Emerson SERIES 600T Manuel D’Utilisation

The Liebert FS is a modular system composed as follows:

• Control Panel
• UPS Interconnection Kit
• Power Conversion Module
• Main Control Module
• Flywheel Module
• E-Stop (optional-special order)

Components are illustrated in Figure 35.

The Liebert FS uses a control panel as the primary means for an operator to interface with the sys-

tem.

The UPS Interconnection Kit is a module that enables the physical interconnection of the Liebert FS 

and a UPS system. There are several versions that vary, depending on the UPS model.
The Liebert FS is delivered with a UPS interconnection kit consisting of a circuit breaker for connec-

tion of the positive and negative terminals coming from the UPS DC bus or from an external discon-

nect switch.

The power conversion module is a bi-directional power electronics-based power converter capable of 

sourcing or sinking power to and from the UPS DC bus.
While performing the Liebert FS’s backup power mission, the power conversion module converts 

“variable frequency - variable voltage” AC power from the Liebert FS’ motor-generator and delivers 

regulated DC voltage output to the UPS DC bus.
Conversely, for the Liebert FS’s needs in charging power, the power conversion module converts DC 

power from the UPS DC bus into “variable frequency - variable voltage” AC power for the Liebert FS’ 

motor-generator.

The Main Control Module provides the overall control of the Liebert FS as well as the specific control 

for:

• Motor-generator
• Active magnetic levitation hardware

The Flywheel Module houses several major components:

• Motor-generator—synchronous reluctance technology
• Rotating group—high-speed carbon composite flywheel, high-speed shaft and rotor of the motor-

generator

• 5-axis active magnetic levitation hardware
• Molecular vacuum pump

The E-Stop is an Emergency Stop that allows the Liebert FS to disconnect from the UPS. The E-Stop 

is a CE requirement for systems shipping to Europe (and other areas requiring the CE Mark). The 

feature is available elsewhere as an option. Two choices are available for how the E-Stop is powered, 

internally or externally. If E-Stop is activated, Liebert FS will enter a self-discharge and shutdown 

mode.