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Introduction
3
Powerware
®
9 Prestige SeriesUser’s Guide(4500/6000 VA) Rev H www.powerware.com
3. Add all of the resultant VA ratings together to obtain the total
load requirements of the equipment to be protected (see
Figure 2). If the load consists of the power-factor corrected
supplies, it is recommended to use total watts for the load
requirements.
3 COMPUTERS 3 MONITORS EXTERNAL
MODEM
3 x 300 WATTS X 1.4 = 1260 VA 3x2AMPSx240V = 1440 VA 50 VA
1260 VA + 1440 VA + 50 VA = 2750 VA (Total Load Requirements)
300 WATTS
EACH
2AMPS
EACH 50 VA
Figure 2. Volt-Amperes Calculation Example
If the total load requirements of the equipment exceeds the capacity of
the UPS, you must either reduce the number of pieces of equipment, or
use a UPS with a larger load capacity.
When deciding on which pieces of equipment to remove from the UPS,
select equipment that has a lower priority for power protection.
Computers, monitors, and modems typically have a higher priority
because they could be processing or transmitting data when a power
outage occurs.
Battery Times for the Prestige 6000
During a power failure, the UPS battery supplies power to your
equipment, providing time to complete computing activities prior to
UPS shutdown. The duration of this time period is directly related to the
UPS battery configuration. By adding battery cabinets, you can
customize the UPS to provide enough battery time for normal
processing activities.
Load
(
VA
)
L
o
a
d
(
W
)
Average BatteryTime (in Minutes)
L
o
a
d
(
V
A
)
at 0.67 PF*
Load (W)
2 Cabinets 3 Cabinets 4 Cabinets 5 Cabinets 6 Cabinets
6000 4000 5 9 14 21 25
4500 3000 7 14 22 27 32
3000 2000 14 24 32 39 47
1500 1000 30 44 58 72 87
*
**
*Typical Power Factor (PF)