UPS Operation

Operating Modes

After you install and apply power to the UPS, the UPS filters and regulates incoming AC power, eliminating noise and voltage spikes, and provides consistent power to your equipment (see Figure 19). While power is applied to the UPS, the maintenance-free battery is automatically kept in a fully-charged condition.

 

 

 

Bypass Line

 

 

Utility

 

 

 

 

Receptacle

Power

Surge

 

 

Output

 

Suppression

Rectifier

Inverter

EMI/RFI

or

 

EMI/RFI

 

 

Filters

Terminal

 

Filters

 

 

 

Block

 

 

 

 

 

 

 

 

 

Emergency

Receptacle

 

 

 

 

or

 

 

Battery Cabinets

 

Power-Off

Terminal

 

 

 

 

 

Block

Battery

Charger

BatteryBattery

Figure 19. UPS Block Diagram

Normal Mode

During Normal mode, the µindicator illuminates and the front panel displays the percentage of UPS load capacity being used by the protected equipment (see Figure 20).

OVERLOAD

SITE FAULT

OVERTEMP

BATTERY

SELF TEST

LOAD ON

LOAD ON

LOAD ON

LOAD ON

LOAD OFF

APPROX.

APPROX.

APPROX.

APPROX.

NORMAL

81-100%

61-80%

41-60%

0-40%

UTILITY

LOAD

LOAD

LOAD

LOAD

 

Figure 20. Normal Operation Indicators

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Powerware® 9 Prestige Series User’s Guide (4500/6000 VA) S Rev H www.powerware.com