John Platts gained his industrial experience during 21 years service with GEC, including six years in Canada. He then became a private consultant operating mainly for Ewbank Preece Limited. His main interest is in the efficient and effective utilisation of energy, aiming to satisfy the diverse requirements of industrial commercial enterprises. The frequent concern of customers about reliability of the public electricity supply led to his interest in UPS for critical equipment and processes.John St Aubyn was editor-in-chief at the IEE for some 30 years. He then worked as an editorial consultant before retiring in 1996. With a background in physics, he was engaged in radar work with the British Army during the Second World War. After the war, on completing his degree course, he was for a time with Marconi Instruments.

• Chapter 1: Why the need arisesChapter 2: History and market growthChapter 3: Dynamic systems with battery energyChapter 4: Rotary systems with integral diesel engineChapter 5: Static thyristor inverter system with battery energy storeChapter 6: Static transistor UPS incorporating battery backupChapter 7: BatteriesChapter 8: Applications to air transportationChapter 9: Applications to telecommunicationsChapter 10: Harmonic distortion of UPS input and output voltagesChapter 11: UPS reliabilityChapter 12: The specification

John Platts gained his industrial experience during 21 years service with GEC, including six years in Canada. He then became a private consultant operating mainly for Ewbank Preece Limited. His main interest is in the efficient and effective utilisation of energy, aiming to satisfy the diverse requirements of industrial commercial enterprises. The frequent concern of customers about reliability of the public electricity supply led to his interest in UPS for critical equipment and processes.John St Aubyn was editor-in-chief at the IEE for some 30 years. He then worked as an editorial consultant before retiring in 1996. With a background in physics, he was engaged in radar work with the British Army during the Second World War. After the war, on completing his degree course, he was for a time with Marconi Instruments.

• Chapter 1: Why the need arisesChapter 2: History and market growthChapter 3: Dynamic systems with battery energyChapter 4: Rotary systems with integral diesel engineChapter 5: Static thyristor inverter system with battery energy storeChapter 6: Static transistor UPS incorporating battery backupChapter 7: BatteriesChapter 8: Applications to air transportationChapter 9: Applications to telecommunicationsChapter 10: Harmonic distortion of UPS input and output voltagesChapter 11: UPS reliabilityChapter 12: The specification

John Platts gained his industrial experience during 21 years service with GEC, including six years in Canada. He then became a private consultant operating mainly for Ewbank Preece Limited. His main interest is in the efficient and effective utilisation of energy, aiming to satisfy the diverse requirements of industrial commercial enterprises. The frequent concern of customers about reliability of the public electricity supply led to his interest in UPS for critical equipment and processes.John St Aubyn was editor-in-chief at the IEE for some 30 years. He then worked as an editorial consultant before retiring in 1996. With a background in physics, he was engaged in radar work with the British Army during the Second World War. After the war, on completing his degree course, he was for a time with Marconi Instruments.

• Chapter 1: Why the need arisesChapter 2: History and market growthChapter 3: Dynamic systems with battery energyChapter 4: Rotary systems with integral diesel engineChapter 5: Static thyristor inverter system with battery energy storeChapter 6: Static transistor UPS incorporating battery backupChapter 7: BatteriesChapter 8: Applications to air transportationChapter 9: Applications to telecommunicationsChapter 10: Harmonic distortion of UPS input and output voltagesChapter 11: UPS reliabilityChapter 12: The specification