Electrical Engineering

This book presents the first course in electrical engineering for high level technicians working in the fields of electrical systems in medical facilities, medical industries, and other critical facilities. The book focuses on the power supply systems at the medium voltage (MV), and low voltage (LV) levels. It presents the fundamentals and advanced layouts of distribution systems. In addition, various standby power supply options hosted in distribution systems and within specific facilities to supply essential and critical loads are covered from pure technical aspects and practical applications points of view. The economics of such system are indirectly demonstrated. Due to the time limits of the course, and the its wide essential objectives, simplified mathematical models are provided for limits situations; however, the book focuses on the quality of knowledge needed for certificating the target audiences to work in the mentioned electrical systems and their maintenance. This main objective of the course are to: (a) provide a detailed description of electric power systems with a focus on electric distribution subsystems, (b) illustrates the impacts of power supply outages of various load types and (c) state various solutions for enhancing the power supply reliability, and quality. The book consists of five chapters. The first chapter is entitled ‘ElectricPower Systems – An Overview’ and it provides an overview of the subsystems comprising utility grids, and load requirements in the utilization subsystem. The second chapter ‘Electric Power Distribution Systems’ focuses on the layouts of primary and secondary distribution systems for general purpose demands. The requirements for satisfactory operation of the loads are summarized. In addition, design and operational requirements such as voltage regulation and power loss are presented. The third chapter ‘Reliability and Power Quality’ focus on the reliability and power quality requirements, and provides the base background to understand and deal with these aspects. Various standby, emergency, and alternative power supply systems for securing the power supply for important loads are presented in chapter 4, while practical configurations of LV distribution systems hosting Uninterruptable Power Sources (UPSs) are presented in chapter 5