High voltage engineering is the science of planning, testing and operating high voltage electrical devices, as well as designing insulation coordination to ensure the steady operation of the power network. It ensures that the consumers situated far from the power generation units have access to electrical energy. A higher voltage results in improved efficiency and reduces loss of electricity during transmission over long distances. High voltage engineering optimizes and develops the operating properties of internal and exterior insulators. It is concerned with the proper operation, application and the practical use of high voltages and high fields. Furthermore, it studies the properties of materials used for electrical insulation for estimating their performance under high stress during their life span under various physical conditions. The stress on the insulation caused by the electric field serves as the foundation for the design of high voltage equipment, where magnitude of the stress depends on the type of voltage. This book contains some path-breaking studies in the field of high voltage engineering. Researchers and students in this field will be assisted by it.