LEGRAND Keor LP Manual page 13

1. Generally, modern electronics and IT equipment generate an inrush current when switching on.
The amount of inrush current varies from equipment to equipment, sometimes as high as six
times rated capacity, other times negligible. To prevent severe damage to its inverter caused by
the inrush produced by the loads, the UPS is equipped with an electronic overload-protection
feature as standard. If the UPS is loaded over 150% of capacity it will switch into bypass mode until
the load is less than 105%. Then the UPS will switch back to Inverter mode automatically.
2. The UPS Bypass loop is also equipped with overload protection. Its overload capacity is
illustrated by the graphs and table below.
Inverter Failure
Output load short circuit when supplied via inverter
If the output load is short-circuited while supplied via inverter, the UPS will shut down the inverter
automatically and cut the supply to the loads. The Fault LED will shine, and the buzzer will beep
continuously. The UPS will not switch on automatically after the short-circuit condition is eliminated.
The UPS must be restarted manually. (Refer to section 'Start Up in Normal AC Mode' . )
KEOR LP 1, 2, 3 kVA
Figure 5.5
37