MASTERYS BC
from 15 to 20 kVA
19
ENGLISH
4.1 ON LINE OPERATIONS.
A special feature of the MASTERYS™ series is the “ON LINE” double conversion feature in conjunction with low
distortion mains power absorption. With ON LINE mode, the UPS is able to supply a voltage that is fully stabi-
lised in frequency and amplitude, regardless of any interference in the mains power supply within the most
stringent classification of UPS regulations.
ON LINE operation provides three operating modes according to mains and load conditions:
• “Normale” mode.
This is the most frequent operating condition: the energy is drawn from the primary mains power supply and
is converted and used by the inverter to generate the output voltage to power the loads connected.
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 case 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 onto the auxiliary mains via the automatic bypass. Normal operation, which is from
inverter, returns automatically a few seconds after the overload disappears.
- when the voltage generated by the inverter goes is out of tolerances due to a major overload or a fault on the
inverter.
- wWhen the internal temperature exceeds the maximum value allowed.
• “Battery” mode.
In the event of a mains failure (micro interruptions or extended black-outs), the UPS continues to power the
load using the energy stored in the battery. The Expert Battery System keeps the user constantly informed on
the battery status and on the back-up time available. The disconnection of non mission critical applications
during battery discharge can be programmed (after a certain laps of time) by using the Power Share option,
so that the battery resources can be reserved for the most critical applications.
4.2 OPERATION IN HIGH EFFICIENCY MODE .
The UPS has a selectable and programmable “economy” operating mode that can increase overall efficiency by
up to 98% for energy saving purposes. With this mode of operation, specific daily or weekly time intervals can
be selected and programmed to power the applications directly from the auxiliary mains. If the power supply
outage, the UPS will automatically switch onto the inverter and continue to supply power to the load by draw-
ing energy from the battery.
This mode does not provide perfect stability in frequency and voltage like the ON LINE mode. Thus the use of
this mode should be carefully evaluated according to the level of protection required by the application.
• Eco-Mode Operation: the Eco Mode operation provides very high efficiency, since the application is pow-
ered directly from the auxiliary mains via the automatic bypass in normal operating conditions.
4
MODES OF OPERATION
Summary of Contents for Masterys MAS2BC115M+D1
Page 1: ...INSTALLATION AND OPERATING MANUAL MASTERYS BC from 15 to 20 kVA...
Page 2: ...ITALIANO...
Page 48: ...ITALIANO FRAN AIS...
