Figure 1.3 Single Line Diagram-Battery Operation - Mitsubishi Electric 9900D Series Owner Technical Manual

C) Battery operation: Load Power supplied by UPS battery.
CB
Bypass
Input
supplied
MCCB
CB
AC
input
User
supplied
MCCB
CB
Battery
Cabinet
External
BATTERY
Power Flow
Not in Use
Referring to Figure 1.3: In the event of AC input source failure or interruption, the UPS
Converter(s)* will de-energize and the UPS battery(s)* 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 converter 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.
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Figure 1.3 Single Line Diagram - Battery Operation
Bypass Module
CB 3
Static Transfer
CONVERTER / INVERTER
CB 1
CHARGER
CONVERTER / INVERTER
CB 1
CHARGER
CONVERTER / INVERTER
CB 1
CHARGER
MITSUBISHI ELECTRIC 9900D SERIES UPS
52 S
Switch
52 C
UPS Module
52 C
UPS Module
52 C
UPS Module
CABINET
(s)* : In the case of the Parallel Operation
Page Number:
1-10
Output
–
3 5 UPS
modules
UPS