
OMD10078 rev F
13
1.3
BATTERY
On the B9000FXS 60÷160kVA UPS, the battery is always installed in external
additional cabinets.
The battery charger control logic is completely integrated inside the rectifier control
board; the battery is charged, according to the DIN 41773 Standard, every time it has
been partially or completely discharged. It is kept floating, even when it is charged, to
compensate any auto-discharge.
1.4
STATIC SWITCH
Static switch is composed of thyristors, rated to work continuously at 150% of
nominal output power.
The components connected to the bypass line are protected by fuses.
Picture 11 – Static switch and manual bypass
Thanks to the transfer logic integrated in the control, the load is supplied by the
bypass line even in case of microprocessor failure.