• Topic ID: id_17423225
  • Version: 3.0
  • Date: Apr 22, 2019 12:56:27 AM

Gantry Stationary Power Supply 120VAC Cable Replacement

Prerequisites

Overview

This procedure defines the steps to replace the 120VAC input power cable for stationary power supply on Optima CT660 M40, Optima CT680 and Revolution EVO gantry.

Procedure

    • warning
    • POTENTIAL FOR SHOCK.
    • VOLTAGE MAY BE PRESENT. POTENTIAL FOR INJURY IF COVERS REMOVED AND POWER IS LEFT ON.
    • ALWAYS REMOVE THE RIGHT SIDE COVER FIRST. FOLLOW APPROPRIATE LOTO PROCEDURES.
  1. Remove gantry right side cover.
    note:

    Replacement should be done from the front or back of the gantry.

  2. Refer to Parts Replacement → Gantry → Enclosure → (Cover Removal Procedure).
  3. Stop the rotor of X-ray tube in case of Liquid Bearing Tube before HVDC off. Refer to Liquid Bearing Tube Rotor stop procedure for details
    4. Notice Image
    • notice
    • Always turn OFF the HVDC before the 120VAC. Turning OFF 120VAC power before HVDC power can result in equipment damage.
  4. Turn OFF the three (3) main power switches (HVDC, 120VAC, and Axial Drive) on the Service Switch Panel (SSP).
  5. Perform all required LOTO procedures before beginning this procedure.
  6. Remove the gantry left side cover, top covers and front cover.
  7. Remove the AC power connections from the stationary power supply.

    Figure 1. AC Power Connection

  8. Cut cable-ties and disconnect the AC cable.

    Figure 2. AC Cable Disconnection

  9. Install new 120VAC cable and connect it to Power supply and connector.
  10. Route the 120VAC cable as shown in the picture and fix it by cable-ties.

    Figure 3. 120VAC Cable Routing

  11. Route the 120VAC cable as shown in the picture and fix it by cable-ties.

Finalization

  1. Install the gantry front cover and check the front cover bracket does not interfere with the 120VAC cable.

    Figure 4. Front Cover Bracket

  2. Install the gantry top covers
  3. Turn on the 120 VAC, HVDC and Axial Drive service switches from the service switch panel.

    Confirm the gantry starts up normally

  4. Tilt the gantry all the range and check the front cover bracket does not interfere with the120VAC cable during the movement.
  5. Install the both side covers.