Battery Operation: Load Power Supplied By Ups Battery; Figure 3-3 Single Line Diagram - Battery Operation - Load Fed By Battery - Toshiba G9000 SERIES Installation And Operation 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.
3.2.3

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
Figure 3-3 Single Line Diagram - Battery Operation – Load Fed by Battery
Figure 3-3 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 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 recharge the batteries.
A fully charged battery will provide power for the specified time at the rated load, or longer, at
G9000 1000-2000kVA Installation and Operation Manual 91469-007
52 S
Bypass Module
CB 3
Static Transfer
Switch
CONVERTER / INVERTER
CB 1
CHARGER
CB2
CONVERTER / INVERTER
CB 1
CHARGER
CB2
CONVERTER / INVERTER
CB 1
CHARGER
CB2
UPS
CABINET
52 C
UPS Module
52 C
3 ~ 6 UPS
modules
UPS Module
52 C
UPS Module
Output
11