Figure 1.3 Single Line Diagram-Battery Operation - Mitsubishi Electric 9900CX SERIES Owner Technical Manual

In the event of a load overcurrent, the UPS transfers to bypass without interruption to the critical
load. In the case of the Parallel Operation, all UPS will transfer to bypass without interruption to
the critical load.
The internal control system determines the operation of the two paths, with the load powered
from the inverter being the normal operation.
C) Battery operation: Load Power supplied by UPS battery.
Figure 1.3 Single Line Diagram - Battery Operation
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:
MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Bypass Module
CB3
Static Transfer
CONVERTER / INVERTER
CB1
CHARGER
CB2
CONVERTER / INVERTER
CB1
CHARGER
CB2
CONVERTER / INVERTER
CB1
CHARGER
CB2
52S
Switch
52C
UPS Module
52C
UPS Module
52C
UPS Module
CABINET
Page Number:
1-11
Output
3～6 UPS
modules
UPS