Specifications

Now you can get higher, more
efficient UPS reliability by taking
advantage of Liebert’s world-class
flywheel energy storage technology.
Liebert’s flywheel technology
provides superior performance
without the high cost of ownership
and environmental impact associated
with batteries.
Flywheel Technology
Offers Many Advantages
The compact, lightweight, and
reliable Liebert FS flywheel system
is safe and environmentally friendly.
It offers a low installation cost,
small footprint, low maintenance
and long operating life. It provides
quick recharge and operates under
a wide range of temperatures. The
patented flywheel safety system
provides a safe shutdown under
all circumstances. The flywheel
system’s unique operating features,
such as rapid recharging and broad
operating temperature range, allow
the Liebert FS to be installed in
applications where batteries have
previously been ruled out.
Liebert FS Flywheel
Energy Storage Systems
Are Ideally Suited For:
Data Centers.
Colocation facilities.
Telecommmunications.
Colocation Facilities.
Industrial process equipment.
Commercial facilities.
Medical facilities.
Battery-Free
Solution For Use
With UPS Systems
32
Liebert FS Flywheel System
The Liebert FS flywheel DC energy storage system
is designed to be a more efficient and reliable
alternative to standard battery systems used
with uninterruptible power supply (UPS) systems.
The advanced, high-RPM, composite flywheel
technology used in the Liebert FS provides 200
kW of instant ride-through DC power and voltage
stabilization for approximately 12 seconds—
more than enough for the vast majority of
electrical disturbances.
The Liebert FS can be used as the sole back-up DC
energy device or in conjunction with conventional
battery strings or generator sets. When used along
with batteries, the flywheel system will eliminate
their use for short power fluctuations, helping to
extend life and save capacity for longer outages.
It can also be used alone to provide ride-through
power until back-up generators come on line.
The Liebert FS is engineered to support larger
Liebert UPS systems, including the Liebert Npower,
Liebert Series 610, Liebert NX and Liebert NXL
models. A single flywheel can be sized to support
UPS systems up to 225 kVA. Multiple flywheel
systems can operate in parallel to support larger
systems.
When the primary power source goes down, it’s
vital that the UPS has a reliable DC power source to
deliver energy to the critical loads. The Liebert FS
stores energy kinetically via flywheel inertia rather
than relying on chemical reactions of toxic lead and
sulfuric acid.
Other Liebert FS Flywheel System
Features Include:
Rides load through to generator.
Magnitude increases in reliability/
availability.
Eliminates battery maintenance/
replacement.
Significantly reduces life cycle costs.
Increases productive floor space.
Eliminates floor-loading issues.
Eliminates health & safety issues.
Eliminates environmental issues.
Isolates batteries from cycling.
Rides load through to generator.
Magnitude increases in reliability/
availability.
Minimizes battery maintenance/
replacement.
Significantly reduces costs over
redundant battery strings.
Reliable ride-through energy storage,
with or without batteries.
Liebert Power Monitoring Capabilities
The operation of the Liebert FS Flywheel System
can be monitored using:
Liebert SiteScan
®
Web Centralized
Monitoring System.
Third-Party Monitoring Systems.
For more information, see pages 44 and 45.