About the course:
Low voltage grounding systems are important systems in the field of electrical engineering, closely related to human safety and the safety of electrical equipment from the dangers of electricity, electric shock, and fires. The percentage of fires in the Kingdom due to electrical faults exceeds 89% of total public fires, as announced by the Saudi Electricity Company.
Therefore, one of the key goals of this course is to learn the fundamentals of proper grounding according to international codes and the Saudi code, and to design grounding systems effectively to ensure maximum protection for individuals and facilities from electrical shock hazards.
Course Objectives:
Upon completion of the course, participants will be able to:
– Understand and practically work on installing and designing low voltage grounding systems in residential, private, industrial facilities, hospitals, private and public facilities.
– Design an effective and safe grounding system in construction projects (contracting) or in maintenance operations in existing buildings (facility management) that complies with the Saudi code, Civil Defense requirements, and basic international codes.
– Maintain grounding systems, inspect them, evaluate them, and carry out necessary repairs.
– Build and establish grounding systems, inspect them, and deliver them to consultants in construction projects.
Target Audience:
– Electrical Engineers
– Electrical Supervisors
– Operation and Maintenance Engineers and Facility Managers
– General Safety Engineers and specialties dealing with grounding systems such as civil or mechanical engineering, or those whose job requires dealing with grounding systems.
Main Topics:
Lecture 1: Concepts and details of grounding protection systems
– Definition of grounding
– Impact of electric current on the human body
– How grounding systems work and their operational conditions according to international standards
– Grounding system components and installation methods
– Soil resistance and resistance measurement
– Neutral line vs. grounding line
– Ground fault current concept and behavior in electrical circuits
– Grounding conductors
Lecture 2: Grounding network design
– Calculation of grounding cable section according to standard IEC60364-5-54
– Grounding electrodes, components of the grounding well, and connection methods
– Measurement of soil specific resistance and its enhancement through chemical treatment
– Calculation of grounding electrode resistance
– Design of electrode network and how to enhance earth resistance according to BS 7430 standard
– Measurement of earth resistance
Lecture 3 and 4: Grounding system connection methods according to IEC60364 standards
– TT
– TN
– TNC – TNS – TNC-S
– Installation of the above systems, how they work, advantages, and disadvantages
Lecture 5: Differential current protection
– General principle of differential protection devices
– Types of residual current circuit breakers (according to voltage / according to current)
– Principle of RCCD leakage protection circuit breakers
– Components of RCCD circuit breakers
– Types of RCCD based on circuit type
– Types of RCCD based on load type
– Types of RCCD based on trip time
