Power Supply Devices and Systems of Relay Protection brings relay protection and electrical power engineers a single concentrated source of information on auxiliary power supply systems and devices. The book also tackles specific problems and solutions of relay protection power supply systems and devices which are often not dealt with in the literature. The author an experienced engineer with more than 100 patents draws on his own experience to offer practical tested advice to readers. A Guide to Relay Protection Power Supply for Engineers and Technicians The first chapter reviews the electronics and primary elements of the system including transistors thyristors optocouplers logic elements and relays and their principles of operation. This background gives staff who service relay protection power supply systems the necessary electronics knowledge to help them work more effectively with the equipment. The next chapters of the book then cover built-in digital protection relay power supplies battery chargers accumulator batteries uninterruptible power supply and characteristic features of auxiliary DC systems at substations and power plants. The final chapters discuss questions and problems that engineers and technicians may face. These include insulation problems issues in auxiliary DC power supply such as voltage dips and electromagnetic disturbances such as blackouts spikes and surges. The author also explains how to address them. Suitable for beginners and experienced engineers alike the book is written for those who work with relay protection systems and with AC and DC auxiliary power systems in power plants and substations. It combines theory and practical recommendations to provide a valuable reference on power supply devices and systems. . Language: English