Compaq 3000 Series manual Configuration

Configuration 4-9

Nominal

Voltage

Operating Range

Utility Voltage

Time

+20%

Extended

-20% Range -35%

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: