Figure 16: Power Distribution From Three-Phase Feed Wye Pdm To The Ac - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
30
and three-phase wye. The AC power going to the PSMs is split into three individual
phases—each PSM works on a single phase. This means the power system works
independent of the kind of AC feed is connected. The user can connect one or two
feeds, depending on the power system configuration (number of PSMs, redundancy,
etc.). Each phase from each of the two feeds is distributed among one or two PSMs
(one feed has each phase going to two PSMs, and the other feed has each phase going
to a single PSM). See Figure 7 on page 14
Figure 15: Power Distribution from Three-Phase Feed Delta PDM to the
AC PSMs
AC PS_0 AC PS_3
2800W 2800W
input
A1
B1
C1

Figure 16: 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
and Figure 8 on page
AC PS_1 AC PS_4
2800W 2800W
input input input
AC PS_2
2800W
input
AC PS_5
2800W
input
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
input input input
158).
14.
AC PS_6 AC PS_7
2800W 2800W
input input
AC PS_8
2800W
input
AC PS_7
2800W
input
AC PS_8
2800W 2800W
input input
"MX2020
86, "MX2020
88, and
Copyright © 2015, Juniper Networks, Inc.
A2
B2
C2
NE2
A2
B2
C2
"MX2020