Specifications

20 Optimizing IBM Netfinity Servers for SAP R/3 and Windows NT
• APC Smart-UPS 3000 SU3000RMB, 3000 volt ampere/2250 watt,rack-model,
part #94G6676 (120 VAC)
• APC Smart-UPS 3000 SU3000RMiB, 3000 volt ampere/2250 watt,
rack-model, part #94G6677 (220-240 VAC)
2.2.2 UPS Sizing
UPS sizing calculates the sort of UPS you will need for your specifications. You
have to determine two factors to size your UPS:
1. The total load protected by the UPS in volt-amps
2. The needed on-battery run time
Use the following checklist to determine the total load:
1. Make a list of all equipment that requires protecting.
Don't forget external devices, such as monitors, disk subsystems, network
components and console switches.
2. Determine the load of each component.
If you want to compare the total system load to the maximum UPS load you
must determine your load in volt-amps. Obtain the load figures from either the
labeling on the components or the accompanying system literature. For
indications in watts, multiply the specified figure by 1.4 and for indications in
amps, multiply the figure by your country-specific line voltage (110 volts or
220-240 volts).
3. Determine total requirements
Add all volt-amps of each component together. This total will give you the total
amount of volt-amps you need.
4. Size your UPS
Use Table 2 to size your APC UPS. If you use a UPS from another
manufacturer, consult its specification list. Most manufacturers have tables
available, where you can determine the size of the UPS in function of needed
volt-amps and run time.
Table 2. On-Battery Run Time in Minutes
VA LOAD SU700NET SU1000NET SU1400 NET SU1400RMB SU3000RMB
20038589069135
25026447154113
3002036574496
3501728473684
4001424393074
450 121 20 33 25 65
500 9 18 29 22 58
600 6 13 21 16 47
700 5 11 18 12 38
Note: Your needed on-battery run time depends on the time for your shutdown procedure.