rectifiers, filters, voltage regulators, voltage dividers, DC power converters and protection parts such as fuses. Then you assemble tools, equipment and materials and identify printed circuit boards. Installation looks at the factors to consider, safety, component fixing techniques and troubleshooting, including fault diagnosis and repair or replacement of components. Testing closes the unit: visual inspection, types of tests, testing tools and why testing matters.

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Careers after Power Supply Systems

Electronic equipment of every kind needs a working power supply, so this unit opens doors in installation and repair.

  • Electronics repair workshops in Kakamega - You diagnose faults in power supplies, replace failed components and test the result before returning the equipment. You earn a salary at the bench.
  • Equipment installation firms in Kitale - You choose power supply components for the load and site, fix them safely and test the system on commissioning. You are paid per installation or on a monthly wage.
  • Assembly lines in Athi River - You identify printed circuit boards and components, fix them in place and carry out the visual inspection and tests.
  • Self-employed repair technicians in Garissa - You repair rectifier, filter and regulator stages in customers' equipment and earn per repair.
  • Security and communication equipment installers in Narok - You fit power supply units and protection parts for equipment on customer sites, follow the safety rules for installation and test the supply before handover. You earn a wage or a rate per site.

Fuses and other protection components are checked in every power supply you service.

Chapters

1
Identify power supply components
17 topics
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2
Assemble tools, equipment and materials
7 topics
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3
Install power supply system
8 topics
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4
Test power supply system
11 topics
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What Power Supply Systems covers: 31 main topics in 4 chapters

1. Identify power supply components

  1. 1.1 P-N juction
  2. 1.2 Introduction to BJT
  3. 1.3 BJT configuration
  4. 1.4 Meaning of terms
  5. 1.5 Components of power supply
  6. 1.6 Transformer
  7. 1.7 Single phase rectifiers
  8. 1.8 Filters
  9. 1.9 Voltage regulators
  10. 1.10 Voltage divider
  11. 1.11 DC power converters
  12. 1.12 Protection components of a supply system
  13. 1.13 Fuses
  14. 1.14 Types of fuses
  15. 1.15 Varistor
  16. 1.16 Circuit breakers
  17. 1.17 Types of circuit breakers

2. Assemble tools, equipment and materials

  1. 2.1 Classification of tools used in power supply system installation
  2. 2.2 Printed circuit boards identification

3. Install power supply system

  1. 3.1 Factors to consider in installation of power supply systems
  2. 3.2 Safety during power supply installation
  3. 3.3 Power supply component fixing techniques
  4. 3.4 Troubleshooting
  5. 3.5 Common faults in Electrical equipment's
  6. 3.6 Fault diagnosis procedure
  7. 3.7 Repair/Replace of components in Electrical equipment's

4. Test power supply system

  1. 4.1 Visual inspection
  2. 4.2 Types of tests
  3. 4.3 Testing tools
  4. 4.4 Importance of testing
  5. 4.5 IEE Regulations

Practise this unit

The practical 46 The assessment itself: tools, materials and the marks Step-by-step guide 46 PPE, each step, what good looks like, common mistakes

Revise this unit

Exam-style questions 56 Written to CDACC standard, with answers Test yourself 157 Multiple-choice, one at a time Practise questions 132 Quick recall — check you know the facts
3 more for this unit
Oral exam preparation 36 What the assessor asks, and how to answer out loud Worked calculations 29 Step-by-step maths with the common mistakes Quick cards 791 Myth busters, skill tips and scenarios

Beyond the syllabus

Decision simulator 4 On site, what would you do? Workplace scenarios 80 Real site situations — what would you do? Turn this into income 48 Where this skill earns — what to charge, how to find clients

Other units in Module II