4. Operation
4.1 Operation Modes
The UPS is a double-conversion on-line UPS that may operate in the following alternative modes:
4.1.1 AC Line Mode
The rectifier/charger derives power from the AC mains and supplies DC power to the inverter while floating and boosting charge
to the battery simultaneously. Then, the inverter converts the DC power to AC and supplies to the load.
SINGLE INPUT: Mains Input
Bypass Breaker
AC Input
Input Breaker
Rectifier
Battery Input
Battery Breaker
4.1.2 Battery Mode (Stored Energy Mode)
If the AC mains input power fails, the inverter, which obtains power from the battery, supplies the critical AC load. There is no
power interruption to the critical load. The UPS will automatically return to Normal Mode when AC recovers.
SINGLE INPUT: Mains Input
Maintenance Breaker
Bypass Breaker
AC Input
Input Breaker
Rectifier
Battery Input
Battery Breaker
Maintenance Breaker
Static Bypass
Output Breaker
Inverter
On-line Mode
Figure 4-1: AC Line Mode
Static Bypass
Output Breaker
Inverter
Battery Mode
Figure 4-2: Battery Mode
DUAL INPUT: Mains Input and Bypass Input
Bypass Input
Bypass Breaker
Output
AC Input
Input Breaker
Battery Input
Battery Breaker
DUAL INPUT: Mains Input and Bypass Input
Bypass Input
Bypass Breaker
AC Input
Output
Input Breaker
Battery Input
Battery Breaker
40
Maintenance Breaker
Static Bypass
Output Breaker
Rectifier
Inverter
On-line Mode
Maintenance Breaker
Static Bypass
Output Breaker
Rectifier
Inverter
Battery Mode
Output
Output