Replacing A T640 Three-Phase Wye Ac Power Supply; Removing A T640 Three-Phase Wye Ac Power Supply; Figure 224: Three-Phase Wye Ac Power Supply - Juniper T640 Hardware Manual

Replacing a T640 Three-Phase Wye AC Power Supply

Copyright © 2013, Juniper Networks, Inc.
T640 Preventing Electrostatic Discharge Damage on page 386
T640 AC Power Cord Specifications on page 439
Removing a T640 Three-Phase Wye AC Power Supply on page 365
1.
Installing a T640 Three-Phase Wye AC Power Supply on page 367
2.

Removing a T640 Three-Phase Wye AC Power Supply

To remove a three-phase wye AC power supply:
Switch off the customer site circuit breakers to the power supply being removed. Make
1.
sure that the voltage across the AC power source cord is 0 V and that there is no
chance that the power cord might become active during the removal process.
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.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
Remove the ESD grounding strap from the ESD point on the chassis, and attach it to
4.
an approved site ESD grounding point. See the instructions for your site.
Disconnect the AC power cord (see
5.

Figure 224: Three-Phase Wye AC Power Supply

Remove the ESD grounding strap from the approved site ESD grounding point. See
6.
the instructions for your site. Reconnect the strap to one of the ESD points on the
chassis.
Chapter 17: Replacing T640 Router Hardware Components
Figure 224 on page 365) from the power source.
365