Politecnico di Torino
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Politecnico di Torino
Academic Year 2009/10
03BGAAX, 03BGAAY
Electrical Systems
1st degree and Bachelor-level of the Bologna process in Civil Engineering - Vercelli
Master of science-level of the Bologna process in Civil Engineering - Vercelli
Teacher Status SSD Les Ex Lab Tut Years teaching
Chicco Gianfranco ORARIO RICEVIMENTO PO ING-IND/33 50 0 0 0 5
SSD CFU Activities Area context
ING-IND/33 5 C - Affini o integrative Discipline ingegneristiche
Objectives of the course
The course is aimed at providing the students with the essential knowledge concerning the electrical safety and the electrical plants in buildings and building sites. The course addresses various conceptual issues and application practices related to the electrical side in the civil engineering sector, with reference to the present legislation, standards, unification and certification. The course is taught in Italian.
Expected skills
At the end of the course, the student is expected to be able to participate with relatively good competence to technical discussions with personnel working in the specific activities of the electrical plant sector (building sites, management of low voltage electrical plants).
Prerequisites
Prerequisites of the course are the knowledge of the basic electrotechnical concepts (electrical quantities, Ohm's law, Kirchhoff's principles, Thévenin equivalents, basic circuits in direct current and in alternate current, impedance, phasor representation, real, reactive, apparent and complex power, three-phase system structure).
Syllabus
General concepts: Summary of the electrical quantities and of the basic concepts on the electrical circuits. Three-phase systems. Model of the electrical lines. Characteristics and models of the transformers. Classification of the electrical systems on the basis of the rated voltage. Structure of the systems for production, transmission, and distribution of electricity. Details on the Low-Voltage distribution.
Electrical conductors, overcurrents and protections: Electrical cables. Lay-down conditions. Cable nomenclature. Thermal current limits of the cables. Definitions of overcurrent, overload and short-circuit. Circuit protection with circuit breakers and fuses. Electric panelboards. Basic criteria for sizing an electrical distribution plant. Voltage drop criterion. Short-circuit current calculation and choice of the protections.
Electrical safety: Electric shock. Effects of electricity on the human body. Safety curves of alternate, direct and pulse currents. Effects of the path of the electrical current in the human body. First-aid notions. Resistance of the human body. Safety voltages.
Grounding systems: Dispersion of the electric current in the ground. Spatial evolution of the potentials on the ground surface. Touch voltage and step voltage. Characteristics of the earth electrodes. Structure of the grounding system. Equipotential connections. Measurement of the resistance of the grounding system.
Electrical plants in residential buildings: Characteristics of the supply point. Sizing of the plant components. Schemes for the electricity distribution in residential plants. Command of lighting systems and signal circuits. Notes on the tariffs for the residential use of electricity.
Protection against the electric contacts: Classification of the of the exposed conductive parts. Direct contact and indirect contact. Protection against direct contacts. Level of protection of the electrical appliances: the IP code. Protection against indirect contacts. Classification of the systems on the basis for grounding and safety purposes (TT, TN, IT). Characteristics and sizing of the residual circuit breakers. Protection against indirect contacts without circuit interruption.
Regulatory aspects in the electrical sector: Legislation and standards for the electrical plants in the residential sector. Certifications of the electrical equipment and plants. Declaration of conformity. Testing procedures.
Electrical installations in non-ordinary sites: Installations in sites with high electrical risk. Bathrooms and swimming pools. Electrical safety in the building sites. Examples of application.
Protection of the buildings against lightning: Characteristics and diffusion of the lightning in the territory. Determination of the need for protecting the structures against lightning. Characteristics of the internal and external protection systems.
Laboratories and/or exercises
Specific application cases are illustrated and solved during the lectures of the course.
Bibliography
Basic reference material:
- Notes from the lectures and additional material available through the Didactic portal.
- F. Piglione, G.Chicco, Sistemi elettrici industriali. Parte II: Macchine e impianti elettrici, Politeko, Torino, 2007.
Additional references:
- V. Carrescia, Fondamenti di sicurezza elettrica, edizioni TNE, Torino, 1997.
- D. Di Giovanni, La sicurezza degli impianti elettrici, edizioni CEI, Milano, 2006.
Revisions / Exam
The exam is composed of a written test (with solution of exercises, quiz with multiple answers, and open questions), followed by oral discussion of the results, and further possible optional integrative oral discussion upon student's choice. The exam dates are set during the periods indicated by the Faculty.

Programma definitivo per l'A.A.2009/10
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