Operation Overview; Normal Operation: Load Power Supplied By Each System Ups Inverter; Figure 3-1 Single Line Diagram - Normal Operation: Load Fed By Ups Inverter - Toshiba G9400 Series Installation And Operation Manual

3.2 Operation Overview

The UPS provides two power paths between the utility source and the critical load.
Figure 3-1 shows the path for normal operation, with the load powered by the inverter.
Figure 3-2 shows the path for bypass operation, with the load supplied through the static bypass line. Figure 3-3
shows the path for backup operation, with the load powered by the inverter.
3.2.1

Normal Operation: Load Power Supplied By Each System UPS Inverter

CB
Bypass
Input
Output
supplied
MCCB
CB
AC
input
User
supplied
MCCB
CB
Energy
Storage
System
Power Flow
Not in Use

Figure 3-1 Single Line Diagram - Normal Operation: Load fed by UPS inverter

During normal operation, the path through the UPS inverter is used to power the load.
In Figure 3-1 input AC power is converted to DC by the Converter. DC power is utilized to charge the UPS battery
and to provide power to the Inverter. The Inverter converts the DC power to regulated AC power to supply the
critical load.
G9400 480V 1200-2000kVA Installation and Operation Manual 203078-001
Bypass Module
CB 3
Input
Jumper
CONVERTER / INVERTER
CB 1
CHARGER
CB2
CONVERTER / INVERTER
CB 1
CHARGER
CB2
CONVERTER / INVERTER
CB 1
CHARGER
CB2
52 S
Static Transfer
Switch
52 C
Power module
52 C
Power module
52 C
Power module
UPS
CABINET
Output
3 ~ 5 UPS
modules
9