OMD10078 rev F
15
2.
OPERATING MODES
2.1
NORMAL OPERATION
During normal operation all the circuit breakers/isolators are closed, except for MBCB
(maintenance bypass).
The three-phase input AC voltage feeds the rectifier via the filter inductor; the rectifier
supplies the inverter and compensates mains voltage fluctuations as well as load
variation, maintaining the DC voltage constant. At the same time it provides to keep the
battery in stand-by (floating charge or boost charge depending on the type of battery).
The inverter converts the DC voltage into an AC sine-wave with stabilized voltage and
frequency, and also supplies the load via its static switch SSI.
Picture 12 – Normal operation
