Alpha Technologies FXM350_Micro350 UPS - Manual (Page 39)

37 017-241-B0 Rev B
6.2.1 Line Mode
AC EMI
Battery
Input
Output(s)
Inverter/
Charger
120
INV
120
108
132
N
6.2.1.1 Boost Mode
When the input voltage drops, a reduction
in output voltage is prevented by increas-
ing the ratio of primary to secondary
windings in the transformer. The ratio is
increased by using a relay to change the
transformer taps.
6.2.1.2 Buck Mode
When the input voltage increases, an
increase in output voltage is prevented by
decreasing the ratio of primary to second-
ary windings in the transformer. The ratio
is decreased by using a relay to change
the transformer taps.
Input
120
108
132
N
120
INV
Input
120
108
132
N
120
INV
In line mode, the voltage input equals the voltage output. The FXM350 has Automatic Voltage Regulation
(AVR) to maintain the output voltage within the regulation range.
Grid relay
Grid relay
Grid relay