Modes Of Operation - Liebert Nfinity User Manual

The Nfinity UPS is designed to operate as a true
on-line system in the following modes:
Normal Mode
The Power Module's power factor correction
circuitry derives power from the mains AC
source and supplies regulated DC power to the
inverter. The module's inverter regenerates
precise AC power to supply the connected
equipment. The battery charger maintains a
float-charge on the battery.
Back-Up Mode
When AC mains fails, the connected equipment
is supplied power by the inverter, which obtains
energy from the battery modules.
connected load will not be interrupted during the
failure or restoration of the AC mains source.
Auto Restart Mode
After a power outage and complete battery
discharge, once the AC mains is restored, the
UPS will automatically restart and resume
supplying power to the connected equipment.
This feature is enabled at the factory, but can be
disabled by the user.
program two auto restart delay settings:
1. Battery capacity level (%)
2. Countdown timer

Modes of Operation

The
The user can also
Recharge Mode
When AC mains is restored, the unit will then
automatically recharge the battery modules until
they are fully charged.
Bypass Mode
The bypass provides an alternate path for power
to the connected equipment and operates in the
following manner:
Automatic
In the event of an internal fault or should the
inverter overload capacity be exceeded, the
UPS performs an automatic transfer of the
connected equipment from the inverter to
the bypass source.
Manual
Should the UPS need to be taken out of
service for limited maintenance or repair,
manual activation of the bypass will cause
an immediate transfer of the equipment from
the inverter to the bypass source.
6