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.
3.2.3

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.)
When power is restored after a low battery shutdown, the UPS converter(s) automatically restarts
operation, the charger(s) recharges the batteries and the Inverter(s) is automatically restarted without
operator intervention. Load is automatically assumed by the inverter without operator intervention.
(s): In the case of the Parallel Operation.)
The power drawn by the load is equally shared between all UPS regardless of the presence or
absence of the UPS that is (are) in battery operation or not whenever the system is in the Parallel
Operation.
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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
(*