Specifications

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www.eaton.com/powerquality 1300 UPS UPS
Energy Advantage Architecture – Variable Module Management System
Variable Module
Management System
(VMMS)
Variable Management Module System (VMMS)
is a key component of Energy Advantage Architecture. Eaton VMMS
technology maximises UPS efficiencies at low load levels while
supplying the load with continuous double-conversion power. Most UPS
installations are only loaded between 20-40%, but UPSs are not optimally
efficient when used at these lighter loads.
Existing method for increasing load percentage
The existing approach to capturing efficiency from low load levels
applied only to multi-UPS parallel systems. The system can increase
the effective load percentage by putting entire UPSs into idle. While
this helps improve efficiency slightly, it is limited to multi-UPS parallel
systems, and flexibility to adapt to the load can only be done in the large
steps of full UPS capacity.
The VMMS way
VMMS optimally employs UPMs to achieve higher efficiencies in double-
conversion mode in order to maximise the load level on remaining
active UPMs by setting UPMs that are not needed to ready state.* This
is calculated according to VMMS load threshold of the UPMs – 80% by
default – and the system configuration (redundancy requirements). This
results in maximised energy savings.
VMMS is possible thanks to Eaton Power Xpert 9395 UPS modularity,
and VMMS applies even in single-UPS systems. Upon a load increase
on critical bus, all ready state UPMs are able to react quickly and revert
to double-conversion mode in less than 2 ms by connecting the existing
PWM signals to the IGBT gates.
Extensive Configurability
Customers can decide how to configure their system
establishing the number of redundant UPMs and the
maximum load level per UPM.
VMMS can be used in single (multiple-UPM), and multi-UPS
Power Xpert 9395 systems
• Single 9395 units from 550 kVA to 1100 kVA
• Distributed parallel systems (Xx275, Xx550, Xx825, Xx1100)
• SBM centralised bypass system
Earlier installations can also be upgraded with VMMS
Applications
Applications where VMMS is particularly efficient:
• Redundant N+1 and 2N systems – Lightly loaded: <45% load level
• Critical data centres, especially when UPS feeds dual corded servers
• Any applications where load varies frequently
Availability
VMMS is available to all 9395 UPSs. All earlier made installations can be
upgraded with VMMS capability.