Measurements and Alternating Current Circuits


Educational goals

The aim of the course is to introduce the student to the theory of measurements and then to understand and analyze the electrical circuits with sine wave excitation at steady state. Also, evaluate and analyze three-phase circuits, magnetic circuits, the Fourier method and identify the transient behavior of the circuits. In the laboratory, the student will be able to handle basic electrical measuring instruments, become familiar with electrical components, and acquire skills in the assembling electrical circuits. Specific objectives of the course are for the student to be able to:

  • Understand the measurement process.
  • Recognize and interpret the characteristics of sine voltage, complex impedance and phasors.
  • Solve circuits with sinusoidal excitation, using various methodologies.
  • Recognize and interpret the advantages of the three-phase system and solve mathematical problems in three-phase circuits of all categories.
  • Describe and explain the operation and structure of the transformer.
  • Recognize the transient period of electrical circuits and solve related mathematical problems.
  • Analyze and design basic electrical installations.
General Skills
  • Search, analyze and synthesize data and information, using the necessary technologies.
  • Decision making.
  • Independent work.
  • Exercising criticism and self-criticism.
  • Promoting free, creative and inductive thinking.

Course Contents

Measurement theory and errors.
Electrical measuring instruments.
Complex impedance and phasors.
● AC circuits.
Active, inactive and apparent power. Power factor correction.
● Circuit resonance.
Three-phase systems.
Symmetric and non-symmetric load in Y and delta connection.
Definition of power in three-phase systems.
The Fourier method in circuit analysis.
Transient analysis in RL, RC and RLC circuits.
Mutual induction and transformers.
Electrical installations (conductors and cables, charging, protection devices, switchboards, relays).

Teaching Methods - Evaluation

Teaching Method
  • Face to face theoretical teaching.
  • Laboratory training in small groups of students.
Use of ICT means
  • Use of Power Point Presentations software.
  • Use of the online learning platform (moodle).
  • Contact students via email.
Teaching Organization
Activity Semester workload
Laboratory exercises26
Weekly preparation of laboratory work26
Individual study and analysis of literature76
Total 180
Students evaluation

I. Written Final Exam (WE), which is in the form of problem solving with distinct difficulty and the free use of any book.

II. Evaluation of deliverable laboratory exercises (LE).

The course grade is derived from WE * 0.6 + LE * 0.4 and must be at least five (5.0).

The grade in each of the two assessment methods must be at least four (4.0).

The evaluation criteria are notified to the students through the course web page and also during the lectures.

Recommended Bibliography

Recommended Bibliography through "Eudoxus"
  1. Iordanis Kioskeridis, “Renewable Energy Sources and Power Electronics Applications”, Publications A. Tziolas, 2nd Edition 2019, ISBN: 978-960-418-852-9, Book Code at Eudoxos 86055394.
  2. P. Fragos, A. Malamou, “Electric Circuits”, Publisher TSOTRAS AN. ATHANASIOS, 2nd Edition 2017, ISBN: 978-618-5066-90-1, Book Code in Evdoxos: 68385815.
Complementary greek bibliography
  1. (Ελληνικά) Μάργαρης Νίκος Ι, “Ανάλυση ηλεκτρικών κυκλωμάτων”, ΕΚΔΟΣΕΙΣ Α. ΤΖΙΟΛΑ & ΥΙΟΙ Α.Ε., 1η έκδοση 2010, ISBN: 978-960-418-202-2
  2. Λουτρίδης Σπυρίδων, “Ηλεκτρικά Κυκλώματα”, ΕΚΔΟΣΕΙΣ Α. ΤΖΙΟΛΑ & ΥΙΟΙ Α.Ε., 1η έκδοση 2018, ISBN: 978-960-418-585-6
Complementary international bibliography
  1. M. Nahvi, J. Edminister, “Electric Circuits sixth edition”, Schaum’s Outline Series, McGraw-Hill, 2014, ISBN: 9780071830454.
  2. J.W. Nilsson, S. Riedel, “Electric Circuits”, Pearson, 9th edition 2011, ISBN: 9780136114994.
  3. R.C. Dorf, J.A. Svoboda, “Introduction to Electric Circuits”, Wiley, 8th edition 2010, ISBN: 978-0470521571.
Scientific journals
  1. IEEE Transactions on Circuit Theory.
  2. IEEE Transactions on Circuits and Systems.