Calculating System Thermal Output; Understanding Normal-Capacity Power System Power Zones - Juniper PTX5000 Hardware Manual

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Output power in watts / power supply efficiency = power consumption in watts

11898 W / 0.9 = 13,220 W

Calculating System Thermal Output

After you have calculated the power consumption for your configuration, you can use that information

to determine the system thermal output (BTUs per hour). To do so, multiply the power consumption in

watts by 3.41.

For example, above we calculated the power consumption for a redundant base configuration with eight

FPC3-PTX-U3 FPCs and sixteen P3-15-U-QSFP28 PICs at 40° C (104° F) ambient temperature to be

13,220 W. Using that information we can calculate the system thermal output for the configuration:

Power consumption in watts * 3.41 = system thermal output in BTU/hr

13220 W * 3.41 = 45080.2 BTU/hr

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PSM Slots | 183

Normal-Capacity Power Zones and PSM Fault Tolerance | 183

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