Theory of Operation
ONePlus UPS User Instruction Manual 7
Theory of
Operation
The ONePlus UPS has two operating modes:
Conditioned AC Power and Conditioned Battery
Backup.
AC Power Mode
When utility AC power is present and within the
correct voltage range, the UPS provides fully
conditioned power:
• Electronic equipment is protected from harmful
transient voltage spikes and other electrical
noise.
• UPS detector circuits continuously monitor the
utility power for blackout, low voltage, and
overvoltage events.
The buck and boost feature will compensate for a
wide range of voltage variations without depleting
the batteries.
Battery Backup
Mode
In an extreme over- or under-voltage situation, the
detector circuits determine that utility AC power is
no longer in an appropriate voltage range. The UPS
switches to battery to supply continuous conditioned
power.
While in backup mode, detector circuits monitor the
return of utility AC power. The UPS synchronizes
with the utility’s frequency when utility AC power is
available. The equipment is supplied continuously
with conditioned power even when running in
battery backup mode.
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