LBS DRAGON POWER 3, User Manual, Page: 19 / 62

2Overview User Manual
AC
DC
DC
AC
DC
DC
Bypass input
Mains input
Battery input
Bypass static switch
Charger
Rectification
/PFC
Inverter
Output
Normal mains power supply mode (the thick solid line stands for the energy flow direction)
Battery inverter mode
When mains abnormal, The work mode is as shown in 2032624074.26.264318872 . .
AC
DC
DC
AC
DC
DC
Bypass input
Mains input
Battery input
Bypass static switch
Charger
Rectification
/PFC
Inverter
Output
Battery inverter mode (the thick solid line stands for the energy flow direction)
Before the battery stop discharging, if the mains recover normal, the rectifier will transfer to mains
input automatically and charge the battery at the same time. That is to say, the UPS recover normal
mains power supply mode. If the mains always abnormal and the battery is running up, the UPS will
send sound and light alarm and stop working till battery low-voltage point. At that time, the buzzer
long beeps to alarm, the power for load powers down. Under the circumstance of mains power outage
completely, the UPS will shut down about 1min later automatically and close the power of the UPS to
avoid the battery discharge slimly, thus to protect the service life of battery. Once the mains recovers,
the UPS will start automatically and turn to normal mains power supply mode.