Juniper MX2010 Hardware Manual page 588

NOTE: After powering off a PDM, wait at least 60 seconds before turning the circuit breaker
to the ON position.
To remove a three-phase delta AC PDM:
1. Make sure that the voltage across the AC power source cord is 0 V and that there is no chance that
the cord might become active during the removal process.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
an approved site ESD grounding point. See instructions for your site.
3. Disconnect the AC power cord (see
Figure 298: Three-Phase Delta AC Power Cord
4. 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 chassis.
5. Using a number 2 Phillips (+) screwdriver, loosen the four screws on the cover of the metal wiring
compartment that protects the AC terminal block.
6. Remove the cover of the metal AC wiring compartment.
7. Disconnect the wires from the AC terminal block on the three-phase delta AC PDM (see
Figure 299 on page 573), loosen each of the input terminals or grounding point screws, and remove
each wire form the grounding point or input terminal.
Figure 298 on page 572) from the power source.
572