Figure 222: Installing A Three-Phase Wye Ac Power Supply - Juniper T640 Hardware Manual

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Connect the AC power cord to the AC power source.

Switch on the customer site circuit breakers to provide voltage to the AC power source

Remove the ESD grounding strap from the approved site ESD grounding point. See

the instructions for your site. Reconnect the strap to one of the ESD points on the

Verify that the

LED on the power supply faceplate is lit steadily, indicating that

the AC terminal block is receiving power.

Switch the power switch on the power supply to the

Verify that the

LED on the power supply faceplate is lit steadily, indicating that

the power supply is correctly installed and is functioning properly. The

blinks momentarily, then lights steadily.

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.

Figure 222: Installing a Three-Phase Wye AC Power Supply

T640 Three-Phase Delta and Wye AC Power Supply Description on page 106

T640 Three-Phase Delta and Wye AC Power Supply LEDs on page 109

Chapter 29: Replacing Power System Components

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