This handbook aims to maximize a company's energy output whilst ensuring the reliability and longevity of industrial electrical equipment. It covers various types of transformers, motors, variable-speed drives, generators, rectifiers, inverters and uninterruptible power systems. It also explains diagnostic testing and inspection, advanced-fault detection techniques, critical components and common failure modes. Finally, it covers selection criteria, commissioning requirements, predictive and preventive maintenance, reliability, testing and cost, and explains the maintenance required to minimize operating cost and maximize efficiency, reliability and longevity.