Toshiba G9000 operation manual Single Line Diagram Battery Operation

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

Bypass	CB		52S
Input	User supplied
		CB3
	MCCB		Static Transfer
			Switch
		CONVERTER	INVERTER
AC	CB		CB
			Output
Input
	User supplied	CB1	52C
	MCCB
		CHARGER
	CB2
External	Battery	UPS Module	Power Flow
Battery	Cabinet		Not in Use

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.

* (s) : In the case of the Parallel Operation

10 G9000 Installation and Operation Manual