Battery Operation: Load Power Supplied By Ups Battery; Figure 3-3 Single Line Diagram - Battery Operation - 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.

Battery Operation: Load Power supplied by UPS battery.

CB
Bypass
Input
User supplied
MCCB
CB
AC
Input
User supplied
MCCB
CB2
External Battery
Battery Cabinet
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 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.
(* (s): In the case of the Parallel Operation.)
G9000 Series UPS 300-750kVA Installation and Operation Manual – 61480-017
CB3
CONVERTER
CB1
CHARGER
UPS Module
Figure 3-3 Single Line Diagram – Battery Operation
52S
Static Transfer
Switch
INVERTER
52C
Power Flow
Not in Use
CB
Output
11