Figure 4: Power Distribution From Three-Phase Feed Wye Pdm To The Ac; Psms; Table 4: Ac Pdm Delta And Wye Current Requirements - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
8

Figure 4: Power Distribution from Three-Phase Feed Wye PDM to the AC

PSMs

AC PS_0
2800W
input
NE1
A1
B1
C1
The AC power subsystem is feed redundant, each PSM takes in two AC feeds and uses
one of the two. One AC feed is active at a time. If one feed fails, the PSM automatically
switches over to the other feed without disrupting system function, (see
Three-Phase Delta AC Power Distribution Module Description" on page
Three-Phase Wye AC Power Distribution Module Description" on page
AC Power Supply Module Description" on page
AC power requirements—Table 4 on page 8
for the three–phase delta and wye power feeds.

Table 4: AC PDM Delta and Wye Current Requirements

Three–Phase
Voltage Input Feed
200V 1
(minimum–nominal)
(line-to-line) for delta
2
(per phase)
200V 1
(minimum–nominal)
(line-to-neutral) for
2
wye (per phase)
NOTE: This is the minimum required to provide 2.5KW per PSM. Based on
facilities guidelines, you should over-provision the MX2020 router. The two
numbers listed in the current columns reflect the distribution of phases
from the feed to PSM. For example, from one feed each phase goes to two
PSMs and from other feed each phase goes to only one PSM.
AC PS_1 AC PS_4
2800W 2800W
input input
AC PS_3 AC PS_2 AC PS_5 AC PS_6
2800W 2800W 2800W 2800W
input input input
46).
shows the MX2020 current requirements
Current Delta per
Three-Phase PDM
50A
25A
–
–
AC PS_7
2800W
input
AC PS_8
2800W
input input
NE2
A2
B2
C2
"MX2020
42, "MX2020
44, and "MX2020
Current Wye per
Three-Phase PDM
–
–
30A
15A
Copyright © 2013, Juniper Networks, Inc.