Specifications

Configuration
4-9
Compaq Confidential – Need to Know Required
Writer: Melinda Hill Puglisi Project: Compaq 3000 Series UPS Operation and Reference Guide Comments:
Part Number: 341251-002 File Name: e-ch4 Configuration.doc Last Saved On: 8/26/99 3:13 PM
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.
■
If the utility voltage frequently varies outside the UPS operating range
(see Fig 4-6), consider changing from normal to extended range
(+20% to –35%). This provides more tolerance to brief utility voltage
fluctuations.
To update the nominal voltage and operating range parameters:
1. Have a qualified electrician monitor utility voltage.
2. Use the following tables to identify the operating range that most closely
matches requirements: