The secondary circuit wiring in the cabinet and relevant detection tests shall be completed. After the distribution cabinet equipment arrives at the site, it shall be timely organized for acceptance under the supervision and guidance of Party A's on-site engineer and supervisor. The relevant technical documents shall be complete, the distribution cabinet shall be well packaged and sealed, all components shall be complete and intact, and the wiring shall be reliable. After the distribution cabinet is installed and fixed, the secondary wiring circuit of the distribution cabinet shall be subject to insulation test one by one. 500V insulation test instrument shall be used for the test, and the test result shall be greater than 1m Ω.

All secondary circuit control wires or cables shall be multi strand soft copper wires, and the wiring terminals shall be of appropriate specifications. After tin ironing, they shall be crimped with special crimping pliers, and neutral flux shall be used during tin ironing.

Before installation, the internal environment of the control room shall be qualified, all interior decoration construction has been completed, and the indoor clean and safe a distribution cabinet shall be installed and fixed:

① After the distribution cabinet is transported to the site, organize unpacking inspection to check whether there is deformation and paint falling, whether the instrument components are complete, and whether there are defects in spare parts and instructions, and make unpacking records.

② According to the layout of the construction drawing, the switch cabinet shall be placed on the foundation section steel in sequence. After the rows of cabinets are in place, first align the cabinets at both ends, then stretch a small line at the two-thirds height from the bottom to the top of the cabinet, and align them one by one, taking the cabinet surface as the standard. 0.5mm shims shall be used for adjustment during alignment, and the number of shims Z at each place shall not exceed three.

③ After positioning and alignment, fix the cabinet according to the size of the cabinet fixing screw hole. The cabinet body and the cabinet body, and the cabinet body and the side baffle are connected with galvanized screws. The high and low voltage switchgear shall be firmly welded with the reserved angle steel. The exposed part above the cable interlayer shall be fully paved with checkered steel plate, and 1200mm shall be used in front and back of the cabinet × 10mm (width) × Thick) insulation shall be fully paved.