Figure 164: Removing The 60-A Input Power Tray - Juniper PTX5000 Hardware Manual

PTX5000 Packet Transport Router Hardware Guide
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To remove a 60-A DC PDU:
Switch off the customer-site circuit breakers to the PDU being removed.
1.
Move the power switch on the PDU to the off (
2. OUTPUT
Make sure that the voltage across the DC power source cable leads is 0 V and that
3.
there is no chance that the cables might become active during the removal process.
Verify that the
–48 V 120 A
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
4.
the strap to one of the ESD points on the chassis at the front of the chassis.
Remove the PSMs in the front of the chassis from the PDU being removed
5.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
6.
the strap to one of the ESD points on the chassis at the back of the packet transport
router.
Switch all input power switches on the PDU faceplate to the off (
7.
NOTE: After powering off a PDU, you must wait at least 60 seconds before
turning it back on.
Loosen the captive screws that secure the input power trays to the PDU.
8.
Remove each input power tray from the PDU.
9.

Figure 164: Removing the 60-A Input Power Tray

NOTE: It is not necessary to remove the power cables from the input power
trays when you are replacing the PDU.
Loosen the four captive screws attaching the PDU handle to the PDU and chassis.
10.
LEDs on the PDU faceplate are off.
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