Juniper MX2020 Hardware Manual page 209

To calculate the AC power requirements:
1. Calculate the power (usage) using the values, (see
2. Evaluate the power budget, including the budget for each configuration if applicable, and check the
required power against the maximum output power of available PDM options.
Table 66 on page 187
power per PSM, and power efficiency.
Table 66: Calculating AC Power Budget
Power Distribution
Module
Three-phase delta
AC PDM (4 per
system)—50 A feed
(input #1), and 25 A
feed (input #2)
Three-phase wye AC
PDM (4 per
system)—30 A feed
(input #1), and 15 A
feed (input #2)
3. To calculate necessary input power for three-phase delta AC PDM, follow the procedure below (see
Figure 70 on page 188).
lists the three-phase delta and wye feed requirements, maximum input and output
Typical Input Maximum Input
Power per PSM Power per PSM
2142 W 2800 W
2142 W 2800 W
"MX2020 AC Power Requirements" on page
Maximum
Output Power
per PSM
2500 W
2500 W
167).
Power Supply
Module Efficiency
91%
91%
187