IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 42 di 90 + FR
3.5
Operating modes
The various equipment operating modes are described below.
setting
The operating mode is set when the SAFEPOWER EVO HFT is installed; it may be changed
subsequently but this should always be done by a
specialized technician.
3.5.1 On - line - factory setting -
load always powered by inverter, in the event of an input mains failure the load
continues to be powered from the inverter using the energy stored by the batteries.
On
–
line:
The load is always powered by the inverter, with stabilized voltage and frequency,
using the energy from the mains power supply (INPUT). If there is a fault in the
INPUT, the UPS will switch to the batteries in zero time and the batteries will
supply energy to the inverter to keep the load powered (for the backup time of the
batteries). When the INPUT is restored the batteries will be automatically
recharged by the rectifier.
3.5.2 Standby-on / Smart active
load powered from the mains, in the event of an input mains failure the load is
powered from the inverter using the energy stored by the batteries.
In
Standby On
or
smart active
,
the load is powered from the by-pass line (if the
power supply line is in the acceptance field); if there is a fault on the power supply line,
the load switches automatically onto the inverter, powered by the battery
