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Answer Posted / sam khanji
UPS stands for uninterruptable power supply. supply only DC
current.
mainly use as a stand by power supply for DC equipment like
computers, access controls.
It has an interior batteries which are able to supply for
complete six hours. this period is enough to restore all
the information need during the failure of power. Usually
it is always connected to AC power and has a toggle switch
which will be active in case of power failure.
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