UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


24V Power Supply (Flywheel Cabinet)

Usage:

UPS 250 APZ

Description



Illustration 1g01277729
Location of the 24 VDC Power Supply
(1) 24 VDC Power Supply

The 24 VDC Power Supply (1) is located on the upper plenum of the cabinet for the flywheel. The power supply (1) is a 24V/350W supply that is used to convert incoming AC voltage to 24 VDC for use by the system.

Removal Procedure

Refer to Systems Operation, Testing and Adjusting, RENR9988, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.

  1. Remove the three screws that secure the swing out panel for the APC board.


    Illustration 2g01277737
    View of the Left Side
    (2) Bolt

  2. Remove the bolt (2) on the left side that connects the power supply (1) to the ceiling of the cabinet. Refer to Illustration 2.


    Illustration 3g01277736
    View of the Right Side
    (3) Tabbed Slot

  3. Move the power supply (1) to the left. Remove the right side mount from the tabbed slot (3). Remove the power supply (1). Refer to Illustration 3.

  4. Disconnect the wires from the power supplies. Verify the labels on the wiring for subsequent installation.

Installation Procedure

  1. Connect the wires to the power supplies. Verify the labels on the wiring with the location of the wiring.

  2. Install the power supply (1) in the cabinet for the flywheel.

  3. Install the bolt (2) that connects the power supply (1) to the cabinet.

  4. Install the three screws that secure the swing out panel for the APC board.

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