The high voltage test shall be conducted by a test unit approved by the local power supply department. High voltage cabinet frame, bus, lightning arrester, high voltage porcelain bottle, voltage transformer, current transformer, various switches, etc. Over current relay adjustment, time relay, signal relay adjustment and mechanical interlocking adjustment. Connect the temporary control power supply and operation power supply; Remove the phase line at the upper end of the control and operation power circuit fuse in the cabinet (panel) and connect the temporary power supply.

1. Cabinet (panel) installation: the distribution cabinet shall be placed on the foundation section steel one by one according to the layout of the construction drawing. The adjustment of the perpendicularity of the cabinet surface and side of a separate cabinet (panel) can be solved by adding sizing blocks, but not more than three pieces, and shall be firmly welded. After each cabinet (panel) in a row is in place, the levelness of the cabinet and the deviation of the panel surface shall be adjusted to meet the provisions of the construction specifications.

2. The wall mounted distribution box can be fixed on the wall with expansion bolts, but the hollow brick or block wall shall be embedded with dovetail bolts or fixed with split bolts.

3. When installing Taian distribution box, the embedded box shall be embedded, and the panel shall be flush with the wall after installation.

4. After the cabinet (panel) is adjusted, the cabinet body and the foundation section steel shall be fastened with bolts.

5. Cabinet (panel) grounding: each cabinet (panel) is separately connected with the foundation section steel. Copper wire can be used to reliably connect the PE row in the cabinet with the grounding bolt, and spring washer must be added for anti loosening treatment. Each cabinet door shall be reliably connected with PE row with copper braided wire.

6. The top of the cabinet (panel) shall be connected with the bus. Note that the bus shall be fastened with a matching wrench as required, and the contact surface shall be coated with neutral Vaseline. When connecting the busbar between cabinets, pay attention to whether the busbar is too close to other devices or shells, and pay attention to the correct phase.

7. Control circuit inspection: check whether the line is loose due to transportation and other factors, fasten it one by one, and whether the electrical components are damaged. In principle, the cabinet (panel) control circuit is calibrated before leaving the factory, and the circuit in the cabinet shall not be adjusted without permission.