Wärtsilä JOVYSTAR COMPACT L
BAX 5624
- 43 -
11.3 Operating Status
The UPS has five different operating modes, as described below:
Normal operation
Green Conversion
Bypass operation
Battery operation
Manual bypass
11.3.1 Normal operation
During normal operation all the circuit breakers/isolators are closed, except for MBCB (maintenance
bypass).
The rectifier is supplied by the AC three-phase input voltage which, on its turn, feeds the inverter and
compensates mains voltage as well as load variations, keeping the DC voltage constant. At the same
time, it provides to charge the 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 26 – Normal operation
11.3.2 Green Conversion
During the operation in Green Conversion mode the battery is disconnected from the DC bus by
means of a static switch (see picture) and the rectifier works at reduced DC voltage; a control
algorithm provides to periodically re-connect the battery for recharge purposes (intermittent charging).
Picture 27 – Green Conversion
