INTRODUCTION
Eaton Power Xpert 9395P-1200 UPS (1200 kVA, 1200 kW) Installation and Operation Manual
S
P-164000500 Rev 4
www.eaton.com/powerquality
1-6
The tie cabinet must contain Module Output Breakers (MOBs) with dual auxiliary
contacts for control of the system. Without dual auxiliary MOBs, UPMs are not
allowed to go to bypass individually during servicing. All UPMs will go to bypass
instead of just the UPM needing service, decreasing critical load protection. With dual
auxiliary MOBs, one UPM can be bypassed while the remaining UPMs support the
load as long as the remaining UPMs have the capacity to do so.
1.3.6
Input Output Module Configuration
The UPS can be supplied in an Input Output Module (IOM) configuration without the
bypass input connections, the static switch, and the backfeed protection contactor.
This configuration is primarily used in multiple UPS parallel systems that do not need
a bypass for each UPS and use a separate System Bypass Module (SBM) to provide
system bypass capabilities.
1.3.7
Continuous Static Switch
A continuous static switch is used to provide transfer of the load from the inverter to
the bypass source in the event the inverter become unavailable.
1.3.8
Inherent Redundancy
To deliver greater reliability, the Eaton 9395P-1200 UPS can be configured by an
authorized Eaton Customer Service Engineer
for inherent redundancy. When
configured, the UPS automatically becomes redundant if the load is at or below the
capacity of the UPMs minus the capacity of one UPM. Under normal conditions the
UPMs in the UPS share the load equally. If one or more UPMs becomes unavailable
and the load is at or below the capacity of remaining UPMs, the remaining UPMs
supply the load instead of transferring to bypass.
If the capacity of the UPMs falls below the redundancy level or the load increases
above redundancy level, but is still able to maintain the load, a loss of redundancy
alarm is sounded. If the load exceeds the capacity of remaining UPMs, the UPS
transfers to bypass.
1.3.9
Energy Saver and High Alert Modes
NOTE
Energy Saver System mode requires the UPS to be factory built with a Continuous Static Switch
(CSS).
NOTE
The Variable Module Management System and Energy Saver System modes are mutually exclusive.
As a subset of Normal mode, Energy Saver mode maximizes efficiency by eliminating
unnecessary power conversion when the commercial power source is within
acceptable voltage and frequency limits. In this mode, the UPS is actively monitoring
the critical bus and instantly and seamlessly transitions to double-conversion mode
(inverter online) if a commercial electrical power brownout, blackout, overvoltage,
undervoltage, or out‐of‐tolerance frequency condition occurs.
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.
Summary of Contents for Power Xpert 9395P-1200
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