socomec Masterys BC, Installation And Operating Manual

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MASTERYS BC
100-120 kVA - Ref.: IOMMASBCXX07-EN 05
3. MODES OF OPERATION
3.1. ONLINE OPERATION
A special feature of the MASTERYS BC series is the ON LINE double conversion in conjunction with low distortion mains power
absorption. In Normal Mode (on inverter) the UPS can supply a voltage that is fully stabilised in frequency and amplitude, regard-
less of any interference in the mains power supply, within the most stringent classifi cation of UPS regulations.
ONLINE operation provides three operating modes according to mains and load conditions:
• Inverter mode
This is the most frequent operating condition: energy is drawn from the primary mains power supply and converted and used by
the inverter to generate the output voltage to power the connected loads.
The inverter is constantly synchronised in frequency with the auxiliary mains to enable load transfer (due to an overload or inverter
shutdown) without any break in the power supply to the load.
The battery charger supplies the energy required to maintain or recharge the battery.
• Bypass mode
In the event of inverter failure the load is automatically transferred onto the auxiliary mains without any interruption in the power
supply. This procedure may occur in the following situations:
- in the event of a temporary overload, the inverter continues to power the load. If the condition persists, the UPS output is
switched on to the auxiliary mains via automatic bypass. Normal operation, which is from the inverter, returns automatically a
few seconds after the overload disappears.
- when the voltage generated by the inverter goes outside the limits due to a major overload or a fault on the inverter.
- when the internal temperature exceeds the maximum value allowed.
• Battery mode
In the event of a mains failure (micro interruptions or extended power cuts), the UPS continues to power the load using the energy
stored in the battery.
3.2. OPERATION IN HIGH EFFICIENCY MODE
The UPS allows the selection of a programmable economy operating mode ( Eco Mode ) that can increase overall effi ciency by up
to 99% for energy saving purposes. If the power supply fails the UPS will automatically switch onto the inverter and continue to
supply power to the load by drawing energy from the battery.
This mode does not provide perfect stability in frequency and voltage as the Normal mode does. Therefore the use of this mode
should be carefully evaluated according to the level of protection required by the application.
With the optional board Net Vision (see chapter 7.7) specifi c daily or weekly time intervals can be selected and programmed to
power applications directly from the auxiliary mains.
Eco Mode operation provides very high effi ciency, since the application is powered directly from the auxiliary mains via the auto-
matic bypass under normal operating conditions.
To activate Eco Mode go to MAIN MENU > COMMANDS > ECO MODE and select Activate Eco Mode . To disable Eco Mode ,
select Return to Normal Mode .