6
Power Innovations
INTegral Line-Interactive Uninterruptible Power Supply
—650 VA
Italic type
—Used to refer readers to another chapter or section.
Bold type
—Used to reference figures included on the same or following pages.
1.3—Power Flow
In the
INTegral Line-Interactive UPS System
, AC utility power flows through two main loops: the AC loop and the battery
charging loop (
Figure 3
).
Figure 3: Power Flow for
INTegral
Line-interactive system
1.3.1
—Normal Power Mode
When functioning normally, the system will power the load and charge batteries to operate when utility power is
unstable. This method of battery backup provides a cost-effective means of providing reliable, uninterruptible power
and increasing UPS efficiency to save you money.
In the AC loop, the power comes from AC utility input such as a wall outlet and passes through a static switch to
support power to the load so long as power is clean and reliable
(Figure 4)
.
In the battery charging loop, an AC/DC converter changes AC utility input voltage into DC power, which charges the
system’s batteries.
Figure 4: Power flow during Normal Power Mode
