Power Supply Devices and Systems of Relay Protection

This book describes the arrangement, mode of action, and problems of secondary power supplies of digital protective relays, stationary accumulator batteries, battery chargers, uninterruptible power supplies, and auxiliary AC and DC power supply systems of substations and power plants. It also tackles the issues of insulation monitoring in DC systems, the problems of monitoring the integrity of a substation battery circuit, problems of voltage dips, and a number of other questions that engineers and technicians may face in working with auxiliary power systems.