Model 6 Motor Control Centers – Instruction Bulletin PDF
80459-641-01, Rev. 09

Removing the Compac™ 6 Control Unit

DANGER
Hazard of Electric Shock, Explosion, or Arc Flash
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462.
  • This equipment must only be installed and serviced by qualified electrical personnel.
  • Turn off all power supplying this equipment before working on or inside it.
  • Always use a properly rated voltage sensing device to confirm power is off.
  • Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.

  1. Turn off all power supplying this equipment before working on or inside the equipment, and follow lockout/tagout procedures. Always use a properly rated voltage sensing device to confirm power is off.

  2. Move the operator handle to the OFF position (see Operator Handle in the OFF Position).

    Operator Handle in the OFF Position

  3. Loosen the captive fasteners (see Loosening Captive Fasteners) on the door and open it.

    NOTE: Arc-rated units have additional fasteners at the topmiddle and bottom-middle of the door that must be loosened to open the door (see Arc-Rated MCC Door Latches).

    Loosening Captive Fasteners

  4. Check for live circuits using a properly rated voltage sensing device. Deenergize any voltage sources.

    NOTE: Removal of the control station plate may be necessary to perform Steps 5 and 6. To remove the control station plate, follow these steps:

    1. Loosen the captive mounting screws holding the plate to the front of the unit.

    2. Remove the plate from the unit (see Control Station Plate Removed).

    3. Re-attach the plate after disconnecting the load wires and control terminal block.

      NOTE: Do not disconnect the wires to the control station plate.

    Control Station Plate Removed

  5. Disconnect the power wiring from the starter terminals. Tag the terminations for re-installation.

  6. Remove the top portion of the pull-apart control terminal block to which field wiring is connected.

  7. Push the power leads and the top portion of the control pull-apart terminal blocks through the wiring port and into the vertical wireway.

  8. Grasp the operator handle flange and press down on the structure interlock release (see Operator Handle and Interlock Release).

    Operator Handle and Interlock Release

  9. Firmly pull the unit forward to disengage the power stabs from the vertical bus. The unit should now slide freely from the MCC structure.

  10. The operator mechanism-to-structure interlock prevents the control unit from being inserted or withdrawn with the handle in the ON position.

  11. If the withdrawn unit is left in the structure, use appropriate lock-out/tag-out procedures to avoid re-loading by non-authorized personnel.

  12. Remove the control unit from the structure and place it on a flat surface for servicing.

    NOTE: Partial disassembly of the unit may be necessary to gain access to various electrical connections for servicing.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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