Powerware 5140 - Manual (Page 54)

Configuration
46 Powerware ® 5140 User’s Guide
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Nominal Input Voltage
If the utility power consistently fluctuates outside of the configured
UPS voltage range, the UPS repeatedly corrects the input voltage by
switching to battery power.
You can configure the UPS to more closely match the nominal input
voltage by selecting a different input voltage or extending the input
voltage range. The default is auto-sensing to 208/230V.
1. Have a qualified electrician measure the utility voltage.
2. Use the System Setup Menu to access the Set Voltage parameter
(see page 42).
3. Select one of the following options: 200V, 208V, 220V, 230V,
240V, 208/230V auto-sensing, or 230V extended. Use the
following table to help select the appropriate voltage.
Nominal Input
Voltage (Vac)
Normal Input
Voltage Range
Extended Input
Voltage Range
200V Nominal +20%/–17% 166-240V
208V Nominal ±20% 166-248V
220V Nominal ±20% 176-264V
230V Nominal ±20% 184-276V 166-288V
240V Nominal ±20% 192-288V
4. Update the nominal input voltage range and/or the extended
utility voltage range parameters as required.