LEGRAND KEOR LP 1 Manuel D'installation page 35

The table below provides a summary of the UPS operating modes under various utility AC power
source and battery conditions.
Utility Condition
Normal
Abnormal
(under or over
voltage or absent)
Utility abnormal or
absent, and battery
voltage low
When Utility is Normal
The operating mode of the UPS under normal utility conditions is illustrated as follows.
When the utility is normal the AC source is rectified to DC and fed into the charger to charge the
batteries and partially fed into the inverter. The inverter reverts the DC to a cleaned and pure AC to
supply energy to the load connected. The LEDs
UPS Operating Mode
Working power starts after approximately
5 seconds, LEDs on the panel will blink and
fans will start. Press the ON button
seconds. The UPS starts up normally.
Rectifier and charger stop operating. Battery
discharges via DC-DC boost circuit and supplies
Inverter. Loads continue to receive supply
from Inverter. Alarm buzzer beeps. UPS now in
battery mode.
Rectifier and charger stop operating. Battery
discharges via DC-DC boost circuit and supplies
Inverter. Alarm buzzer beeps quickly, indicating
battery power low and Inverter may stop
supplying soon.
KEOR LP 1, 2, 3 kVA
for 1-5
1
1
, , and will shine.
1
2
2
2
LEDs
LED ON
1
LED ON
1
LED ON
1
2
LED ON
2
2
LED OFF
LED ON
1
1
2
LED OFF
2
LED ON
LED ON
1
1
2
2
1
2
1
1
2
2
Figure 5.2
35