ENE231 Low Voltage and High Voltage Technology (Autumn 2025)

On successful completion of the course, the student should be able to:

• explain key concepts and components of low voltage systems
• describe various techniques and equipment used in the installation, maintenance and repair of low voltage systems, and explain how this work affects the environment
• know the regulations and standards for electrical installation safety
• understand the operation and use of equipment for troubleshooting and measurement
• know the uses of different types of protective devices
• understand overvoltages in high voltage system
• explain breakdown mechanisms in gases and solids
• explain the function and structure of the high voltage components: surge arrester, circuit breaker, re-closer, switch, fuse and cable
• process and lay cables
• use relevant brand and coding systems for materials and equipment
• select the right equipment and materials in relation to certain procedures and tasks and be able to check that tools and equipment are in safe working order before use
• do fault analysis in low voltage and medium voltage network applying symmetrical components
• apply relevant computer tools associated with low voltage(voltage drop and short circuit current)
• perform electrical calculations, calculate the cross-section area and selecting the corresponding protection using available substrates such as tables, charts and computer programs, etc.
• calculate lightning overvoltage in high voltage network using traveling wave model
• calculate voltages, electric field strength and potentials by hand bill
• understand thermography testing of electrical installations

Working with electricity is associated with danger and therefore require accuracy and system overview. The area is highly regulated by laws and regulations, and those who work with electricity must be able to follow safety procedures to prevent accidents. The course emphasizes basic knowledge of laws and regulations for safety. Each task is performed on the basis of evidence, rules and regulations. The purpose of this course is to enable the candidate to understand how skilled workers performs tasks in various live plants in small and large buildings.

The course describes and explains lightning pennies and their propagation in an electrical network by using traveling wave model and reflection diagram. Overvoltages and temporary overvoltages are also presented. High voltage components like cables, fuses, circuit breakers and surge arresters will be processed. The physical processes with regard to the impact mechanism in gases and solids will be discussed and explained.

Lectures, demonstrations, laboratory exercises and exercises done by hand and with the use of computer programs.

Estimated work load for the average student is 27 hours per credit.