Calculating Power Requirements For The Srx5800 Services Gateway - Juniper SRX5800 Hardware Manual

Calculating Power Requirements for the SRX5800 Services Gateway

Copyright © 2015, Juniper Networks, Inc.
The information in this topic helps you determine which power supplies are suitable for
various configurations, as well as which power supplies are not suitable because output
power is exceeded. You determine suitability by subtracting the total power draw from
the maximum output of the power supplies. Afterward, the required input current is
calculated. Finally, you calculate the thermal output.
We recommend that you provision power according to the maximum input current listed
in the power supply electrical specifications (see
Supply Specifications" on page 131
Specifications" on page 135).
Use the following procedures to calculate the power requirement:
Calculate the power requirement.
1.
Evaluate the power budget.
2.
Calculate input power.
3.
Calculate thermal output (BTUs) for cooling requirements.
4.
Chapter 7: Planning and Preparing the Site
"SRX5800 Services Gateway AC Power
and "SRX5800 Services Gateway DC Power Supply
107