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4-8 Compaq 2000 Series UPS Operation and Reference Guide
Figure 4-4. Optimal—Utility voltage fluctuating within the UPS operating
range
Operating Range
Utility Voltage
+ 20%
- 20%
Time
Voltage
Nominal
Figure 4-5. Utility voltage fluctuation indicating a shift in nominal voltage
range may be necessary
Operating Range
Utility Voltage
+20%
- 20%
-35%
Time
Voltage
Nominal
Extended
Range
Figure 4-6. Utility voltage fluctuation indicating a possible need for
extended range setting
To match the utility voltage, the UPS operating range can be modified in two
ways:
■ If the utility voltage differs from the currently configured nominal
voltage, but stays within a ±20% band (see Fig 4-5), consider shifting
the nominal voltage parameter selection to match the measured utility
voltage range.