Installing The T640 Three-Phase Delta Ac Power Supplies; Figure 212: Disconnecting Power Cables From The Four-Input 240-A Dc Power; Supply - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
350
Figure 212: Disconnecting Power Cables from the Four-Input 240-A DC
Power Supply
Cable lug
Locking
washer
Nut

Installing the T640 Three-Phase Delta AC Power Supplies

Each three-phase AC power supply weighs approximately 31.0 lb (14.06 kg). To install
a three-phase delta AC power supply:
Make sure that the voltage across the AC power source cord leads is 0 V and that
1.
there is no chance that the 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 both hands, slide the power supply into the chassis until you feel resistance.
4.
Twist the ejector handles at the upper corners of the power supply faceplate clockwise
5.
until they stop.
Tighten the captive screws at the lower corners of the power supply faceplate to
6.
secure the power supply in the chassis.
Using a number 2 Phillips (+) screwdriver, loosen the two screws on the door of the
7.
metal wiring compartment that protects the AC terminal block.
Open the door of the metal wiring compartment.
8.
Unscrew the retaining nut from the AC power cord.
9.
Terminal studs
Copyright © 2013, Juniper Networks, Inc.