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4.2 Operation modes
This section describes the different possible operation modes of the UPS explaining the function of the main
modules of the UPS.
4.2.1 Normal VFI Operation Mode (Voltage Frequency Independent)
Under
normal
conditions
permanently powered by the Inverter with
constant amplitude and frequency.
The Rectifier, powered by the Utility, supplies
the Inverter and the Battery-charger keeps the
Battery fully charged.
The Inverter converts the DC voltage in a new
AC sine wave voltage with constant amplitude
and frequency independently from the input
Utility Power.
4.2.2 eBoost™ Operation Mode (option)
eBoost™
e
High efficiency (up to 99.0%)
Boost
Fast power transfer (< 2ms)
When
the
eBoost™
selected, and the Utility Power is available, the
Load
is
normally
powered
Automatic Bypass.
When the Utility Voltage is detected out of the
prescribed
tolerances,
automatically transferred to the Inverter.
When the Utility recovers, the Load returns to the Automatic Bypass after a variable time defined by the control
unit.
The eBoost™ Operation Mode can be used for single units or the RPA Parallel System, for up to 6 UPS modules,
with all units individually able to supply power through a redundant communication bus.
The eBoost™ Operation Mode can be configured directly by the user for higher efficiency, considering the Utility
reliability and criticality of the Load.
The selection between the two operation modes "VFI mode and eBoost™ Operation Mode", or switching
between operation modes at required time, can be done through the UPS Control Panel (see Section 6.4 /
eBoost).
Note!
The eBoost™ Operation Mode is available only if enabled at the factory by an ABB Service
Technician.
the
Load
is
Operation
Mode
is
through the
the
Load
is
MegaFlex 1000 to 1600
Fig. 4.2.1-1 Block diagram normal operation mode
Fig. 4.2.2-1 Energy flow in eBoost™ Operation Mode
UPS User Manual / REV-A
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