Installing A T640 Three-Phase Wye Ac Power Supply Cord; Figure 230: Disconnecting The Ac Power Cord From A Three-Phase Wye Ac; Power Supply - Juniper T640 Hardware Manual

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Disconnect the wires from the AC terminal block and grounding point on the
8.
three-phase wye AC power supply
remove each wire from the grounding point or input terminal.
NOTE: The terminal connections have either slotted screws or hex screws.
Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in
(4-mm) Allen wrench for the 5/16-in hex screws.
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 230: 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.
Chapter 17: Replacing T640 Router Hardware Components
(Figure 230 on page
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
371), loosen each screw, and
GND .
371