6
MODES OF OPERATION
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 AC Mains 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. The 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. The user can also program
two auto restart delay settings:
1. Battery capacity level (%)
2. Countdown timer
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.
220V - standard
230/240V - optional
MANUAL
BYPASS
POWER
CONTROL
EMI
Filter
POWER
MODULE(S)
EMI
Filter
OUTPUT &
BYPASS
CONTACTOR
SYSTEM
CONTROL
MODULE
SYSTEM
CONTROL
MODULE
CONTROL
INTERFACE
USER
INTERFACE
BATTERY
MODULE(S)
COMMUNICATIONS
OUTPUT
TRANSFORMER
INPUT OUTPUT
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