• Topic ID: id_15460629
  • Version: 3.0
  • Date: Jun 15, 2020 10:52:05 PM

Start Electrician on PDU Hookup

Prerequisites

1 Position the Power Distribution Unit

Procedure

  1. Roll the PDU into position on its permanently mounted casters. Leave at least 15.5 cm (6 in.) between the PDU and back wall to allow cooling air to circulate.
  2. Run the main input power conductors and ground though flexible metal conduit (attached between the PDU chassis and room duct-work) so you can move the PDU away from the wall during service.

    Figure 1. Flexible Conduit for PDU Power

  3. Locate the hole cover plate in Box 1 and attach the flexible metal conduit to the PDU.
  4. If present, remove the TS1 panel front cover.
  5. Strip the wires to fit securely on the power block.
  6. Observe incoming phases (L1, L2, and L3) and insert bare leads into power block.
  7. Insert vault ground into PDU vault ground lug.
  8. Tighten all fasteners securely and replace the TS3 front panel.

    Figure 2. PDU Area Locations

    Figure 3. PDU Power Connections

2 System Ground Connection

Procedure

    • warning
    • WORK WITH THE ELECTRICAL CONTRACTOR TO BE SURE EXTERNAL POWER SOURCE IS TURNED OFF.
  1. Connect the ground wire (green with a yellow stripe) from the table/gantry raceway ground bus to the system ground lug in the PDU.

    Figure 4. PDU System Ground Connection

3 Warning Light Configuration & Connection

Procedure

  1. Warning light is controlled by signals from the system.
  2. This step is site-specific. The PDU by default is configured for no external warning light connection. If you have external warning lights, see Figure 5 for proper connection.

    Figure 5. Typical TS6 Warning Light & Door Interlock Connections

    It is recommended that you use the four (4) wire method of adding an x-ray warning light to a room, as shown in Figure 5. When using this method, you:

    • Minimize EMC interference.

    • Increase contact life of the relay used in the PDU.

4 Door Interlock Connections

Procedure

    Notice Image
    • notice
    • WARNING: If a door interlock is used, remove the jumper (terminals 9 and 10).
  1. Door interlocks are used to prevent x-rays from being generated when the scan room door is open.

    The door interlock circuitry in the PDU is shipped from the factory engaged. This means the system cannot generate x-ray until disengaged. A short must exist between pins 9 & 10 for x-ray to be generated. Using a small piece of wire, short pins 1 and 2 together. See Figure 6.

    This is a dry (No Power) contactor for use by a door interlock.

    note:

    This should be wired according to local code.

    Figure 6. Without a Door Interlock

  2. To use the system with a door interlock, wire a normally open switch between pins 1 & 2 that is attached to the interlock.

    Figure 7. With a Door Interlock

Finalization

No finalization steps.