Juniper MX960 Hardware Manual page 258

Table 103: Calculating Power Budget
Maximum Output
Power of Power
Power Supply Supply
MX960 AC 1700 W
normal-capacity
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)
1
For this configuration, output power is 2935 W.
2
For this configuration, output power is 3225 W.
3. Calculate input power. In this step, the input power requirements for the example configuration are
calculated. To do this, divide the total output requirement by the efficiency of the power supply as
shown in Table 94 on page
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.
Table 104: Calculating Input Power
Power Supply
MX960 AC high-capacity
MX960 DC high-capacity
Maximum
Output Power
for System
5100 W
3400 W (one feed)
8200 W (two
feeds)
5600 W
3400 W (one feed)
8200 W (two
feeds)
219.
Power Supply Efficiency
~88 %
86 %
Zone 0
Nonzoned
Unused
Unused
1
Power
Power
Power –
exceeded
(non-zoned;
5100 W - 6160
= power
exceeded)
– Power
exceeded
1165 W
– Power
exceeded
– Power
exceeded
1165 W
1
Input Power Requirement
3
3335 W
3
3413 W
240
Zone 1
Unused
2
Power
–
Power
exceeded
875 W
Power
exceeded
Power
exceeded
875 W
2