Connect Power To The Ptx5000 High Capacity Dc Pdus - Juniper PTX5000 Quick Start Manual

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Connect Power to the PTX5000 High Capacity DC PDUs

To connect the DC source power cables to the High Capacity DC inputs:

1. Verify that a properly rated customer-site circuit breaker for each DC power cable has been installed.

See PTX5000 DC Power Electrical Safety Guidelines in the

Guide

for more information.

2. Switch off the customer-site circuit breakers. Ensure that the voltage across the DC power source cable

leads is 0 V and that there is no chance that the cable leads might become active during installation.

3. Verify that a licensed electrician has attached appropriate cable lugs to the DC power cables. See

PTX5000 DC Power Cable and Lugs Specifications in the

Guide

for more information.

4. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on

the chassis.

5. Move the power switch to the standby ( ) position.

6. Unfasten the screw using a number 2 Phillips (+) screwdriver and remove the terminal block safety

cover.

7. Remove the nuts from the DC power terminal studs.

8. Connect the positive (+) DC source power cable to the RTN input terminal (see

Using a 7/16-in. (11-mm) nut driver, tighten the nut to secure the cable lug to the input terminal (see

Figure 35 on page

43).

The terminal studs for each PSM are numbered on the faceplate. For example, the DC input terminals

for PSM0 are PSM0_1 and PSM0_2, in the first and second rows of the terminal blocks. There are

sixteen 60-A input terminals for the eight PSMs supported for each PDU.

CAUTION:

Applying excessive torque damages the terminal studs and power supply. The maximum

torque that may be applied to this nut is 65 lb-in. (7.3 Nm).

You must use an appropriate torque-controlled tool to tighten the nuts.

PTX5000 Packet Transport Router Hardware

Figure 34 on page

43).

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