990-91381A-001

Prepare for Installation

  1. Remove the brackets (A) and (B) from the maintenance bypass cabinet. Install the brackets (A) on the rear of the maintenance bypass cabinet. Save the bracket (B) for top interconnection with the UPS.

    Right Side View of the Maintenance Bypass Cabinet

    Rear View of the Maintenance Bypass Cabinet

  2. Remove the right side panel from the maintenance bypass cabinet.

    The Maintenance Bypass Cabinet

  3. Remove the left side panel from the UPS. Install the left side panel on the maintenance bypass cabinet.

    The Maintenance Bypass Cabinet and the UPS

  4. Push the maintenance bypass cabinet into final position. Align with seismic anchoring, if present. For systems without seismic anchoring, reinstall the rear transportation bracket on the maintenance bypass cabinet and mount it to the floor.

    Rear View with Seismic Anchoring

    Rear View without Seismic Anchoring

  5. Prepare for power cables:
    1. Remove the top or bottom gland plate.
    2. For bottom cable entry, remove the rear caster and the caster screws from the bottom gland plate. Discard the caster.
    3. Drill or punch holes for power cables or grommets in the gland plate. Grommets are not provided.
    4. Reinstall the top or bottom gland plate.
    DANGER
    hazard of electric shock, explosion, or arc flash
    Do not drill or punch holes with the gland plates installed and do not drill or punch holes in close proximity to the cabinet.
    Failure to follow these instructions will result in death or serious injury.

    Top Cable Entry

    Bottom Cable Entry

  6. Open the inner door on the UPS.
  7. Remove the transparent protection covers in the UPS.

    Front View of the UPS

  8. Remove busbars from the UPS. Some of the busbars will be installed in the maintenance bypass cabinet:
    1. Remove the three busbars from the UPS. Install the three busbars in the maintenance bypass cabinet.
    2. Remove the three busbars from the UPS. Only for dual mains: Install the three busbars in the maintenance bypass cabinet.
    3. Remove the three busbars from the UPS. Save for load bank breaker (LBB) option if this is part of the system.
    4. Remove the four busbars from the UPS. Discard or save for spare parts.

    Front View of the UPS

    Front View of the Maintenance Bypass Cabinet

  9. Only for TNC earthing system: Install the provided jumper busbar to connect the N busbar to the PE busbar as shown.

    Front View of the Maintenance Bypass Cabinet

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