Eaton Power Xpert 9395 UPS, Инструкция по установке и эксплуатации

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Introduction
1-6 Power Xpert
TM
9395 UPS (450–825 kVA) Installation and Operation Manual 164201725—Rev 10 www.eaton.com/powerquality
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.
1.2.10 Energy Saver System and High Alert Modes
As a subset of Online mode, the Energy Saver System (ESS) 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 ESS 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 ESS mode. If the High Alert command is
received during the time period, the timer will be restarted.
1.2.11 Harmonic Reduction System (HRS)
The Harmonic Reduction system mode of the 9395 UPS allows the UPS to actively reduce the input Total
Demand Distortion (TDD) and increase the input power factor while maintaining high efficiency operation in
ESS mode. The UPS uses one of its UPMs to perform this active harmonic cancellation.
HRS mode uses an extra set of sensors (CTs) on the output bus of the unit. These sensors measure the
harmonics created by loads attached to the UPS output and the system actively reduces these harmonics.
The system must be in ESS mode to activate HRS mode. In HRS mode, the inverter is ON, the rectifier is OFF
and the output contactor is CLOSED.
HRS is a normal operating mode, not an alarm condition. The NORMAL light appears on the front of the UPS.
1.2.12 Variable Module Management System and High Alert Modes
The Variable Module Management System (VMMS) mode 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
than 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.
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.
NOTE Total Demand Distortion as defined by IEEE 519-1992 is the total root-sum-square
harmonic current distortion, in percent, of the maximum demand load current (the
nameplate rating of a fully rated UPS).
NOTE The Variable Module Management System and Energy Saver System modes are
mutually exclusive.