Juniper MX2020 Hardware Guide

Figure 71: AC PDM Three-Phase Wye Input Power
g007086
AC PS_0
2800W
input
AC PS_3
2800W
input
AC PS_2
2800W
input
AC PS_5
2800W
input
A1
B1
C1
AC PS_1
2800W
input
AC PS_4
2800W
input
NE1
C2
NE2
AC PS_6
2800W
input
A2
B2
AC PS_7
2800W
input
AC PS_8
2800W
input
AC PSM VIN=200-240 single phase:
a. Two AC PSMs are connected in parallel between two lines and neutral.
b. Nominal value of input current for one AC PSM is 2800 W/200 V=14 A.
c. Nominal input current for two AC PSMs is 2*14 A=28 A.
d. Nominal value of line current is 28 A.
e. So, input #1 rated current is 28 A.
f. Only one AC PSM is connected between two lines and neutral.
g. Nominal value of input current for one AC PSM is 2800 W/200 V=14 A.
h. Nominal value of line current is 14 A.
i. Current rating for input #2 is 14 A.
5. Calculate thermal output (BTUs). Multiply the input power requirement (in watts) by 3.41 as shown in
Table 67 on page 190.
189

Juniper MX2020 Specifications

General

Brand	Juniper
Model	MX2020
Category	Network Router
Language	English