This information may be helpful when replacing the truck assembly for a 38kV UVH H-type VCB, especially when the breaker is already installed in the switchgear.

Applicable Item Code

65423173812 MECHANISM ASS’Y, TRUCK, P300, S490, 10a10b, 3P, UVH

Requirement: 38kV VCB Lifter

When the VCB is installed in switchgear, a lifter is required. LS Electric provides two types of lifters:

1. UVH-38 Lift (Left)

- Sits flush on the floor

- Can be used like a manual forklift

- Requires a flat, level surface

2. Lifter for forklift (Right)

- Used together with a forklift

- Required when 1. UVH-38 Lift cannot be used

When using the lifter with a forklift, extra attention to safety procedures is required. This guidance applies to sites where standard 38kV lifters cannot be used.

Before Starting Work

1. Ensure the surrounding area is clean and clear

2. Confirm sufficient access space for the forklift

3. In this case, fencing was removed to secure adequate working space

4. Verify the forklift can approach straight and level with the installed cradle

The forklift forks must be kept straight and at the same level as the cradle at all times to avoid tipping or breaker damage.

2. Front Cover Removal

- Unscrew seven M8 hex bolts

- Remove the front cover

- Disconnect auxiliary (AUX) contacts and confirm they are fully unplugged

3. Side and Frame Bolts

4. Reassemble the new mechanism truck assembly by following the disassembly steps in reverse order.

- Make sure the AUX plug is properly reconnected before completing the replacement.

Key Safety Reminder

- Always prioritize personnel safety

- Avoid any condition that could cause the VCB to tip, shift, or drop

- If proper lifting tools are not available, do not proceed