Juniper PTX5000 Hardware Manual page 199

• PTX5000 AC and DC high capacity PSM efficiency is approximately 90% at full load and nominal
voltage.
The examples below show the power requirement calculations for different types of configurations:
NOTE: All the examples below use RE-PTX-X8-64G Routing Engines, CB2-PTX Control Boards,
FAN3-PTX-H horizontal fan trays, and SIB3-PTX5K SIBs.
• This example shows the calculation for a non-redundant base configuration with no FPCs or PICs at
25° C (77° F) ambient temperature:
1 host subsystem + 1 vertical fan tray + 2 horizontal fan trays + SIBs = output power in watts
182 W + 80 W + 2(330 W) + 1170 W = 2092 W
Output power in watts / power supply efficiency = power consumption in watts
2092 W / 0.9 = 2324.4 W
• This example shows the calculation for a redundant base configuration with four FPC3-PTX-U3 FPCs
and eight P3-15-U-QSFP28 PICs at 25° C (77° F) ambient temperature:
2 host subsystems + 1 vertical fan tray + 2 horizontal fan trays + SIBs + 4 FPC3-PTX-U3 FPCs
+ 8 P3-15-U-QSFP28 PICs = output power in watts
2(182 W) + 80 W + 2(330 W) + 1170 W + 4(754 W) + 8(119 W) = 6242 W
Output power in watts / power supply efficiency = power consumption in watts
6242 W / 0.9 = 6935.6 W
• This example shows the calculation 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:
2 host subsystems + 1 vertical fan tray + 2 horizontal fan trays + SIBs + 8 FPC3-PTX-U3 FPCs
+ 16 P3-15-U-QSFP28 PICs = output power in watts
2(187 W) + 370 W + 2(900 W) + 1170 W + 8(777 W) + 16(123 W) = 11898 W
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