28
CPSS Emergency MASTERYS EM
10 to 80 kVA - Ref.: IOMMASELXX03-GB 00
9. OPERATING MODES
9.1. MODE WITH SWITCHING
A special feature of the MASTERYS series is the 'ON LINE'
double conversion feature in conjunction with low distortion
mains power absorption. In ON LINE mode the UPS is able to
supply a voltage that is fully stabilised in frequency and ampli-
tude, regardless of any interference in the mains power supply
within the most stringent classifi cation of UPS regulations.
ON LINE operation provides three operating modes according
to mains and load conditions:
• Normal mode
This is the most frequent operating condition: the energy is
drawn from the primary mains power supply and is convert-
ed 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 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 onto the auxiliary mains via the 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 is over tolerance 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. The Expert Battery System keeps the user constantly informed on the battery status and on the backup
time available. The disconnection of non-mission critical applications during battery discharge can be programmed (after a certain
lapse of time) by using the Power Share option, so that battery resources can be reserved for the most critical applications.
9.2. MODE WITH NON - PERMANENT SWITCHING
The UPS has a selectable, programmable economy operating
mode (
Eco Mode
) that can increase overall efficiency 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 with the
Normal mode
. 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 specific daily or weekly time
intervals can be selected and programmed to power applications
directly from the auxiliary mains.
Eco Mode
operation provides very high efficiency, since the
application is powered directly from the auxiliary mains via the
automatic bypass under normal operating conditions.
9.1-1
Standard operating mode
9.2-1
Eco Mode
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Thiele KG
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orderer W
einberg 26 • D-71522 Backnang • T
el.: +49 (0)7191 3560-0
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• www
.thiele-kg.de
Thiele KG
• V
orderer W
einberg 26 • D-71522 Backnang • T
el.: +49 (0)7191 3560-0
• Fax.: +49 (0)7191 3560-19
• www
.thiele-kg.de
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