Table 84: Calculating Power Budget For A Mx480 Ac Chassis; Table 85: Calculating Power Budget For A Mx480 Dc Chassis; Table 86: Calculating Input Power Examples - Juniper MX480 Hardware Manual

Table 84: Calculating Power Budget for a MX480 AC Chassis

Power Supply
MX480 AC Normal-capacity (low-line)
MX480 AC Normal-capacity (high-line)
MX480 AC High-capacity (low-line)
MX480 AC High-capacity (high-line)

Table 85: Calculating Power Budget for a MX480 DC Chassis

Power Supply
MX480 DC Normal-capacity
MX480 DC High-capacity (DIP=0)
NOTE: The DIP switch position is expected input current;
the correct feeds must be present to obtain the desired
output power.
MX480 DC High-capacity (DIP=1)
NOTE: The DIP switch position is expected input current;
the correct feeds must be present to obtain the desired
output power.

Table 86: Calculating Input Power Examples

Power Supply
MX480 AC Normal-capacity (high-line)
MX480 AC High-capacity (high-line)
MX480 DC Normal-capacity
MX480 DC High-capacity
Copyright © 2019, Juniper Networks, Inc.
1
For this configuration, output power excluding the cooling system is 1360 W.
1
For this configuration, output power excluding the cooling system is 1010 W.
2
For this configuration, output power excluding the cooling system is 770 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
Chapter 2: Site Planning, Preparation, and Specifications
Maximum System Output Power
3081 W
3200 W
3501 W
4100 W
Zone 0 Unused
Maximum System
Power
Output Power
3200 W 2190 W
4800 W 3790 W
5200 W 4190W
Table 86 on page
1
Power Supply Efficiency
85 %
89 %
~98 %
~98 %
1
Unused Power
2071 W
2190 W
2491 W
3090 W
Zone 1 Unused
1 2
Power
2430 W
4030 W
4430W
161.
2
Input Power Requirement
1282 W
1225 W
3
1112 W
3
1112 W
161