Title :
UPS with an electric-energy storage function using VRLA batteries
Author :
Kiyokawa, Ichiro ; Tsujikawa, Tomonobu ; Matsushima, Toshio ; Muroyama, Seiichi
Author_Institution :
NTT Facilities Inc., Tokyo, Japan
Abstract :
A UPS with an energy storage function using long-cycle-life VRLA batteries has been developed. Combining the functions of UPS and energy storage is effective to enhance the cost- effectiveness of the UPS. New long-cycle-life VRLA batteries, with capacities of 1000 or 1500 Ah at 2 V, have been developed for the UPS. A cycle life of 3000 or more cycles was estimated from our cycle test. The UPS has been installed in a telecommunications building for field testing. This paper describes the system configuration, electrical characteristics of the UPS and its components, and result of our field test.
Keywords :
energy storage; lead acid batteries; telecommunication power supplies; uninterruptible power supplies; UPS; VRLA batteries; cycle life; cycle test; electric-energy storage function; field testing; telecommunications building; Batteries; Circuits; Condition monitoring; Energy storage; Maintenance; Power supplies; Power system reliability; Remote monitoring; Testing; Uninterruptible power systems;
Conference_Titel :
Telecommunications Energy Conference, 2003. INTELEC '03. The 25th International
Conference_Location :
Yokohama, Japan
Print_ISBN :
4-88552-196-3
