Maintenance and Troubleshooting of UPS Systems and Battery Power Supplies

Supplying reliable electric power for critical systems is an essential part of modern industrial installations. Uninterrupted DC emergency power supply systems are used in various installations ranging from power generating stations to consumer-end substations and various applications such as control power to emergency lighting and small but critical motive loads. AC uninterrupted supply equipment find wide use in critical applications such as control, instrumentation, computer and communication systems as well as other types of installations.

Electrical engineers in any industry or other large facilities in diverse areas such as commercial buildings, transportation systems such as railways, airports etc. are bound to come across AC or DC uninterrupted power supply systems. This manual covers the basic understanding of various options of UPS systems available, the principle of operation and of the main energy source in most of the modern UPS installations, viz., the battery.