Replacing a T1600 Three-Phase Delta AC Power Supply

The T1600 router has either one nonredundant power supply or two redundant, load-sharing power supplies. Each redundant power supply is hot-insertable and hot-removable. When a redundant power supply is powered down or removed, the other power supply automatically assumes the entire electrical load for the router. If you have only one power supply, you must power off the system before removing the power supply.

1. Removing a T1600 Three-Phase Delta AC Power Supply
2. Installing a T1600 Three-Phase Delta AC Power Supply

Removing a T1600 Three-Phase Delta AC Power Supply

1. Switch off the customer site circuit breakers to the power supply being removed. 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 one of the ESD points on the chassis.
3. Switch the power switch on the power supply faceplate to the standby position.

   Note: After powering off a power supply, wait at least 60 seconds before turning it back on.

4. Remove the ESD grounding strap from the ESD point on the chassis, and attach it to an approved site ESD grounding point. See the instructions for your site.
5. Disconnect the AC power cord (see Figure 1) from the power source.

   Figure 1: Three-Phase Delta AC Power Supply

   
6. 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.
7. Using a number 2 Phillips (+) screwdriver, loosen the two screws on the door of the metal wiring compartment that protects the AC terminal block.
8. Open the door of the metal wiring compartment.

9. Disconnect the wires from the AC terminal block on the three-phase delta AC power supply (Figure 2), Loosen each of the input terminals or grounding point screws, and remove each wire from the grounding point or input terminal.

   Note: The terminal connections have either slotted screws or hex screws. Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in (4-mm) Allen wrench for the 5/16-in hex screws.

   1. Remove the wire labeled L3 from the L3 input terminal.
   2. Remove the wire labeled L2 from the L2 input terminal.
   3. Remove the wire labeled L1 from the L1 input terminal.
   4. Remove the wire labeled GND from the grounding point labeled GND.

   Figure 2: Disconnecting the Power Cord from a Three-Phase Delta AC Power Supply

   
10. Loosen the plastic cable tie fastening the AC power cord to the power supply.
11. Loosen and remove the retaining nut from the AC power cord.
12. Pull the AC power cord out of the metal wiring compartment.
13. Carefully move the AC power cable out of the way.
14. Disconnect the AC power cord from the AC power supply.
15. Loosen the captive screws on the lower corners of the power supply faceplate completely.
16. Twist the ejector handles on the upper corners of the faceplate counterclockwise to unseat the power supply.
17. Grasp the handle on the power supply faceplate and pull firmly. Slide it halfway out of the chassis (see Figure 3).

    Caution: Each three-phase delta AC power supply weighs approximately 31.0 lb. (14.06 kg). Be prepared to support the full weight of the power supply as you remove it from the router.

18. Place one hand underneath the power supply to support it and slide it completely out of the chassis.

    Figure 3: Removing a Three-Phase Delta AC Power Supply

    

    Warning: Do not touch the power connectors on the rear of the power supply (see Figure 4). They can contain dangerous voltages.

    Figure 4: Rear of the Power Supply Showing Midplane Connectors

    

Installing a T1600 Three-Phase Delta AC Power Supply

1. Make sure that the voltage across the AC power source cord leads is 0 V and that there is no chance that the cord might become active during installation.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
3. Switch the power switch on the power supply faceplate to the standby position.
4. Using both hands, slide the power supply into the chassis until you feel resistance (see Figure 6).
5. Twist the ejector handles at the upper corners of the power supply faceplate clockwise until they stop.
6. Tighten the captive screws at the lower corners of the power supply faceplate to secure the power supply in the chassis.
7. Using a number 2 Phillips (+) screwdriver, loosen the two screws on the door of the metal wiring compartment that protects the AC terminal block.
8. Open the door of the metal wiring compartment.
9. Unscrew the retaining nut from the AC power cord.
10. Place the retaining nut inside the metal wiring compartment.
11. Put the wires of the AC power cord through the hole of the metal wiring compartment.
12. Screw the retaining nut onto the AC power cord to secure it to the metal wiring compartment.

13. Connect the wires to the AC terminal block on the three-phase delta AC power supply (Figure 5). Loosen each of the input terminal or grounding point screws, insert the wire into the grounding point or input terminal, and tighten the screw.

    Note: The terminal connections have either slotted screws or hex screws. Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in (4-mm) Allen wrench for the 5/16-in hex screws.

    1. Insert the wire labeled GND into the grounding point labeled GND.
    2. Insert the wire labeled L1 into the L1 input terminal
    3. Insert the wire labeled L2 into the L2 input terminal.
    4. Insert the wire labeled LC3 into the LC3 input terminal.

    Figure 5: Connecting Power to a Three-Phase Delta AC Power Supply

    
14. Verify that the power cord wire connections are correct.
15. Using a number 2 Phillips (+) screwdriver, tighten the two captive screws on the metal AC wiring compartment.
16. Verify that the AC power cord is not touching or blocking access to router components, and that it does not drape where people could trip on it.
17. Remove the ESD grounding strap from the ESD points on the chassis. Connect the strap to an approved site ESD grounding point. See the instructions for your site.
18. Connect the AC power cord plug to the power source.
19. Switch on the customer site circuit breakers to provide voltage to the AC power cord.
20. 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.
21. Verify that the AC OK LED on the power supply faceplate is lit steadily, indicating that the AC terminal block is receiving power.
22. Switch the power switch on the power supply to the ON position (|) to provide power to the router components.
23. Verify that the DC OK LED on the power supply faceplate is lit steadily, indicating that the power supply is correctly installed and is functioning properly. The DC OK LED blinks momentarily, then lights steadily.

    Note: 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 6: Installing a Three-Phase Delta AC Power Supply