Eaton Power Xpert 9395 550/275 Installation And Operation Manual Download

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Introduction

1-6

Power Xpert

9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716—Rev 8

www.eaton.com/powerquality

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.

1.2.13 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.

Remote Monitor Panel II (RMP II)

– An optional RMP II contains backlit status indicators and a local horn,

allowing monitoring of the operational status and alarm condition of the UPS from virtually any location
within the facility.

Relay Interface Module II (RIM II)

– An optional RIM II uses relay contact closures to indicate the UPS

operating status and alarm condition.

Supervisory Contact Module II (SCM II)

– An optional SCM II establishes an interface between the UPS

system equipment and the customer's monitor.

X-Slot Cards

– Optional X-Slot cards support several protocols, such as SNMP, HTTP, IBM

AS/400

, and

Modbus

eNotify Remote Monitoring and Diagnostics Service

– An optional service that provides 24/7 remote

monitoring of 43 alarms, temperature/humidity and battery charge information, daily heartbeat check, and
monthly report. The service also provides customer notification of significant alarms, remote diagnostics,
and dispatch of technicians. A PXGX connectivity card is required in an X-Slot communication bay. An
optional Powerware Environmental Monitoring Probe (EMP) is required for temperature/humidity
monitoring.

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.