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Electrical Principles II

Electronics Engineering · Level 5  ·  3 Chapters

Compiled by: Faith Akoth

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What Electrical Principles II covers

Electrical Principles II in Electronics Engineering Level 5 turns to rotating machines, three phase supply and the behaviour of circuits when they are switched. You identify electrical machines, study how they operate and are controlled, derive the generator e.m.f. equation and work calculations on their applications. Three phase power covers generation, connections, calculations and measurements. Transients in DC circuits cover growth and decay in R-L and R-C circuits, the time constant when switching inductive and capacitive loads, and passive and active filters.

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Careers after Electrical Principles II

Machines, three phase supplies and switching behaviour sit behind most industrial electrical work, and this unit prepares you to understand them.

  • Machine servicing workshops in Nyeri - You identify motors and generators, understand how they operate and are controlled, and calculate their performance. You are paid a wage as a technician.
  • Industrial electrical teams in Mombasa - You work on three phase connections, take measurements of three phase supplies and calculate the loads. You earn a monthly salary or a rate per contract.
  • Electronics service benches in Kisumu - You analyse passive and active filters and the way R-L and R-C circuits grow and decay when switched.
  • Self-employed electrical technicians in Kitui - You repair and service small machines for farms and workshops, using the calculations from this unit to check ratings. You earn per job.

The calculations in this unit are what let you check a machine against its rating.

Chapters

1
Apply electrical machines
11 topics
Open chapter →
2
Apply three phase power supply
8 topics
Open chapter →
3
Apply transients in DC Circuits
5 topics
Open chapter →
What Electrical Principles II covers: 13 main topics in 3 chapters

1. Apply electrical machines

  1. 1.1 Electrical machines identification
  2. 1.2 electrical machines operations
  3. 1.3 Derivation of generator e.m.f equation
  4. 1.4 Electrical machine control
  5. 1.5 Calculations involving electrical machines
  6. 1.6 Applications of electrical machines

2. Apply three phase power supply

  1. 2.1 Principles of three phase power generation
  2. 2.2 Connections of three phase power supply
  3. 2.3 Calculations involving three phase power supply connections
  4. 2.4 Measurements of three phase power supply

3. Apply transients in DC Circuits

  1. 3.1 Derivation of growth and decay equations in R-L and R-C circuits
  2. 3.2 Application of the effect of time constant in switching inductive and capacitive loads
  3. 3.3 Analysis of Passive and Active Filters

Practise this unit

The practical 31 The assessment itself: tools, materials and the marks Step-by-step guide 31 PPE, each step, what good looks like, common mistakes

Revise this unit

Exam-style questions 42 Written to CDACC standard, with answers Test yourself 124 Multiple-choice, one at a time Practise questions Quick recall — check you know the facts
3 more for this unit
Oral exam preparation 30 What the assessor asks, and how to answer out loud Worked calculations 23 Step-by-step maths with the common mistakes Quick cards 605 Myth busters, skill tips and scenarios

Beyond the syllabus

Decision simulator 3 On site, what would you do? Workplace scenarios 61 Real site situations — what would you do? Turn this into income 36 Where this skill earns — what to charge, how to find clients

Other units in Module IV