Appendix C
System Sizing
Copyright © 2008 Eaton Corporation. All Rights Reserved.
IPN 997-00012-56C September 2008
63
Appendix C
System Sizing
System and Rectifier Selection
Follow these steps to select the correct system model, rectifier type and number of rectifiers
for your application:
1 What is the nominal ac supply voltage (120V or 208-240V)?
2 What is the total power requirement of the equipment to be connected to the
EPS2/EPS5?
• Add up the power ratings of all equipment that will be powered from the
EPS2/EPS5. Look at the rating labels on the back of the routers, servers and other
equipment. Or refer to the equipment manufacturer's specifications. The power is
given in watts (W).
• If you plan to add more equipment later then you may want to size the EPS2/EPS5
so that it can also supply this future requirement.
• Up to 10 dc circuits can be connected to each EPS2/EPS5.
3 Select the EPS2/EPS5 system and rectifier type to suit your needs.
• Use one of the selection charts below to select the correct system and rectifier type.
• The number of rectifier modules shown in the charts includes one redundant
rectifier. This is an additional (hot-spare) rectifier for added security.
Supply Voltage: 120V ac
Connectable Equipment Power (W): 550 1100 1100 1650 2200
System model: EPS2 EPS2 EPS5 EPS5 EPS5
Rectifier type: EPR48-3G APR48-3G EPR48-3G EPR48-3G EPR48-3G
Number of rectifiers: 2 2 3 4 5
Supply Voltage: 208-240V ac
Connectable Equipment Power (W): 900 1800 1800 2700 3600
System model: EPS2 EPS2 EPS5 EPS5 EPS5
Rectifier type: EPR48-3G APR48-3G EPR48-3G EPR48-3G EPR48-3G
Number of rectifiers: 2 2 3 4 5
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