Analysis on the Installation of Assembled Distribution Cabinets and Distribution Boxes in Electrical Engineering

1 Personnel Training

First, improve the operational management system for distribution transformers. Institutionalization is a crucial means for transformer safety management. As errors and faults are inevitable in distribution management, it is necessary to establish a strict reward and punishment mechanism to regulate employee discipline and work behavior. Only with standardized systems can staff motivation be fully mobilized, preventing situations like passive work evasion and serious negative emotions due to issues like favoritism in personnel appointments. Systems can often address situations beyond human capability and form a practical and effective reference standard.

Second, strengthen the training of technical personnel in the power supply office. Human resources are the vital force of the power supply office. Only with complete staffing and seamless coordination among employees can work be done to the best standard. Education on transformer safety management must be implemented effectively. Only when safety concepts are taken seriously by everyone can transformer safety management policies be promoted and their feasibility enhanced. Simultaneously, improving employees' personal quality and professional skills is an important development direction. Only by enhancing the overall quality can staff better play a positive role in the overall construction of the power supply office.

Third, establish files for distribution transformers. Record the usage status of transformers and distribution indicators at various stages in detail for future reference. This not only provides great convenience for future transformer use and replacement but also offers valuable field data for China's power construction, serving as a retention for future power industry development and providing a strong guarantee.

2 Equipment Installation Steps

2.1 Installation of Distribution Cabinets or Panels

First, the installation steps for the base channel steel. When installing the straightened channel steel, customize the base channel steel frame according to the construction drawings, and paint the base steel frame to prevent rust. When fixing the customized base steel frame, place it on the iron parts according to the position specified in the drawings, ensuring it is level and straight. Use a level to check for levelness.

Second, the fixing technique for the distribution cabinet (panel). After installing the base channel steel, place the distribution cabinet (panel) on it according to the design drawings. When installing a single cabinet or panel, only the verticality of the cabinet face and side needs to be determined.

Third, the secondary wiring for the cabinet or panel. Check the electrical components on the cabinet or panel to see if they meet the design requirements of the construction drawings. The rated voltage must match the power supply's operating voltage and control voltage. Connect and calibrate the control wiring between cabinets, ensuring the core wires are connected to the terminal board.

Finally, the selection of distribution transformers involves significant considerations. It directly affects the level of losses in the agricultural power grid. Therefore, the selection of distribution transformers must not be taken lightly. Choose the most suitable transformer based on the local power adaptation situation. For distribution activities, transformer selection is also the most critical link. A mismatched choice – excessive capacity will inevitably cause resource waste, while insufficient capacity will be inadequate for the orderly progress of the power supply process, easily leading to a series of faults. Thus, its importance is self-evident. Based on the above research, it can be seen that transformer capacity issues cannot be underestimated. Transformer capacity measurement is calculated based on the amount of current passing through within the same period. Therefore, extra caution is needed when selecting transformers. As the functions and models of various transformers have similarities, we should focus on considering power and working conditions, not just decide based on appearance and model. Only by selecting the most suitable transformer can the smooth progress of power supply be ensured. Fully consider various situations, investigate the population level, electricity consumption, and per capita electricity usage level of the area the transformer will serve. Conduct long-term monitoring to obtain average, maximum, and minimum values. Consider comprehensively to avoid unnecessary resource waste.

2.2 Installation of Distribution Boxes

(1) Surface-mounted Distribution Boxes

First, fix the distribution box or panel using an iron frame. Straighten the angle steel, measure the dimensions, mark the cutting lines based on the dimensions, perform bending and cutting, locate the drilling positions, and finally weld it. During bending construction, align it correctly before welding the joint positions. The end to be embedded should be made into a dovetail shape. After rust removal, apply anti-rust paint.

Second, fix the distribution box or panel using bolts. When fixing the distribution box or panel, choose metal expansion bolts, which can be fixed directly onto the wall. The main method is as follows: first, determine the fixing point positions, which can be done using a string positioning method. After locating the positions, use an electric drill to drill holes. The hole size should match the sleeve size of the metal expansion bolt, allowing it to be inserted snugly. When drilling, ensure the holes are drilled vertically.

(2) Recessed Distribution Boxes or Panels. Based on the voids reserved during the civil engineering construction, determine the elevation and dimensions of the box body. Then, fix and level the box, and fill the edges with cement mortar. When plastering the wall, do so after fixing the external metal mesh. During plastering, be careful to avoid plaster on the box panel. When installing the distribution panel, the surface should be flat, gaps should be filled evenly, and the panel should be installed adjusted correctly.

(3) Insulation Resistance Testing. After installing the distribution box or panel, perform an insulation resistance test using a 500-volt megohmmeter. The main tests include insulation resistance between phases, between phase and ground, between phase and neutral, and between neutral and ground.