Installing The T640 Three-Phase Wye Ac Power Supplies; Figure 213: Connecting Power To A Three-Phase Delta Ac Power Supply - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
352
NOTE: After a power supply is powered on, it can take up to 60 seconds
for status indicators—such as the LEDs on the power supply, the command
output displays, and messages on the LED display on the craft interface—to
indicate that the power supply is functioning normally. Ignore error
indicators that appear during the first 60 seconds.
Repeat the procedure for the other power supply.
24.

Figure 213: Connecting Power to a Three-Phase Delta AC Power Supply

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Installing the T640 Three-Phase Wye AC Power Supplies

Each three-phase AC power supply weighs approximately 31.0 lb (14.06 kg). To install
a three-phase wye 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.
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