Removing A Ptx5000 High Capacity Dc Pdu - Juniper PTX5000 Hardware Manual

Removing a PTX5000 High Capacity DC PDU

The PTX5000 has two redundant, load-sharing PDUs. Each PDU is hot-insertable and hot-removable.
The High Capacity DC PDU weighs 64.5 lb (29.3 kg) without PSMs.
To remove a High Capacity DC PDU:
1. Switch off the customer-site circuit breakers to the PDU being removed.
2. Move the power switch to the standby
(
) position.
NOTE: After powering off a PDU, you must wait at least 60 seconds before turning it back
on.
3. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no
chance that the cables might become active during the removal process.
4. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
5. In the front of the chassis, remove the PSMs that are installed in he PDU you plan to replace. See
"Replacing a PTX5000 High Capacity DC PSM" on page 447
6. Remove the power cables from the power terminal block.
CAUTION: Before removing the power input cables, verify that power is turned off.
You can take the help of a licensed electrician to remove the cable lugs and the DC
power input cables connected to the PDU.
7. Loosen the four captive screws attaching the PDU handle to the PDU and chassis.
for details.
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