The UPS after power cut is support batteries store can power supply gives load, standard sex carries battery oneself inside UPS itself machine, can continue commonly after power cut power supply comes a few minutes a few minutes, and group of batteries of the buy outside growing effect UPS to deserve to have, OK and contented user continues for long when power cut the need of power supply, grow effect UPS to be fully loaded with configuration time to be able to amount to number hour above commonly.

Grow effect UPS to reserve commonly time basically suffers size of space of batteries cost, installation and batteries to answer the limitation that fills the element such as time. Be in commonly electric power environment is poorer, the area with relatively frequent power failure uses UPS and dynamo to cooperate the means of power supply, see the principle pursues. When power cut, UPS first by batteries power supply period of time, if power cut time is longer, can start reserve the dynamo continues to UPS power supply, when town report restores again switch reachs city electric power supply.

Time of batteries power supply is calculated

Time of batteries power supply basically gets the factor such as cut-off voltage of discharge of temperature of capacity of laden size, batteries, environment, batteries influence. Time of power supply of batteries of general computation UPS, can calculate a batteries discharge electric current, next according to fish of batteries discharge curve its discharge time. Batteries discharge electric current can calculate by formula of the following experience:
Capacity of =UPS of discharge electric current (VA)× power factor / efficiency of × of UPS volts d.c.

This discharge electric current can regard this UPS as full load mothball a hour of needs batteries capacity, for example APC SU3000UXICH machine, power factor is 0.75 efficiency be 0.8 inside buy volts d.c. is 48V, discharge a hour of batteries capacity that needs 48V-58.59AH, if need mothball 2 hours, namely 58.59 ＊ 2, can choose a group of 48V100AH or two groups of 48V65AH.

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