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22-Elec-A6 Power Systems and Machines: May 2018

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Toroidal Magnetic Circuit
  2. Question 2 Transformer Series Impedance and Efficiency
  3. Question 3 Equivalent Circuit from OC and SC Tests
  4. Question 4 Power-Factor Correction with a Synchronous Motor
  5. Question 5 Short-Answer Concepts

Start with Question 1 →

Paper format. National Exam 22-Elec-A6 Power Systems and Machines (May 2018, code 16-Elec-A6). Closed book; one double-sided aid sheet and an approved calculator permitted. Five questions of equal value constitute a complete paper — all five are worked here as a study resource. All AC quantities are RMS; three-phase voltages are line-to-line and power is total real power unless noted.

Reference texts. S. J. Chapman, Electric Machinery Fundamentals, 5th ed. (magnetic circuits Ch. 1; transformers Ch. 2; synchronous machines Ch. 4; induction machines Ch. 7). J. D. Glover et al., Power System Analysis and Design, 6th ed. (three-phase power and power-factor correction, Ch. 2). IEEE Std 519 (harmonic limits).