OMD10078 rev F
6
1.
UPS GENERAL DESCRIPTION
The UPS of the B9000FXS 60÷160kVA series is the type “ON LINE DOUBLE
CONVERSION” and is connected between main power and user loads (see picture 1).
As far as architecture and lay-out is concerned, this project is optimised with particular
care in order to make it suitable for applications where reliability and high performances
are fundamental for critical loads.
The UPS operation is optimised by microprocessor digital control and the IGBT
inverter is based on a high frequency PWM waveform.
The whole UPS is monitored by a DSP 32 bit microprocessor, implementing full
digital control of the system.
Procedures for power-on, power-off, switching to and from bypass are described step
by step on LCD display, so to help users to easily operate the UPS.
Results of electrical measurement, alarm, work condition, event log and battery state
are indicated real time on the display.
Picture 1 – UPS block diagram
With this configuration UPS guarantees high quality output, needed by loads
requiring stable and clean source of power. The main features are:
Protection for black-out, in the limits of battery autonomy
Complete filtering of mains power noise
High quality output power, provided under any condition of input power and
loads
Stable output frequency, independent from input frequency
Full compatibility with every type of load
Configurable with any neutral wire configuration (under request)
Automatic control of battery, during both charging and discharging phases
Easy to interface with monitoring devices
Auto-diagnostic
feature and troubleshooting support
Flexibility of complete bypass configuration
Full access from the front and from the roof for maintenance
The block diagram shows the UPS subsystems that will be analysed in the following
chapters:
Rectifier/Battery Charger (R)
Inverter
(I)
Battery
(B)
