Compaq Presario 3000 Series - Manual (Page 54)

4-8 Compaq 3000 Series UPS Operation and Reference Guide
Time
V
oltage
Operating Range
Nominal
Utility Voltage
Upper Limit
Lower Limit
Figure 4-4. Optimal—Utility voltage fluctuating within the UPS operating
range
Operating Range
Utility Voltage
+ 20%
- 20%
Time
V
oltage
Nominal
Figure 4-5. Utility voltage fluctuation indicating a shift in nominal voltage
range may be necessary