USV ME400/500/600/650/800
Instruction Manual
ME series
Page 11 of 32
5 System description
The UPS supplies an uninterrupted, single-phase voltage to users with
mission-critical applications. In addition to supplying consumer loads, the
equipment also keeps its internal batteries in a fully charged state. In the event
of a power failure or power fault (e.g. voltage fluctuation), the UPS continues,
without interruption, to deliver a modified sine-wave voltage supply to the UPS
output. In support mode, the energy is drawn from the battery pack.
Fig. 1:
Block diagram
ME series
The block circuit diagram shows the individual modules of the equipment and
provides a general impression of how they interact.
If the mains power failure exceeds the bridging time of the UPS, it shuts down
to prevent deep discharging of the batteries (sleep mode). When the mains
power supply is restored, the UPS restarts automatically, supplies the
consumer loads and controls the charging of the battery pack.
