Juniper PTX10008 - Page 167

How to Calculate the Number of Power Supplies Required for Your PTX10008 Configuration
Use this procedure to calculate the number of power supplies required by your router configuration. The
minimum power configuration for PTX10008 routers is three power supplies. However, using the calculated
minimum power configuration does not prevent the system from raising a power alarm. To ensure you do
not log power alarms, you must configure your router for n+1 power supplies.
To calculate the number of power supplies required for your minimum router configuration:
1. Determine the power available from the power supplies. Table 57 on page 169 shows the power available
for installed power supplies.
NOTE: DC systems are only supported in the redundant configuration.
Table 57: Total Power Available
With Five Power
Supplies
With Four Power
Supplies
With Three Power
Supplies
Power Supply Module
Models
13,500 W10,800 W8100 WJNP10K-PWR-AC
27,500 W22,000 W16,500 WJNP10K-PWR-AC2 dual
feed, high power (30-A)
setting
25,000 W20,000 W15,000 WJNP10K-PWR-AC2 single
feed, high power (20-A)
setting
12,500 W——JNP10K-PWR-DC
27,500 W——JNP10K-PWR-DC2 dual
feed, high power (80-A)
setting
22,000 W——JNP10K-PWR-DC2 dual
feed, low power (60-A)
setting
13,750 W——JNP10K-PWR-DC2 single
feed, high power (80-A)
setting
169