Table 80: Calculating Input Power - Juniper MX960 Hardware Manual

MX960 3D Universal Edge Router Hardware Guide
Table 79: Calculating Power Budget (continued)
Maximum Output
Power of Power
Power Supply Supply
MX960 AC 1700 W (one feed)
high-capacity
4100 W (two feeds)
MX960 DC 2800 W
normal-capacity
MX960 DC 1700 W (one feed)
high-capacity
4100 W (two feeds)

Table 80: Calculating Input Power

Power Supply
MX960 AC high-capacity
MX960 DC high-capacity
164
Maximum Output
Power for System
3400 W (one feed)
8200 W (two feeds)
5600 W
3400 W (one feed)
8200 W (two feeds)
1
For this configuration, output power is 2935 W.
2
For this configuration, output power is 3225 W.
Calculate input power. In this step, the input power requirements for the example
3.
configuration are calculated. To do this, divide the total output requirement by the
efficiency of the power supply as shown in
NOTE: MX960 AC and MX960 DC normal-capacity power supplies are
not included in the following table, because their power budget was
exceeded in the sample configuration.
Power Supply Efficiency
~88 %
86 %
1
These values are at full load and nominal voltage.
2
For this configuration, total power for zone 0 is 2935 W. The calculation method for
zone 1 is the same as zone 0.
3
Zone 0 requirement.
Calculate thermal output (BTUs). To calculate this, multiply the input power
4.
requirement (in watts) by 3.41 as shown in
Zone 0 Unused
Nonzoned
1
Power
Unused Power
– Power exceeded
1165 W
– Power exceeded
– Power exceeded
1165 W
Table 80 on page
1
Input Power Requirement
3
3335 W
3
3413 W
Table 81 on page 165.
Copyright © 2017, Juniper Networks, Inc.
Zone 1 Unused
2
Power
Power exceeded
875 W
Power exceeded
Power exceeded
875 W
164.
2