In the event of power failure UPS should support a minimum of 15 minutes, 2 and sufficient to support a pending operation of generators (Generator) (structure UPS and Generator is a 2 (n + 1)).
When the event of power failure, UPS should provide at least 15 minutes 2. And enough to service support between the pending work of the generator (Generator) (structural UPS and Generator is traditional. 2 (n 1)).