Introduction1-8 Eaton ® Power Xpert® 9395P-300 (300kVA, 300kW) UPS Installation and Operation Manual P-164000563—Rev 04 www.eaton.com/powerquality1.4.9 Energy Saver and High Alert ModesAs a subset of Normal mode, Energy Saver mode maximizes efficiency by eliminating unnecessary powerconversion 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-conversionmode (inverter online) if a commercial electrical power brownout, blackout, overvoltage, undervoltage, orout-of-tolerance frequency condition occurs.In High Alert mode, the unit transfers from Energy Saver mode to double-conversion mode or if indouble-conversion mode remains in double-conversion mode for a default time period of one hour. High Alertmode allows the user to place the unit in double-conversion mode when outside conditions could cause apower disturbance. At the completion of the time period, the unit defaults back to Energy Saver mode. If theHigh Alert command is received during the time period, the timer will be restarted.1.4.10 Variable Module Management System and High Alert Modes.Variable Module Management (VMMS) maintains UPM redundancy and achieves higher efficiencies byintelligently controlling the UPM’s load level. The efficiency rating for each UPM is highest when loads aregreater than 50% of the system rating. Therefore, shifting the load to fewer UPMs can achieve higherefficiencies when the UPS load is lighter. In VMMS mode, the UPS is actively monitoring the critical bus andUPMs 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, andHigh 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 backto VMMS mode. If the high alert command is received during the one hour, the one hour timer will be restarted.1.4.11 Monitoring and CommunicationThe UPS system can be further enhanced by adding optional accessories such as a Remote EmergencyPower-off (REPO) control, RMP II, SCM II, RIM II, or X-Slot communication cards. See Chapter 5, “InstallingOptions and Accessories” for additional information. Basic System Configurations The following basic UPSsystem configurations are possible:l 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 locationwithin the facility.l Relay Interface Module II (RIM II) – An optional RIM II uses relay contact closures to indicate the UPSoperating status and alarm condition.l Supervisory Contact Module II (SCM II) – An optional SCM II establishes an interface between the UPSsystem equipment and the customer's monitor.l X-Slot Cards – Optional X-Slot cards support several protocols, such as SNMP, HTTP, IBM AS/400, andModbus.NOTE Energy Saver System mode requires the UPS to be factory built with a ContinuousStatic Switch (CSS).NOTE The Variable Module Management System and Energy Saver System modes aremutually exclusive.NOTE Variable Module Management System and Energy Saver modes are mutuallyexclusive.
