Picture 2 : Sub-assembly location
Picture 3: Block Diagram for UPS
The block diagram in picture 3 shows the UPS at normal
operation from left to right. When a protection circuit is
triggered or a fault condition occurs, the output supply is
transferred immediately from the inverter to the AC mains
by a bypass relay. This operation will be explained in
another section.
This ON-LINE UPS system resorts to high frequency
PWM techniques to achieve high efficient performance.
When the Full mode is on, the UPS can deliver a clean,
regulated sine-wave output at any load. Each sub-system
is described as follows:
N.F.
CHARGER
DC/DC
N.F.
DC/AC
PFC
AC/DC
RY
BATTERY
I/P
O/P
RY