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MITSUBISHI ELECTRIC 9800A SERIES UPS
MITSUBISHI
ELECTRIC
9800A SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-7
C) Battery operation: Load Power supplied by each system UPS battery and inverter.
FIGURE 1.3 Single Line Diagram - Battery Operation
Referring to Figure 1.3: In the event of AC input source failure or interruption, each
system UPS rectifier will de-energize and each UPS battery will immediately discharge
and supply DC power to the Inverter to maintain continuous AC power to the load. This
operation will continue until:
a) The battery capacity expires and the inverter turns off, or
b) Input power is restored after which the rectifier will power the inverter and critical load
and simultaneously recharge the batteries.
A fully charged battery will provide power for the specified time at the rated load, or longer,
at a reduced load.
When power is restored after a low battery shutdown, each system UPS Rectifier
automatically restarts operation, recharges the batteries and the Inverter is automatically
restarted without operator intervention. Load is automatically assumed by the inverter
without operator intervention.
The power drawn by the load is equally shared between all system UPS during battery
operation.
CB1
Static Transfer
Switch
AC Bypass
In
p
ut
AC input
CB
CB3
52S
52C
User supplied
MCCB
UPS Module Battery cabinet
CB2
Power Flow
Not in Use
RECTIFIER
INVERTER
Output