21
Operating procedure
The UPS keeps the operator informed regarding its operating status using visual and acoustic signals:
- status indicator 2 on page 24
- acoustic signal (located inside the UPS)
The combination of these signals enables rapid and intuitive understanding of its operating status and
recognition of any problems in the power supply.
There are three main operating modes
- Mains operation
- Battery operation
- By-pass operation
Mains operation
This is considered the normal operating condition:
- mains voltage is converted by the power factor corrector (PFC) into continuous current
- the inverter reconstructs the sinusoidal voltage from the continuous current
- the output filter provides extra “cleaning” of the output voltage
- the batteries are recharged
Battery operation
When there is a mains power failure, the UPS automatically switches over to battery mode.
- the voltage of the batteries is increased by the “booster” circuit
- the inverter reconstructs the sinusoidal voltage from the continuous current
- the output filter ensures the voltage supplied to the load is clean
By-pass operation
The by-pass circuit excludes the UPS and connects the output directly to the input. The switchover takes
place in a synchronised manner in order to ensure the correct output voltage is always guaranteed,
preventing the risk of a break in power or excess voltage.
The intervention of the by-pass circuit can be customised by means of a dedicated menu (Config. UPS,
By-pass) which provides many options (automatic, disabled, by-pass in load waiting mode, etc.) in order to
meet the specific demands of the application.
2 - Operation
2. Operation
