Figure 1.3 Single Line Diagram - Battery Operation - Toshiba T90S3S08KS6XSN 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.
CB
Bypass
input
User Supplied
MCCB
CB
AC
input
User Supplied
MCCB
Figure 1.3 shows that 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. (When input power is restored the converter will simultaneously
power the inverter and critical load, and recharge the batteries.)
A fully charged battery will provide power for the specified time at the rated load, or longer, at a
reduced load.
10

FIGURE 1.3 Single Line Diagram - Battery Operation

UPS Module
CONVERTER
/ CHARGER
CB1
Battery Cabinet
External
BATTERY
52S
Static Transfer
Switch
CB3
INVERTER
52C
CB2
(s)* : In the case of the Parallel Operation
G9000 Installation and Operation Manual
Output
Power Flow
Not in Use