ABSTRACT
In many industrial processes, and particularly for the electrical power distribution systems within plants, highly reliable auxiliary power suppliers are required. Power supply systems that use battery systems to provide energy storage fall into two basic categories: systems that feed direct current (DC) power directly to the individual systems requiring continuous power and systems that provide reliable uninterruptible alternating current power via uninterruptible power systems. Direct DC distribution systems do not usually provide high-speed transfer to an alternative power source; the individual devices fed from such systems are either duplicated or provided with back-up facilities. For any battery-protection fuse arrangement, the fuses should be located as close as possible to the battery. Chargers can use either single- or three-phase power, dependent on the supply type and voltage available and their electrical load. Continuous loads are a significant part of the load cycle when sizing the battery or fixing the standby time that is necessary.
