Variable Module Management System And High Alert Modes; Monitoring And Communication - Eaton PowerXpert 9395P-600/600 Installation And Operation Manual

1.4.10
1.4.11
Eaton Power Xpert 9395P-600 (380V-600V) UPS Installation and Operation Manual
In High Alert mode the unit transfers from Energy Saver mode to double-conversion
mode or if in double-conversion mode remains in double-conversion mode for a
default time period of one hour. High Alert mode allows the user to place the unit in
double-conversion mode when outside conditions could cause a power disturbance.
At the completion of the time period, the unit defaults back to Energy Saver mode. If
the High Alert command is received during the time period, the timer will be
restarted.

Variable Module Management System and High Alert Modes

NOTE Variable Module Management System and Energy Saver modes are mutually exclusive.
Variable Module Management (VMMS) maintains UPM redundancy and achieves
higher efficiencies by intelligently controlling the UPM's load level. The efficiency
rating for each UPM is highest when loads are greater than 50% of the system rating.
Therefore, shifting the load to fewer UPMs can achieve higher efficiencies when the
UPS load is lighter.
In VMMS mode, the UPS is actively monitoring the critical bus and UPMs are
available to assume load in less then 2 ms to respond to load changes.
The VMMS feature has three configurable modes of operation: Online mode, Online
mode with VMMS, and High Alert mode. All modes are selectable from the front
panel.
VMMS mode supports both distributed bypass and SBM parallel configurations.
In High Alert mode, all idle UPMs go online for one hour. At the completion of the
hour, the UPS defaults back to VMMS mode. If the high alert command is received
during the one hour, the one hour timer will be restarted.

Monitoring and Communication

The UPS system can be further enhanced by adding optional accessories such as a
Remote Emergency Power-off (REPO) control, RMP II, SCM II, RIM II, or X-Slot
communication cards. See Chapter 5 , "Options," for additional information.
S
www.eaton.com/powerquality
P-164000710 Rev 1
INTRODUCTION
1-9