Liebert Power Supply Operation, 51% to 75% load 26% to 50% load To 25% load

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OPERATION

NORMAL MODE OPERATION

During normal operation, mains power provides energy to the UPS. The filters and the power conditioning circuit process this power to provide computer grade power to connected loads. The UPS maintains the batteries in a fully charged state.

The front panel displays the percentage of load on the UPS output. The figure below indicates approximately 51-75% loading.

BATTERY MODE OPERATION

Battery mode occurs in event of extreme input voltage condition or complete mains failure. The battery system along with the bi-directional converter generates power for the connected load.

During battery mode an alarm sounds every 10 seconds. This will change to 2 beeps every 5 seconds when battery runs low (approximately 2 minutes remaining). Each load/battery level indicator represents a 25% capacity level. As capacity decreases, fewer indicators remain illuminated. Mains LED will flash every second indicating the UPS is operating from battery mode.

Load/ Battery

Level Indicators

Utility High/Low Utility

76% to 100% load

(Flashes to indicate overload)

51% to 75% load

26% to 50% load

0% to 25% load

Battery mode supports a full rated load for approximately 5 minutes before it shuts down. To increase this time, turn off non essential pieces of equipment (such as idle computers and monitors).

WARNING: Turning off the UPS while in battery mode will result in loss of output power.

The figure below displays approximately 51-75% battery capacity remaining.

Alarm silence/Test

On/Off

MAINS HIGH/LOW MODE OPERATION

LED ON LED OFF

Load/ Battery

Level Indicators

76% to 100% load

51% to 75% load

26% to 50% load

0% to 25% load

(Flashes to indicate low battery)

If high or low voltage conditions occur, the PowerSure™ Interactive UPS will automatically correct the mains voltage by either lowering or raising the input voltage condition. The UPS will continue to correct these conditions indefinitely, without draining battery power.

The figure below indicates approximately 51-75% loading while automatically correcting the mains voltage.

Utility High/Low Utility

Alarm silence/Test

On/Off

(Flashes every second)

Load/ Battery

Level Indicators

Utility High/Low

Utility

Alarm silence/Test

On/Off

BATTERY RECHARGE MODE

The UPS resumes normal operation once mains power is restored, whether the UPS is ON or OFF. At this time, the bi-directional converter begins recharging the battery.

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Contents Important Safety Instructions Introduction & System Description Glossary of SymbolsAutomatic Voltage MINI-TOWER InstallationEMI/RFI Filters Regulator Battery Bi-Directional Converter Major ComponentsRackmount Installation Load/Battery Level Indicators ALL Green Controls and IndicatorsRackmount Powersure Interactive MINI-TOWER Powersure Interactive51% to 75% load 26% to 50% load To 25% load Alarm silence/Test On/OffUtility High/Low Utility Alarm silence/Test On/Off OperationUPS Intelligent Communications MaintenanceCommunications Interface Port UPS MonitoringVA Model MINI-TOWER Battery ReplacementRackmount Battery Replacement Problem Cause Solution TroubleshootingTroubleshooting Guide Indicator a indicatorTwo minutes of run time remaining Powersure Interactive Typical Battery Discharge CurvesFuse Replacement Procedures for 700 VA Discharge times are at 25 C ambientAgency MINI-TOWER SpecificationsRackmount Specifications EnvironmentalLife Support Policy Limited Warranty