Installing A T640 Three-Phase Wye Ac Power Supply Cord; Figure 170: Disconnecting The Ac Power Cord From A Three-Phase Wye Ac Power; Supply - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
292
Disconnect the wires from the AC terminal block and grounding point on the
8.
three-phase wye AC power supply (Figure 170 on page 292), Use a 1/4-in. slotted
screwdriver to loosen each screw, and remove each wire from the grounding point or
input terminal.
Remove the wire labeled
a.
Remove the wire labeled
b.
Remove the wire labeled
c.
Remove the wire labeled
d.
Remove the wire labeled
e.
Figure 170: Disconnecting the AC Power Cord from a Three-Phase Wye
AC Power Supply
Loosen the plastic cable tie fastening the AC power cord to the power supply.
9.
Loosen and remove the retaining nut from the AC power cord.
10.
Pull the AC power cord out of the metal wiring compartment.
11.
Carefully move the AC power cable out of the way.
12.

Installing a T640 Three-Phase Wye AC Power Supply Cord

To install a three-phase wye AC power supply cord:
Make sure that the voltage across the AC power cord leads is 0 V and that there is no
1.
chance that the power cord might become active during installation.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Switch the power switch on the power supply faceplate to the standby position.
3.
Using a slotted screwdriver, loosen the two screws securing the door of the metal
4.
wiring compartment.
Open the door of the metal wiring compartment.
5.
Place the retaining screw into the metal wiring compartment.
6.
Unscrew the retaining nut from the AC power cord.
7.
Place the retaining nut inside the metal wiring compartment.
8.
N from the N input terminal
from the input terminal.
L3 L3
L2 from the L2 input terminal.
from the input terminal.
L1 L1
GND from the grounding point labeled
L1 L2 L3 N
Copyright © 2010, Juniper Networks, Inc.
GND .