This book provides an extensive review of recent developments in SF6 Switchgear and covers fundamental properties of SF6 interrupter types, characteristics and associated operating mechanisms, arc modelling and computer aided methods for interrupter design and evaluation. The impact of SF6 Technology upon (i) Transmission Switchgear (ii) Distribution and Utility Switchgear and (iii) Regulations, Testing and Instrumentation is dealt with comprehensively.